MAXUS ENERGY CORP /DE/
SC 14D1, 1995-03-03
CRUDE PETROLEUM & NATURAL GAS
Previous: BALLARD MEDICAL PRODUCTS, SC 13G, 1995-03-03
Next: MAXUS ENERGY CORP /DE/, SC 14D9, 1995-03-03






                          SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C. 20549

                                    SCHEDULE 14D-1
                      Tender Offer Statement Pursuant to Section
                 14(d)(1) of the Securities and Exchange Act of 1934

                               ----------------------
                               Maxus Energy Corporation
                              (Name of Subject Company)
                               ----------------------
                                YPF Acquisition Corp.
                                       YPF S.A.
                                      (Bidders)
                               ----------------------
                       Common Stock, Par Value $1.00 Per Share
                            (Title of Class of Securities)

                               ----------------------

                                     577730 10 4
                        (CUSIP Number of Class of Securities)
                               ----------------------
                                Mr. Jose A. Estenssoro
                             Avenida Roque Saenz Pena 777
                             1364 Buenos Aires, Argentina
                                   (54)(1) 329-2000

                                   with a copy to:

                               P. Dexter Peacock, Esq.
                                Andrews & Kurth L.L.P.
                              4200 Texas Commerce Tower
                                 Houston, Texas 77002
                                    (713) 220-4200

            (Names, Addresses and Telephone Numbers of Persons Authorized
             to Receive Notices and Communications on Behalf of Bidders)

                               ----------------------

                              Calculation of Filing Fee
                                                                           
      -------------------------------------------------------------------------

      Transaction valuation: $745,237,378*Amount  of  filing fees:  $149,048.00
                                                                           
      -------------------------------------------------------------------------

          *   For  purposes of calculating fee only.  The amount assumes the
              purchase of  135,497,705 Shares (as  defined herein)  at $5.50
              per Share  in cash.  The amount of the  filing fee, calculated
              in  accordance with  Rule 0-11(d)  of the  Securities Exchange
              Act of  1934, as  amended, equals 1/50  of one percent  of the
              aggregate of the cash offered for such number of Shares.

          [ ]   Check  box if any part of the fee is offset by Rule 0-11(a)(2)
              and  identify the  filing  with which  the offsetting  fee was
              previously  paid.      Identify   the   previous   filing   by
              registration  statement number,  or the  Form or  Schedule and
              the date of its filing.

        Amount Previously Paid:   Not applicable  Filing Party:  Not applicable
        Form or Registration No.: Not applicable  Date Filed:    Not applicable

<PAGE>



CUSIP No. 577730 10 4        14D-1            Page 2 of 9 Pages
- -------------------------------------------------------------------------
1  NAME OF REPORTING PERSONS
   S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

   YPF Acquisition Corp.
- -------------------------------------------------------------------------
2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                                      (a) [ ]
                                                      (b) [ ]
- -------------------------------------------------------------------------
3  SEC USE ONLY
- -------------------------------------------------------------------------
4  SOURCES OF FUNDS

   BK; AF
- -------------------------------------------------------------------------
5  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
   IS REQUIRED PURSUANT TO ITEMS 2(e) OR 2(f)         [ ]
6  CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
- -------------------------------------------------------------------------
7  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   0
- -------------------------------------------------------------------------
8  CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN
   SHARES                                             [ ]
- -------------------------------------------------------------------------
9  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7)

   0.0%
- -------------------------------------------------------------------------
10 TYPE OF REPORTING PERSON

   CO

                                        2

<PAGE>


CUSIP No. 577730 10 4        14D-1            Page 3 of 9 Pages
- -------------------------------------------------------------------------
1  NAME OF REPORTING PERSONS
   S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

   YPF S.A.
- -------------------------------------------------------------------------
2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                                      (a) [ ]
                                                      (b) [ ]
- -------------------------------------------------------------------------
3  SEC USE ONLY
- -------------------------------------------------------------------------
4  SOURCES OF FUNDS

   BK
- -------------------------------------------------------------------------
5  CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS
   IS REQUIRED PURSUANT TO ITEMS 2(e) OR 2(f)         [ ]
- -------------------------------------------------------------------------
6  CITIZENSHIP OR PLACE OF ORGANIZATION

   Republic of Argentina
- -------------------------------------------------------------------------
7  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   2,000 Shares
- -------------------------------------------------------------------------
8  CHECK IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN
   SHARES                                             [ ]
- -------------------------------------------------------------------------
9  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7)

   0.0%
- -------------------------------------------------------------------------
10 TYPE OF REPORTING PERSON

   CO


                                     3

<PAGE>


          This Tender  Offer  Statement on  Schedule  14D-1  (the
"Schedule 14D-1") relates to the offer by YPF  Acquisition Corp.,
a  Delaware  corporation  (the "Purchaser")  and  a  wholly owned
subsidiary  of YPF Sociedad Anonima, a sociedad anonima organized
under the laws of the  Republic of Argentina ("YPF"), to purchase
all outstanding shares of common stock, par value $1.00 per share
(the "Shares"), of Maxus Energy Corporation (the "Company"), upon
the terms and subject to the conditions set forth in the Offer to
Purchase, dated March  3, 1995 (the "Offer to  Purchase"), and in
the  related Letter of Transmittal (which together constitute the
"Offer"), which are  annexed to and filed with  this Statement as
Exhibits (a)(1) and (a)(2), respectively.

Item 1 - Security and Subject Company

          (a)  The  name of the  subject company is  Maxus Energy
Corporation,  a Delaware  corporation.   The  principal executive
offices of the  Company are located at 717  North Harwood Street,
Dallas, Texas, 75201.

          (b)  The  class of  equity  securities  to  which  this
Schedule 14D-1 relates  is the common stock, par  value $1.00 per
share,  of   the  Company.     The   information  set   forth  in
"Introduction" of the Offer to Purchase is incorporated herein by
reference.

          (c)  The  information  set forth  in Section  6 ("Price
Range  of  Shares;  Dividends")  of  the  Offer  to  Purchase  is
incorporated herein by reference.

Item 2 - Identity and Background

          (a)-(d) and (g) This Schedule  14D-1 is being filed  by
the   Purchaser  and   YPF.    The   information  set   forth  in
"Introduction," Section  8 ("Certain  Information Concerning  the
Purchaser and YPF")  and in Schedule I  ("Directors and Executive
Officers of  YPF and the Purchaser") of  the Offer to Purchase is
incorporated herein by reference.

          (e) and  (f)  During the  last five years,  neither the
Purchaser nor YPF  or, to the best of their knowledge, any of the
persons listed in  Schedule I ("Directors and  Executive Officers
of YPF and the Purchaser") to the  Offer to Purchase (i) has been
convicted in a criminal  proceeding (excluding traffic violations
or  similar  misdemeanors)  or  (ii)  was  a  party  to  a  civil
proceeding  of a  judicial or  administrative  body of  competent
jurisdiction and as a result of such proceeding was or is subject
to a judgment, decree or final order enjoining further violations
of,  or prohibiting  activities  subject  to,  federal  or  state
securities laws or finding any violations of such laws.

Item  3 -  Past Contacts, Transactions  or Negotiations  with the
Subject Company

          (a)-(b)  The  information set forth in  "Introduction,"
Section  8  ("Certain  Information Concerning  the  Purchaser and
YPF"),  Section  10  ("Background of  the  Offer;  Past Contacts,
Transactions  or Negotiations with  the Company") and  Section 11
("Purpose of the  Offer; the Merger; Merger  Agreement; Plans for
the Company") of the Offer  to Purchase is incorporated herein by
reference.

                                4

<PAGE>


Item 4 - Source and Amount of Funds or Other Consideration

          (a)-(b)    The  information  set  forth  in  Section  9
("Source  and Amount  of  Funds")  of the  Offer  to Purchase  is
incorporated herein by reference.

          (c)  Not applicable.

Item 5 -  Purpose of the Tender  Offer and Plans or  Proposals of
the Bidder

          (a)-(e)  The  information set forth  in "Introduction,"
Section  6 ("Price  Range  of  Shares;  Dividends"),  Section  10
("Background  of   the  Offer;  Past  Contacts,  Transactions  or
Negotiations  with the  Company"), Section  11  ("Purpose of  the
Offer; the Merger; Merger Agreement; Plans for the Company")  and
Section  13 ("Dividends  and  Distributions")  of  the  Offer  to
Purchase is incorporated herein by reference.

          (f)-(g)     The  information set  forth  in Section  12
("Effect of  the Offer on  the Market for Shares;  Stock Exchange
Listing; Registration Under  the Exchange Act")  of the Offer  to
Purchase is incorporated herein by reference.

Item 6 - Interest in Securities of the Subject Company

          (a)-(b)     The     information     set     forth    in
"Introduction," Section  8 ("Certain  Information Concerning  the
Purchaser  and YPF"), Section 10 ("Background  of the Offer; Past
Contacts,  Transactions or  Negotiations with  the Company")  and
Section 11 ("Purpose  of the Offer; the Merger; Merger Agreement;
Plans for the Company") of  the Offer to Purchase is incorporated
herein by reference.

Item 7 - Contracts, Arrangements, Understandings or Relationships
with Respect to the Subject Company's Securities

          The information set forth in "Introduction," Section  8
("Certain Information Concerning the Purchaser and YPF"), Section
10  ("Background of  the Offer;  Past  Contacts, Transactions  or
Negotiations with the  Company") and Section 11  ("Purpose of the
Offer; the Merger; Merger Agreement;  Plans for the Company")  of
the Offer to Purchase is incorporated herein by reference.

Item 8 - Persons Retained, Employed or to be Compensated

          The  information   set  forth  in   "Introduction"  and
Section  16 ("Fees  and Expenses")  of the  Offer to  Purchase is
incorporated herein by reference.

Item 9 - Financial Statements of Certain Bidders

          The  information  set  forth  in  Section  8  ("Certain
Information Concerning  the Purchaser and  YPF") of the  Offer to
Purchase is incorporated herein by reference.

          The incorporation  by  reference herein  of the  above-
referenced financial information does not constitute an admission
that such information is material  to a decision by a stockholder
of  the Company  whether to  sell,  tender or  hold Shares  being
sought in the Offer.

                               5


<PAGE>


Item 10 - Additional Information

          (a)    The  information  set  forth  in "Introduction,"
Section  8 ("Certain  Information  Concerning  the Purchaser  and
YPF"),  Section  10  ("Background of  the  Offer;  Past Contacts,
Transactions  or Negotiations with  the Company") and  Section 11
("Purpose of  the Offer; the Merger; Merger  Agreement; Plans for
the Company") of the Offer  to Purchase is incorporated herein by
reference.

          (b)-(c)   The  information  set  forth  in  Section  11
("Purpose of the  Offer; the Merger; Merger Agreement;  Plans for
the  Company") and Section  15 ("Certain Legal  Matters; Required
Regulatory Approvals") of  the Offer to Purchase  is incorporated
herein by reference.

          (d)  The information  set forth in Section 12  ("Effect
of the  Offer on the  Market for Shares; Stock  Exchange Listing;
Registration Under the Exchange Act") of the Offer to Purchase is
incorporated herein by reference.

          (e)  The  information set forth in Section 15 ("Certain
Legal  Matters; Required Regulatory  Approvals") of the  Offer to
Purchase is incorporated herein by reference.

          (f)    The  information  set  forth  in  the  Offer  to
Purchase and the  related Letter of Transmittal,  copies of which
are  attached hereto as Exhibits (a)(1) and (a)(2), respectively,
is incorporated herein by reference in its entirety.

Item 11 - Material to be Filed as Exhibits

          (a)(1)    Offer to Purchase, dated March 3, 1995.

          (a)(2)    Letter of Transmittal.

          (a)(3)    Notice of Guaranteed Delivery.

          (a)(4)    Letter from Salomon  Brothers Inc to Brokers,
                    Dealers,  Commercial  Banks,  Trust Companies
                    and Other Nominees, dated March 3, 1995.

          (a)(5)    Letter  to  Clients   for  use  by   Brokers,
                    Dealers,  Commercial  Banks,  Trust Companies
                    and Other Nominees.

          (a)(6)    IRS Guidelines for  Certification of Taxpayer
                    Identification Number on Substitute Form W-9.

          (a)(7)    Summary Advertisement, dated March 3, 1995.

          (b)(1)    Commitment Letter.

                                6
<PAGE>







          (c)(1)    Agreement of Merger, dated as of February 28,
                    1995, among  YPF S.A., YPF  Acquisition Corp.
                    and Maxus Energy Corporation.

          (c)(2)    Guaranty Agreement, dated  February 28, 1995,
                    among YPF  S.A. and The  Prudential Insurance
                    Company of America.

          (c)(3)    Letter between  Maxus Energy  Corporation and
                    The  Prudential   Insurance  Company,   dated
                    February 28, 1995.

          (c)(4)    Agreement Regarding Expenses,  dated February
                    28, 1995.

          (d)  Not applicable.

          (e)  Not applicable.

          (f)  Not applicable.




                                   7







<PAGE>


                            SIGNATURE

          After due inquiry and to the  best of its knowledge and
belief,  the undersigned certifies that the information set forth
in this statement is true, complete and correct.

Dated:  March 3, 1995



                                   YPF S.A.



                                   By:                           
                                       --------------------------
                                       Name:  
                                       Title:


                                   YPF Acquisition Corp.



                                   By:                           
                                       --------------------------
                                       Name:
                                       Title:




                                    8







<PAGE>

                          EXHIBIT INDEX

Exhibit             Exhibit Name
- -------             ------------

(a)(1)    Offer to Purchase, dated March 3, 1995.

(a)(2)    Letter of Transmittal.

(a)(3)    Notice of Guaranteed Delivery.

(a)(4)    Letter from  Salomon Brothers Inc  to Brokers, Dealers,
          Commercial Banks,  Trust Companies and  Other Nominees,
          dated March 3, 1995.

(a)(5)    Letter  to  Clients  for   use  by  Brokers,   Dealers,
          Commercial Banks, Trust Companies and Other Nominees.

(a)(6)    IRS   Guidelines   for    Certification   of   Taxpayer
          Identification Number on Substitute Form W-9.

(a)(7)    Summary Advertisement, dated March 3, 1995.

(b)(1)    Commitment Letter.

(c)(1)    Agreement  of Merger, dated February 28, 1995 among YPF
          S.A.,   YPF   Acquisition   Corp.   and  Maxus   Energy
          Corporation.

(c)(2)    Guaranty Agreement, dated February  28, 1995 among  YPF
          S.A. and the Prudential Insurance Company of America.

(c)(3)    Letter  between  Maxus   Energy  Corporation  and   The
          Prudential Insurance Company, dated February 28, 1995.

(c)(4)    Agreement Regarding Expenses, dated February 28, 1995.

(d)       Not applicable.

(e)       Not applicable.

(f)       Not applicable.





                                9




                                                                Exhibit (a)(1)

                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
 
                            MAXUS ENERGY CORPORATION
                                       AT
                              $5.50 NET PER SHARE
 
                                       BY
 
                             YPF ACQUISITION CORP.
 
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                              YPF SOCIEDAD ANONIMA
 
     THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
                                   CITY TIME,
           ON THURSDAY, MARCH 30, 1995, UNLESS THE OFFER IS EXTENDED
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (1) THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN BY THE EXPIRATION DATE A NUMBER OF SHARES THAT
REPRESENTS NOT LESS THAN A MAJORITY OF THE COMPANY'S VOTING SHARES OUTSTANDING
ON A FULLY DILUTED BASIS AND (2) FINANCING HAVING OCCURRED UNDER THE LOAN
AGREEMENT CONTEMPLATED BY THE BANK COMMITMENT LETTER RECEIVED BY YPF. SEE
SECTIONS 1, 14 AND 15.
 
    THE BOARD OF DIRECTORS OF THE COMPANY HAS DETERMINED THAT THE OFFER AND THE
MERGER ARE IN THE BEST INTERESTS OF THE COMPANY AND ITS STOCKHOLDERS AND
RECOMMENDS THAT HOLDERS OF SHARES OF COMMON STOCK ACCEPT THE OFFER AND TENDER
THEIR SHARES PURSUANT TO THE OFFER.
 
                                   IMPORTANT
 
    Any stockholder desiring to tender all or any portion of such stockholder's
Shares should either (a) complete and sign the enclosed Letter of Transmittal
(or a facsimile copy thereof) in accordance with the instructions in the Letter
of Transmittal and mail or deliver it together with the certificate(s)
representing tendered Shares, and any other required documents, to the
Depositary or tender such Shares pursuant to the procedure for book-entry
transfer set forth in Section 3 or (b) request such stockholder's broker,
dealer, commercial bank, trust company or other nominee to effect the
transaction for such stockholder. A stockholder whose Shares are registered in
the name of a broker, dealer, commercial bank, trust company or other nominee
must contact such broker, dealer, commercial bank, trust company or other
nominee if such stockholder desires to tender such Shares.
 
    Any stockholder who desires to tender such stockholder's Shares and whose
certificates representing such Shares are not immediately available or who
cannot comply with the procedures for book-entry transfer on a timely basis may
tender such Shares by following the procedures for guaranteed delivery set forth
in Section 3.
 
    Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
set forth on the back cover of this Offer to Purchase. Additional copies of this
Offer to Purchase, the Letter of Transmittal, the Notice of Guaranteed Delivery
and other related materials may be obtained from the Information Agent or from
brokers, dealers, commercial banks and trust companies.
                              -------------------
 
                      The Dealer Manager for the Offer is:
 
                              SALOMON BROTHERS INC
 
March 3, 1995
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE><CAPTION>
                                                                                           PAGE
                                                                                           ----
<C>       <S>                                                                              <C>
Introduction............................................................................     1
      1.  Terms of the Offer............................................................     2
      2.  Acceptance for Payment and Payment............................................     3
      3.  Procedures for Tendering Shares...............................................     4
      4.  Withdrawal Rights.............................................................     7
      5.  Certain Tax Consequences......................................................     7
      6.  Price Range of Shares; Dividends..............................................     8
      7.  Certain Information Concerning the Company....................................     9
      8.  Certain Information Concerning the Purchaser and YPF..........................    12
      9.  Source and Amount of Funds....................................................    15
     10.  Background of the Offer; Past Contacts, Transactions or Negotiations with the
          Company.......................................................................    18
     11.  Purpose of the Offer; the Merger; Merger Agreement; Plans for the Company.....    18
     12.  Effect of the Offer on the Market for Shares; Stock Exchange Listing;
            Registration Under the Exchange Act.........................................    25
     13.  Dividends and Distributions...................................................    26
     14.  Conditions to the Offer.......................................................    27
     15.  Certain Legal Matters; Required Regulatory Approvals..........................    29
     16.  Fees and Expenses.............................................................    31
     17.  Miscellaneous.................................................................    31
Schedule I--Directors and Executive Officers of YPF and the Purchaser...................   I-1
</TABLE>
 
                                       i
<PAGE>
To Holders of Common Stock of
MAXUS ENERGY CORPORATION
 
INTRODUCTION
 
    YPF Acquisition Corp., a Delaware corporation (the "Purchaser") and a wholly
owned subsidiary of YPF Sociedad Anonima, a sociedad anonima organized under the
laws of the Republic of Argentina ("YPF"), hereby offers to purchase all
outstanding shares of common stock, par value $1.00 per share (the "Shares"), of
Maxus Energy Corporation, a Delaware corporation (the "Company"), at $5.50 per
Share, net to the seller in cash, without interest thereon, upon the terms and
subject to the conditions set forth in this Offer to Purchase and in the related
Letter of Transmittal (which together constitute the "Offer").
 
    Tendering stockholders will not be obligated to pay brokerage commissions
or, except as set forth in Instruction 6 of the Letter of Transmittal, transfer
taxes on the purchase of Shares by the Purchaser pursuant to the Offer. However,
any tendering stockholder or other payee who fails to complete and sign the
Substitute Form W-9 that is included in the Letter of Transmittal may be subject
to a required backup federal income tax withholding of 31% of the gross proceeds
payable to such stockholder or other payee pursuant to the Offer. See Section 3.
The Purchaser will pay all charges and expenses of Salomon Brothers Inc
("Salomon Brothers"), which is acting as Dealer Manager for the Offer (in such
capacity, the "Dealer Manager"), D.F. King & Co., Inc., which is acting as the
Information Agent (the "Information Agent"), and The Chase Manhattan Bank
(National Association), which is acting as the Depositary (the "Depositary"),
incurred in connection with the Offer. See Section 16.
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (1) THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN BY THE EXPIRATION DATE (AS HEREINAFTER DEFINED) A
NUMBER OF SHARES WHICH REPRESENTS NOT LESS THAN A MAJORITY OF THE COMPANY'S
VOTING SHARES OUTSTANDING ON A FULLY DILUTED BASIS AND (2) FINANCING HAVING
OCCURRED UNDER THE LOAN AGREEMENT CONTEMPLATED BY THE BANK COMMITMENT LETTER
RECEIVED BY YPF. SEE SECTIONS 1, 14 AND 15.
 
    THE BOARD OF DIRECTORS OF THE COMPANY HAS DETERMINED THAT THE OFFER AND THE
MERGER ARE IN THE BEST INTERESTS OF THE COMPANY AND ITS STOCKHOLDERS AND
RECOMMENDS THAT HOLDERS OF SHARES OF COMMON STOCK ACCEPT THE OFFER AND TENDER
THEIR SHARES PURSUANT TO THE OFFER.
 
    THE BOARD OF DIRECTORS OF THE COMPANY HAS RECEIVED THE OPINION OF CS FIRST
BOSTON CORPORATION, THE COMPANY'S FINANCIAL ADVISOR, THAT THE CONSIDERATION TO
BE RECEIVED BY THE HOLDERS OF SHARES OF COMMON STOCK PURSUANT TO THE OFFER AND
THE MERGER IS FAIR TO SUCH HOLDERS FROM A FINANCIAL POINT OF VIEW.
 
    The Offer is being made pursuant to the Agreement of Merger, dated as of
February 28, 1995 (the "Merger Agreement"), among YPF, the Purchaser and the
Company, pursuant to which, as promptly as practicable following the later of
the Expiration Date and the satisfaction or waiver of certain conditions, the
Purchaser will be merged with and into the Company (the "Merger"), with the
result that all of the outstanding common stock of the Company will be
beneficially owned by YPF. At the effective time of the Merger, each
then-outstanding Share (other than Shares held by YPF, the Purchaser or any of
their subsidiaries, or in the treasury of the Company, all of which will be
cancelled, and Shares held by stockholders who perfect their appraisal rights
under Delaware law) will be converted into the right to receive $5.50 per Share
in cash or any higher price per Share paid pursuant to the Offer. See Section
12.
 
    The Purchaser has been advised by the Company that, to the Company's
knowledge, all of the Company's directors and executive officers currently
intend to tender all Shares owned by them pursuant to the Offer.

<PAGE>

    According to the Company, as of February 23, 1995, there were (i)
135,497,705 Shares outstanding, (ii) 8,000,000 warrants outstanding, each
representing the right to purchase from the Company on or prior to October 10,
1997, one Share at a price of $13.00 per Share, (iii) 4,358,658 shares of $4.00
Preferred Stock ("$4.00 Preferred Stock") outstanding, each convertible into
2.29751 Shares (and, together with the Shares, the "Voting Shares"), and (iv)
875,000 shares of $9.75 Cumulative Convertible Preferred Stock ("$9.75 Preferred
Stock") outstanding, each convertible into 9.04 Shares.
 
    The Company's preferred share purchase rights (the "Rights"), issued
pursuant to the Rights Agreement, dated as of September 2, 1988, between the
Company and Ameritrust Company National Association, as Rights Agent (the
"Rights Agreement"), are evidenced by the certificates representing Shares. In
the Merger Agreement, the Company agreed to take the steps necessary to redeem
the Rights so that the Rights issued pursuant to the Rights Agreement will not
become exercisable as a result of the consummation of the transactions
contemplated in the Merger Agreement. The Purchaser announced on March 1, 1995
that the Board of Directors of the Company had taken all necessary action to
redeem the Rights effective as of March 22, 1995, and that holders of record of
Shares on such date will be entitled to receive the redemption price therefor
($0.10 per Right). See Section 1 and Section 7.
 
    THIS OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION WHICH STOCKHOLDERS SHOULD READ CAREFULLY BEFORE ANY
DECISION IS MADE WITH RESPECT TO THE OFFER.
 
    1. TERMS OF THE OFFER. Upon the terms and subject to the conditions of the
Offer (including, if the Offer is extended or amended, the terms and conditions
of any extension or amendment), the Purchaser will accept for payment and pay
for all Shares which are validly tendered prior to the Expiration Date and not
withdrawn in accordance with Section 4. The term "Expiration Date" means 12:00
midnight, New York City time, on Thursday, March 30, 1995 unless and until the
Purchaser (subject to the terms of the Merger Agreement) shall have extended the
period of time during which the Offer is open, in which event the term
"Expiration Date" shall refer to the latest time and date at which the Offer, as
so extended by the Purchaser, shall expire.
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THE SATISFACTION OF THE
MINIMUM SHARE CONDITION AND THE FINANCING CONDITION. The "Minimum Share
Condition" is the condition to the Offer that the number of Shares being validly
tendered and not withdrawn prior to the Expiration Date, when added to the
Shares and $4.00 Preferred Stock, beneficially owned by YPF and the Purchaser
represents not less than a majority of the Voting Shares outstanding on a Fully
Diluted Basis. "Fully Diluted Basis" means the number of Voting Shares
outstanding as of the close of business on February 23, 1995, increased by the
number of Voting Shares (i) issued between such date and the Expiration Date,
and (ii) issuable pursuant to the exercise of rights (other than the Rights) to
purchase Voting Shares or upon conversion or exchange of other securities;
reduced, however, by the number (if any) of employee stock options ("Company
Options") and other rights cancelled as described in the Merger Agreement. The
"Financing Condition" is the condition to the Offer that financing shall have
occurred under the loan agreement contemplated by the bank commitment letter
received by YPF. See Section 14 which sets forth the conditions to the Offer. If
any condition to the Purchaser's obligation to purchase Shares under the Offer
is not satisfied prior to the Expiration Date, the Purchaser reserves the right
(but shall not be obligated) to (i) decline to purchase any of the Shares
tendered and terminate the Offer, (ii) waive such unsatisfied condition, subject
to the terms of the Merger Agreement and to compliance with applicable rules and
regulations of the Securities and Exchange Commission (the "Commission"), and
purchase all Shares validly tendered, (iii) extend the Offer and, subject to the
right of stockholders to withdraw Shares as provided in Section 4, retain the
Shares which have been tendered during the period or periods for which the Offer
is extended, or (iv) subject to the terms of the Merger Agreement, amend the
Offer.
 
    The Merger Agreement provides that the Purchaser reserves the right to
increase the price per Share payable in the Offer or to otherwise amend the
Offer; provided, however, that without the consent of the Company, the Purchaser
shall make no amendment that decreases the price per Share payable in
 
                                       2
<PAGE>

the Offer, reduces the minimum number of Shares to be purchased in the Offer,
imposes additional conditions to the Offer, or makes any other change in the
terms and conditions of the Offer that is materially adverse to the holders of
the Shares. Subject to the foregoing, the Purchaser expressly reserves the
right, at any time or from time to time, subject to the terms of the Merger
Agreement and regardless of whether or not any of the events set forth in
Section 14 shall have occurred or shall have been determined by the Purchaser to
have occurred, (i) to extend the period of time during which the Offer is open
and thereby delay acceptance for payment of, and the payment for, any Shares, by
giving oral or written notice of such extension to the Depositary, and (ii) to
amend the Offer in any respect by giving oral or written notice of such
amendment to the Depositary. The rights reserved by the Purchaser in this
paragraph are in addition to the Purchaser's rights to terminate the Offer
described in Section 14. There can be no assurance, however, that the Purchaser
will exercise its rights to extend the Offer. Any extension, amendment or
termination will be followed as promptly as practicable by public announcement
thereof, the announcement in the case of an extension to be issued no later than
9:00 a.m., New York City time, on the next business day after the previously
scheduled Expiration Date in accordance with the announcement requirements of
Rule 14d-4(c) under the Securities Exchange Act of 1934, as amended (the
"Exchange Act"). Without limiting the obligation of the Purchaser under such
Rule or the manner in which the Purchaser may choose to make any public
announcement, the Purchaser currently intends to make announcements by issuing a
release to the Dow Jones News Service.
 
    If the Purchaser extends the Offer, or if the Purchaser (whether before or
after its acceptance for payment of Shares) is delayed in its purchase of or
payment for Shares or is unable to pay for Shares pursuant to the Offer for any
reason, then, without prejudice to the Purchaser's rights under the Offer, the
Depositary may retain tendered Shares on behalf of the Purchaser, and such
Shares may not be withdrawn except to the extent tendering stockholders are
entitled to withdrawal rights as described in Section 4. However, the ability of
the Purchaser to delay the payment for Shares which the Purchaser has accepted
for payment is limited by Rule 14e-1(c) under the Exchange Act, which requires
that a bidder pay the consideration offered or return the securities deposited
by or on behalf of holders of securities promptly after the termination or
withdrawal of the Offer.
 
    If the Purchaser makes a material change in the terms of the Offer or the
information concerning the Offer or waives a material condition of the Offer,
the Purchaser will disseminate additional tender offer materials and extend the
Offer to the extent required by Rules 14d-4(c), 14d-6(d) and 14e-1 under the
Exchange Act. The minimum period during which the Offer must remain open
following material changes in the terms of the Offer or information concerning
the Offer, other than a change in price or a change in percentage of securities
sought, will depend upon the facts and circumstances, including the relative
materiality of the terms or information. With respect to a change in price or a
change in percentage of securities sought, a minimum period of ten business days
is required to allow for adequate dissemination to stockholders and investor
response. If prior to the Expiration Date, the Purchaser should decide to
increase the price per Share being offered in the Offer, such increase will be
applicable to all stockholders whose Shares are accepted for payment pursuant to
the Offer. As used in this Offer to Purchase, "business day" has the meaning set
forth in Rule 14d-1 under the Exchange Act.
 
    The Company has provided to the Purchaser its list of stockholder and
security position listings for the purpose of disseminating the Offer to holders
of Shares. This Offer to Purchase and the related Letter of Transmittal and
other relevant materials will be mailed to record holders of Shares and
furnished to brokers, dealers, commercial banks, trust companies and similar
persons whose names, or the names of whose nominees, appear on the stockholder
list or, if applicable, who are listed as participants in a clearing agency's
security position listing, for subsequent transmittal to beneficial owners of
Shares.
 
    2. ACCEPTANCE FOR PAYMENT AND PAYMENT. Upon the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms and conditions of any extension or amendment), the Purchaser will
purchase, by accepting for payment, and will pay for, all Shares validly
 
                                       3
<PAGE>
tendered prior to the Expiration Date (and not properly withdrawn in accordance
with Section 4) promptly after the Expiration Date. Any determination concerning
the satisfaction of such terms and conditions shall be within the sole
discretion of the Purchaser. See Section 14. The Purchaser expressly reserves
the right to delay acceptance for payment of, or, subject to Rule 14e-1(c) under
the Exchange Act, payment for, Shares in order to comply, in whole or in part,
with any applicable law, including the Hart-Scott-Rodino Antitrust Improvements
Act of 1976, as amended (the "HSR Act"). See Sections 14 and 15.
 
    In all cases, payment for Shares purchased pursuant to the Offer will be
made only after timely receipt by the Depositary of (i) certificates for such
Shares or timely confirmation of book-entry transfer (a "Book-Entry
Confirmation") of such Shares into the Depositary's account at The Depository
Trust Company, the Midwest Securities Trust Company or the Philadelphia
Depository Trust Company (each, a "Book-Entry Transfer Facility") pursuant to
the procedures set forth in Section 3, (ii) a properly completed and duly
executed Letter of Transmittal (or facsimile thereof), or an Agent's Message (as
defined below) in connection with a book-entry transfer, and (iii) any other
documents required by the Letter of Transmittal.
 
    The term "Agent's Message" means a message, transmitted by a Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that such Book-Entry Transfer Facility has
received an express acknowledgement from the participant in such Book-Entry
Transfer Facility tendering the Shares which are the subject of such Book-Entry
Confirmation, that such participant has received and agrees to be bound by the
terms of the Letter of Transmittal and that the Purchaser may enforce such
agreement against such participant.
 
    For purposes of the Offer, the Purchaser will be deemed to have accepted for
payment (and thereby purchased) tendered Shares, if, as and when the Purchaser
gives oral or written notice to the Depositary of the Purchaser's acceptance of
such Shares for payment pursuant to the Offer. In all cases, payment for Shares
purchased pursuant to the Offer will be made by deposit of the purchase price
with the Depositary, which will act as agent for tendering stockholders for the
purpose of receiving payment from the Purchaser and transmitting payment to
tendering stockholders. Under no circumstances will interest on the purchase
price of the Shares be paid by the Purchaser.
 
    If any tendered Shares are not purchased pursuant to the Offer for any
reason, or if certificates submitted represent more Shares than are tendered,
certificates for such Shares not purchased or tendered will be returned, without
expense to the tendering stockholder (or, in the case of Shares tendered by
book-entry transfer into the Depositary's account at a Book-Entry Transfer
Facility pursuant to the procedures set forth in Section 3, such Shares will be
credited to an account maintained at such Book-Entry Transfer Facility),
promptly after the expiration, termination or withdrawal of the Offer.
 
    3. PROCEDURES FOR TENDERING SHARES. For Shares to be validly tendered
pursuant to the Offer, a properly completed and duly executed Letter of
Transmittal or facsimile thereof, with any required signature guarantees, or an
Agent's Message in connection with a book-entry delivery of Shares, and any
other required documents, must be received by the Depositary at one of its
addresses set forth on the back cover of this Offer to Purchase prior to the
Expiration Date. In addition, either (i) the certificates for Shares must be
received by the Depositary along with the Letter of Transmittal or Shares must
be tendered pursuant to the procedures for book-entry transfer described below
and a Book-Entry Confirmation must be received by the Depositary, in each case
prior to the Expiration Date, or (ii) the tendering stockholder must comply with
the guaranteed delivery procedures described below.
 
    The Depositary will establish an account with respect to the Shares at each
Book-Entry Transfer Facility for purposes of the Offer within two business days
after the date of this Offer to Purchase. Any financial institution that is a
participant in any of the Book-Entry Transfer Facilities' systems may make
book-entry delivery of Shares by causing a Book-Entry Transfer Facility to
transfer such Shares
 
                                       4
<PAGE>
into the Depositary's account at a Book-Entry Transfer Facility in accordance
with such Book-Entry Transfer Facility's procedures for transfer. However,
although delivery of Shares may be effected through book-entry transfer at a
Book-Entry Transfer Facility, the Letter of Transmittal or facsimile thereof,
properly completed and duly executed, with any required signature guarantees, or
an Agent's Message in connection with a book-entry transfer, and any other
required documents, must, in any case, be transmitted to and received by the
Depositary at one of its addresses set forth on the back cover of this Offer to
Purchase prior to the Expiration Date or the tendering stockholder must comply
with the guaranteed delivery procedures described below. DELIVERY OF DOCUMENTS
TO A BOOK-ENTRY TRANSFER FACILITY IN ACCORDANCE WITH THE BOOK-ENTRY TRANSFER
FACILITY'S PROCEDURES DOES NOT CONSTITUTE DELIVERY TO THE DEPOSITARY.
 
    Signatures on all Letters of Transmittal must be guaranteed by a member firm
of a registered national securities exchange, a member of the National
Association of Securities Dealers, Inc. ("NASD") or a commercial bank or trust
company having an office or correspondent in the United States (each of the
foregoing being referred to as an "Eligible Institution"), unless the Shares
tendered thereby are tendered (i) by a registered holder of Shares who has not
completed either the box entitled "Special Delivery Instructions" or the box
entitled "Special Payment Instructions" on the Letter of Transmittal, or (ii)
for the account of an Eligible Institution. See Instruction 1 of the Letter of
Transmittal. If the certificates are registered in the name of a person other
than the signer of the Letter of Transmittal or if payment is to be made or
certificates for Shares not accepted for payment or not tendered are to be
returned to a person other than the registered holder, then the tendered
certificates must be endorsed or accompanied by appropriate stock powers, in
either case signed exactly as the name or names of the registered owner or
owners appear on the certificates, with the signatures on the certificates or
stock powers guaranteed as described above. See Instructions 1 and 5 of the
Letter of Transmittal.
 
    THE METHOD OF DELIVERY OF SHARES, THE LETTER OF TRANSMITTAL (OR A MANUALLY
SIGNED FACSIMILE THEREOF) AND ANY OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY
THROUGH A BOOK-ENTRY TRANSFER FACILITY, IS AT THE OPTION AND RISK OF THE
TENDERING STOCKHOLDER. IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN
RECEIPT REQUESTED, PROPERLY INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT
TIME SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.
 
    If a stockholder desires to tender Shares pursuant to the Offer and such
stockholder's certificates for Shares are not immediately available or time will
not permit all required documents to reach the Depositary on or prior to the
Expiration Date, or the procedure for book-entry transfer cannot be completed on
a timely basis, such Shares may nevertheless be tendered if all the following
conditions are satisfied:
 
        (i) the tender is made by or through an Eligible Institution;
 
        (ii) a properly completed and duly executed Notice of Guaranteed
    Delivery, substantially in the form provided by the Purchaser herewith, is
    received by the Depositary as provided below, on or prior to the Expiration
    Date as provided below; and
 
        (iii) the certificates for all tendered Shares, in proper form for
    transfer (or a Book-Entry Confirmation), together with a Letter of
    Transmittal or facsimile thereof, properly completed and duly executed, with
    any required signature guarantees (or, in the case of a book-entry transfer,
    an Agent's Message) and any other documents required by the Letter of
    Transmittal are received by the Depositary within five New York Stock
    Exchange, Inc. ("NYSE") trading days after the date of execution of such
    Notice of Guaranteed Delivery. Stockholders may not extend the foregoing
    time period for delivery of Shares to the Depositary by providing a second
    Notice of Guaranteed Delivery with respect to such Shares.
 
                                       5
<PAGE>
    The Notice of Guaranteed Delivery may be sent by hand delivery, telegram,
telex, facsimile transmission or mail to the Depositary and must include a
guarantee by an Eligible Institution in the form set forth in the Notice of
Guaranteed Delivery.
 
    Notwithstanding any other provision hereof, payment for Shares purchased
pursuant to the Offer will in all cases be made only after timely receipt by the
Depositary of certificates for the Shares or a timely Book-Entry Confirmation of
the delivery of such Shares, and a Letter of Transmittal (or manually signed
facsimile thereof), properly completed and duly executed, with any required
signature guarantees (or, in the case of a book-entry transfer, an Agent's
Message) and any other documents required by the Letter of Transmittal.
Accordingly, payment might not be made to all tendering stockholders at the same
time, and will depend upon when certificates for the Shares or Book-Entry
Confirmations of the delivery of such Shares are received into the Depositary's
account at a Book-Entry Transfer Facility.
 
    UNDER THE BACKUP FEDERAL INCOME TAX LAWS APPLICABLE TO CERTAIN STOCKHOLDERS
(OTHER THAN CERTAIN EXEMPT STOCKHOLDERS, INCLUDING, AMONG OTHERS, ALL
CORPORATIONS AND CERTAIN FOREIGN INDIVIDUALS), THE DEPOSITARY MAY BE REQUIRED TO
WITHHOLD 31% OF THE AMOUNT OF ANY PAYMENTS MADE TO SUCH STOCKHOLDERS PURSUANT TO
THE OFFER. TO PREVENT BACKUP FEDERAL INCOME TAX WITHHOLDING WITH RESPECT TO
PAYMENT OF THE PURCHASE PRICE FOR SHARES PURCHASED PURSUANT TO THE OFFER, A
TENDERING STOCKHOLDER MUST PROVIDE THE DEPOSITARY WITH SUCH STOCKHOLDER'S
CORRECT TAXPAYER IDENTIFICATION NUMBER AND CERTIFY THAT SUCH STOCKHOLDER IS NOT
SUBJECT TO BACKUP FEDERAL INCOME TAX WITHHOLDING BY COMPLETING THE SUBSTITUTE
FORM W-9 INCLUDED IN THE LETTER OF TRANSMITTAL. SEE INSTRUCTION 9 TO THE LETTER
OF TRANSMITTAL.
 
    All questions as to the validity, form, eligibility (including time of
receipt) and acceptance for payment of any tendered Shares pursuant to any of
the procedures described above will be determined in the sole discretion of the
Purchaser, whose determination shall be final and binding. The Purchaser
reserves the absolute right to reject any or all tenders of any Shares
determined by it not to be in proper form if the acceptance for payment of, or
payment for, such Shares may, in the opinion of the Purchaser's counsel, be
unlawful. The Purchaser also reserves the absolute right, in its sole
discretion, subject to the Merger Agreement, to waive any of the conditions of
the Offer or any defect or irregularity in any tender with respect to Shares of
any particular stockholder, whether or not similar defects or irregularities are
waived in the case of other stockholders. The Purchaser's interpretation of the
terms and conditions of the Offer (including the Letter of Transmittal and the
Instructions thereto) will be final and binding. Neither the Purchaser, YPF, the
Company, the Depositary, the Information Agent, the Dealer Manager nor any other
person or entity will be under any duty to give notification of any defects or
irregularities in tenders or will incur any liability for failure to give any
such notification.
 
    By executing a Letter of Transmittal or by causing the transmission of an
Agent's Message as set forth above, a tendering stockholder irrevocably appoints
designees of the Purchaser as the stockholder's attorneys-in-fact and proxies,
in the manner set forth in the Letter of Transmittal, each with full power of
substitution, to the full extent of the stockholder's rights with respect to the
Shares tendered by the stockholder and accepted for payment by the Purchaser
(and any and all other Shares or other securities issued or issuable in respect
of such Shares on or after the date of the Merger Agreement). All such powers of
attorney and proxies shall be considered to be coupled with an interest in the
tendered Shares. This appointment will be effective when, and only to the extent
that, the Purchaser accepts Shares for payment. Upon acceptance for payment, all
prior powers of attorney and proxies given by the stockholder with respect to
the Shares or other securities will, without further action, be revoked, and no
subsequent powers of attorney proxies may be given nor any subsequent written
consent executed by such stockholder (and, if given or executed, will not be
deemed to be effective) with respect thereto. The designees of the Purchaser
will, with respect to the Shares and other securities, be empowered to exercise
all voting and other rights of such stockholder as they in their sole discretion
may deem proper at any annual, special or adjourned meeting of the Company's
stockholders, by written consent or otherwise. The Purchaser reserves the right
to require that, in order for Shares to
 
                                       6
<PAGE>
be deemed validly tendered, immediately upon the Purchaser's acceptance for
payment of such Shares, the Purchaser must be able to exercise full voting and
other rights of a record and beneficial holder, including rights in respect of
acting by written consent, with respect to such Shares.
 
    A tender of Shares pursuant to any one of the procedures described above
will constitute the tendering stockholder's acceptance of the terms and
conditions of the Offer. The Purchaser's acceptance for payment for Shares
tendered pursuant to the Offer will constitute a binding agreement between the
tendering stockholder and the Purchaser upon the terms and subject to the
conditions of the Offer.
 
    4. WITHDRAWAL RIGHTS. Except as otherwise provided in this Section 4,
tenders of Shares made pursuant to the Offer are irrevocable. Shares tendered
pursuant to the Offer may be withdrawn at any time prior to the Expiration Date
and, unless theretofore accepted for payment by the Purchaser pursuant to the
Offer, may also be withdrawn at any time after May 2, 1995 (or such later date
as may apply in case the Offer is extended).
 
    For a withdrawal to be effective, a written, telegraphic, telex or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of this Offer to Purchase. Any
such notice of withdrawal must specify the name of the person who tendered the
Shares to be withdrawn, the number of Shares to be withdrawn and the name of the
registered holder, if different from that of the person who tendered such
Shares. If certificates for Shares have been delivered or otherwise identified
to the Depositary, then, prior to the release of such certificates, the serial
numbers of the particular certificates evidencing the Shares to be withdrawn and
a signed notice of withdrawal with signatures guaranteed by an Eligible
Institution, except in the case of Shares tendered for account of an Eligible
Institution, must also be furnished to the Depositary as described above. If
Shares have been tendered pursuant to the procedures for book-entry transfer as
set forth in Section 3, any notice of withdrawal must also specify the name and
number of the account at the appropriate Book-Entry Transfer Facility to be
credited with the withdrawn Shares.
 
    ALL QUESTIONS AS TO THE FORM AND VALIDITY (INCLUDING TIME OF RECEIPT) OF
NOTICES OF WITHDRAWAL WILL BE DETERMINED BY THE PURCHASER, IN ITS SOLE
DISCRETION, WHOSE DETERMINATION WILL BE FINAL AND BINDING. NEITHER THE
PURCHASER, YPF, THE COMPANY, THE DEALER MANAGER, THE DEPOSITARY, THE INFORMATION
AGENT NOR ANY OTHER PERSON OR ENTITY WILL BE UNDER ANY DUTY TO GIVE NOTIFICATION
OF ANY DEFECTS OR IRREGULARITIES IN ANY NOTICE OF WITHDRAWAL OR INCUR ANY
LIABILITY FOR FAILURE TO GIVE ANY NOTIFICATION.
 
    Any Shares properly withdrawn will be deemed to be not validly tendered for
purposes of the Offer. However, withdrawn Shares may be retendered by following
one of the procedures described in Section 3 at any time prior to the Expiration
Date.
 
    5. CERTAIN TAX CONSEQUENCES. The receipt of cash for Shares pursuant to the
Offer (or the Merger) will be a taxable transaction for federal income tax
purposes and may also be a taxable transaction under applicable state, local or
foreign tax laws. The tax consequences of such receipt pursuant to the Offer (or
the Merger) may vary depending upon, among other things, the particular
circumstances of the stockholder. In general, a stockholder who receives cash
for Shares pursuant to the Offer (or the Merger) will recognize gain or loss for
federal income tax purposes equal to the difference between the amount of cash
received in exchange for the Shares sold and such stockholder's adjusted tax
basis in such Shares. Provided that the Shares constitute capital assets in the
hands of the stockholder, such gain or loss will be capital gain or loss, and
will be long term capital gain or loss if the holder has held the Shares for
more than one year at the time of sale. Gain or loss will be calculated
separately for each block of Shares tendered pursuant to the Offer.
 
    The foregoing discussion may not be applicable to certain types of
stockholders, including stockholders who acquired Shares pursuant to the
exercise of employee stock options or otherwise as compensation, individuals who
are not citizens or residents of the United States, foreign corporations
 
                                       7
<PAGE>
and entities that are otherwise subject to special tax treatment under the
Internal Revenue Code of 1986, as amended (the "Internal Revenue Code"), such as
insurance companies, tax-exempt entities and regulated investment companies.
 
    The federal income tax discussion set forth above is included for general
information only and is based upon present law. Stockholders are urged to
consult their tax advisors with respect to the specific tax consequences of the
Offer and the Merger to them, including the application and effect of the
alternative minimum tax, and state, local and foreign tax laws.
 
    6. PRICE RANGE OF SHARES; DIVIDENDS. The Shares are listed and principally
traded in the United States on the NYSE and the Pacific Stock Exchange under the
symbol "MXS". The following table sets forth, for the calendar quarters
indicated, the high and low sales price per Share on the NYSE Composite Tape.
The Company did not pay a dividend on the Shares in 1992, 1993 or 1994. All
prices set forth below are as reported in published financial sources:
 
<TABLE><CAPTION>
                                                                     HIGH            LOW
                                                                 ------------    -----------
1992
<S>                                                              <C>             <C>
  First Quarter...............................................          8 1/4          5 3/4
  Second Quarter..............................................          7 1/4          5 5/8
  Third Quarter...............................................          7 3/8          5 1/2
  Fourth Quarter..............................................          7 1/2          6 1/4
 
1993
  First Quarter...............................................          9 3/4          6 1/8
  Second Quarter..............................................         10 3/8          8 3/8
  Third Quarter...............................................          9 3/4          7 3/8
  Fourth Quarter..............................................          7 3/8          4 1/2
 
1994
  First Quarter...............................................          5 7/8          4 1/8
  Second Quarter..............................................          5 1/4          4 1/8
  Third Quarter...............................................          5 7/8          4 1/2
  Fourth Quarter..............................................          4 3/4          3 1/4
 
1995
  First Quarter (through February 27).........................          4 1/4          3
</TABLE>
 
    On February 27, 1995, the last full trading day prior to the announcement of
the Merger Agreement, the reported closing sales price per Share on the NYSE
Composite Tape was $3 3/4. On March 2, 1995, the last full trading day prior to
the commencement of the Offer, the reported closing sales price per Share on the
NYSE Composite Tape was $5 7/16. Stockholders are urged to obtain a current
market quotation for the Shares.
 
                                       8
<PAGE>
    7. CERTAIN INFORMATION CONCERNING THE COMPANY.
 
    General. The Company is a Delaware corporation with its principal executive
offices located at 717 North Harwood Street, Dallas, Texas 75201. According to
the Company's Annual Report on Form 10-K for the fiscal year ended December 31,
1993 (the "Company 10-K"), the Company was incorporated to hold the stock of
various corporations, the oldest of which was founded in 1910. The Company,
together with its subsidiaries, is one of the largest independent oil and gas
exploration and production companies in the United States, with ongoing
international activity in Indonesia and a number of other countries, and
domestic activity primarily in the Mid-Continent region of the United States.
 
    Selected Consolidated Financial Data. With the exception of the 1994
year-end results, the following selected consolidated financial data relating to
the Company have been taken or derived from the audited financial statements
contained in the Company 10-K. More comprehensive financial information
(including the notes to the Company's financial statements) is included in such
Company 10-K and other documents filed by the Company with the Commission, and
the financial data set forth below are qualified in their entirety by reference
to such reports and other documents, including the financial statements (and
notes thereto) contained therein. Such reports and other documents may be
examined and copies may be obtained from the offices of the Commission in the
manner set forth below. The 1994 year-end results, which are derived from the
Company's earnings press release dated February 8, 1995, are unaudited.
 
                                       9
<PAGE>
                            MAXUS ENERGY CORPORATION
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
                      (IN MILLIONS, EXCEPT PER SHARE DATA)
<TABLE><CAPTION>
                                                                          YEAR ENDED
                                                                         DECEMBER 31,
                                                           -----------------------------------------
                                                              1994         1993      1992      1991
                                                           -----------    ------    ------    ------
                                                           (UNAUDITED)
<S>                                                        <C>            <C>       <C>       <C>
Revenues:
  Sales and operating revenues..........................     $ 682.1      $786.7    $718.4    $790.8
  Settlement of litigation..............................         0.8         6.8     120.8
  Other revenues, net...................................         8.2        13.5      11.9      12.2
                                                           -----------    ------    ------    ------
                                                               691.1       807.0     851.1     803.0
Costs and Expenses:
  Operating expenses....................................       232.7       255.6     232.4     230.1
  Gas purchase costs....................................       116.9       155.6      65.5      44.3
  Exploration, including exploratory dry holes..........        32.6        56.8      64.6      66.5
  Depreciation, depletion and amortization..............       140.2       153.6     174.4     203.6
  General and administrative expenses...................        35.4        34.8      34.7      34.1
  Taxes other than income taxes.........................        12.9        15.9      15.9      17.1
  Interest and debt expenses............................        96.7        88.4      86.9      88.4
  Environmental studies and remediation.................        60.5
  Restructuring:
    Gain on sale of assets..............................      (201.9)
    Restructuring costs.................................       100.9
                                                           -----------    ------    ------    ------
                                                               626.9       760.7     674.4     684.1
                                                           -----------    ------    ------    ------
Income Before Income Taxes, Extraordinary Item
  and Cumulative Effect of Change in Accounting
Principles..............................................        64.2        46.3     176.7     118.9
Income Taxes............................................        86.9        84.2     102.5     130.1
                                                           -----------    ------    ------    ------
Net Income (Loss) Before Extraordinary Item
  and Cumulative Effect of Change in Accounting
Principle...............................................       (22.7)      (37.9)     74.2     (11.2)
  Extraordinary item....................................                    (7.1)
  Cumulative effect of change in accounting
    principle...........................................       (22.7)       (4.4)
                                                           -----------    ------    ------    ------
Net Income (Loss).......................................                   (49.4)     74.2     (11.2)
  Dividend requirement on Preferred Stock...............       (43.6)      (41.7)    (41.7)    (41.7)
                                                           -----------    ------    ------    ------
Income (Loss) Applicable to Common Shares...............     $ (66.3)     $(91.1)   $ 32.5    $(52.9)
                                                           -----------    ------    ------    ------
                                                           -----------    ------    ------    ------
Income (Loss) Before Extraordinary Item and Cumulative
Effect of Change in Accounting Principle................     $  (.49)     $ (.60)   $  .27    $ (.52)
  Extraordinary item....................................                    (.05)
  Cumulative effect of change in accounting
    principle...........................................                    (.03)
                                                           -----------    ------    ------    ------
Net Income (Loss) Per Common Share......................     $  (.49)     $ (.68)   $  .27    $ (.52)
                                                           -----------    ------    ------    ------
                                                           -----------    ------    ------    ------
Average Common Shares Outstanding.......................       134.9       133.9     119.6     100.8
</TABLE>
 
                                       10
<PAGE>
                            MAXUS ENERGY CORPORATION
                        CONSOLIDATED BALANCE SHEET DATA
                                 (IN MILLIONS)
 
<TABLE><CAPTION>
                                            SEPTEMBER 31, 1994    DECEMBER 31, 1993
                                            ------------------    -----------------
<S>                                         <C>                   <C>
Total current assets.....................        $  448.5             $   404.7
Total assets.............................         1,703.1               1,987.4
Total current liabilities................           177.5                 263.4
Long-term debt...........................           977.8               1,015.4
Total stockholders' equity...............           119.3                 147.9
</TABLE>
 
    The Company is subject to the information and filing requirements of the
Exchange Act and is required to file periodic reports, proxy statements and
other information with the Commission relating to its business, financial
condition and other matters. Information, as of particular dates, concerning the
Company's directors and officers, their remuneration, options granted to them,
the principal holders of the Company's securities and any material interest of
such persons in transactions with the Company is required to be described in
proxy statements distributed to the Company's stockholders and filed with the
Commission. These reports, proxy statements and other information should be
available for inspection and copying at the Commission's principal office at 450
Fifth Street, N.W., Washington, D.C. 20549, and at the regional offices of the
Commission located at Seven World Trade Center, 13th Floor, New York, New York
10048 and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661. Copies of these materials may also be obtained by mail, upon
payment of the Commission's customary fees, from the Commission's principal
office at 450 Fifth Street, N.W., Washington, D.C. 20549. Such material should
also be available for inspection at the library of the NYSE, 20 Broad Street,
New York, New York 10005.
 
    Other than as set forth below, the information concerning the Company
contained in this section has been taken from or based upon publicly available
documents on file with the Commission and other publicly available information.
Although neither the Purchaser nor YPF has any knowledge that would indicate
that statements contained herein based upon such documents are untrue, neither
the Purchaser nor YPF takes any responsibility for the accuracy or completeness
of the information contained in such documents or for any failure by the Company
to disclose events that may have occurred and may affect the significance or
accuracy of any such information but which are unknown to either the Purchaser
or YPF.
 
    YPF and the Company engaged in preliminary discussions concerning a variety
of possible transactions and transaction structures involving a possible
alignment of the businesses of both the Company and YPF. YPF has conducted a
financial due diligence investigation, and the Company and its representatives
discussed with YPF and its representatives certain matters regarding the
business and financial condition of the Company. See "Background of the Offer;
Past Contacts; Transactions or Negotiations with the Company." The Company
provided YPF with projected financial information of the Company for the fiscal
year ending December 31, 1995. None of such projected financial information
provided by the Company to YPF is publicly available. Such information was
prepared for internal purposes. None of this information was prepared for
publication or with a view to complying with the published guidelines of the
Commission regarding projections or with the AICPA Guide for Prospective
Financial Statements, and it is being included in this Offer to Purchase solely
because it was furnished to YPF. The information necessarily reflects numerous
assumptions with respect to the oil and gas exploration and production business,
general business and economic conditions and other matters, many of which are
inherently uncertain or beyond the Company's control, and does not take into
account any change in ownership of the Company or any changes to Company
operations or capital structure which may result therefrom. It is not possible
to predict whether the assumptions made in preparing the projected financial
information will be valid and actual results may prove to be materially higher
or lower than those contained in the projections. The inclusion of this
information should not be
 
                                       11
<PAGE>
regarded as an indication that YPF, the Purchaser, the Company, the Dealer
Manager or anyone who received this information considered it a reliable
predictor of future events, and this information should not be relied on as
such. Neither YPF, the Purchaser, the Dealer Manager nor the Company assumes any
responsibility for the validity, reasonableness, accuracy or completeness of the
projected financial information, and the Company has made no representation to
YPF or the Purchaser regarding such information.
 
    Set forth below is a summary of selected income statement, cash flow and
balance sheet information which has been provided by the Company to YPF as
described above.
 
         SELECTED PROJECTED INCOME STATEMENT AND CASH FLOW INFORMATION
 
<TABLE><CAPTION>
                                                             FOR THE YEAR ENDING
                                                              DECEMBER 31, 1995
                                                                 (DOLLARS IN
                                                                  MILLIONS)
                                                             -------------------
<S>                                                          <C>
Revenues..................................................         $ 694.3
Cash operating and exploration expenses...................           389.4
Depreciation, depletion and amortization..................           135.6
Interest, administration and other expenses...............           136.8
Income taxes..............................................            72.2
Net income................................................           (39.7)
Discretionary cash flow (1)...............................           107.6
Expenditures for property, plant and equipment............           174.0
</TABLE>
 
                  SELECTED PROJECTED BALANCE SHEET INFORMATION
 
<TABLE><CAPTION>
                                                                     AT
                                                              DECEMBER 31, 1995
                                                                 (DOLLARS IN
                                                                  MILLIONS)
                                                             -------------------
<S>                                                          <C>
Current assets............................................        $   372.7
Total assets..............................................          1,604.6
Current liabilities.......................................            195.1
Total debt................................................            969.8
Stockholders' equity......................................             34.2
</TABLE>
 
- ------------
 
(1) Net income adjusted for depreciation, depletion, amortization, deferred
    taxes, other non-cash items and exploration expense, less preferred stock
    dividends.
 
    8. CERTAIN INFORMATION CONCERNING THE PURCHASER AND YPF. The Purchaser is a
newly incorporated Delaware corporation and a wholly owned subsidiary of YPF
which to date has not conducted any business other than that incident to its
formation, the execution and delivery of the Merger Agreement and the
commencement of the Offer. Accordingly, no meaningful financial information with
respect to the Purchaser is available. The principal executive offices of YPF
and the Purchaser are located at Avenida Pte. Roque Saenz Pena 777, Buenos
Aires, Argentina. YPF, a sociedad anonima organized under the laws of the
Republic of Argentina, and the largest Argentine company, is an integrated oil
and gas company engaged in the exploration, development and production of oil
and natural gas and in the refining, marketing, transportation, and distribution
of oil and a wide range of petroleum products, petroleum derivatives,
petrochemicals and liquid petroleum gas. YPF's shares are listed and traded on
the Buenos Aires Stock Exchange and American Depositary Receipts representing
its American Depositary Shares are traded on the NYSE under the symbol "YPF".
 
                                       12
<PAGE>
    The name, citizenship, business address, present principal occupation or
employment and five-year employment history of each of the directors and
executive officers of YPF and the Purchaser are set forth in Schedule I hereto.
 
    YPF is subject to the informational filing requirements of the Exchange Act
and is required to file reports and other information with the Commission
required by foreign law or otherwise under the Exchange Act relating to its
business, financial condition and other matters. However, YPF is exempt from the
rules under the Exchange Act prescribing the furnishing and content of proxy
statements and its officers, directors and principal stockholders are exempt
from the reporting and the "short-swing" profit recovery provisions contained in
Section 16 of the Exchange Act. Reports and other information may be inspected
and copies may be obtained from the offices of the Commission in the same manner
as set forth with respect to information concerning the Company in Section 7.
 
    The following selected consolidated financial data relating to YPF and its
subsidiaries have been taken or derived from the audited financial statements
contained in YPF's Annual Report on Form 20-F for the year ended December 31,
1993. Such statements were prepared in conformity with generally accepted
accounting principles in Argentina ("Argentine GAAP"). Argentine GAAP differs in
certain significant respects from generally accepted accounting principles in
the United States ("U.S. GAAP"). Pursuant to Argentine GAAP, the consolidated
financial statements and the selected financial data set forth below have been
restated for general price level changes, based on changes in the Argentine
general level whole price index.
 
    Argentine GAAP requires restatement of all financial statements to constant
Argentine pesos ("Pesos") as of the end of each period reported. Accordingly,
all financial accounts of YPF have been restated to constant Argentine pesos as
of December 31, 1993. More comprehensive information concerning YPF is included
in such reports and other documents filed with the Commission and the financial
information that follows is qualified in its entirety by reference to such
reports and other documents and all the financial information and notes
contained therein.
 
    Argentine law currently obliges Banco Central de la Republica Argentina to
sell U.S. dollars ("Dollars") at the rate of one Peso per Dollar    . At
February 28, 1995, the exchange rate between Pesos and Dollars was Ps.1.00 to
US$1.00.
 
                                       13
<PAGE>
                          YPF AND CONTROLLED COMPANIES
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
<TABLE><CAPTION>
                                                                      YEAR ENDED DECEMBER 31,
                                                                    ---------------------------
                                                                    1993       1992       1991
                                                                    -----      -----      -----
                                                                     (IN MILLIONS OF CONSTANT
                                                                              PESOS,
                                                                       EXCEPT FOR PER SHARE
                                                                         AND PER ADS DATA)
<S>                                                                 <C>        <C>        <C>
CONSOLIDATED INCOME STATEMENT DATA
AMOUNTS IN ACCORDANCE WITH ARGENTINE GAAP
  Net sales....................................................     3,958      3,867      4,159
  Gross profit.................................................     1,237      1,020        816
  Administrative expenses......................................      (118)      (240)      (266)
  Selling expenses.............................................      (303)      (188)      (185)
  Exploration expenses.........................................      (104)       (69)      (102)
  Operating income (loss)......................................       712        523        263
  Other expenses, net..........................................      (115)       (45)      (161)
  Financial income (expense) and holding gains (losses), net...       (41)       (73)       324
  Income from renegotiation of long-term contract..............       212       --         --
  Income before unusual and extraordinary gains (losses).......       776        409        374
  Unusual and extraordinary gains (losses), net................       (43)      (153)      (121)
  Income and assets tax........................................       (28)      --         --
  Net income (loss)............................................       706        256        253
  Income before unusual and extraordinary items per share and
per ADS (1)....................................................      2.20       1.16       --
  Actual and pro forma earnings per share and per ADS (1)......      2.00        .73       --
  Dividends per share and per ADS (1)..........................        68        .68       --
APPROXIMATE AMOUNTS IN ACCORDANCE WITH US GAAP
  Operating income (loss)......................................       592        385        173
  Income before extraordinary items............................       686        277        384
  Net income (loss)............................................       717        169        278
  Pro forma income before extraordinary items per share and per
ADS (1)........................................................      1.94        .78       --
  Actual and pro forma earnings per share and per ADS (1)......      2.03        .48       --
CONSOLIDATED BALANCE SHEET DATA (AT END OF PERIOD)
AMOUNTS IN ACCORDANCE WITH ARGENTINE GAAP
  Cash.........................................................        77         75         99
  Total assets.................................................     7,353      7,349      8,045
  Total debt...................................................       757        795        762
  Shareholders' equity.........................................     4,966      4,498      4,481
APPROXIMATE AMOUNTS IN ACCORDANCE WITH US GAAP
  Total assets.................................................     7,260      7,245      8,047
  Total debt...................................................     1,019      2,662      2,498
  Shareholders' equity.........................................     4,611      2,527      2,748
OTHER CONSOLIDATED FINANCIAL DATA
AMOUNTS IN ACCORDANCE WITH ARGENTINE GAAP
  Depreciation and amortization................................       539        628        667
  Cash used in fixed asset acquisitions........................       955        731        800
</TABLE>
 
- ------------
 
(1) The pro forma earnings per share and per ADS and dividends per share and per
    ADS data are presented assuming that a weighted average of 353,000,000
    shares were outstanding during each of the periods for which pro forma
    information is presented.
 
                                       14
<PAGE>
    Except as provided in the Merger Agreement, and as otherwise described in
this Offer to Purchase, neither YPF nor the Purchaser, nor to the best knowledge
of YPF and the Purchaser, any of the persons listed on Schedule I hereto, has
any contract, arrangement, understanding, or relationship with any other person
with respect to any securities of the Company, including, but not limited to,
any contract, arrangement, understanding or relationship concerning the transfer
or the voting of any securities of the Company, joint ventures, loan or option
arrangements, puts or calls, guarantees of loans, guarantees against loss of the
giving or withholding of proxies. Except as set forth in this Offer to Purchase,
neither YPF nor the Purchaser, nor, to the best of their knowledge, any of the
persons listed on Schedule I hereto, has had, since January 1, 1991, any
business relationships or transactions with the Company or any of its executive
officers, directors, or affiliates that would require reporting under the rules
of the Commission applicable to this Offer to Purchase. Except as set forth in
this Offer to Purchase, since January 1, 1991, there have been no contacts,
negotiations or transactions between the Purchaser, YPF or any of its
subsidiaries or, to the best knowledge of YPF and the Purchaser, any of the
persons listed on Schedule I hereto, and the Company or its affiliates,
concerning a merger, consolidation or acquisition, tender offer or other
acquisition of securities, election of directors or a sale or other transfer of
a material amount of assets. Except as set forth in this Offer to Purchase, and
except for the ownership by Mr. James Lesch, a director of YPF, of 2,000 Shares,
neither YPF nor the Purchaser, nor, to the best knowledge of YPF or the
Purchaser, any of the persons listed on Schedule I hereto, beneficially owns any
Shares or has effected any transactions in the Shares in the past 60 days.
 
    9. SOURCE AND AMOUNT OF FUNDS. The total amount of funds required by the
Purchaser to purchase all outstanding Shares and to pay related fees and
expenses is estimated to be approximately $800 million. The funds necessary to
purchase Shares pursuant to the Offer and to pay related fees and expenses will
be furnished to the Purchaser (i) by YPF as a capital contribution and (ii)
through the financings described below.
 
    YPF has received a commitment letter (the "Commitment Letter") from The
Chase Manhattan Bank (National Association) ("Chase") pursuant to which Chase
has agreed to provide four credit facilities aggregating up to $800,000,000: (i)
a $200,000,000 credit facility to be extended to YPF (the "YPF Facility"), (ii)
a credit facility of up to $600,000,000 to be extended to the Purchaser (the
"Purchaser Facility"), (iii) a credit facility of up to $250,000,000 to be
extended to Midgard Energy Company ("Midgard"), a wholly owned subsidiary of the
Company (the "Midgard Facility"), and (iv) a credit facility of up to
$250,000,000 to be extended to certain other subsidiaries of the Company as
described below (the "Subsidiaries Facility"). The proceeds of the YPF Facility
will be used to finance future exports of crude oil from Argentina. The proceeds
of the Purchaser Facility will be used to acquire the Shares. The proceeds of
the Midgard Facility and the Subsidiaries Facility will be used to repay, in
part, the Purchaser Facility. Chase has confirmed that it is willing to provide
the entire amount of these four facilities. Chase also has advised YPF that it
intends to arrange one or more syndicates of commercial banks, financial
institutions and other investors to provide a portion of these facilities
(Chase, together with such other banks, institutions and investors, if any, are
collectively referred to as the "Lenders") and that it proposes to act as the
agent (the "Agent") for the Lenders in connection with each of the facilities.
 
    YPF Facility. The YPF Facility will be made in a single loan (the "YPF
Loan") on or before the funding date of the Purchaser Loan described below and
mature on the earlier of: (a) November 5, 1995 and (b) the date that is seven
months from the date of its funding (such earlier date being the "YPF Maturity
Date"). At YPF's option, the interest rate applicable to the YPF Loan will be
the one, two or three-month London Interbank Offered Rate plus 1%. The YPF Loan
will be repaid in three consecutive monthly installments: the first installment
shall be due two months prior to the YPF Maturity Date and shall be in the
amount of $50,000,000 and the second and third installments shall be due one
month prior to the YPF Maturity Date and at the YPF Maturity Date and shall be
in the amount of $75,000,000 each. It is anticipated that the YPF Loan will be
repaid with funds generated by YPF's business operations, including crude oil
export revenues.
 
                                       15
<PAGE>
    Purchaser Facility. The Purchaser Facility will be made available in not
more than two advances (collectively, the "Purchaser Loan") and mature on the
earlier of: (a) the date that is 90 days after the expiration of the Tender
Offer (the "Tender Offer Closing Date") and (b) July 5, 1995 (such earlier date
being the "Purchaser Maturity Date"). At the Purchaser's option, the interest
rate applicable to the Purchaser Loan will be (a) the one-month London Interbank
Offered Rate plus a margin of (i) 1 3/4% until the date 60 days after the Tender
Offer Closing Date and (ii) 2 1/2% thereafter on that portion of the aggregate
outstanding principal amount of the Purchaser Loan equal to or less than
$500,000,000 and 3 1/2% on the aggregate outstanding principal amount of the
Purchaser Loan in excess of $500,000,000 or (b) Chase's base rate plus a margin
of (i) 3/4% until the date 60 days after the Tender Offer Closing Date and (ii)
1 1/2% thereafter on that portion of the aggregate outstanding principal amount
of the Purchaser Loan that is equal to or less than $500,000,000 and 2 1/2% on
the aggregate outstanding principal amount of the Purchaser Loan in excess of
$500,000,000. The Purchaser Loan will be guaranteed by YPF as described below.
In addition, prior to the Merger, the Purchaser Loan will be secured by a pledge
by the Purchaser of all of the Shares purchased pursuant to the Offer, or if
such pledge is not permissible under the Federal Reserve Board's Margin
Regulations, the Purchaser will agree not to dispose of any such Shares except
for cash at fair market value. The Lenders' obligation to fund the Purchaser
Loan is subject to certain conditions as described below. It is anticipated that
up to $100,000,000 of the Purchaser Loan will be repaid on or before the
Purchaser Maturity Date from cash held by the Company.
 
    Midgard Facility. YPF currently anticipates that on or before the Purchaser
Maturity Date, up to $250,000,000 of the Purchaser Loan will be repaid with
funds provided to the Company by Midgard. Midgard will provide the funds from
the proceeds of a loan of up to $250,000,000 (the "Midgard Loan") to be extended
by the Lenders pursuant to the Midgard Facility. The Midgard Loan will be made
in a single drawing, will mature on the date that is seven years after the date
the initial Purchaser Loan is funded (the "Purchaser Initial Funding Date") and
will be repaid in up to 20 consecutive quarterly installments commencing on the
date (the "Amortization Date") that is two years after the Purchaser Initial
Funding Date. At Midgard's option, the interest rate applicable to the Midgard
Loan will be (a) the one, two or three-month London Interbank Offered Rate plus
a margin of (i) 1 3/8% until the Amortization Date and (ii) 1 7/8% thereafter
until maturity or (b) Chase's base rate plus a margin of (i) 3/8% until the
Amortization Date and (ii) 7/8% thereafter until maturity. The Midgard Loan will
not be secured but will be guaranteed by YPF and the Company. The agreement
evidencing the Midgard Loan (the "Midgard Loan Agreement") will contain, among
other things, a negative pledge on all assets of Midgard. The Lenders'
obligation to fund the Midgard Loan is subject to certain conditions as
described below. It is anticipated that the Midgard Loan will be repaid with
funds generated by Midgard's business operations.
 
    Subsidiaries Facility. YPF currently anticipates that on or before the
Purchaser Maturity Date, up to $250,000,000 of the Purchaser Loan will be repaid
with funds provided to the Company by Natomas Energy Company ("Natomas"), Maxus
Northwest Java, Inc. ("Java") and Maxus Southeast Sumatra, Inc. ("Sumatra")
(collectively, the "Designated Subsidiaries"). The Designated Subsidiaries will
provide these funds from the proceeds of a loan of up to $250,000,000 (the
"Subsidiaries Loan") made to them by the Lenders pursuant to the Subsidiaries
Facility. The Subsidiaries Loan will be made in a single drawing on the
Purchaser Maturity Date, will mature on the date that is six years after the
Purchaser Initial Funding Date and will be repaid in up to 16 consecutive
quarterly installments commencing on the Amortization Date. At the option of the
Designated Subsidiaries, the interest rates applicable to the Subsidiaries Loan
will be (a) the one, two or three-month London Interbank Offered Rate plus a
margin of (i) 1 3/4% until the Amortization Date and (ii) 2 1/4% thereafter
until maturity or (b) Chase's base rate plus a margin of (i) 3/4% until the
Amortization Date and (ii) 1 1/4% thereafter until maturity. The Subsidiaries
Loan will be guaranteed by YPF and the Company and will be secured by certain
intangible assets and rights to payment of Java and Sumatra arising out of their
respective operations in Indonesia. The agreement evidencing the Subsidiaries
Loan (the "Subsidiaries Loan Agreement") will contain a negative pledge on all
of the other assets of the Designated Subsidiaries.
 
                                       16
<PAGE>
The Lenders' obligation to fund the Subsidiaries Loan is subject to certain
conditions as described below. It is anticipated that the Subsidiaries Loan will
be repaid with funds generated by the Designated Subsidiaries business
operations. Upon further review of the value of the assets of Midgard and the
Designated Subsidiaries, the terms of the Midgard Loan and the Subsidiaries Loan
may be modified to provide for intercompany guarantees or other arrangements
whereby Midgard and the Designated Subsidiaries provide support for each other's
loans.
 
    Conditions to Funding. The obligation of the Lenders to provide the YPF
Facility, the Purchaser Facility, the Midgard Facility and the Subsidiaries
Facility is subject to the fulfillment of certain conditions, including but not
limited to, (a) the absence of any material adverse change in the condition
(financial or otherwise), business operations, assets, nature of assets or
liabilities of (i) YPF and its subsidiaries (taken as a whole), (ii) the Company
and its subsidiaries (taken as a whole) or (iii) Midgard, Natomas, Java, and
Sumatra, (b) the receipt by the Purchaser of at least $200,000,000 from the
issuance of its common stock or a capital contribution from its immediate parent
or both, (c) approval by the Board of Directors of the Company of the Offer and
the Merger and recommendation that its shareholders tender their Shares, (d) the
Lenders' satisfaction that $800,000,000 is sufficient to (and does not exceed
the amount required to) consummate the Merger and to pay all related commissions
and expenses and (e) the Lenders' satisfaction that the Company will have
sufficient cash available to pay the lesser of (i) $100,000,000 or (ii) the
difference between (A) the principal amount of the Purchaser Loan outstanding on
the Purchaser Maturity Date and (B) the lesser of $500,000,000 or such other
amount as is available under the Commitment Letter for the Midgard Loan and the
Subsidiaries Loan as described above.
 
    The obligation of the Lenders to fund the Midgard Loan and the Subsidiaries
Loan will be subject to certain additional conditions, including without
limitation, (a) the effectiveness of the Merger, (b) the absence of any material
adverse change in the condition (financial or otherwise), business, operations,
assets, nature of assets or liabilities of (i) YPF and it subsidiaries (taken as
a whole), (ii) the Company and its subsidiaries (taken as a whole) and (iii)
Midgard, Natomas, Java or Sumatra, (c) the payment in full of the Purchaser Loan
and (d) all indebtedness and other obligations of each of Midgard, Natomas, Java
and Sumatra to the Company and its other subsidiaries shall have been paid in
full or satisfactorily subordinated to the repayment of the Midgard Loan and the
Subsidiaries Loan.
 
    Prepayment. Each of the YPF Loan, the Purchaser Loan, the Midgard Loan and
the Subsidiaries Loan (collectively, the "Loans") may be prepaid in whole or in
part without premium or penalty, except for costs associated with the prepayment
of any portion of a Loan bearing interest at a rate determined by reference to
the London Interbank Offered Rate prior to the end of any applicable interest
period.
 
    YPF Guarantee. YPF will guarantee the repayment of the Purchaser Facility,
the Midgard Facility and the Subsidiaries Facility. The YPF guarantee of the
Purchaser Facility may be secured, prior to the Merger, by a pledge of the
Purchaser's shares, and after the Merger by a pledge of the Company's shares.
The guarantee will also contain certain covenants including a limitation on
YPF's debt level and a required level of tangible net worth.
 
    Certain Fees. YPF has agreed to pay to Chase customary fees in connection
with each of the Facilities.
 
    Covenant Regarding Financing. In the Merger Agreement, YPF and the Purchaser
agreed that they will use their reasonable best efforts to obtain the financing
contemplated by the Commitment Letter.
 
    A copy of the Commitment Letter has been filed with the Commission by the
Purchaser as an exhibit to the Schedule 14D-1 filed by YPF and the Purchaser
with the Commission. The foregoing summary of the financing to be provided
pursuant to the Commitment Letter is qualified in its entirety by reference to
the Commitment Letter.
 
                                       17
<PAGE>
    10. BACKGROUND OF THE OFFER; PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS
WITH THE COMPANY. In mid-1994, YPF's Board of Directors adopted the goals of
becoming an internationally diversified oil company with significant assets
outside Argentina and obtaining management personnel skilled and experienced in
exploring for and producing oil and gas internationally. YPF sought to identify
a company that would permit it to further this goal. After analyzing several
companies, YPF believed that the Company would potentially present a good fit
with its goals.
 
    In December 1994, Jose Estenssoro, YPF's Chief Executive Officer, met with
Charles Blackburn, Chairman, President and Chief Executive Officer of the
Company. Messrs. Estenssoro and Blackburn had a wide-ranging discussion,
including discussion of a possible substantial equity investment in the Company
by YPF. Thereafter, representatives of YPF conducted due diligence at various
locations of the Company and its subsidiaries and had numerous other contacts
with representatives of the Company to obtain information throughout the period
from mid-December 1994 through the end of February 1995.
 
    In mid-January 1995, YPF determined that it had a serious interest in
exploring a possible transaction with the Company, and retained Salomon Brothers
to advise it in connection with this interest. During the week of January 16,
1995, further due diligence was conducted with the Company in Dallas. Throughout
this period, YPF, with Salomon Brothers' assistance, undertook analyses of
various alternatives and eventually determined that the most advantageous
alternative from the point of view of YPF and its stockholders was an
acquisition of 100% of the Shares. Thereafter, YPF and other interested parties
were advised that the Company wished to receive proposals from all parties
interested in an investment in or purchase of all of the Company, or the
purchase of Midgard, by January 27, 1995 and January 30, 1995, respectively, and
YPF submitted a proposal to acquire all of the Shares for $5 per Share in cash,
subject to arranging satisfactory financing, conducting further due diligence,
the approval of YPF's Board of Directors, the cessation by the Company of its
efforts to sell Midgard and the negotiation, approval and execution of
definitive documents providing for the necessary transactions. On February 15,
1995, Mr. Estenssoro travelled to Dallas to discuss YPF's progress in satisfying
these conditions with Mr. Blackburn, and to advise Mr. Blackburn that YPF was
proceeding towards making a definitive proposal prior to the Company's regularly
scheduled board meeting on February 28, 1995.
 
    On Saturday, February 25, 1995, YPF proposed to acquire all outstanding
Shares pursuant to the Offer and the Merger. During the period proceeding and
immediately following such proposal, representatives of YPF and the Company
engaged in extensive negotiations relating to the terms of the Merger Agreement.
 
    On February 28, 1995, following approval by their respective Boards of
Directors, the Company, YPF and the Purchaser entered into the Merger Agreement.
A summary of the terms of the Merger Agreement is set forth in Section 11. A
copy of the Merger Agreement has been filed as an Exhibit to the Schedule 14D-1
filed by YPF and the Purchaser with the Commission and is available for
inspection and copy at the principal office of the Commission in the manner set
forth in Section 7.
 
    On March 3, 1995, the Purchaser commenced the Offer.
 
    11. PURPOSE OF THE OFFER; THE MERGER; MERGER AGREEMENT; PLANS FOR THE
COMPANY. The purpose of the Offer, the Merger and the Merger Agreement is for
YPF to acquire control of, and the entire common equity interest in, the
Company. The Offer and the Merger Agreement are intended to increase the
likelihood that the Merger will be effected as promptly as practicable.
 
    The Merger Agreement. The following summary of the Merger Agreement, a copy
of which is filed as an exhibit to the Schedule 14D-1, is qualified by reference
to the Merger Agreement.
 
    The Offer. The Merger Agreement provides for the making of the Offer. The
obligation of the Purchaser to accept for payment or pay for Shares tendered
pursuant to the Offer is subject to the satisfaction of the Minimum Share
Condition, the Financing Condition and certain other conditions
 
                                       18
<PAGE>
that are set forth in Section 14 hereof. The Purchaser has reserved the right to
waive any conditions of the Offer or to modify any of the terms and conditions
of the Offer except that, without the consent of the Company, the Purchaser may
not (i) decrease the price per Share payable in the Offer, (ii) reduce the
minimum number of Shares to be purchased in the Offer, or (iii) impose
additional conditions to the Offer or make any other change in the terms or
conditions of the Offer that is materially adverse to the holders of the Shares.
 
    Recommendation. The Board of Directors of the Company, based in part upon
the opinion of CS First Boston Corporation that the proposed consideration to be
paid in the Offer and the Merger is fair from a financial point of view to the
holders of Shares, determined that the Offer and the Merger are in the best
interests of the Company and its stockholders, approved the Merger Agreement and
the transactions contemplated thereby, and recommended that holders of Shares
accept the Offer and tender their Shares pursuant to the Offer. The Merger
Agreement provides that if the Board of Directors of the Company determines that
it will not recommend acceptance of the Offer and approval of the Merger by the
Company's stockholders (or if such recommendation is withdrawn) based upon the
advice of legal counsel that such action is necessary for the Board of Directors
to comply with its fiduciary duties to stockholders under applicable law, such
non-recommendation or withdrawal of the recommendation shall not constitute a
breach of the Merger Agreement but will entitle the Purchaser to receive a
termination fee. See "Termination."
 
    Board Representation. The Merger Agreement provides that, upon the
Purchaser's acquisition of a majority of the outstanding Voting Shares pursuant
to the Offer, and from time to time thereafter so long as YPF and/or any of its
direct or indirect wholly owned subsidiaries (including the Purchaser) owns a
majority of the outstanding Voting Shares, YPF will be entitled, subject to
compliance with applicable law and the Company's certificate of incorporation,
to designate at its option up to that number of directors, rounded up to the
nearest whole number, of the Company's Board of Directors as will make the
percentage of the Company's directors designated by YPF equal to the percentage
of outstanding Voting Shares held by YPF and any of its direct or indirect
wholly owned subsidiaries (including the Purchaser), including Shares accepted
for payment pursuant to the Offer. The Company has agreed that it will, upon the
request of YPF, promptly increase the size of its Board of Directors and/or use
its reasonable best efforts to secure the resignation of such number of
directors as is necessary to enable YPF's designees to be elected to the
Company's Board of Directors and will use its reasonable best efforts to cause
YPF's designees to be so elected, subject to Section 14(f) of the Exchange Act;
provided, that, prior to the Effective Time (as defined in the Merger Agreement)
of the Merger, the Company will use its reasonable best efforts to assure that
the Company's Board of Directors always has (at its election) at least three
members who were directors of the Company as of the date of the commencement of
the Offer. At such times, the Company will use its reasonable best efforts to
cause persons designated by YPF to constitute the same percentage as such
persons represent on the Company's Board of Directors of (i) each committee of
the Board, (ii) each board of directors or board of management of each
subsidiary of the Company, and (iii) each committee of each such board.
 
    The Merger. The Merger Agreement provides that, unless the Merger Agreement
is terminated or abandoned (see "Termination" below), as soon as practicable
following fulfillment or waiver of the conditions described below under
"Conditions to the Merger," at the Effective Time, the Purchaser will be merged
with and into the Company, whereupon the separate corporate existence of the
Purchaser will cease and the Company will be the surviving corporation in the
Merger. The Merger Agreement further provides that (i) the certificate of
incorporation and the by-laws of the Company as in effect at the Effective Time
shall be the certificate of incorporation and the by-laws of the surviving
corporation, (ii) the directors of the Purchaser immediately prior to the
Effective Time shall be the directors of the surviving corporation, and (iii)
the officers of the Company immediately prior to the Effective Time shall be the
officers of the surviving corporation.
 
    Consideration to be Paid in the Merger. The Merger Agreement provides that
each Share outstanding immediately prior to the Effective Time (other than
Shares held in the treasury of the
 
                                       19
<PAGE>
Company, Shares owned by YPF, the Purchaser, any other direct or indirect
subsidiary of YPF, and other than Dissenting Shares (as defined below under
"Dissenters' Rights") shall, at the Effective Time, be cancelled and retired and
be converted into a right to receive in cash an amount per Share equal to the
highest price per Share paid by the Purchaser pursuant to the Offer, without
interest, upon the surrender of the certificate formerly representing such Share
and each Share held in the treasury of the Company, and each Share held by YPF,
the Purchaser or any other direct or indirect subsidiary of YPF immediately
prior to the Effective Time shall, at the Effective Time, be cancelled and
retired and no payment will be made with respect thereto. Each share of common
stock of the Purchaser issued and outstanding immediately prior to the Effective
Time will, by virtue of the Merger and without any action on the part of the
holder thereof, be converted into and become one share of common stock of the
surviving corporation, and each outstanding share of $4.00 Preferred Stock,
$9.75 Preferred Stock , and $2.50 Cumulative Preferred Stock, par value $1.00
per share ("$2.50 Preferred Stock"), of the Company (collectively, the
"Preferred Stock") will remain outstanding and have the identical powers,
preferences, rights, qualifications, limitations and restrictions as such shares
of Preferred Stock currently have, except as agreed to by the holder of the
$9.75 Preferred Stock See "$9.75 Preferred Stock Arrangements" below.
 
    Company Options and Restricted Shares. The Merger Agreement provides that
the Company will cooperate with YPF and the Purchaser in an effort to obtain the
surrender of all Company Options in respect of Shares in accordance with the
values set forth in Schedule 2.6 of the Merger Agreement. In addition,
immediately prior to the Effective Time, the restrictions on certain restricted
Shares held by certain officers of the Company will lapse without further
action.
 
    Stockholders' Meeting. In the Merger Agreement, the Purchaser agreed to take
all action necessary in accordance with applicable law and its certificate of
incorporation and by-laws to convene a meeting of its stockholders as promptly
as reasonably practicable following the date of the Merger Agreement to consider
and vote upon the adoption of the Merger Agreement, if such shareholder approval
is required by applicable law. At any such meeting, all Shares then owned by
YPF, the Purchaser or any other direct or indirect subsidiary of YPF will be
voted in favor of adoption of the Merger Agreement. Subject to its fiduciary
duties under applicable law, the Board of Directors of the Company will
recommend that the Company's stockholders approve adoption of the Merger
Agreement, if such stockholder approval is required.
 
    Dissenters' Rights. Holders of Shares will not have appraisal rights as a
result of the Offer. If the Merger is consummated, however, persons who hold
Shares at the time would have the right to appraisal of their Shares in
accordance with Section 262 of the Delaware General Corporation Law. Such
appraisal rights, if the statutory procedures are complied with, would result in
a judicial determination of the "fair value" of the Shares owned by such
holders. Any such judicial determination of the fair value of the Shares could
be based upon considerations other than or in addition to the price paid in the
Offer and the Merger and the market value of the Shares, including asset values,
the investment value of the Shares and any other valuation considerations
generally accepted in the investment community. The value so determined for
Shares could be more or less than the value of the consideration per Share to be
paid pursuant to the Offer or the Merger and payment of such consideration would
take place subsequent to payment pursuant to the Offer.
 
    In addition, several recent decisions by the Delaware courts have held that
a controlling stockholder of a corporation involved in a merger has a fiduciary
duty to the other stockholders which requires that the merger be fair to such
other stockholders. In determining whether a merger is fair to minority
stockholders, the Delaware courts have considered, among other things, the type
and amount of consideration to be received by the stockholders and whether there
was fair dealing among the parties. The Delaware Supreme Court indicated in
Weinberger v. UOP, Inc. and Rabkin v. Philip A. Hunt Chemical Corp. that
ordinarily the remedy available to stockholders in a merger that is found not to
be "fair" to minority stockholders is the right to appraisal described above or
a damages remedy based on essentially the same principles.
 
                                       20
<PAGE>
    If the Purchaser purchases Shares pursuant to the Offer, and the Merger or
another merger or other business combination is consummated more than one year
after the completion of the Offer, or if such a merger or other business
combination were to provide for the payment of consideration less than that paid
pursuant to the Offer, compliance by the Purchaser with Rule 13e-3 under the
Exchange Act would be required, unless the Shares were to be deregistered under
the Exchange Act prior to such transaction. See Section 12. Rule 13e-3 would
require, among other things, that certain financial information concerning the
Company and certain information relating to the fairness of the proposed
transaction and the consideration offered to minority stockholders therein be
filed with the Commission and disclosed to minority stockholders prior to
consummation of the transaction.
 
    Representations and Warranties. The Merger Agreement contains
representations and warranties by the Company, relating to, among other things,
(i) the organization of the Company and its subsidiaries and other corporate
matters, (ii) the capital structure of the Company, (iii) the authorization,
execution, delivery and consummation of the transactions contemplated by the
Merger Agreement, (iv) consents and approvals, (v) documents filed by the
Company with the Commission and the accuracy of the information contained
therein, (vi) the absence of certain changes and events, (vii) the accuracy of
the information contained in documents filed with the Commission in connection
with the Offer and the Merger, (viii) litigation, (ix) environmental matters,
(x) tax, insurance and labor matters, and (xi) matters relating to Title IV of
the Employee Retirement Income Security Act of 1974, as amended, and the rules
and regulations promulgated thereunder. In addition, the Merger Agreement
contains representations and warranties by YPF and the Purchaser related to,
among other things, (i) the organization of YPF and the Purchaser and other
corporate matters, (ii) the authorization, execution, delivery and consummation
of the transactions contemplated by the Merger Agreement, (iii) consents and
approvals, (iv) the execution of the Commitment Letter, and (v) YPF's having no
reason to believe that, following the Merger and the financings contemplated by
the Commitment Letter, the Company will not be able to meet its obligations as
they come due.
 
    Redemption of Rights. The Company represented in the Merger Agreement that
it has taken the necessary steps to redeem all of the outstanding Rights issued
pursuant to the Rights Agreement so that the Rights will not become exercisable
as a result of the consummation of the transactions contemplated by the Merger
Agreement.
 
    Agreements with Respect to the Conduct of Business Pending the Merger. The
Merger Agreement provides that except as specifically contemplated by the Merger
Agreement, during the period from the date of the Merger Agreement to the
earlier of the time that the designees of YPF have been elected to, and
constitute a majority of, the Board of Directors of the Company or the Effective
Time, the Company will, and will cause each of its subsidiaries to, conduct
their respective business only in, and not take any action except in, the
ordinary and usual course of business substantially consistent with past
practice, and use reasonable efforts to preserve intact the business
organization of the Company and each of its subsidiaries, to keep available the
services of its and their present officers and key employees and to preserve the
goodwill of those having business relationships with it or its subsidiaries. In
addition, subject to certain exceptions, during such period, the Company will
not, and will not permit any of its subsidiaries to (i) make or propose any
change or amendment to their respective certificates of incorporation or by-laws
(or comparable governing documents), except as may be required by law; (ii)
authorize for issuance, issue, sell or deliver any shares of capital stock or
any other securities of any of them (other than pursuant to the Company Options,
the $4.00 Preferred Stock, the $9.75 Preferred Stock, the Company's 401(k) Plan
or issuance of Shares issued under the terms of the Company's Director Plan in a
manner consistent with any such plan or past practice) or issue any securities
convertible into or exchangeable for, or options, warrants to purchase, scrip,
rights to subscribe for, calls or commitments of any character whatsoever
relating to, or enter into any contract with respect to the issuance of, any
shares of capital stock or any other securities of any of them (other than
pursuant to the Company Options, the $4.00 Preferred Stock, the $9.75 Preferred
Stock, the 401(k) Plan (or in connection with the 401(k) Plan or the Director
Plan, as aforesaid) purchase or otherwise acquire or
 
                                       21
<PAGE>
enter into any contract with respect to the purchase or voting of shares of
their capital stock, or adjust, split, combine or reclassify any of their
capital stock or other securities or make any other changes in their capital
structures; (iii) declare, set aside, pay or make any dividend or other
distribution or payment (whether in cash, stock or property) with respect to, or
purchase or redeem, any shares of the capital stock of any of them other than
(a) regular quarterly cash dividends on the $4.00 Preferred Stock, the $9.75
Preferred Stock and the $2.50 Preferred Stock, (b) dividends, distributions or
payments paid by its subsidiaries to the Company or its subsidiaries with
respect to their capital stock, (c) the Rights in accordance with the Rights
Agreement and (d) loans and payments from the Company to any of its subsidiaries
or from any of such subsidiaries to the Company or another such subsidiary; (iv)
adopt or amend any bonus, profit sharing, compensation, severance, termination,
stock option, pension, retirement, deferred compensation, welfare benefit plan,
change in control agreement, restricted stock, performance unit, employment or
other employee benefit agreements, trusts, plans, funds or other arrangements
for the benefit or welfare of any director, officer, employee or former
employee, or (except, other than with respect to certain senior executives of
the Company, for normal increases in the ordinary course of business that are
consistent with past practices and that, in the aggregate, do not result in a
material increase in benefits or compensation expense to the Company or pursuant
to collective bargaining agreements or other contracts presently in effect),
increase in any manner the compensation or fringe benefits of any director or
officer or pay any benefit not required by any existing plan, arrangement or
contract (including without limitation the granting of stock options, stock
appreciation rights, shares of restricted stock or performance units) or take
any action or grant any benefit not expressly required under the terms of any
existing contracts, trusts, plans, funds or other such arrangements or enter
into any contract to do any of the foregoing; or (v) except in the ordinary
course of business, (a) incur or assume any indebtedness, (b) assume, guarantee,
endorse or otherwise become liable (whether directly, contingently or otherwise)
for the obligation of any other person except in the ordinary course of business
and consistent with past practices, or (c) make any loans, advances or capital
contributions to, or investments (other than intercompany accounts and
short-term investments pursuant to customary cash management systems of the
Company in the ordinary course and consistent with past practices) in, any other
person other than such of the foregoing as are made by the Company to or in a
wholly owned subsidiary of the Company. In addition, the Company has agreed to
use its reasonable best efforts to (a) exempt the Company, the Offer and the
Merger from the requirements of any state takeover law, by action of the
Company's Board of Directors or otherwise and (b) assist in any challenge by the
Purchaser to the validity or applicable to the Offer or the Merger of any state
takeover law.
 
    No Solicitation. The Merger Agreement provides that neither the Company nor
any of its subsidiaries may, directly or indirectly, and each will instruct or
otherwise use its reasonable best efforts to cause its affiliates that are
controlled by the Company and the officers, directors, employees, agents or
advisors or other representatives or consultants of the Company not to,
encourage, solicit, initiate, engage or participate in discussions or
negotiations with or provide information to, any Person (as defined in the
Merger Agreement) (other than YPF, the Purchaser or subsidiaries, affiliates or
representatives of any of the foregoing) in connection with any tender offer,
exchange offer, merger, consolidation, business combination, sale of substantial
assets, sale of securities, liquidation, dissolution or similar transaction
involving the Company or any of its subsidiaries or divisions (including,
without limitation, Midgard Energy Company). Notwithstanding the foregoing, the
Company may do any of the foregoing if outside counsel to the Company advises
the Company's Board of Directors that any action is required for the Company's
directors to satisfy their fiduciary duties to the Company and its
constituencies under applicable law. The Company will (i) promptly notify YPF in
the event of any discussion, negotiation or proposal or offer of the type
referred to in the first sentence of this paragraph or any decision to furnish
information or take any other action referred to in the second sentence of this
paragraph and (ii) promptly furnish YPF copies of all written information
furnished to any corporation, partnership, person or other entity or group
pursuant to the second sentence of this paragraph to the extent not previously
furnished to YPF.
 
                                       22
<PAGE>
    Indemnification of Directors. Pursuant to the Merger Agreement, YPF has
agreed for a period of seven years after the Effective Time, to cause the
surviving corporation to indemnify, defend and hold harmless the present and
former officers, directors, employees and agents of the Company and its
subsidiaries (an "Indemnified Party") against all losses, claims, damages or
liabilities arising out of actions or omissions occurring on, prior to or after
the Effective Time to the full extent provided under Delaware law, the
certificate of incorporation and by-laws of the Company in effect at the date of
the Merger Agreement and under all agreements to which the Company is a party as
of the date of the Merger Agreement, provided that any determination required to
be made with respect to whether an Indemnified Party's conduct complies with the
standards set up under Delaware law, the certificate of incorporation or by-laws
of the Company or under any such agreement will be made by independent counsel
selected by the Indemnified Party and reasonably satisfactory to the surviving
corporation. The surviving corporation will maintain the Company's existing
officers' and directors' liability insurance ("D & O Insurance") in full force
and effect without reduction of coverage for a period of seven years after the
Effective Time, provided, however, that the surviving corporation will not be
required to pay an annual premium therefor in excess of 250% of the last annual
premium paid prior to the date of the Merger Agreement (the "Current Premium"),
and provided, further, that if the existing D&O Insurance expires, is terminated
or cancelled during such seven-year period, the surviving corporation will use
its best efforts to obtain as much D&O Insurance as can be obtained for the
remainder of such period for a premium on an annualized basis not in excess of
250% of the Current Premium.
 
    YPF's Undertaking. The Merger Agreement provides that whenever it requires
the Purchaser to take any action, such requirements will be deemed to include an
undertaking on the part of YPF to cause the Purchaser to take such action.
 
    Listing of Preferred Stock. Pursuant to the Merger Agreement, the Company
will, and YPF will cause the surviving corporation to, use their respective
reasonable efforts to continue the listing on the NYSE of the shares of
Preferred Stock which are currently listed on such Exchange or, if such shares
are delisted, to cause such shares of Preferred Stock to be listed on another
national securities exchange within the United States or admitted to trading on
the National Association of Securities Dealers Automated Quotation System and on
other organized securities markets in such foreign jurisdictions in which such
shares are presently traded. Notwithstanding anything in the Merger Agreement to
the contrary, the obligations of the Company and YPF regarding continued listing
of the Preferred Stock will survive the Effective Time with respect to any
series of Preferred Stock until such time as the aggregate market value of all
outstanding shares of such series is less than $2 million or the number of
outstanding shares of such series is less than 100,000.
 
    Certain Obligations of YPF. Pursuant to the Merger Agreement, in the event
that the Company is unable to meet its obligations as they come due, whether at
maturity or otherwise, including solely for the purposes of this clause,
dividend and redemption payments with respect to the Preferred Stock, YPF has
agreed to capitalize the Company in an amount necessary to permit the Company to
meet such obligations, provided that YPF's aggregate obligation will be (a)
limited to the amount of debt service obligations under the Purchaser Facility
of the loan agreement contemplated by the Commitment and, to the extent the
Purchaser Facility is replaced by the Midgard Facility and/or the Subsidiaries
Facility under the Commitment, the amount of debt service obligations under the
Midgard Facility and/or the Subsidiaries Facility and (b) reduced by the amount,
if any, of capital contributions received by the Company after the Effective
Time and the net proceeds of any sale by the Company of common stock or
non-redeemable preferred stock after the Effective Time. The foregoing
obligations of YPF will survive until the ninth anniversary of the Effective
Time.
 
    Termination. The Merger Agreement may be terminated and the Merger
contemplated thereby may be abandoned at any time prior to the Effective Time,
whether before or after approval by the stockholders of the Company: (a) by the
mutual consent of the Boards of Directors of YPF, Purchaser and the Company; (b)
by YPF and the Purchaser, on one hand, or the Company, on the other hand, if the
Offer expires or is terminated or withdrawn in accordance with the terms of the
Merger Agreement
 
                                       23
<PAGE>
without any Shares being purchased thereunder or the Offer is terminated, or if
the Purchaser has not purchased Shares validly tendered and not withdrawn
pursuant to the Offer in accordance with the terms of the Merger Agreement
within 75 calendar days after commencement of the Offer; provided, however, that
the party seeking to terminate the Merger Agreement is not in material breach of
the Merger Agreement; (c) by the Company if either YPF or the Purchaser
materially breaches, or by YPF and the Purchaser if the Company materially
breaches, any of the representations and warranties or covenants contained in
the Merger Agreement; (d) by either YPF and the Purchaser or the Company, if the
Merger is not consummated prior to June 30, 1995; provided, however, that the
right to terminate the Merger Agreement pursuant to this provision will not be
available to any party whose failure to fulfill any obligation under the Merger
Agreement has been the cause of, or resulted in, the failure of the Effective
Time to occur on or before such date; (e) by either YPF and Purchaser, on the
one hand, or the Company, on the other hand, if either one (or any assignee
permitted under the Merger Agreement) is restrained, enjoined or otherwise
precluded by an order, decree, ruling or injunction (other than an order or
injunction issued on a temporary or preliminary basis) of a court of competent
jurisdiction, governmental authority or other regulatory or administrative
agency or commission, from consummating the Merger or making the acquisition or
holding by YPF or its subsidiaries of the Shares or shares of common stock of
the surviving corporation illegal and all means of appeal and all appeals from
such order decree, ruling, injunction or other action have been finally
exhausted; (f) by the Company if the Board of Directors of the Company
determines that it must recommend the withdrawal of its acceptance of the Offer
and approval of the Merger by the Company's stockholders based upon the advice
of outside counsel that such action is necessary for the Board of Directors to
comply with its fiduciary duties to stockholders under applicable law; or (g) by
YPF and Purchaser, if: (i) the Board of Directors of the Company shall not have
recommended or shall withdraw, modify or change its recommendation relating to
the Merger or the Offer in a manner materially adverse to YPF or shall have
resolved to do any of the foregoing; (ii) the Board of Directors of the Company
shall have recommended to the stockholders of the Company that they accept or
approve, or the Company or any of its subsidiaries shall have agreed to engage
in, a Competing Transaction (as defined below); or (iii) any Person shall have
acquired beneficial ownership or the right to acquire beneficial ownership or
any "group" (as such term is defined under Section 13(d) of the Exchange Act and
the rules and regulations promulgated thereunder) shall have been formed which
beneficially owns, or has the right to acquire "beneficial ownership" (as
defined in the Rights Agreement) of, more than 20% of the then-outstanding
Shares of the Company.
 
    "Competing Transaction" is defined as any of the following involving the
Company or any of its subsidiaries: (i) any merger, consolidation, share
exchange, business combination or other similar transaction except for such of
the foregoing in which the only parties are the Company or one or more
subsidiaries of the Company; (ii) any sale, lease, exchange, mortgage, pledge,
transfer or other disposition of the assets of the Company or any of its
subsidiaries constituting 5% or more of the consolidated assets of the Company
or accounting for 5% or more of the consolidated revenues of the Company in a
single transaction or series of related transactions involving any person other
than the Company or one or more subsidiaries of the Company; or (iii) any tender
or exchange offer for 20% or more of the outstanding Voting Shares or the filing
of a registration statement under the Securities Act in connection therewith.
 
    In the event of any termination and abandonment pursuant to the Merger
Agreement, no party to the Merger Agreement (or any of its directors or
officers) will have any liability or further obligation to any other party to
the Merger Agreement, except for certain express obligations under the Merger
Agreement and except that no party will be relieved from liability for any
breach of the Merger Agreement. Any action by the Company to terminate the
Merger Agreement as described herein will require only the approval of a
majority of the directors of the Company then in office who are directors of the
Company on the date hereof, or persons nominated or elected to succeed such
directors by a majority of such directors (the "Continuing Directors").
 
                                       24
<PAGE>
    In the event the Merger Agreement is terminated, (i) YPF and the Purchaser
will not, and will cause their subsidiaries and affiliates controlled by them
not to, acquire or offer to acquire or request permission to acquire or offer to
acquire (either directly or pursuant to a waiver of this or any other covenant
in the Merger Agreement) Shares otherwise than pursuant to the Offer or the
Merger for a period of not less than 24 months after termination of the Merger
Agreement without prior written approval of the Board of Directors of the
Company, and (ii) the provisions of the confidentiality agreement previously
entered into (the "Confidentiality Agreement") between the Company and YPF (or
one of its affiliates) will continue to apply.
 
    Whether or not the Offer or Merger is consummated, all costs and expenses
incurred in connection with the Offer, the Merger Agreement and the transactions
contemplated thereby will be paid by the party incurring such costs and
expenses; provided, however, that (i) in the event of a termination of Merger
Agreement by the Company pursuant to clause (f) above or by YPF and the
Purchaser pursuant to clauses (g)(i) or (ii) above, the Company will be
obligated to promptly pay to the Purchaser $20 million in cash, and (ii) in the
event of a termination of the Merger Agreement by the Company or by YPF if at
the date of such termination any condition to the funding of the loans
contemplated by the Commitment Letter has not been satisfied, provided that at
such time no other condition to YPF's obligation to consummate the Offer or the
Merger, as the case may be, is unsatisfied (other than the failure to meet the
Minimum Share Condition as a result of the failure to obtain such funding), YPF
and the Purchaser, jointly and severally, will be obligated to promptly pay to
the Company $20 million in cash.
 
    Certain Employment Agreements. YPF has asked Mr. Charles L. Blackburn, the
Chairman, President and Chief Executive Officer of the Company to become an
international consultant to YPF and to remain a director of the Company. Among
other things, Mr. Blackburn would be paid an annual salary of $500,000, under a
proposed 2-year contract. He would have offices in Dallas and Buenos Aires, and
be expected to spend 50-75% of his time working for YPF.
 
    In addition, YPF has announced that following the Merger Mr. Peter Gaffney,
a founding partner of Gaffney, Cline and Associates, and a reservoir engineer
who is currently also President of the Society of Petroleum Engineers, will
become the interim Chief Executive Officer of the Company. The terms of Mr.
Gaffney's employment have not yet been agreed.
 
    $9.75 Preferred Stock Arrangements. In accordance with the provisions of the
Company's certificate of incorporation, the holder of the Company's $9.75
Preferred Stock must approve the Merger in order for the Merger to be
consummated. To induce such holder to consent to the Merger and, effective upon
the Effective Time, to (i) waive certain rights, including appraisal rights,
conversion rights, rights under the Rights Plan and the right to increased
dividends under certain circumstances, (ii) waive certain covenants restricting
the Company's ability to take certain actions and (iii) terminate the
registration rights associated with the $9.75 Preferred Stock, YPF has agreed,
effective as of the Effective Time, to guarantee the payment and performance of
each and every obligation of the Company to the registered owners of the
Company's $9.75 Preferred Stock thereunder, including the obligation to pay
quarterly dividend amounts and to redeem shares of the $9.75 Preferred Stock in
certain circumstances. In addition, the Company has agreed, effective upon the
Effective Time, (i) to waive certain rights, including the right to cause the
Company to redeem the $9.75 Preferred Stock at its option and the right of first
offer with respect to the transfer of the shares of $9.75 Preferred Stock, (ii)
to waive certain transfer restrictions with respect to the $9.75 Preferred
Stock, and (iii) to pay to The Prudential Insurance Company of America
("Prudential"), which is the current holder of all of the outstanding shares of
$9.75 Preferred Stock, a restructuring fee of $250,000 upon the Effective Time.
YPF has agreed to reimburse Prudential for all of its reasonable out-of-pocket
expenses arising in connection with these agreements.
 
    12. EFFECT OF THE OFFER ON THE MARKET FOR SHARES; STOCK EXCHANGE LISTING;
REGISTRATION UNDER THE EXCHANGE ACT. The purchase of Shares pursuant to the
Offer will reduce the number of Shares that
 
                                       25
<PAGE>
might otherwise trade publicly and the number of holders of Shares, which could
adversely affect the liquidity and market value of the remaining shares held by
stockholders other than the Purchaser.
 
    Depending upon the number of Shares purchased pursuant to the Offer, the
Shares may no longer meet the requirements of the NYSE for continued listing and
may, therefore, be delisted from such exchange. According to the NYSE's
published guidelines, the NYSE would consider delisting the Shares if, among
other things, the number of publicly-held Shares (excluding Shares held by
officers, directors, their immediate families and holders of 10% or more of the
Shares) were less than 600,000, there were fewer than 1,200 holders of at least
100 Shares or the aggregate market value of publicly held Shares were less than
$5 million. According to the Company 10-K, as of January 31, 1994 there were
approximately 35,740 record holders of Shares. If, as a result of the purchase
of Shares pursuant to the Offer, the Shares no longer meet the requirements of
the NYSE for continued listing and the listing of Shares is discontinued, the
market for the Shares could be adversely affected.
 
    If the NYSE were to delist the Shares (which the Purchaser intends to cause
the Company to seek if it acquires control of the Company and the Shares no
longer meet the NYSE listing requirements), it is possible that the Shares would
trade on another securities exchange or in the over-the-counter market and that
price quotations for the Shares would be reported by such exchange or through
the National Association of Securities Dealers Automated Quotation System
("NASDAQ") or other sources. The extent of the public market for the Shares and
availability of such quotations would, however, depend upon such factors as the
number of holders and/or the aggregate market value of the publicly-held Shares
at such time, the interest in maintaining a market in the Shares on the part of
securities firms, the possible termination of registration of the Shares under
the Exchange Act and other factors.
 
    The Shares are currently "margin securities" under the regulations of the
Board of Governors of the Federal Reserve System (the "Federal Reserve Board"),
which has the effect, among other things, of allowing brokers to extend credit
on the collateral of the Shares. Depending upon factors similar to those
described above regarding listing and market quotations, following the Offer it
is possible that the Shares would no longer constitute "margin securities" for
the purposes of the margin regulations of the Federal Reserve Board and
therefore could no longer be used as collateral for loans made by brokers.
 
    The Shares are currently registered under the Exchange Act. Registration of
the Shares under the Exchange Act may be terminated upon application by the
Company to the Commission if the Shares are not listed on a national securities
exchange and there are fewer than 300 record holders of the Shares. Termination
of registration of the Shares under the Exchange Act would reduce substantially
the information required to be furnished by the Company to its stockholders and
would make certain provisions of the Exchange Act, such as the short-swing
profit recovery provisions of Section 16(b), the requirement of furnishing a
proxy statement in connection with stockholders' meetings pursuant to Section
14(a) and the requirements of Rule 13e-3 under the Exchange Act with respect to
"going private" transactions no longer applicable to the Company. Furthermore,
if the Purchaser acquires a substantial number of Shares or the registration of
the Shares under the Exchange Act were to be terminated, the ability of
"affiliates" of the Company and persons holding "restricted securities" of the
Company to dispose of such securities pursuant to Rule 144 under the Securities
Act may be impaired or eliminated. If registration of the Shares under the
Exchange Act were terminated prior to the consummation of the Merger, the Shares
would no longer be "margin securities" or be eligible for listing or NASDAQ
reporting. It is the present intention of the Purchaser to seek to cause the
Company to make an application for termination of registration of the Shares as
soon as possible following the Offer if the requirements for termination of
registration are met.
 
    13. DIVIDENDS AND DISTRIBUTIONS. If, on or after February 28, 1995 , the
Company should, except as permitted under the Merger Agreement, (i) split or
combine the Shares, or otherwise change the Shares or its capitalization, (ii)
issue or sell any additional securities of the Company (other than Shares issued
or sold upon the exercise (in accordance with the present terms thereof) of
Company Options outstanding on February 28, 1995, or (iii) acquire currently
outstanding Shares or otherwise cause a
 
                                       26
<PAGE>
reduction in the number of outstanding Shares, then, without prejudice to the
Purchaser's rights under Sections 1 and 14, the Purchaser, in its sole
discretion (subject to the terms of the Merger Agreement), may make such
adjustments as it deems appropriate in the purchase price and other terms of the
Offer and the Merger including, without limitation, the amount and type of
securities offered to be purchased.
 
    If, on or after February 28, 1995 the Company should, except as permitted
under the Merger Agreement, declare or pay any dividend on the Shares or make
any distribution (including, without limitation, the issuance of additional
Shares pursuant to a stock dividend or stock split, the issuance of other
securities or the issuance of rights for the purchase of any securities) with
respect to the Shares that is payable or distributable to stockholders of record
on a date prior to the transfer to the name of the Purchaser or its nominee or
transferee on the Company's stock transfer records of the Shares purchased
pursuant to the Offer, then, without prejudice to the Purchaser's rights under
Sections 1 and 14, (i) the purchase price per Share payable by the Purchaser
pursuant to the Offer will be reduced by the amount of any such cash dividend or
cash distribution and (ii) any such non-cash dividend, distribution or right to
be received by the tendering stockholders will be received and held by the
tendering stockholders for the account of the Purchaser and will be required to
be promptly remitted and transferred by each tendering stockholder to the
Depositary for the account of the Purchaser, accompanied by appropriate
documentation of transfer. Pending such remittance and subject to applicable
law, the Purchaser will be entitled to all rights and privileges as owner of any
such non-cash dividend, distribution or right and may withhold the entire
purchase price or deduct from the purchase price the amount or value thereof, as
determined by the Purchaser in its sole discretion.
 
    14. CONDITIONS TO THE OFFER. Notwithstanding any other provision of the
Offer, the Purchaser shall not be required to accept for payment, purchase or
pay for any Shares tendered, and may postpone the acceptance for payment, the
purchase of, and/or payment for, Shares, and/or may, subject to the terms of the
Merger Agreement, amend or terminate the Offer if (i) the Minimum Share
Condition has not been satisfied, (ii) the Company shall not have taken the
steps necessary to redeem the Rights , (iii) the applicable waiting period under
the HSR Act shall not have expired or been terminated, (iv) the Financing
Condition shall not have been satisfied or (v) at any time at or before payment
for any Shares tendered pursuant to the Offer (whether or not any Shares have
theretofore been accepted for payment or paid for pursuant to the Offer), any of
the following events shall have occurred and be continuing:
 
        (a) there shall be in effect any temporary restraining order,
    preliminary or final injunction or other order or decree issued by any
    United States federal or state court of competent jurisdiction or United
    States federal or state governmental, regulatory or administrative agency or
    authority, (1) enjoining, restraining or otherwise prohibiting the Offer,
    the Merger or the acquisition by YPF or the Purchaser of Shares; (2)
    prohibiting or materially limiting the ownership or operation by YPF or the
    Purchaser of all or any substantial portion of the business or material
    assets of the Company and its subsidiaries, taken as a whole, or, as a
    consequence of the Offer, the Merger or YPF's or the Purchaser's acquisition
    of Shares, of YPF or any of its subsidiaries, or compelling YPF or the
    Purchaser to dispose of or to hold separate all or any material portion of
    the business or material assets of the Company and its subsidiaries, taken
    as a whole, or of YPF or any of its subsidiaries, or imposing any material
    limitation on the ability of YPF or the Purchaser to conduct such business
    or own such assets, (3) imposing material limitations on the ability of YPF
    or the Purchaser (or any other affiliate of YPF) to acquire or hold or to
    exercise full rights of ownership of the Shares, including without
    limitation the right to vote the Shares purchased by them on all matters
    properly presented to the stockholders of the Company, or (4) requiring
    material divestitures by YPF or the Purchaser or any of their subsidiaries
    or affiliates of any Shares, as a consequence of the Offer, Merger or YPF or
    the Purchaser's acquisition of Shares; or
 
        (b) there shall be any statute, rule, regulation or order promulgated,
    enacted, entered or deemed applicable to the Offer or the Merger, or any
    other action shall have been taken, by any government or governmental
    authority or agency or any court domestic or foreign, that is
 
                                       27
<PAGE>
    reasonably likely to result in any of the consequences referred to in
    clauses (1) through (4) of paragraph (a) above; or
 
        (c) there shall have occurred (1) any general suspension of trading in,
    or limitation on prices for, trading in securities on the NYSE or in the
    over-the-counter-market, (2) a declaration of a banking moratorium or any
    limitation or suspension of payments by United States authorities on the
    extension of credit by United States lending institutions, (3) a
    commencement of war, armed hostilities or other international or national
    calamity directly or indirectly involving the United States, (4) in the case
    of any of the foregoing existing at the time of the commencement of the
    Offer, a material acceleration or worsening thereof; or
 
        (d) it shall have been publicly disclosed or the Purchaser shall have
    learned that any person shall have entered into a definitive agreement or an
    agreement in principle with the Company with respect to a tender offer or
    exchange offer for any shares of capital stock of the Company (including
    without limitation the Shares or a merger, consolidation or other business
    combination or any acquisition or disposition of a material amount of assets
    or any comparable event with or involving the Company (other than such of
    the foregoing as is permitted by Merger Agreement); or
 
        (e) any of the representations and warranties of the Company in the
    Merger Agreement shall not have been, or shall cease to be, true and correct
    in all material respects (whether because of circumstances or events
    occurring in whole or in part prior to, on or after the date of the Merger
    Agreement), or the Company shall have not performed in all material respects
    the covenants to be performed by it pursuant to the Merger Agreement; or
 
        (f) the Merger Agreement shall have been terminated by the Company, on
    the one hand, or YPF and the Purchaser, on the other hand, in accordance
    with its terms or the Purchaser or YPF, on the one hand, and the Company, on
    the other hand, shall have reached an agreement providing for the
    termination of the Offer; or
 
        (g) the Company's Board of Directors shall have failed to recommend and
    approve, or shall no longer recommend and approve, the Offer or the adoption
    of the Merger Agreement, or shall materially modify or amend its
    recommendation and approval with respect thereto, or shall have resolved to
    do any of the foregoing (except that the foregoing shall not apply to a
    modification or amendment solely in the reasons for such recommendation and
    approval so long as the Board of Directors of the Company continues to
    recommend and approve acceptance of the Offer and adoption of the Merger
    Agreement by holders of the Company's Voting Shares); or
 
        (h) without limiting the generality or effect of paragraph (e) above,
    except as disclosed to YPF pursuant to the Agreement, there shall have been
    any material adverse change in the business, financial condition or results
    of operations of the Company and its subsidiaries, taken as a whole;
 
which, in the sole judgment of the Purchaser, in any such case regardless of the
circumstances (including any action or inaction by the Purchaser or any of its
affiliates other than a material breach by the Purchaser or YPF of the
Agreement) giving rise to any such condition, makes it inadvisable to proceed
with the Offer or with such acceptance for payment or purchase of or payment for
any of the Shares.
 
    The foregoing conditions (i) may be asserted by the Purchaser regardless of
the circumstances (including any action or inaction by the Purchaser or any of
its affiliates other than a breach by the Purchaser or YPF of the Merger
Agreement) giving rise to such condition and (ii) other than the Minimum Share
Condition, are for the sole benefit of the Purchaser and its affiliates. The
foregoing conditions, other than the Minimum Share Condition, may be waived by
the Purchaser in whole or in part at any time and from time to time in its sole
discretion. The failure by the Purchaser at any time to exercise any of the
foregoing rights will not be deemed a waiver of any other rights and each such
right will be deemed an ongoing right which may be asserted at any time and from
time to time.
 
                                       28
<PAGE>
    15. CERTAIN LEGAL MATTERS; REQUIRED REGULATORY APPROVALS. Except as set
forth in this Offer to Purchase, based on a review of publicly available filings
by the Company with the Commission and other publicly available information
regarding the Company, neither YPF nor the Purchaser is aware of any licenses or
regulatory permits that appear to be material to the business of the Company and
its subsidiaries, taken as a whole, and that might be adversely affected by the
Purchaser's acquisition of Shares (and the indirect acquisition of the stock of
the Company's subsidiaries) as contemplated herein, or any approvals or other
actions by or with any domestic, foreign or supranational governmental authority
or administrative or regulatory agency that would be required for the
acquisition or ownership of the Shares (or the indirect acquisition of the stock
of the Company's subsidiaries) by the Purchaser pursuant to the Offer as
contemplated herein. Should any such approval or other action be required, it is
presently contemplated that such approval or action would be sought except as
described below under "State Takeover Laws". Should any such approval or other
action be required, there can be no assurance that any such approval or action,
if needed, would be obtained without substantial conditions or that adverse
consequences might not result to the Company's or its subsidiaries' businesses,
or that certain parts of the Company's, YPF's, the Purchaser's or any of their
respective subsidiaries' businesses might not have to be disposed of or held
separate or other substantial conditions complied with in order to obtain such
approval or action or in the event that such approvals were not obtained or such
actions were not taken. The Purchaser's obligation to purchase and pay for
Shares is subject to certain conditions, including conditions with respect to
injunctions and governmental actions. See the Introduction and Section 14 for a
description thereof.
 
    State Takeover Laws. A number of states (including Delaware, where the
Company is incorporated) have adopted takeover laws and regulations which
purport, to varying degrees, to be applicable to attempts to acquire securities
of corporations which are incorporated in such states or which have substantial
assets, stockholders, principal executive offices or principal places of
business therein. To the extent that certain provisions of certain of these
state takeover statutes purport to apply to the Offer or the Merger, the
Purchaser believes that such laws conflict with federal law and constitute an
unconstitutional burden on interstate commerce. In 1982, the Supreme Court of
the United States, in Edgar v. Mite Corp., invalidated on constitutional grounds
the Illinois Business Takeover Statute which, as a matter of state securities
law, made takeovers of corporations meeting certain requirements more difficult,
and the reasoning in such decision is likely to apply to certain other state
takeover statutes. In 1987, however, in CTS Corp. v. Dynamics Corp. of America,
the Supreme Court of the United States held that the State of Indiana could, as
a matter of corporate law and, in particular, those aspects of corporate law
concerning corporate governance, constitutionally disqualify a potential
acquiror from voting on the affairs of a target corporation without the prior
approval of the remaining stockholders, provided that such laws were applicable
only under certain conditions. Subsequently, in TLX Acquisition Corp. v. Telex
Corp., a federal district court in Oklahoma ruled that the Oklahoma statutes
were unconstitutional insofar as they apply to corporations incorporated outside
Oklahoma in that they would subject such corporations to inconsistent
regulations. Similarly, in Tyson Foods, Inc. v. McReynolds, a federal district
court in Tennessee ruled that four Tennessee takeover statutes were
unconstitutional as applied to corporations incorporated outside Tennessee. This
decision was affirmed by the United States Court of Appeals for the Sixth
Circuit. In December 1988, a federal district court in Florida held in Grand
Metropolitan PLC v. Butterworth that the provisions of the Florida Affiliated
Transactions Act and Florida Control Share Acquisition Act were unconstitutional
as applied to corporations incorporated outside of Florida.
 
    The Purchaser has not attempted to comply with any state takeover statutes
in connection with the Offer or the Merger. The Purchaser reserves the right to
challenge the validity or applicability of any state law allegedly applicable to
the Offer or the Merger and nothing in this Offer to Purchase nor any action
taken in connection herewith is intended as a waiver of that right. In the event
that it is asserted that one or more takeover statutes apply to the Offer or the
Merger, and it is not determined by an appropriate court that such statute or
statutes do not apply or are invalid as applied to the Offer or the Merger, as
applicable, the Purchaser may be required to file certain documents with, or
receive
 
                                       29
<PAGE>
approvals from, the relevant state authorities, and the Purchaser might be
unable to accept for payment or purchase Shares tendered pursuant to the Offer
or be delayed in continuing or consummating the Offer. In such case, the
Purchaser may not be obligated to accept for purchase, or pay for, any Shares
tendered. See Section 14.
 
    Antitrust. The Offer and the Merger are subject to the HSR Act, which
provides that certain acquisition transactions may not be consummated unless
certain information has been furnished to the Antitrust Division of the
Department of Justice (the "Antitrust Division") and the Federal Trade
Commission ("FTC") and certain waiting period requirements have been satisfied.
On March 2, 1995, YPF filed a Notification and Report Form with respect to the
Offer (the "HSR Filing").
 
    Under the provisions of the HSR Act applicable to the Offer, the purchase of
Shares under the Offer may not be consummated until the expiration of a
15-calendar day waiting period following the filing by YPF. Accordingly, as such
filing was made on March 3, 1995, the waiting period with respect to the Offer
will expire at 11:59 p.m., New York City time, on March 18, 1995, unless YPF
receives a request for additional information or documentary material, or the
Antitrust Division and the FTC terminate the waiting period prior thereto. If,
within such 15-calendar day waiting period, either the Antitrust Division or the
FTC requests additional information or material from YPF concerning the Offer,
the waiting period will be extended and would expire at 11:59 p.m., New York
City time, on the tenth calendar day after the date of substantial compliance by
YPF with such request. Only one extension of the waiting period pursuant to a
request for additional information is authorized by the HSR Act. Thereafter,
such waiting period may be extended only by court order or with the consent of
YPF. The Purchaser will not accept for payment Shares tendered pursuant to the
Offer unless and until the waiting period requirements imposed by the HSR Act
with respect to the Offer have been satisfied. See Section 14.
 
    If the transaction to which the HSR Filing relates is abandoned prior to the
expiration of the 15-calendar day waiting period or any extension thereof, then
the purchase of Shares may not be consummated until 30 calendar days after
receipt by the Antitrust Division and the FTC of the Notification and Report
Forms of both YPF and the Company unless the 30-day period is earlier terminated
by the Antitrust Division and the FTC. Within such 30-day period, the Antitrust
Division or the FTC may request additional information or documentary materials
from YPF or the Company. The acquisition of Shares pursuant to the Offer to
Purchase may not be consummated until 20 days after such requests are
substantially complied with by both YPF and the Company. Thereafter, the waiting
period may be extended only by court order or with the consent of YPF and the
Company.
 
    The FTC and the Antitrust Division frequently scrutinize the legality under
the antitrust laws of transactions such as the Purchaser's acquisition of Shares
pursuant to the Offer and the Merger. At any time before or after the
Purchaser's acquisition of Shares, the Antitrust Division or the FTC could take
such action under the antitrust laws as it deems necessary or desirable in the
public interest, including seeking to enjoin the acquisition of Shares pursuant
to the Offer or otherwise or seeking divestiture of Shares acquired by the
Purchaser or divestiture of substantial assets of YPF or its subsidiaries.
Private parties and state attorneys general may also bring legal action under
the antitrust laws under certain circumstances. Based upon an examination of
publicly available information relating to the businesses in which YPF and the
Company are engaged, YPF and the Purchaser believe that the acquisition of
Shares by the Purchaser will not violate the antitrust laws. Nevertheless, there
can be no assurance that a challenge to the Offer or other acquisition of Shares
by the Purchaser on antitrust grounds will not be made or, if such a challenge
is made, of the result. See Section 14 for certain conditions to the Offer,
including conditions with respect to injunctions and certain governmental
actions.
 
    Certain Litigation. YPF and the Company have obtained copies of nine
complaints filed on March 1, 1995 in the Chancery Court of the State of Delaware
by alleged holders of Shares. In the various complaints, the plaintiffs purport
to sue individually and on behalf of classes comprised of the holders of Shares,
stockholders of the Company or all holders of the Company's securities. The
 
                                       30
<PAGE>
complaints name as defendants the Company, directors of the Company and certain
officers of the Company, a former director of the Company, and, with respect to
certain of the complaints, YPF, and allege, among other things, that the
defendant directors and officers of the Company breached their fiduciary duties
in approving the Offer and the Merger and that YPF aided and abetted the alleged
breach of duties. The plaintiffs purport to seek orders enjoining the
consummation of the Offer and the Merger (or the recission of those
transactions) or, in the alternative, accountings for any damages to the alleged
classes, together with their attorneys' fees and other relief. YPF intends to
vigorously defend these lawsuits. The absence of an injunction, among other
things, is a condition to Purchaser's obligation to purchase Shares tendered
pursuant to the Offer. See Section 11.
 
    16. FEES AND EXPENSES. Salomon Brothers is acting as Dealer Manager in
connection with the Offer. In addition, Salomon Brothers has provided certain
financial advisory services to YPF in connection with the proposed acquisition
of the Company. As compensation for such services, YPF has to date paid Salomon
Brothers a fee of $250,000, which fee was payable upon execution of the
engagement letter with Salomon Brothers, and $750,000 which fee was payable upon
execution of the Merger Agreement. YPF has also agreed to pay Salomon Brothers a
fee of 0.5% of the aggregate consideration involved in the acquisition of the
Company (less the $1,000,000 previously paid) contingent upon the consummation
of such acquisition. YPF has also agreed to retain Salomon Brothers as lead
underwriter or placement agent in connection with the possible issuance of debt
or equity securities to refinance such acquisition, for which it would receive
customary underwriting or placements fees or discounts. In addition, YPF has
agreed to reimburse Salomon Brothers for its reasonable out-of-pocket expenses,
including reasonable fees and disbursements of its counsel, incurred in
connection with the Offer and the Proposed Merger or otherwise arising out of
Salomon Brothers' engagement and to indemnify Salomon Brothers (and certain
affiliated persons) against certain liabilities and expenses, including certain
liabilities under the federal securities laws. Salomon Brothers may from time to
time in the future render various investment banking services to YPF and its
affiliates, for which it is expected it would be paid customary fees.
 
    D.F. King & Co., Inc. has been retained by the Purchaser as Information
Agent in connection with the Offer. The Information Agent may contact holders of
Shares by mail, telephone, telex, telegraph and personal interview and may
request brokers, dealers and other nominee stockholders to forward material
relating to the Offer to beneficial owners of Shares. The Purchaser will pay the
Information Agent reasonable and customary compensation for all such services in
addition to reimbursing the Information Agent for reasonable out-of-pocket
expenses in connection therewith. The Purchaser has agreed to indemnify the
Information Agent against certain liabilities and expenses in connection with
the Offer, including certain liabilities under the federal securities laws.
 
    In addition, Chase has been retained as the Depositary. The Purchaser will
pay the Depositary reasonable and customary compensation for its services in
connection with the Offer, will reimburse the Depositary for its reasonable
out-of-pocket expenses in connection therewith and will indemnify the Depositary
against certain liabilities and expenses in connection therewith, including
certain liabilities under the federal securities laws.
 
    Except as set forth above, neither YPF nor the Purchaser will pay any fees
or commissions to any broker, dealer or other person for soliciting tenders of
Shares pursuant to the Offer. Brokers, dealers, commercial banks and trust
companies and other nominees will, upon request, be reimbursed by YPF or the
Purchaser for customary clerical and mailing expenses incurred by them in
forwarding offering materials to their customers.
 
    17. MISCELLANEOUS. The Purchaser is not aware of any jurisdiction in which
the making of the Offer is not in compliance with applicable law. If the
Purchaser becomes aware of any jurisdiction in which the making of the Offer
would not be in compliance with applicable law, the Purchaser will make a good
faith effort to comply with any such law. If, after such good faith effort, the
Purchaser cannot comply with any such law, the Offer will not be made to (nor
will tenders be accepted from or on behalf
 
                                       31
<PAGE>
of) the holders of Shares residing in such jurisdiction. In those jurisdictions
whose securities or blue sky laws require the Offer to be made by a licensed
broker or dealer, the Offer is being made on behalf of the Purchaser by one or
more registered brokers or dealers which are licensed under the laws of such
jurisdiction.
 
    No person has been authorized to give any information or make any
representation on behalf of the Purchaser or YPF not contained in this Offer to
Purchase or in the Letter of Transmittal and, if given or made, such information
or representation must not be relied upon as having been authorized.
 
    The Purchaser has filed with the Commission the Schedule 14D-1 pursuant to
Rule 14d-3 under the Exchange Act, furnishing certain additional information
with respect to the Offer, and may file amendments thereto. The Schedule 14D-1
and any amendments thereto, including exhibits, may be inspected and copies may
be obtained at the same places and in the same manner as set forth in Section 7
(except that they will not be available at the regional offices of the
Commission).
 
                                          YPF ACQUISITION CORP.
 
                                       32
<PAGE>
                                                                      SCHEDULE I
 
                        DIRECTORS AND EXECUTIVE OFFICERS
                                       OF
                                 THE PURCHASER
                                    AND YPF
 
    1. DIRECTORS AND EXECUTIVE OFFICERS OF THE PURCHASER. The following table
sets forth the name, current business address and present principal occupation
or employment and material occupations, positions, offices or employments for
the past five years of each director and executive officer of YPF. Unless
otherwise indicated, the current business address of each person is c/o
YPF-Directorio, Avenida Pte. Roque Saenz Pena 777, 1364 Buenos Aires, Argentina
and each occupation set forth opposite an individual's name refers to employment
with the Purchaser. Each such person is a citizen of the Republic of Argentina,
unless otherwise indicated.
 
                        DIRECTORS AND EXECUTIVE OFFICERS
 
<TABLE><CAPTION>
                                        PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
                                          AND CURRENT BUSINESS ADDRESS; MATERIAL
                                           POSITIONS HELD DURING THE PAST FIVE
            NAME                           YEARS AND BUSINESS ADDRESSES THEREOF
- -----------------------------  ------------------------------------------------------------
<S>                            <C>
Jose A. Estenssoro             Director, President (see Directors and Executive Officers of
                                 YPF below)
Cedric Bridger                 Vice President (See Directors and Executive Officers of YPF
                                 below)
Carlos Olivieri                Vice President (See Directors and Executive Officers of YPF
                                 below)
Darial R. Sneed                Vice President and Secretary. Since 1993, Ms. Sneed has
                                 served as Vice President and Manager, Investor Relations
                                 for YPF-- U.S.A., Inc. From 1990 to 1993, she served as
                                 Associate Director, Investor Relations for BP America Inc.
                                 Her business address is YPF-U.S.A., Inc., 660 Madison
                                 Avenue, 20th floor, New York, New York 10021. Ms. Sneed is
                                 a citizen of the United States of America.
</TABLE>
 
    2. DIRECTORS AND EXECUTIVE OFFICERS OF YPF. The following table sets forth
the name, business address and present principal occupation or employment, and
material occupations, positions, offices or employments for the past five years
of each director and executive officer of YPF. Unless otherwise indicated, the
current business address of each such person is c/o YPF--Directorio, Avenida
Pte. Roque Saenz Pena 777, 1364 Buenos Aires, Argentina, and each occupation set
forth opposite an individual's name refers to employment with YPF. Each such
person is a citizen of the Republic of Argentina, unless otherwise indicated.
 
                                      I-1
<PAGE>
 
<TABLE><CAPTION>
                                        PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
                                          AND CURRENT BUSINESS ADDRESS; MATERIAL
                                           POSITIONS HELD DURING THE PAST FIVE
            NAME                           YEARS AND BUSINESS ADDRESSES THEREOF
- -----------------------------  ------------------------------------------------------------
<S>                            <C>
Jose A. Estenssoro             Director since 1991, President since 1990. He has been
                                 associated with YPF since 1990, when he was appointed
                                 Trustee by the Argentine Government. From 1987 through
                                 1989, he was President of Compania Sol Petroleo S.A. and
                                 previously, from 1962 to 1987, he occupied various
                                 executive positions with Hughes Tool Company, where he was
                                 named President in 1987.
Nells Leon                     Director since 1991, Executive Vice President since 1990. He
                                 was Vice President of Operations of Sol Petroleo S.A. from
                                 1987 to 1990.
Mario L. Pineiro               Director since 1992. He retired in 1992 as CEO of Alejandro
                                 Llauro e Hijos S.A., where he served for many years. Mr.
                                 Pineiro is also a director of Transportadora de Gas del
                                 Sur S.A.
Miguel Madanes                 Director since 1993. Presently involved in the cable
                                 television industry in Argentina and Brazil. Previously a
                                 Director of YPF from 1991 to 1992. He served as the CEO of
                                 Fate S.A. from 1971 until 1991.
Bayless A. Manning             Director since 1993. Director of IBJ Schroder Bank & Trust
                                 Company. Currently serves as a consultant. Partner of
                                 Paul, Weiss, Rifkind, Wharton & Garrison from 1977 until
                                 1990. Mr. Manning is a citizen of the United States of
                                 America.
Carlos de la Vega              Director since 1993. Presently Director of Institutional
                                 Relations and Human Resources of CIBA-Geigy Argentina.
                                 President of the Argentine Chamber of Commerce from 1988
                                 to 1993. He was also President of the Ibero-American
                                 Association of Chambers of Commerce from 1990 to 1992.
James R. Lesch                 Director since 1993. Currently retired. Chief Executive
                                 Officer (1979-1986) and Chairman of the Board (1981-1986)
                                 of the Hughes Tool Company. He also served as
                                 Commissioner, State of Texas Department Commerce
                                 (1988-1992) and previously as Director of the American
                                 Petroleum Institute. Mr. Lesch is a citizen of the United
                                 States of America.
Ernst Schneider                Director since 1993. Chairman of the Board of Leu Holding
                                 and Bank Leu Ltd. and a member of the Board of Directors
                                 of CS Holding Ltd. since 1993. Previously, he served as
                                 Vice Chairman and member of the Board of Credit Suisse.
                                 Mr. Schneider is a dual citizen of Switzerland and the
                                 United States of America.
Hector A. Domeniconi           Director since 1993. Presently, Managing Director of DEXCOR,
                                 a consulting firm in Argentina. Held several positions in
                                 the Ministry of Economy of Argentina from 1990 through
                                 1992.
Luis A. Prol                   Director since 1993. President of YPF Gas S.A. Held several
                                 positions in both Argentine Federal and Provincial
                                 governments, serving as Minister of the Treasury and
                                 Finance of the Province of Formosa from 1987 to 1989 and
                                 as Secretary of Hydrocarbons and Mining of the Ministry of
                                 Economy from 1991 to 1992.
</TABLE>
 
                                      I-2
<PAGE>
<TABLE><CAPTION>
                                        PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
                                          AND CURRENT BUSINESS ADDRESS; MATERIAL
                                           POSITIONS HELD DURING THE PAST FIVE
            NAME                           YEARS AND BUSINESS ADDRESSES THEREOF
- -----------------------------  ------------------------------------------------------------
<S>                            <C>
Angel Cirasino                 Director since 1993. Assistant Secretary for Petrochemistry
                                 and Mining of the Ministry of Economy of the Province of
                                 Mendoza since 1991. He was Managing Partner of Motomar
                                 Cuyo Marketing S.R.L. from 1989 to 1991.
Rodolfo Alejandro Diaz         Director since 1994. Mr. Diaz is a lawyer and has private
                                 practices in Buenos Aires and Mendoza. He was Secretary of
                                 Labor from 1989 until 1991 and Labor Minister from 1991
                                 until 1992.
Eduardo Petazze                Vice President, Refining and Marketing and Head of
                                 Restructuring Project since 1993. Previously, he served as
                                 Vice President of Exploration and Production from 1992 to
                                 1993 and Head of the Restructuring Project since 1991.
                                 Joined YPF in 1983.
Marcelo Guiscardo              Vice President, Exploration and Production since 1993.
                                 Previously, he was associated with Exxon Corporation from
                                 1979 to 1993.
Cedric Bridger                 Vice President, Finance and Corporate Development since
                                 1992. Before joining YPF, he was Marketing Manager for CVB
                                 Industrias Mecanicas in Brazil. Previously, he was
                                 associated with Hughes Tool Company from 1964 to 1989.
Carlos A. Olivieri             Vice President and General Controller since 1993. He was
                                 Controller and Director of Aerolineas Argentinas S.A. from
                                 1991 to 1992, a Director of the Central Bank of Argentina
                                 in 1991 and an accountant with Arthur Andersen & Co. from
                                 1974 to 1986.
Raul H. Oreste                 Vice President, Human Resources since 1990. He was
                                 previously associated with YPF from 1943 to 1963 and from
                                 1965 to 1977. From 1978 to 1990, Mr. Oreste was associated
                                 with Compania Naviera Perez Companc.
Juan A. Rodriguez              Vice President of Engineering and Technology since 1992. He
                                 joined YPF in 1990. From 1968 to 1990, he was associated
                                 with Hughes Tool Company of Argentina.
Juan J. Garacija               Vice President, Purchasing, Contracts and Environmental
                                 Protection since 1992. Consultant from 1989 to 1990, when
                                 he joined YPF. He has previously served YPF in various
                                 capacities from 1941 to 1976 and from 1982 to 1988.
Norberto Noblia                Vice President, Legal Affairs since 1989. Previously, he was
                                 associated with the Sindicatura General de Empresas
                                 Publicas from 1975 to 1986.
Martin Paez-Allende            Vice President for Institutional Affairs since September
                                 1994. From 1991 to 1994, he practiced law. Until 1991 he
                                 served as Vice President and member of the Board of Shell
                                 C.A.P.S.A. (Argentina).
</TABLE>
 
                                      I-3
<PAGE>
    Facsimile copies of the Letter of Transmittal, properly completed and duly
executed, will be accepted. The Letter of Transmittal, certificates for Shares
and any other required documents should be sent or delivered by each stockholder
of the company or his broker, dealer, commercial bank, trust company or other
nominee to the Depositary at its address set forth below:
 
                        The Depositary for the Offer is:
 
                            THE CHASE MANHATTAN BANK
                             (NATIONAL ASSOCIATION)
<TABLE><CAPTION>
<S>                         <C>                                      <C>
        By Mail:                    By Overnight Delivery:                        By Hand:
        Box 3032            c/o Chase Securities Processing Corp.            (9:00a.m.-5:00p.m.
4 Chase MetroTech Center            Ft. Lee Executive Park                   New York City Time)
   Brooklyn, NY 11245           1 Executive Drive (6th Floor)        1 Chase Manhattan Plaza, Floor 1-B
                                      Ft. Lee, NJ 07024                  Nassau and Liberty Streets
                                                                             New York, NY 10081
 
                               By Facsimile Transmission: (201) 592-1674
                                  Confirm by Telephone: (201) 592-4672
</TABLE>
 
    Any questions or requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
listed below. Additional copies of the Offer to Purchase, this Letter of
Transmittal and other tender offer materials may be obtained from the
Information Agent as set forth below, and will be furnished promptly at the
Purchaser's expense. You may also contact your broker, dealer, commercial bank,
trust company or other nominee for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
                             D.F. KING & CO., INC.
 
<TABLE>
<S>                                                 <C>
                  UNITED STATES                                           EUROPE
                 77 Water Street                             Royex House, Aldermanbury Square
             New York, New York 10005                            London, England EC2V 7HR
             (212) 269-5550 (Collect)                           (44) 71 600 5005 (Collect)
            (800) 488-8035 (Toll Free)
</TABLE>
 
                      The Dealer Manager for the Offer is:
                              SALOMON BROTHERS INC
                            Seven World Trade Center
                            New York, New York 10048
                                 (212) 783-6731
                                 (call collect)




                                                                Exhibit (a)(2)




                             LETTER OF TRANSMITTAL
                                TO TENDER SHARES
                                       OF
                                  COMMON STOCK
                                       OF
                            MAXUS ENERGY CORPORATION
             PURSUANT TO THE OFFER TO PURCHASE DATED MARCH 3, 1995
                                       BY
                             YPF ACQUISITION CORP.
                          A WHOLLY OWNED SUBSIDIARY OF
                              YPF SOCIEDAD ANONIMA
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
      NEW YORK CITY TIME, ON THURSDAY, MARCH 30, 1995, UNLESS THE OFFER IS
                                    EXTENDED
 
                        The Depositary for the Offer is:
 
                            THE CHASE MANHATTAN BANK
                             (NATIONAL ASSOCIATION)

<TABLE><CAPTION>
        By Mail:                   By Overnight Delivery:                       By Hand:
<S>                        <C>                                     <C>
        Box 3032           c/o Chase Securities Processing Corp.           (9:00a.m.-5:00p.m.
4 Chase MetroTech Center           Ft. Lee Executive Park                  New York City Time)
   Brooklyn, NY 11245          1 Executive Drive (6th Floor)       1 Chase Manhattan Plaza, Floor 1-B
                                     Ft. Lee, NJ 07024                 Nassau and Liberty Streets
                                                                           New York, NY 10081
 
<CAPTION>
 
                              By Facsimile Transmission: (201) 592-1674
                                 Confirm by Telephone: (201) 592-4672
</TABLE>
 
    DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE OR TRANSMISSIONS OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO A NUMBER
OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
 
    THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
 
    This Letter of Transmittal is to be completed by stockholders if
certificates for Shares (as defined in the Offer to Purchase, dated March 3,
1995 (the "Offer to Purchase")) are to be forwarded herewith or, unless an
Agent's Message (as defined in the Offer to Purchase) is utilized, if tenders of
shares are made by book-entry transfer to an account maintained by The Chase
Manhattan Bank (National Association) (the "Depositary") at The Depository Trust
Company ("DTC"), Midwest Securities Trust Company ("MSTC") or Philadelphia
Depository Trust Company ("PDTC") (each a "Book-Entry Transfer Facility" and
collectively referred to as the "Book-Entry Transfer Facilities"), pursuant to
the procedures set forth in Section 3 of the Offer to Purchase. Stockholders who
tender Shares by book-entry transfer are referred to herein as "Book-Entry
Stockholders".
 
    Holders of Shares whose certificates for such Shares (the "Share
Certificates") are not immediately available, or who cannot deliver their Share
Certificates and all other required documents to the Depositary on or prior to
the Expiration Date, must tender their Shares according to the guaranteed
delivery procedures set forth in Section 3 of the Offer to Purchase. See
instruction 2.


<PAGE>
NOTE: SIGNATURES MUST BE PROVIDED ON THE INSIDE AND REVERSE BACK COVER.
 
PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.
 
/ / CHECK HERE IF TENDERED COMMON SHARES ARE BEING DELIVERED BY BOOK-ENTRY
    TRANSFER TO THE DEPOSITARY'S ACCOUNT AT ONE OF THE BOOK-ENTRY TRANSFER
    FACILITIES AND COMPLETE THE FOLLOWING:
       Name of Tendering
      Institution:______________________________________________________________
 
       Check Box of Book-Entry Transfer Facility:
 
                / / The Depository Trust Company
                / / Midwest Securities Trust Company
                / / Philadelphia Depository Trust Company
       Account No. _____________________  Transaction Code No. _________________
 
/ / CHECK HERE IF SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED
    DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING.
    PLEASE ENCLOSE A PHOTOCOPY OF SUCH NOTICE OF GUARANTEED DELIVERY.
       Name(s) of Registered
       Holder(s):___________________________________________________________
       Window Ticket Number (if
       any):________________________________________________________________
       Date of Execution of Notice of Guaranteed
       Delivery:____________________________________________________________
       Name of Institution which Guaranteed
       Delivery:____________________________________________________________

<TABLE><CAPTION>

                                      DESCRIPTION OF SHARES TENDERED

     NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)                   SHARE CERTIFICATE(S) AND
      (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)                       SHARE(S) TENDERED
             APPEAR(S) ON SHARE CERTIFICATES)                   (ATTACH ADDITIONAL LIST, IF NECESSARY)
<S>                                                         <C>             <C>             <C>

                                                                             TOTAL NUMBER
                                                                              OF SHARES
                                                                SHARE        REPRESENTED      NUMBER OF
                                                             CERTIFICATE       BY SHARE         SHARES
                                                              NUMBER(S)     CERTIFICATE(S)*   TENDERED**

                                                            Total Shares
</TABLE>
 
   * Need not be completed by Book-Entry Stockholders.
 
  ** Unless otherwise indicated, it will be assumed that all Shares
     represented by certificates delivered to the Depositary are being
     tendered. See Instruction 4.



<PAGE>
Ladies and Gentlemen:
 
    The undersigned hereby tenders to YPF Acquisition Corp. (the "Purchaser"), a
Delaware corporation and a wholly owned subsidiary of YPF Sociedad Anonima
("YPF"), an Argentine corporation, the described shares of Common Stock, par
value $1.00 per share (the "Shares"), of Maxus Energy Corporation, a Delaware
corporation (the "Company"), at a price of $5.50 per Share, net to the seller in
cash, without interest thereon, upon the terms and subject to the conditions set
forth in the Offer to Purchase, dated March 3, 1995 (the "Offer to Purchase"),
receipt of which is hereby acknowledged, and in this Letter of Transmittal
(which together with the Offer to Purchase constitute the "Offer"). The
undersigned understands that the Purchaser reserves the right to transfer or
assign, in whole or from time to time in part, to YPF or one or more of YPF's
subsidiaries or affiliates, the right to purchase all or any portion of the
Shares tendered pursuant to the Offer.
 
    Subject to, and effective upon, acceptance for payment of and payment for
the Shares tendered herewith in accordance with the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms and conditions of such extension or amendment), the undersigned hereby
sells, assigns, and transfers to, or upon the order of, the Purchaser all right,
title and interest in and to all of the Shares that are being tendered hereby
and any and all dividends on the Shares or any distribution (including, without
limitation, the issuance of additional Shares pursuant to a stock dividend or
stock split, the issuance of other securities or the issuance of rights for the
purchase of any securities) with respect to the Shares that is declared or paid
by the Company on or after March 3, 1995 and is payable or distributable to
stockholders of record on a date prior to the transfer into the name of the
Purchaser or its nominees or transferees on the Company's stock transfer records
of the Shares purchased pursuant to the Offer (a "Distribution"), and
constitutes and irrevocably appoints the Depositary the true and lawful agent,
attorney-in-fact and proxy of the undersigned to the full extent of the
undersigned's rights with respect to such Shares (and any Distributions) with
full power of substitution (such power of attorney and proxy being deemed to be
an irrevocable power coupled with an interest), to (i) deliver Share
Certificates (and any Distributions) or transfer ownership of such Shares on the
account books maintained by the Book-Entry Transfer Facilities, together in
either such case with all accompanying evidences of transfer and authenticity,
to or upon the order of the Purchaser upon receipt by the Depositary, as the
undersigned's agent, of the purchase price, (ii) present Shares (and any
Distributions) for transfer on the books of the Company and (iii) receive all
benefits and otherwise exercise all rights of beneficial ownership of Shares
(and any Distributions), all in accordance with the terms of the Offer.
 
    The undersigned hereby irrevocably appoints Jose A. Estenssoro, Cedric
Bridger and Darial R. Sneed, and each of them individually, the
attorneys-in-fact and proxies of the undersigned, each with full power of
substitution, to vote in such manner as each such attorney and proxy or his
substitute shall, in his sole discretion, deem proper, and otherwise act
(including pursuant to written consent) with respect to all of the Shares
tendered hereby which have been accepted for payment by the Purchaser prior to
the time of such vote or action (and any Distributions) which the undersigned is
entitled to vote at any meeting of stockholders (whether annual or special and
whether or not an adjourned or postponed meeting) of the Company, or by consent
in lieu of such meeting, or otherwise. This power of attorney and proxy is
coupled with an interest in the tendered Shares and is irrevocable and is
granted in consideration of, and is effective upon, the acceptance for payment
of such Shares by the Purchaser in accordance with the terms of the Offer. Such
acceptance for payment shall revoke, without further action, any other power of
attorney or proxy granted by the undersigned at any time with respect to the
Shares (and any Distributions) and no subsequent powers of attorney or proxies
will be given (and if given will be deemed not to be effective) with respect
thereto by the undersigned. The undersigned understands that the Purchaser
reserves the right to require that, in order for Shares to be deemed validly
tendered, immediately upon the Purchaser's acceptance for payment of such
Shares, the Purchaser or its designees is able to exercise full voting rights
with respect to such Shares and other securities, including voting at any
meeting of stockholders.
 
    The undersigned hereby represents and warrants that the undersigned has full
power and authority to tender, sell, assign and transfer the Shares tendered
hereby (and any Distributions) and that, when the same are accepted for payment
by the Purchaser, the Purchaser will acquire good, marketable and unencumbered
title thereto, free and clear of all liens, restrictions, charges and
encumbrances and the same will not be subject to any adverse claim. The
undersigned, upon request, will execute and deliver all additional documents
deemed by the Depositary or the Purchaser to be necessary or desirable to
complete the sale, assignment and transfer of the Shares tendered hereby (and
any Distributions). In addition, the undersigned shall promptly remit and
transfer to the Depositary for the account of the Purchaser any and all other
Distributions in respect of the Shares tendered hereby, accompanied by
appropriate documentation of transfer and, pending such remittance or
appropriate assurance thereof, the Purchaser shall be entitled to all rights and
privileges as owner of any such Distributions, and may withhold the entire
purchase price or deduct from the purchase price of Shares tendered hereby the
amount or value thereof, as determined by the Purchaser in its sole discretion.



<PAGE>


    All authority herein conferred or herein agreed to be conferred shall not be
affected by, and shall survive, the death or incapacity of the undersigned and
any obligation of the undersigned hereunder shall be binding upon the heirs,
executors, administrators, legal representatives, successors and assigns of the
undersigned. Except as stated in the Offer to Purchase, this tender is
irrevocable.
 
    The undersigned understands that tenders of Shares pursuant to any one of
the procedures described in Section 3 of the Offer to Purchase and in the
instructions hereto will constitute a binding agreement between the undersigned
and the Purchaser upon the terms and subject to the conditions of the Offer.
 
    Unless otherwise indicated herein under "Special Payment Instructions,"
please issue the check for the purchase price and/or return any Share
Certificates not tendered or accepted for payment in the name(s) of the
undersigned. Similarly, unless otherwise indicated under "Special Delivery
Instructions," please mail the check for the purchase price and/or return any
Share Certificates not tendered or accepted for payment (and accompanying
documents, as appropriate) to the undersigned at the address shown below the
undersigned's signature. In the event that either or both the "Special Delivery
Instructions" and the "Special Payment Instructions" are completed, please issue
the check for the purchase price and/or return any Share Certificates not
tendered or accepted for payment in the name(s) of, and deliver said check
and/or return Share Certificates to, the person or persons so indicated. The
undersigned recognizes that the Purchaser has no obligation pursuant to the
"Special Payment Instructions" to transfer any Shares from the name of the
registered holder thereof if the Purchaser does not accept for payment any of
such Shares.


<PAGE>
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
To be completed ONLY if Share Certificates not tendered or not purchased and/or
the check for the purchase price of Shares purchased are to be issued in the
name of someone other than the undersigned, or if Shares tendered by book-entry
transfer which are not purchased are returned by credit to an account
maintained at a Book-Entry Transfer Facility other than that designated on the
front cover.
 
Issue check and/or certificates to:

Name:____________________________________________
                (PLEASE PRINT)

Address:_________________________________________

_________________________________________________

_________________________________________________
             (INCLUDE ZIP CODE)

_________________________________________________
 
 (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)
             (SEE SUBSTITUTE FORM W-9 BELOW)
 
/ / Credit unpurchased Shares tendered by book-entry transfer to the Book-Entry
    Transfer Account set forth below:
 
                        / / DTC    / / MSTC    / / PDTC
___________________________________________
 
              (ACCOUNT NUMBER)
            

                         SPECIAL DELIVERY INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
To be completed ONLY if Share Certificates not tendered or not purchased and/or
the check for the purchase price of Shares purchased are to be sent to someone
other than the undersigned, or to the undersigned at an address other than that
shown on the front cover.
 
Mail check and/or certificates to:
 
Name:___________________________________________
              (PLEASE PRINT)
 
Address:________________________________________

________________________________________________

________________________________________________
            (INCLUDE ZIP CODE)

________________________________________________
(TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)


<PAGE>
                                   SIGN HERE
 
                  (PLEASE COMPLETE SUBSTITUTE FORM W-9 BELOW)           SIGN
                                                                        HERE
X____________________________________________________________________  <--

X____________________________________________________________________
 
                            SIGNATURE(S) OF OWNER(S)
Dated: ______________________________________________________________
 
(Must be signed by the registered holder(s) exactly as name(s) appear(s) on the
Share Certificate(s) or on a security position listing or by person(s)
authorized to become registered holder(s) by certificates and documents
transmitted herewith. If signature is by trustees, executors, administrators,
guardians, attorneys-in-fact, officers of corporations or others acting in a
fiduciary or representative capacity, please provide the necessary information.
See Instruction 5.)
Name(s): ____________________________________________________________

_____________________________________________________________________
                                 (PLEASE PRINT)

Capacity (Full Title): ______________________________________________

Address: ____________________________________________________________

_____________________________________________________________________

_____________________________________________________________________
                               (INCLUDE ZIP CODE)

Area Code and Telephone Number: _____________________________________

Tax Identification or Social Security No.: __________________________
                       (SEE SUBSTITUTE FORM W-9 BELOW)
 
                           GUARANTEE OF SIGNATURE(S)
 
                    (IF REQUIRED--SEE INSTRUCTIONS 1 AND 5)

Authorized Signature: _______________________________________________

Name: _______________________________________________________________

Name of Firm: _______________________________________________________

Address: ____________________________________________________________

_____________________________________________________________________

_____________________________________________________________________
                               (INCLUDE ZIP CODE)

Area Code and Telephone Number: ___________________________________

Dated: ______________________________________________________________


<PAGE>
                                  INSTRUCTIONS
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. GUARANTEE OF SIGNATURES. No signature guarantee on this Letter of
Transmittal is required (a) if this Letter of Transmittal is signed by the
registered holder of the Shares tendered herewith, unless such holder has
completed either the box entitled "Special Delivery Instructions" or the box
entitled "Special Payment Instructions" or (b) if such Shares are tendered for
the account of a bank or trust company in the United States or by a firm that is
a member of the National Association of Securities Dealers, Inc. or of a
registered national securities exchange (an "Eligible Institution"). In all
other cases, all signatures on this Letter of Transmittal must be guaranteed by
an Eligible Institution. See Instruction 5.
 
    2. DELIVERY OF LETTER OF TRANSMITTAL AND CERTIFICATES. This Letter of
Transmittal is to be used if Share Certificates are to be forwarded herewith or,
unless an Agent's Message is utilized, if tenders are to be made pursuant to the
procedures for tender by book-entry transfer set forth in Section 3 of the Offer
to Purchase. Share Certificates, or timely confirmation (a "Book-Entry
Confirmation") of a book-entry transfer of such Shares into the Depositary's
account at a Book-Entry Transfer Facility, as well as this Letter of Transmittal
(or a facsimile hereof), properly completed and duly executed, with any required
signature guarantees, or an Agent's Message (as defined in the Offer to
Purchase) in connection with a book-entry transfer, and any other documents
required by this Letter of Transmittal, must be received by the Depositary at
one of its addresses set forth herein prior to the Expiration Date and, if
later, stockholders who cannot deliver their Share Certificates and all other
required documents to the Depositary prior to the Expiration Date or who cannot
complete the procedures for delivery by book-entry transfer on a timely basis
must tender their Shares by properly completing and duly executing a Notice of
Guaranteed Delivery pursuant to the guaranteed delivery procedures set forth in
Section 3 of the Offer to Purchase. Pursuant to such procedure: (a) such tender
must be made by or through an Eligible Institution; (b) a properly completed and
duly executed Notice of Guaranteed Delivery, substantially in the form made
available by the Purchaser, must be received by the Depositary on or prior to
the Expiration Date; and (c) the Share Certificates (or a Book-Entry
Confirmation) representing all tendered Shares, in proper form for transfer
together with a properly completed and duly executed Letter of Transmittal (or a
facsimile hereof), with any required signature guarantees (or, in the case of a
book-entry transfer, an Agent's Message) and any other documents required by
this Letter of Transmittal, must be received by the Depositary within five New
York Stock Exchange, Inc. ("NYSE") trading days after the date of execution of
such Notice of Guaranteed Delivery as provided in Section 3 of the Offer to
Purchase. If Share Certificates are forwarded separately to the Depositary, a
properly completed and duly executed Letter of Transmittal (or facsimile hereof)
must accompany each such delivery.
 
    THE METHOD OF DELIVERY OF SHARE CERTIFICATES, THIS LETTER OF TRANSMITTAL AND
ALL OTHER REQUIRED DOCUMENTS IS AT THE OPTION AND SOLE RISK OF THE TENDERING
STOCKHOLDER, AND THE DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY
THE DEPOSITARY. IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT
REQUESTED, PROPERLY INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME
SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.
 
    No alternative, conditional or contingent tenders will be accepted. All
tendering stockholders, by execution of this Letter of Transmittal or facsimile
hereof, waive any right to receive any notice of the acceptance of their Shares
for payment.
 
    3. INADEQUATE SPACE. If the space provided herein under "Description of
Shares Tendered" is inadequate, the certificate numbers and/or the number of
Shares and any other required information should be listed on a separate
schedule attached hereto and separately signed on each page thereof in the same
manner as this Letter of Transmittal is signed.
 
    4. PARTIAL TENDERS (NOT APPLICABLE TO STOCKHOLDERS WHO TENDER BY BOOK-ENTRY
TRANSFER). If fewer than all the Shares evidenced by any certificate submitted
are to be tendered, fill in the number of Shares which are to be tendered in the
box entitled "Number of Shares Tendered." In such case, new certificate(s) for
the remainder of the Shares that were evidenced by your old certificate(s) will
be sent to you, unless otherwise provided in the appropriate box marked "Special
Payment Instructions" and/or "Special Delivery Instructions" on this Letter of
Transmittal, as soon as practicable after the Expiration Date. All Shares
represented by certificates delivered to the Depositary will be deemed to have
been tendered unless otherwise indicated.
 
    5. SIGNATURES ON LETTER OF TRANSMITTAL, STOCK POWERS AND ENDORSEMENTS. If
this Letter of Transmittal is signed by the registered holder(s) of the Shares
tendered hereby, the signature(s) must correspond exactly with the name(s) as
written on the face of the certificate(s) without alteration, enlargement or any
change whatsoever.
 
    If any of the Shares tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.


<PAGE>

    If any tendered Shares are registered in different names on several
certificates, it will be necessary to complete, sign and submit as many separate
Letters of Transmittal as there are different registrations of certificates.
 
    If this Letter of Transmittal or any certificates or stock powers are signed
by trustees, executors, administrators, guardians, attorneys-in-fact, officers
of corporations or others acting in a fiduciary or representative capacity, such
persons should so indicate when signing, and proper evidence satisfactory to the
Purchaser of their authority so to act must be submitted.
 
    If this Letter of Transmittal is signed by the registered holder(s) of the
Shares listed and transmitted hereby, no endorsements of Share Certificates or
separate stock powers are required unless payment is to be made to, or
certificates for Shares not tendered or purchased are to be issued in the name
of, a person other than the registered holder(s). Signatures on such Share
Certificates or stock powers must be guaranteed by an Eligible Institution.
 
    If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Shares listed, the Share Certificates must be
endorsed or accompanied by appropriate stock powers, in either case signed
exactly as the name or names of the registered holder(s) appear(s) on the
certificates. Signatures on such Share Certificates or stock powers must be
guaranteed by an Eligible Institution.
 
     6. STOCK TRANSFER TAXES. Except as set forth in this Instruction 6, the
Purchaser will pay or cause to be paid any stock transfer taxes with respect to
the transfer and sale of purchased Shares to it or its order pursuant to the
Offer. If, however, payment of the purchase price is to be made to, or if
certificates for Shares not tendered or purchased are to be registered in the
name of, any person other than the registered holder, or if tendered Share
Certificates are registered in the name of any person other than the person(s)
signing this Letter of Transmittal, the amount of any stock transfer taxes
(whether imposed on the registered holder or such person) payable on account of
the transfer to such person will be deducted from the purchase price unless
satisfactory evidence of the payment of such taxes or exemption therefrom is
submitted.
 
    EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY FOR
TRANSFER TAX STAMPS TO BE AFFIXED TO THE SHARE CERTIFICATES LISTED IN THIS
LETTER OF TRANSMITTAL.
 
     7. SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS. If a check is to be issued in
the name of and/or certificates for unpurchased Shares are to be returned to a
person other than the signer of this Letter of Transmittal or if a check is to
be sent and/or such Share Certificates are to be returned to someone other than
the signer of this Letter of Transmittal or to an address other than that shown
on the front cover hereof, the appropriate boxes on this Letter of Transmittal
should be completed. Stockholders tendering Shares by book-entry transfer may
request that Shares not purchased be credited to such account maintained at such
Book-Entry Transfer Facility as such stockholder may designate hereon. If no
such instructions are given, such Shares not purchased will be returned by
crediting the account at the Book-Entry Transfer Facility designated above. See
Instruction 1.
 
     8. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES. Questions and requests for
assistance may be directed to the Information Agent at its address or telephone
number set forth below. Requests for additional copies of the Offer to Purchase
and this Letter of Transmittal may be directed to the Information Agent or to
brokers, dealers, commercial banks or trust companies.
 
     9. 31% BACKUP WITHHOLDING; SUBSTITUTE FORM W-9. Under U.S. Federal income
tax law, a stockholder whose tendered Shares are accepted for payment is
required to provide the Depositary with such stockholder's correct taxpayer
identification number ("TIN") on Substitute Form W-9 below. If the Depositary is
not provided with the correct TIN, the Internal Revenue Service may subject the
stockholder or other payee to a $50 penalty. In addition, payments that are made
to such stockholder or other payee with respect to Shares purchased pursuant to
the Offer may be subject to 31% backup withholding.
 
    Certain stockholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, the stockholder must submit a Form W-8, signed under penalties of
perjury, attesting to that individual's exempt status. A Form W-8 can be
obtained from the Depositary. See the enclosed "Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9" for more instructions.
 
    If backup withholding applies, the Depositary is required to withhold 31% of
any such payments made to the stockholder or other payee. Backup withholding is
not an additional tax. Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld. If withholding
results in an overpayment of taxes, a refund may be obtained from the Internal
Revenue Service.
 
    The stockholder is required to give the Depositary the TIN (e.g. social
security number or employer identification number) of the record owner of the
Shares or of the last transferee appearing on the transfers attached to, or
endorsed on, the Shares. If the Shares are in more than one name or are not in
the name of the


<PAGE>


actual owner, consult the enclosed "Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9" for additional guidance on which
number to report.
 
    10. LOST, DESTROYED OR STOLEN CERTIFICATES. If any certificate(s)
representing Shares has (have) been lost, destroyed or stolen, the stockholder
should promptly notify the Transfer Agent for the Company, Society National
Bank. The stockholder will then be instructed as to the steps that must be taken
in order to replace the certificate(s). This Letter of Transmittal and related
documents cannot be processed until the procedures for replacing lost or
destroyed certificates have been followed.
 
    IMPORTANT: THIS LETTER OF TRANSMITTAL (OR A FACSIMILE COPY HEREOF) OR AN
AGENT'S MESSAGE TOGETHER WITH SHARE CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY
TRANSFER AND ALL OTHER REQUIRED DOCUMENTS MUST BE RECEIVED BY THE DEPOSITARY ON
OR PRIOR TO THE EXPIRATION DATE.

<PAGE>
                  TO BE COMPLETED BY ALL TENDERING STOCKHOLDERS
                               (SEE INSTRUCTION 9)

<TABLE><CAPTION>
 
                    PAYER'S NAME:  CHASE MANHATTAN BANK, N.A.


<S>                            <C>                                    
                                 PART 1--PLEASE PROVIDE
                                 YOUR TIN IN THE BOX AT RIGHT AND       -------------------------
  SUBSTITUTE                     CERTIFY BY SIGNING AND DATING BELOW.    Social Security Number
                                                                                   or
  FORM W-9                                                              -------------------------
  Department of the Treasury                                          Employer Identification Number
  Internal Revenue Service                                
 
                                 PART 2--Certification--Under penalties of perjury, I certify that:
 
                                 (1) The number shown on this form is my correct
                                 Taxpayer Identification Number (or I am waiting
                                 for a number to be issued to me) and
 
                                 (2) I am not subject to backup withholding because:
                                 (a) I am exempt from backup withholding, or (b) I
                                 have not been notified by the Internal Revenue
  PAYER'S REQUEST FOR            Service (the "IRS") that I am subject 
  TAXPAYER IDENTIFICATION        to backup withholding as a result of a failure to
  NUMBER ("TIN")                 report all interest or dividends, or (c) the IRS
                                 has notified me that I am no longer subject to
                                 backup withholding.
 
                                 Certification Instructions--You must cross out
                                 item (2) above if you have been notified by the
                                 IRS that you are currently subject to backup
                                 withholding because of under-reporting interest
                                 or dividends on your tax return. However, if
                                 after being notified by the IRS that you were
                                 subject to backup withholding, you received
                                 another notification from the IRS that you are no
                                 longer subject to backup withholding, do not
                                 cross out such Item (2).
 
                                                                                      PART 3--
                                 Signature________________________________________
                                                                                      Awaiting TIN / /
                                 Date
                                       ___________________________________________, 1995
</TABLE>

 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER. PLEASE REVIEW
      THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
      NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
 
           YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED
                   THE BOX IN PART 3 OF SUBSTITUTE FORM W-9.
 
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
      I certify under penalties of perjury that a taxpayer identification
  number has not been issued to me, and either (1) I have mailed or delivered
  an application to receive a Taxpayer Identification Number to the appropriate
  Internal Revenue Service Center or Social Security Administration Office, or
  (2) I intend to mail or deliver an application in the near future. I
  understand that if I do not provide a Taxpayer Identification Number by the
  time of payment, 31% of all reportable payments made to me will be withheld,
  but that such amounts will be refunded to me if I then provide a Taxpayer
  Identification Number within sixty (60) days.
 
Signature                                           Date                , 1995
         -----------------------                        ________________

<PAGE>

    Facsimile copies of the Letter of Transmittal, properly completed and duly
executed, will be accepted. The Letter of Transmittal, certificates for Shares
and any other required documents should be sent or delivered by each stockholder
of the company or his broker, dealer, commercial bank, trust company or other
nominee to the Depositary at its address set forth below:
 
                        The Depositary for the Offer is:
 
                            THE CHASE MANHATTAN BANK
                             (NATIONAL ASSOCIATION)
<TABLE><CAPTION>
        By Mail:                    By Overnight Delivery:                        By Hand:
<S>                         <C>                                      <C>
        Box 3032            c/o Chase Securities Processing Corp.            (9:00a.m.-5:00p.m.
4 Chase MetroTech Center            Ft. Lee Executive Park                   New York City Time)
   Brooklyn, NY 11245           1 Executive Drive (6th Floor)        1 Chase Manhattan Plaza, Floor 1-B
                                      Ft. Lee, NJ 07024                  Nassau and Liberty Streets
                                                                             New York, NY 10081
 

                               By Facsimile Transmission: (201) 592-1674
                                  Confirm by Telephone: (201) 592-4672
</TABLE>
 
    Any questions or requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
listed below. Additional copies of the Offer to Purchase, this Letter of
Transmittal and other tender offer materials may be obtained from the
Information Agent as set forth below, and will be furnished promptly at the
Purchaser's expense. You may also contact your broker, dealer, commercial bank,
trust company or other nominee for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
                             D.F. KING & CO., INC.
 
<TABLE>
<S>                                                 <C>
                  UNITED STATES                                           EUROPE
                 77 Water Street                             Royex House, Aldermanbury Square
             New York, New York 10005                            London, England EC2V 7HR
             (212) 269-5550 (Collect)                           (44) 71 600 5005 (Collect)
            (800) 488-8035 (Toll Free)
</TABLE>
 
                      The Dealer Manager for the Offer is:
                              SALOMON BROTHERS INC
                            Seven World Trade Center
                            New York, New York 10048
                                 (212) 783-6731
                                 (call collect)









                                                                Exhibit (a)(3)

                         NOTICE OF GUARANTEED DELIVERY

                                      FOR

                        TENDER OF SHARES OF COMMON STOCK

                                       OF

                            MAXUS ENERGY CORPORATION
 
    This Notice of Guaranteed Delivery or one substantially equivalent hereto
must be used to accept the Offer (as defined below) if certificates representing
shares of common stock, par value $1.00 per share (the "Shares"), of Maxus
Energy Corporation, a Delaware corporation (the "Company") are not immediately
available or time will not permit all required documents to reach The Chase
Manhattan Bank (National Association) (the "Depositary") on or prior to the
Expiration Date (as defined in the Offer to Purchase), or the procedures for
delivery by book-entry transfer cannot be completed on a timely basis. This
Notice of Guaranteed Delivery may be delivered by hand or sent by facsimile
transmission or mail to the Depositary. See Section 3 of the Offer to Purchase.
 
                        THE DEPOSITARY FOR THE OFFER IS:
                            The Chase Manhattan Bank
                             (National Association)
                                 (201) 592-4672
<TABLE>
<CAPTION>
        By Mail:                   By Overnight Delivery:                       By Hand:
<S>                        <C>                                     <C>
        Box 3032           c/o Chase Securities Processing Corp.          (9:00 a.m.-5:00 p.m.
4 Chase MetroTech Center           Ft. Lee Executive Park                  New York City Time)
   Brooklyn, NY 11245          1 Executive Drive (6th Floor)       1 Chase Manhattan Plaza, Floor 1-B
                                     Ft. Lee, NJ 07024                 Nassau and Liberty Streets
                                                                           New York, NY 10081


                              By Facsimile Transmission: (201) 592-1674
                                 Confirm by Telephone: (201) 592-4672
</TABLE>
 
    DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO
A NUMBER OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
 
    THIS NOTICE OF GUARANTEED DELIVERY IS NOT TO BE USED TO GUARANTEE
SIGNATURES. IF A SIGNATURE ON A LETTER OF TRANSMITTAL IS REQUIRED TO BE
GUARANTEED BY AN "ELIGIBLE INSTITUTION" UNDER THE INSTRUCTIONS THERETO, SUCH
SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE PROVIDED IN THE
SIGNATURE BOX ON THE LETTER OF TRANSMITTAL.
<PAGE>
Ladies and Gentlemen:
 
    The undersigned hereby tenders to YPF Acquisition Corp., a Delaware
corporation (the "Purchaser"), upon the terms and subject to the conditions set
forth in the Offer to Purchase, dated March 3, 1995 (the "Offer to Purchase"),
and in the related Letter of Transmittal (which together constitute the
"Offer"), receipt of each of which is hereby acknowledged, the number of Shares
indicated below pursuant to the guaranteed delivery procedures set forth in
Section 3 of the Offer to Purchase.
Number of Shares: ________________ Shares
                                                Name(s) of Record
Holder(s): _____________
Certificate No(s). (if available):
                                                ________________________________
                                                ________________________________
                                                Address(es):____________________
                                                ________________________________
                                                ________________________________
If Share(s) will be tendered by book-entry
transfer, check one box.
                                                ________________________________
                                                Area Code and Telephone
Number(s): ______
/ / The Depository Trust Company
                                                ________________________________
/ / Midwest Securities Trust Company
/ / Philadelphia Depository Trust Company
                                                Signature(s): __________________
                                                ________________________________
                                                ________________________________
 
                     THE GUARANTEE BELOW MUST BE COMPLETED
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
      The undersigned, a firm that is a bank, broker, dealer, credit union,
  savings association or other entity which is a member in good standing of
  the Securities Transfer Agents Medallion Program, hereby (1) represents that
  the tender of Shares effected hereby complies with Rule 14e-4 under the
  Securities Exchange Act of 1934, as amended, and (2) guarantees to deliver
  to the Depositary, at one of its addresses set forth above, the certificates
  representing all tendered Shares, in proper form for transfer, or a
  Book-Entry Confirmation (as defined in the Offer to Purchase), together with
  a properly completed and duly executed Letter of Transmittal (or facsimile
  thereof), with any required signature guarantees, or, in the case of
  book-entry transfer of Shares, an Agent's Message (as defined in the Offer
  to Purchase), and any other documents required by the Letter of Transmittal
  within five New York Stock Exchange, Inc. ("NYSE") trading days after the
  date of execution of this Notice of Guaranteed Delivery.
 
<TABLE>
<S>                                              <C>
                 Name of Firm                                (Authorized Signature)
 
                    Address                                           Title
                                                                      Name:
                                                             (Please type or print)
        Area Code and Telephone Number                                Date:
</TABLE>
 
      NOTE: DO NOT SEND SHARE CERTIFICATES FOR SHARES WITH THIS NOTICE OF
   GUARANTEED DELIVERY. SHARE CERTIFICATES SHOULD BE SENT WITH YOUR LETTER OF
                                  TRANSMITTAL.

                                                                Exhibit (a)(4)

SALOMON BROTHERS INC
                                                        ------------------------
Seven World Trade Center
                                                            SALOMON BROTHERS INC
                                                        ------------------------
New York, New York 10048
(212) 783-6731
 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
 
                            MAXUS ENERGY CORPORATION
                                       AT
                              $5.50 NET PER SHARE
 
                                       BY
 
                             YPF ACQUISITION CORP.
 
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                              YPF SOCIEDAD ANONIMA
 
     THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
      CITY TIME, ON THURSDAY, MARCH 30, 1995, UNLESS THE OFFER IS EXTENDED
 
                                                                   March 3, 1995
 
To Brokers, Dealers, Commercial Banks,
Trust Companies and Other Nominees:
 
    We have been appointed by YPF Acquisition Corp., a Delaware corporation (the
"Purchaser") and a wholly owned subsidiary of YPF Sociedad Anonima, a sociedad
anonima organized under the laws of the Republic of Argentina ("YPF"), to act as
financial advisor and Dealer Manager in connection with the Purchaser's offer to
purchase all outstanding shares of common stock, par value $1.00 per share (the
"Shares"), of Maxus Energy Corporation, a Delaware corporation (the "Company"),
at a purchase price of $5.50 per Share, net to the seller in cash, without
interest thereon, upon the terms and subject to the conditions set forth in the
Offer to Purchase, dated March 3, 1995 (the "Offer to Purchase"), and in the
related Letter of Transmittal (which together constitute "Offer") enclosed
herewith.
 
    Holders of Shares whose certificates for such Shares (the "Share
Certificates") are not immediately available or who cannot complete the
procedures for book-entry transfer on a timely basis, must tender their Shares
according to the guaranteed delivery procedures set forth in Section 3 of the
Offer to Purchase.
 
    Please furnish copies of the enclosed materials to those of your clients for
whose accounts you hold Shares registered in your name or in the name of your
nominee.
 
    The Offer is conditioned upon, among other things, (a) Shares representing
not less than a majority of the Company's Voting Shares (as defined in the Offer
to Purchase) on a Fully Diluted Basis (as defined in the Offer to Purchase)
being validly tendered and not withdrawn prior to the expiration of the Offer
(the "Minimum Share Condition"), (b) the Company redeeming the Rights (as
defined in the Offer to Purchase) so that the Rights issued pursuant to the
Rights Agreement (as defined in the Offer to Purchase) will not become
exercisable, (c) the expiration or termination of the applicable waiting period
under the HSR Act (as defined in the Offer to Purchase), and (d) financing
occurring under the
<PAGE>
Loan Agreement contemplated by the commitment letter, dated February 24, 1995,
addressed to YPF and the Purchaser from The Chase Manhattan Bank (National
Association). The Offer is also subject to other terms and conditions contained
in the Offer to Purchase. See the Introduction and Sections 1, 14 and 15 of the
Offer to Purchase.
 
    Enclosed herewith for your information and forwarding to your clients are
copies of the following documents:
 
        1. The Offer to Purchase, dated March 3, 1995.
 
        2. The Letter of Transmittal to tender Shares for your use and for the
    information of your clients. Facsimile copies of the Letter of Transmittal
    may be used to tender Shares.
 
        3. The Notice of Guaranteed Delivery for Shares to be used to accept the
    Offer if certificates for Shares are not immediately available or if such
    certificates and all other required documents cannot be delivered to The
    Chase Manhattan Bank (National Association) (the "Depositary") by the
    Expiration Date or if the procedure for book-entry transfer cannot be
    completed by the Expiration Date.
 
        4. A letter to stockholders of the Company from Charles L. Blackburn,
    Chairman, President and Chief Executive Officer of the Company, together
    with the Solicitation/Recommendation Statement on Schedule 14D-9 filed with
    the Securities and Exchange Commission by the Company.
 
        5. A printed form of letter which may be sent to your clients for whose
    accounts you hold Shares registered in your name or in the name of your
    nominee, with space provided for obtaining such clients' instructions with
    regard to the Offer.
 
        6. Guidelines of the Internal Revenue Service for Certification of
    Taxpayer Identification Number on Substitute Form W-9.
 
        7. A return envelope addressed to the Depositary.
 
    YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS AS
PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS WILL
EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME, ON THURSDAY, MARCH 30, 1995,
UNLESS THE OFFER IS EXTENDED.
 
    In order to accept the Offer, a duly executed and properly completed Letter
of Transmittal and any required signature guarantees, or an Agent's Message (as
defined in the Offer to Purchase) in connection with a book-entry delivery of
Shares, and any other required documents should be sent to the Depositary and
Share Certificates representing the tendered Shares should be delivered to the
Depositary or such Shares should be tendered by book-entry transfer into the
Depositary's account maintained at one of the Book Entry Transfer Facilities (as
described in the Offer to Purchase), all in accordance with the instructions set
forth in the Letter of Transmittal and the Offer to Purchase.
 
    If holders of Shares wish to tender, but it is impracticable for them to
forward their Share Certificates or other required documents on or prior to the
Expiration Date or to comply with the book-entry transfer procedures on a timely
basis, a tender of Shares may be effected by following the guaranteed delivery
procedures specified in Section 3 of the Offer to Purchase.
 
    The Purchaser will not pay any commission or fees to any broker, dealer or
other person (other than the Dealer Manager and the Information Agent, as
described in the Offer to Purchase) for soliciting tenders of Shares pursuant to
the Offer. The Purchaser will, however, upon request, reimburse you for
customary clerical and mailing expenses incurred by you in forwarding any of the
enclosed
 
                                       2
<PAGE>
materials to your clients. The Purchaser will pay or cause to be paid any stock
transfer taxes payable on the transfers of Shares to it, except as otherwise
provided in Instruction 6 of the Letter of Transmittal.
 
    Any inquiries you may have with respect to the Offer should be addressed to
the Dealer Manager or the Information Agent, at their respective addresses and
telephone numbers set forth on the back cover of the Offer to Purchase. Requests
for additional copies of the enclosed materials may be directed to the
Information Agent.
 
                                          Very truly yours,
                                          SALOMON BROTHERS INC
                                          Dealer Manager
 
    NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU
OR ANY OTHER PERSON THE AGENT OF THE PURCHASER, THE DEALER MANAGER, THE COMPANY,
THE DEPOSITARY OR THE INFORMATION AGENT, OR ANY AFFILIATE OF ANY OF THEM, OR
AUTHORIZE YOU OR ANY OTHER PERSON TO MAKE ANY STATEMENT OR USE ANY DOCUMENT ON
BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER OTHER THAN THE ENCLOSED
DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.
 
                                       3



                                                                Exhibit (a)(5)


                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                            MAXUS ENERGY CORPORATION
                                       AT
                              $5.50 NET PER SHARE
 
                                       BY
                             YPF ACQUISITION CORP.
 
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                              YPF SOCIEDAD ANONIMA
 
  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
        TIME, ON THURSDAY, MARCH 30, 1995, UNLESS THE OFFER IS EXTENDED
 
  To our Clients:
 
    Enclosed for your consideration are the Offer to Purchase, dated March 3,
1995 (the "Offer to Purchase"), and the related Letter of Transmittal (which
together constitute the "Offer") relating to the offer by YPF Acquisition Corp.,
a Delaware corporation (the "Purchaser") and a wholly owned subsidiary of YPF
Sociedad Anonima, a sociedad anonima organized under the laws of the Republic of
Argentina ("YPF"), to purchase all outstanding shares of common stock, par value
$1.00 per share (the "Shares"), of Maxus Energy Corporation, a Delaware
corporation (the "Company") at a purchase price of $5.50 per Share, net to the
seller in cash, without interest thereon, upon the terms and subject to the
conditions set forth in the Offer to Purchase and in the related Letter of
Transmittal enclosed herewith. Holders of Shares whose certificates for such
Shares (the "Share Certificates") are not immediately available or who cannot
deliver all required documents to the Depositary on or prior to the Expiration
Date, or who cannot complete the procedures for book-entry transfer on a timely
basis, must tender their Shares according to the guaranteed delivery procedures
set forth in Section 3 of the Offer to Purchase.
 
    WE ARE THE HOLDER OF RECORD OF SHARES HELD BY US FOR YOUR ACCOUNT. A TENDER
OF SUCH SHARES CAN BE MADE ONLY BY US AS THE HOLDER OF RECORD AND PURSUANT TO
YOUR INSTRUCTIONS. THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR YOUR
INFORMATION ONLY AND CANNOT BE USED BY YOU TO TENDER SHARES HELD BY US FOR YOUR
ACCOUNT.
 
    Accordingly, we request instructions as to whether you wish to have us
tender on your behalf any or all Shares held by us for your account pursuant to
the terms and conditions set forth in the Offer.
 
    Please note the following:
 
        1. The tender price is $5.50 per Share, net to you in cash without
    interest thereon, upon the terms and subject to the conditions set forth in
    the Offer.
 
        2. The Offer is being made for all Shares.
 
        3. The Offer is conditioned upon, among other things, (a) Shares
    representing not less than a majority of the Company's Voting Shares (as
    defined in the Offer to Purchase) on a Fully Diluted Basis (as defined in
    the Offer to Purchase) being validly tendered and not withdrawn prior to the
    expiration of the Offer (the "Minimum Share Condition"), (b) the Company
    redeeming the Rights (as defined in the Offer to Purchase) so that the
    Rights issued pursuant to the Rights Agreement (as defined in the Offer to
    Purchase) will not become exercisable, (c) the expiration or termination of
    the applicable waiting period under the HSR Act (as defined in
<PAGE>
    the Offer to Purchase), and (d) financing occurring under the Loan Agreement
    contemplated by the commitment letter, dated February 24, 1995, addressed to
    YPF and the Purchaser from The Chase Manhattan Bank (National Association).
    The Offer is also subject to other terms and conditions contained in the
    Offer to Purchase. See the Introduction and Sections 1, 14 and 15 of the
    Offer to Purchase.
 
        4. Tendering stockholders will not be obligated to pay brokerage fees or
    commissions or, except as otherwise provided in Instruction 6 of the Letter
    of Transmittal, stock transfer taxes on the purchase of Shares by the
    Purchaser pursuant to the Offer.
 
        5. The Offer and withdrawal rights will expire at 12:00 midnight, New
    York City time, on Thursday, March 30, 1995, unless the Offer is extended.
 
        6. Payment for Shares purchased pursuant to the Offer will in all cases
    be made only after timely receipt by The Chase Manhattan Bank (National
    Association) (the "Depositary") of (a) Share Certificates for such Shares or
    timely confirmation of the book-entry transfer of such Shares into the
    account maintained by the Depositary at The Depository Trust Company,
    Midwest Securities Trust Company or Philadelphia Depository Trust Company
    (collectively, the "Book-Entry Transfer Facilities"), pursuant to the
    procedures set forth in Section 3 of the Offer to Purchase, (b) the Letter
    of Transmittal (or a facsimile thereof), properly completed and duly
    executed, with any required signature guarantees or an Agent's Message (as
    defined in the Offer to Purchase), in connection with a book-entry transfer,
    and (c) any other documents required by the Letter of Transmittal.
    Accordingly, payment may not be made to all tendering stockholders at the
    same time depending upon when Share Certificates or confirmations of
    book-entry transfer of such Shares into the Depositary's account at a
    Book-Entry Transfer Facility are actually received by the Depositary.
 
    If you wish to have us tender any or all of the Shares held by us for your
account, please so instruct us by completing, executing, detaching and returning
to us the instruction form set forth below. If you authorize the tender of your
Shares, all such Shares will be tendered unless otherwise specified below. An
envelope to return your instructions to us is enclosed. Your instructions should
be forwarded to us in ample time to permit us to submit a tender on your behalf
prior to the expiration of the Offer.
 
    The Offer is not being made to (nor will tenders be accepted from or on
behalf of) holders of Shares residing in any jurisdiction in which the making of
the Offer or the acceptance thereof would not be in compliance with the
securities, blue sky or other laws of such jurisdiction. However, the Purchaser
may, in its discretion, take such action as it may deem necessary to make the
Offer in any jurisdiction and extend the Offer to holders of Shares in such
jurisdiction.
 
    In any jurisdiction where the securities, blue sky or other laws require the
Offer to be made by a licensed broker or dealer, the Offer is being made on
behalf of the Purchaser by Salomon Brothers Inc, the Dealer Manager for the
Offer, or one or more registered brokers or dealers that are licensed under the
laws of such jurisdiction.
<PAGE>
               INSTRUCTIONS WITH RESPECT TO THE OFFER TO PURCHASE
                      FOR CASH ALL SHARES OF COMMON STOCK
                                       OF
                            MAXUS ENERGY CORPORATION
 
    The undersigned acknowledge(s) receipt of your letter and the enclosed Offer
to Purchase, dated March 3, 1995 (the "Offer to Purchase"), and the related
Letter of Transmittal (which together constitute the "Offer") in connection with
the offer by YPF Acquisition Corp., a Delaware corporation (the "Purchaser") and
a wholly owned subsidiary of YPF Sociedad Anonima, a sociedad anonima organized
under the laws of the Republic of Argentina, to purchase all outstanding shares
of common stock, par value $1.00 per share (the "Shares"), of Maxus Energy
Corporation, a Delaware corporation (the "Company") at a purchase price of $5.50
per Share, net to the seller in cash, without interest thereon, upon the terms
and subject to the conditions set forth in the Offer to Purchase.
 
    This will instruct you to tender to the Purchaser the number of Shares
indicated below (or if no number is indicated below, all Shares), which are held
by you for the account of the undersigned, upon the terms and subject to the
conditions set forth in the Offer.
 
   Number of Shares to Be Tendered:
    _________________________ Shares
 
                                   SIGN HERE
Signature(s): __________________________________________________________________
 Print
Name(s): _______________________________________________________________________
 Print
Address(es): ___________________________________________________________________
 Area Code and Telephone
 Number(s): ____________________________________________________
 Taxpayer Identification or Social Security
 Number(s): ______________________________________


                                                                Exhibit (a)(6)


            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINATION THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER.--Social Security numbers have nine digits separate by two hyphens: i.e.
000-00-0000. Employer identification numbers have digits separated by only one
hyphen: i.e. 00-0000000. The table below will help determine the number to give
the payer.
 
- -----------------------------------------------------
 
                               GIVE THE
                               SOCIAL SECURITY
                               NUMBER OF--
FOR THIS TYPE OF ACCOUNT:
- -----------------------------------------------------
 
   1.  An individual's         The individual
       account
 
   2.  Two or more             The actual owner of
       individuals (joint      the account or, if
       account)                combined funds, any
                               one of the
                               individuals(1)
 
   3.  Husband and wife        The actual owner of
       (joint account)         the account or, if
                               joint funds, either
                               person(1)
 
   4.  Custodian account of    The minor(2)
       a minor (Uniform Gift
       to Minors Act)
 
   5.  Adult and minor         The adult or, if the
       (joint account)         minor is the only
                               contributor, the
                               minor(1)
 
   6.  Account in the name     The ward, minor, or
       of guardian or          incompetent person(3)
       committee for a
       designated ward,
       minor, or incompetent
       person
 
   7.  A. The usual            The grantor-trustee(1)
         revocable savings
          trust account
          (grantor is also
          trustee)
 
       B. So-called trust      The actual owner(1)
          account that is
          not a legal or
          valid trust under
          State law
 
- -----------------------------------------------------
                               GIVE THE EMPLOYER
                               IDENTIFICATION
                               NUMBER OF--
FOR THIS TYPE OF ACCOUNT:
- -----------------------------------------------------

   8.  Sole proprietorship     The owner(4)
       account
 
   9.  A valid trust,          Legal entity (Do not
       estate, or pension      furnish the
       trust                   identifying number of
                               the personal
                               representative or
                               trustee unless the
                               legal entity itself is
                               not designated in the
                               account title.)(5)
 
  10.  Corporate account       The corporation
 
  11.  Religious,              The organization
       charitable, or
       educational
       organization account
 
  12.  Partnership account     The partnership
       held in the name of
       the business
 
  13.  Association, club, or   The organization
       other tax exempt
       organization
 
  14.  A broker or             The broker or
       registered nominee      nominee
 
  15.  Account with the        The public entity
       Department of
       Agriculture in the
       name of a public
       entity (such as a
       State or local
       government, school
       district, or prison)
       that receives
       agricultural program
       payments
- -----------------------------------------------------
 
(1) List first and circle the name of the person whose number you furnish.
 
(2) Circle the minor's name and furnish the minor's social security number.
 
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
 
(4) Show the name of the owner.
 
(5) List first and circle the name of the legal trust, estate or pension trust.
 
NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.
<PAGE>
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
                                     PAGE 2
 
OBTAINING A NUMBER
 
If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number, at the local office of the
Social Security Administration or the Internal Revenue Service (the "IRS") and
apply for a number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
 
Payees specifically exempted from backup withholding on ALL payments include the
following:
 
 . A corporation.
 
 . A financial institution.
 
 . An organization exempt from tax under section  501(a), or an individual
   retirement plan.
 
 . The United States or any agency or instrumentality thereof.
 
 . A State, the District of Columbia, a possession of the United States, or any
   subdivision or instrumentality thereof.
 
 . A foreign government, a political subdivision of a foreign government, or any
   agency or instrumentality thereof.
 
 . An international organization or any agency or instru mentality thereof.
 
 . A registered dealer in securities or commodities reg istered in the U.S. or a
   possession of the U.S.
 
 . A real estate investment trust.
 
 . A common trust fund operated by a bank under sec tion 584(a).
 
 . An exempt charitable remainder trust, or a non- exempt trust described in
   section 4947(a)(1).
 
 . An entity registered at all times under the Investment  Company Act of 1940.
 
 . A foreign central bank of issue.
 
   Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
 
 . Payments to nonresident aliens subject to withholding  under section 1441.
 
 . Payments to partnerships not engaged in a trade or business in the U.S. and
   which have at least one  nonresident partner.
 
 . Payments of patronage dividends where the amount  received is not paid in
   money.
 
 . Payments made by certain foreign organizations.
 
 . Payments made to a nominee.
 
   Payments of interest not generally subject to backup withholding include the
following:
 
 . Payments of interest on obligations issued by individuals. NOTE: You may be
   subject to backup withholding if this interest is $600 or more and is paid in
   the course of the payer's trade or business and you have not provided your
   correct taxpayer identification num ber to the payer.
 
 . Payments of tax-exempt interest (including exempt- interest dividends under
   section 852).
 
 . Payments described in section 6049(b)(5) to nonresi dent aliens.
 
 . Payments on tax-free covenant bonds under section 1451.
 
 . Payments made by certain foreign organizations.
 
 . Payments made to a nominee.
 
Exempt payees described above should file Form W-9 to avoid possible erroneous
backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER
IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND RETURN IT TO
THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS, ALSO
SIGN AND DATE THE FORM.
 
   Certain payments other than interest, dividends, and patronage dividends that
are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A(a),
6045, and 6050A.
 
PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. Beginning January 1, 1984, payers
must generally withhold 20% of taxable interest, dividend, and certain other
payments to a payee who does not furnish a taxpayer identification number to a
payer. Certain penalties may also apply.
 
PENALTIES
 
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER.--If you fail
to furnish your taxpayer identification number to a payer, you are subject to a
penalty of $50 for each such failure unless your failure is due to reasonable
cause and not to willful neglect.
 
(2) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS.--If you fail to
include any portion of an includible payment for interest, dividends, or
patronage dividends in gross income, such failure will be treated as being due
to negligence and will be subject to a penalty of 5% on any portion of any
under-payment attributable to that failure unless there is clear and convincing
evidence to the contrary.
 
(3) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.
 
(4) CRIMINAL PENALTY FOR FALSIFYING INFORMATION.--
Falsifying certifications or affirmations may subject you to criminal penalties
including fines and/or imprisonment.
 
                  FOR ADDITIONAL INFORMATION CONTACT YOUR TAX
                   CONSULTANT OR THE INTERNAL REVENUE SERVICE


                                                                Exhibit (a)(7)


This announcement is neither an offer to purchase nor a solicitation of an
offer to sell Shares. The Offer is made solely by the Offer to Purchase, dated
March 3, 1995, and the related Letter of Transmittal, and is being made to all
holders of Shares. The Purchaser is not aware of any state where the making of
the Offer is prohibited by administrative or judicial action pursuant to any
valid state statute. If the Purchaser becomes aware of any valid state statute
prohibiting the making of the Offer or the acceptance of Shares pursuant
thereto, the Purchaser will make a good faith effort to comply with any such
state statute or seek to have such statute declared inapplicable to the Offer.
If, after such good faith effort, the Purchaser cannot comply with any such
state statute, the Offer will not be made to (nor will tenders be accepted
from or on behalf of) holders of Shares in such state. In any jurisdiction
where the securities, blue sky or other laws require the Offer to be made by a
licensed broker or dealer, the Offer shall be deemed to be made on behalf of
the Purchaser by one or more registered brokers or dealers licensed under the
law of such jurisdiction.
Notice of Offer to Purchase for Cash

All Outstanding Shares of Common Stock
of
Maxus Energy Corporation
at
$5.50 Net Per Share
by
YPF Acquisition Corp.
a wholly owned subsidiary
of
YPF Sociedad Anonima

YPF Acquisition Corp., a Delaware corporation (the "Purchaser") and a wholly
owned subsidiary of YPF Sociedad Anonima, a sociedad anonima organized under the
laws of the Republic of Argentina ("YPF"), is offering to purchase all
outstanding shares of Common Stock, par value $1.00 per share (the "Shares"), of
Maxus Energy Corporation, a Delaware corporation (the "Company"), at $5.50 per
Share, net to the seller in cash, without interest thereon, upon the terms and
subject to the conditions set forth in the Offer to Purchase, dated March 3,
1995 (the "Offer to Purchase"), and in the related Letter of Transmittal (which
together constitute the "Offer"). Following the Offer, the Purchaser intends to
effect the Merger described below.

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON THURSDAY, MARCH 30, 1995 UNLESS EXTENDED.

The Offer is conditioned upon, among other things, there being validly tendered
and not withdrawn by the Expiration Date (as defined below) a number of Shares
which represents not less than a majority of the Company's Voting Shares
outstanding on a fully diluted basis. "Voting Shares" is defined to mean the
Shares and the Company's $4.00 Cumulative Convertible Preferred Stock, par
value $1.00 per Share (the "$4.00 Preferred Stock"). The Offer is also subject
to certain other conditions contained in the Offer to Purchase, including that
funding shall have occurred under a Loan Agreement contemplated by the bank
commitment letter received by YPF and the Purchaser.

The purpose of the Offer and the Merger is to enable YPF to acquire control of,
and the entire common equity interest in, the Company. The Offer is being made
pursuant to an Agreement of Merger, dated as of February 28, 1995 (the "Merger
Agreement"), among YPF, the Purchaser and the Company. The Merger Agreement
provides, among other things, for the commencement of the Offer by the Purchaser
and further provides that, subject to the satisfaction or waiver of certain
conditions, the Purchaser will be merged with and into the Company (the
"Merger"), with the Company surviving the Merger. Pursuant to the Merger, each
then-outstanding Share not owned by YPF, the Purchaser or any other direct or
indirect subsidiary of YPF (other than Shares held in the treasury of the
Company and Shares held by holders who perfect their appraisal rights as
described in the Offer to Purchase) will be converted into a right to receive in
cash an amount per Share equal to the highest price per Share paid pursuant to
the Offer, without interest thereon, upon surrender of the certificate formerly
representing such Share. Pursuant to the Merger, each share of $4.00 Preferred
Stock, $9.75 Cumulative Convertible Preferred Stock, and $2.50 Cumulative
Preferred Stock will remain outstanding, and have the identical powers,
preferences, rights, qualifications, limitations and restrictions as such shares
of Preferred Stock presently have, except, in the case of the $9.75 Preferred
Stock, as described in the Offer to Purchase.

The Board of Directors of the Company has determined that the Offer and the
Merger are in the best interests of the Company and its stockholders and
recommends that holders of shares accept the Offer and tender their Shares
pursuant to the Offer. For purposes of the Offer, the Purchaser will be deemed
to have accepted for payment, and thereby purchased, Shares validly tendered, if
and when the Purchaser gives oral or written notice to The Chase Manhattan Bank
(National Association), as the Depositary, of the Purchaser's acceptance of such
Shares for payment pursuant to the Offer. In all cases, upon the terms and
subject to the conditions of the Offer, payment for Shares purchased pursuant to
the Offer will be made by deposit of the purchase price therefor with the
Depositary, which will act as agent for tendering stockholders for the purpose
of receiving payment from the Purchaser and transmitting payment to validly
tendering stockholders. Under no circumstances will interest on the purchase
price for Shares be paid by the Purchaser. In all cases, payment for Shares
purchased pursuant to the Offer will be made only after timely receipt by the
Depositary of (i) certificates representing Shares (the "Share Certificates")
(or a timely Book-Entry confirmation), pursuant to the procedures set forth in
Section 3 of the Offer to Purchase, (ii) the Letter of Transmittal (or a
facsimile thereof), properly completed and duly executed, with any required
signature guarantees or an Agent's Message (as defined in the Offer to Purchase)
in connection with a book-entry transfer, and (iii) any other documents required
by the Letter of Transmittal. Upon the terms and subject to the conditions of
the Offer, all Shares validly tendered will be accepted for purchase on the
Expiration Date.

The term "Expiration Date" means 12:00 midnight, New York City time, on
Thursday, March 30, 1995, unless and until the Purchaser (subject to the terms
of the Merger Agreement) shall have extended the period of time during which the
Offer is open, in which event the term "Expiration Date" shall refer to the
latest time and date at which the Offer, as so extended by the Purchaser, will
expire. The Purchaser expressly reserves the right, at any time or from time to
time, subject to the terms of the Merger Agreement, to extend the period of time
during which the Offer is open and thereby delay acceptance for payment of, and
the payment for, any Shares, by giving oral or written notice of such extension
to the Depositary and by making a public announcement thereof by no later than
9:00 a.m. New York City time, on the next business day after the previously
scheduled Expiration Date in accordance with the announcement requirements of
Rule 14d-4(c) under the Securities Exchange Act of 1934, as amended. During any
such extension, all Shares previously tendered and not withdrawn will remain
subject to the Offer, subject to the right of a tendering stockholder to
withdraw such stockholder's Shares. Without limiting the manner in which the
Purchaser may choose to make any public announcement, the Purchaser currently
intends to make such announcement by issuing a press release to the Dow Jones
News Service.

Except as otherwise provided below, tenders of Shares made pursuant to the Offer
are irrevocable. Shares tendered pursuant to the Offer may be withdrawn at any
time prior to the Expiration Date and, unless theretofore accepted for payment
by the Purchaser, may also be withdrawn at any time after May 1, 1995. For a
withdrawal to be effective, a written, telegraphic or facsimile transmission
notice of withdrawal must be timely received by the Depositary at one of its
addresses set forth on the back cover of the Offer to Purchase. Any such notice


<PAGE>


of withdrawal must specify the name of the person who tendered the Shares to be
withdrawn, the number of shares to be withdrawn, and the name of the registered
holder, if different from that of the person who tendered such Shares. If
certificates for the Shares have been delivered or otherwise identified to the
Depositary, then (except in the case of Shares tendered for the account of an
Eligible Institution, as defined under "Procedures for Tendering Shares" in the
Offer to Purchase) prior to the release of such certificates, the tendering
stockholder must also submit the serial numbers shown on the particular
certificates evidencing the Shares to be withdrawn, and the signature on the
notice of withdrawal must be guaranteed by an Eligible Institution. If Shares
have been tendered pursuant to the procedure for book-entry transfer set forth
under "Procedures for Tendering Shares" in the Offer to Purchase, the notice of
withdrawal must also specify the name and number of the account at the
appropriate Book-Entry Transfer Facility to be credited with the withdrawn
Shares. All questions as to the form and validity (including time of receipt) of
notices of withdrawal will be determined by the Purchaser, in its sole
discretion, whose determination shall be final and binding. None of the
Purchaser, YPF, the Company, the Dealer Manager (as set forth below), the
Depositary, the Information Agent (as set forth below) or any other person will
be under any duty to give notification of any defects or irregularities in any
notice of withdrawal or incur any liability for failing to give such
notification. Any Shares properly withdrawn will be deemed not validly tendered
for purposes of the Offer. However, withdrawn Shares may be tendered again by
following any of the procedures described under "Procedures for Tendering
Shares" in the Offer to Purchase.

The Company has provided the Purchaser with the Company's stockholder list and
security position listings for the purpose of disseminating the Offer to holders
of Shares. The Offer to Purchase, the related Letter of Transmittal and other
relevant materials will be mailed to record holders of Shares and will be
furnished to brokers, dealers, commercial banks, trust companies and similar
persons whose names, or the names of whose nominees, appear on the Company's
stockholder list or, if applicable, who are listed as participants in a clearing
agency's security position listing, for subsequent transmittal to beneficial
owners of Shares by the Purchaser. The information required to be disclosed by
Rule 14d-6(e)(1)(vii) of the General Rules and Regulations under the Securities
Exchange Act of 1934, as amended, is contained in the Offer to Purchase and is
incorporated herein by reference.

The Offer to Purchase and the related Letter of Transmittal contain important
information which should be read carefully before any decision is made with
respect to the Offer.

Requests for copies of the Offer to Purchase, the Letter of Transmittal and
other tender offer documents may be directed to the Information Agent, and
copies will be furnished promptly at the Purchaser's expense. Questions or
requests for assistance may be directed to the Information Agent or the Dealer
Manager. Except as set forth under "Fees and Expenses" in the Offer to Purchase,
the Purchaser will not pay any fees or commissions to any broker or dealer or
other person (other than the Dealer Manger, the Depositary and the Information
Agent) in connection with the solicitation of tenders of Shares pursuant to the
Offer.

The Information Agent for the Offer is:

D. F. King & Co., Inc.
United States
77 Water Street
New York, New York 10005
(212) 269-5550 (Collect)
(800) 488-8035 (Toll Free)

Europe
Royex House, Aldermanbury Square
London, England EC2V 7HR
(44) 71 600 5005 (Collect)

The Dealer Manager for the Offer is:

Salomon Brothers Inc
Seven World Trade Center
New York, NY 10048
Call (212) 783-6731 (collect)
March 3, 1995





                                                                Exhibit (b)(1)

                                             February 24, 1995


          YPF Sociedad Anonima
          Avenida Pte R. Saenz Pena 777
          1364 Buenos Aires, Argentina


          Ladies and Gentlemen:

                    You ("Sponsor") have advised The Chase Manhattan Bank
                          -------
          (National Association) ("Chase" and, together with its
                                   -----
          affiliates, the "Chase Entities") that you propose to acquire the
                           --------------
          company which we have code-named Cowboy (the "Target") in a
                                                        ------
          transaction pursuant to which a newly-formed indirect subsidiary
          of Sponsor (the "Company") will make a cash tender offer (the
                           -------
          "Tender Offer") for all of the issued and outstanding shares of
           ------------
          common stock of Target (the "Target Shares").  All of the capital
                                       -------------
          stock of the Company will be owned by a newly-formed corporation
          ("Holdings") and all of the capital stock of Holdings will be
            --------
          owned by Sponsor.


                    We understand that the Tender Offer is to be
          conditioned upon, among other things, there being validly
          tendered prior to the expiration of the Tender Offer, and not
          withdrawn, Target Shares representing not less than 50.1% (on a
          fully diluted basis) of the outstanding Target Shares and the
          Target's outstanding $4.00 Cumulative Convertible Preferred
          shares (the "Voting Preferred Shares"), but in an amount not less
                       -----------------------
          than the number of Target Shares and Voting Preferred Shares
          required to permit the Merger referred to below to occur
          promptly.


<PAGE>


                                        - 2 -


                    As promptly as practicable following the purchase of
          Target Shares pursuant to the Tender Offer (the "Tender Offer
                                                           ------------
          Closing"), the Company will merge (the "Merger" and, together
          -------                                 ------
          with the Tender Offer, the "Acquisition") with and into Target
                                      -----------
          pursuant to an agreement of merger (the "Merger Agreement") to be
                                                   ----------------
          entered into by Target, the Company and Sponsor prior to the
          commencement of the Tender Offer.  By virtue of the Merger, the
          holders of Target Shares (other than the Company and the
          stockholders of Target who perfect their appraisal rights under
          Delaware law) will be entitled to receive cash in an amount equal
          to the price paid for each Target Share pursuant to the Tender
          Offer.


                    Sponsor has requested that senior financing aggregating
          up to U.S. $800,000,000 (the "Senior Facilities") be made
                                        -----------------
          available to Sponsor, the Company and the other entities
          specified in the Term Sheets referred to below to provide
          financing for (i) the actual purchase price of the Target Shares,
          (ii) fees, commissions and expenses incurred and paid by Sponsor
          or the Company in connection with the Acquisition in an aggregate
          amount not in excess of U.S. $35,000,000 and (iii) poison pill
          and golden parachute payments payable by Target in connection
          with the Acquisition and paid by Sponsor or the Company.  Sponsor
          agrees that total funds of up to U.S. $800,000,000 are required
          to consummate the Acquisition and related transactions and that
          no external debt financing will be required for such purposes
          other than the Senior Facilities. 


                    Chase is pleased to offer to commit to provide the full
          amount of the Senior Facilities, all on the terms conditions set
          forth herein, in the Term Sheets attached hereto as Exhibit A and
          Exhibit B (collectively, the "Term Sheets") and in the letter of
                                        -----------
          even date herewith addressed by Chase to Sponsor providing, among
          other things, for certain fees relating to the Senior Facilities
          (the "Fee Letter").  Subject to terms and conditions set forth
                ----------
          herein and in the Fee Letter, U.S. $200,000,000 will be made
          available to Sponsor pursuant to the terms and conditions set
          forth in Exhibit B and up to U.S. $600,000,000 will be made
          available to the Company, Target and the borrowing subsidiaries
          of Target pursuant to the terms and conditions set forth in


<PAGE>


                                        - 3 -


          Exhibit A.  Chase reserves the right to syndicate directly or
          through one or more of Chase Securities, Inc., Chase Investment
          Bank, Ltd. and Chase Manhattan Asia Limited (collectively with
          Chase, the "Chase Participants")), all or a portion of the Senior
                      ------------------
          Facilities on the same terms and conditions as are set forth
          herein and in the Term Sheets (other than with respect to rights
          and obligations which relate only to Chase) to a group of banks
          and/or other financial institutions acceptable to Chase
          (including Chase, the "Lenders") and the Sponsor.  Chase shall be
                                 -------
          relieved of its obligation to provide the Senior Facilities to
          the extent that at any time Sponsor accepts the written offers of
          Lenders other than Chase to provide a portion of the Senior
          Facilities (such acceptance not to be unreasonably withheld or
          delayed).  Chase agrees that at all times subsequent to the
          initial extension of credit under the Senior Facilities and prior
          to the date which is three days following the consummation of the
          Merger, Chase and its affiliates will hold an aggregate of not
          less than 20% of the aggregate principal amount of the Senior
          Facilities.


                    Chase has submitted this letter after reviewing certain
          historical financial statements relating to Sponsor and its
          subsidiaries and Target and its subsidiaries and certain other
          information provided to Chase by Sponsor.  Chase may terminate
          its obligations under the preceding paragraph to provide the
          Senior Facilities if (the conditions set forth in clauses (i)
          through (xi) below, collectively the "Conditions"):  (i) the
                                                ----------
          terms of the proposed Tender Offer or Merger are changed in any
          respect determined by Chase to be material; (ii) (a) any
          information with respect to Midgard Energy Company, Natomas
          Energy Company, Maxus Northwest Java, Inc. or Maxus Southeast
          Sumatra Inc., or the ability of such subsidiaries to engage in
          the transactions contemplated by Tranche 2 or Tranche 3 (as
          defined in the Term Sheets) submitted to Chase in writing proves
          to have been inaccurate, incomplete or misleading in any respect
          determined by Chase to be material with respect to each of such
          subsidiaries taken as a whole or (b) any other information, taken
          as a whole, submitted to Chase in writing proves to have been
          inaccurate, incomplete or misleading in any respect determined by
          Chase to be material, in each case, other than any such


<PAGE>


                                        - 4 -


          information which, at the time of delivery, Sponsor indicates in
          writing is inaccurate; (iii) any change occurs after September
          30, 1994, or any additional information is disclosed to or
          discovered by Chase or its counsel, which Chase deems materially
          adverse, in respect of the condition (financial or otherwise),
          business, operations, assets, nature of assets or liabilities of
          any of (a) Sponsor and its subsidiaries (taken as a whole) (which
          shall include, without limitation, the investment ratings of any
          of the Sponsor's securities being downgraded or being put on
          "credit watch" or "credit review" with negative implications by
          any nationally recognized statistical rating organization), (b)
          Target and its subsidiaries (taken as a whole) or (c) the
          intended Target borrowing subsidiaries or any of their respective
          subsidiaries (which shall include, without limitation, the
          investment ratings of the government of Indonesia being
          downgraded or being put in "credit watch " or "credit review"
          with negative implications by a nationally recognized statistical
          rating organization at any time after the consummation of the
          Merger); (iv) any of the fees payable to Chase pursuant to the
          Fee Letter are not paid when due; (v) any condition to Chase's
          obligations set forth herein or in the Term Sheets cannot be
          satisfied; (vi) (a) to the extent the Merger Agreement and Tender
          Offer are not executed in the forms of "the Andrews & Kurth Mark-
          Up 1/27/94" furnished to Chase, unless Chase has approved the
          changes from such draft or (b) the executed Merger Agreement or
          Tender Offer (or other key acquisition documents) are modified
          subsequent to the "the Andrews & Kurth Mark-Up 1/27/94" furnished
          to Chase or waived in any respect determined by Chase to be
          material, unless approved by Chase; (vii) the Tender Offer
          conditions have not been satisfied in any respect determined by
          Chase to be material without modification or waiver, unless
          approved by Chase; (viii) Chase determines that any litigation or
          other proceedings seeking to enjoin or in any way modify or
          affect the Tender Offer or the Merger has a material adverse
          effect on the Merger, the Tender Offer, the Company, the Target
          or any of their respective subsidiaries or any of the Senior
          Facilities; or (ix) any of Sponsor's or Target's existing debt,
          preferred stock documents or other written contractual
          arrangements prohibit the Acquisition or the borrowings or
          security interests under any of the Senior Facilities or


<PAGE>


                                        - 5 -


          otherwise adversely affect the consummation of the transactions
          contemplated hereby, unless the provisions of such documents or
          arrangements which prohibit the consummation of such transactions
          have been waived or modified to the satisfaction of Chase
          (Sponsor has represented to Chase that no such prohibitions exist
          with respect to Sponsor or any of its subsidiaries).  In
          addition, Chase's obligations under this letter are subject to
          the negotiation, execution and delivery of mutually satisfactory
          financing and security documentation reflecting, without
          limitation, the provisions of the Term Sheets.


                    Sponsor hereby indemnifies and holds harmless each of
          the Chase Participants and the other Lenders and each director,
          officer, employee and affiliate thereof (each, an "indemnified
                                                             -----------
          person") from and against any and all losses, claims, damages,
          ------
          liabilities (or actions or other proceedings commenced or
          threatened in respect thereof) and reasonable expenses that arise
          out of, result from or in any way relate to this letter, the Term
          Sheet or the Fee Letter, the use or intended use of the Senior
          Facilities, or in connection with the Acquisition or the other
          transactions contemplated hereby or the provision or syndication
          of the Senior Facilities, and Sponsor hereby agrees to reimburse
          each indemnified person, upon its demand, for any reasonable
          legal or other expenses incurred in connection with
          investigating, defending or participating in any such loss,

          claim, damage, liability or action or other proceeding (whether
          or not such indemnified person is a party to any action or
          proceeding out of which any such expenses arise), other than any
          of the foregoing claimed by any indemnified person to the extent
          finally determined by a court of competent jurisdiction to be
          incurred directly and primarily by reason of the gross negligence
          or willful misconduct of such indemnified person; provided,
                                                            --------
          however, Sponsor shall not be required to pay for more than one
          -------
          counsel for all indemnified parties in any single jurisdiction
          unless such indemnified parties have conflicting interests. 
          Neither any Chase Participant nor any other Lender shall be
          responsible or liable to the Sponsor, the Company, Holdings or
          any other person or entity for any consequential damages that may
          be alleged as a result of this letter or any other transaction
          referred to herein.  In addition, Sponsor hereby agrees to 


<PAGE>


                                        - 6 -


          reimburse Chase from time to time upon Chase's demand for Chase's
          reasonable out-of-pocket costs and expenses (including, without
          limitation, reasonable legal fees and expenses, appraisal fees
          and printing, reproduction, document delivery, communication,
          publicity and travel costs) incurred in connection with this
          letter and the other transactions contemplated hereby (including,
          without limitation, the syndication of the Senior Facilities and
          the preparation, review, negotiation, execution and delivery of
          this letter, the Term Sheet, the Fee Letter, the definitive
          financing agreements and the other documents relating to the
          Senior Facilities and/or the Acquisition) in accordance with a
          budget (as to legal expenses) and guidelines to be agreed upon by
          Sponsor and Chase.  Sponsor's obligations under this paragraph
          shall survive any termination of the obligations of Chase under
          this letter and shall be effective regardless of whether the
          definitive financing agreements are executed.  The foregoing
          provisions of this paragraph shall be in addition to any rights
          that any of the Chase Entities or any other indemnified person
          may have at common law or otherwise.


                    This letter is delivered to Sponsor upon the condition
          that, prior to its acceptance of this offer, neither the
          existence of this letter, the Term Sheets or the Fee Letter nor
          any of their contents shall be disclosed by it without the prior
          written consent of Chase except (a) as may be compelled to be
          disclosed in a judicial or administrative proceeding or as
          otherwise required by law, (b) in connection with any enforcement
          by Sponsor of its rights under this letter agreement, (c) on a
          confidential and "need to know" basis, to its directors,
          officers, employees, advisors and agents or (d) on a confidential
          and "need to know" basis, to the Target, its directors, officers,
          employees, advisors and agents.  If Sponsor makes or permits any
          such disclosure in violation of this paragraph, Sponsor shall be
          deemed to have accepted and agreed to this letter and the Term
          Sheets and be obligated to Chase as provided herein and therein. 
          Sponsor further agrees that after it has accepted this offer it
          will not disclose the Term Sheets, or any documents referred to
          in the Term Sheets or its contents except as permitted under
          clause (a), (b), (c) or (d) of the first sentence of this
          paragraph.  


<PAGE>


                                        - 7 -


                    In accordance with market practice, an information
          package containing relevant information relating to the Senior
          Facilities, Sponsor and Target and their respective subsidiaries,
          the Acquisition and the other transactions and entities referred
          to herein and in the Term Sheets will be provided, on a
          confidential basis, by Sponsor to potential lenders and
          participants.  Chase will be pleased to assist Sponsor in the
          preparation of this package.  Sponsor and the Company will
          cooperate with Chase in effecting the syndication of the Senior
          Facilities (including participation by officers requested by
          Chase (which may include the Chief Executive Officer and the
          Chief Financial Officer of the Sponsor) in "roadshows" or other
          meetings with potential lenders and participants).  

                    Sponsor acknowledges that the Chase Entities may be
          providing debt financing, equity capital or other services
          (including financial advisory services) to other persons or
          entities in respect of which Sponsor or its affiliates may have
          conflicting interests.  None of the Chase Entities will use
          confidential information obtained from Sponsor or its affiliates
          by virtue of the transactions contemplated by this letter or
          their other relationships with Sponsor and its affiliates in
          connection with the performance by any such Chase Entity of
          services for other companies, and nor will any Chase Entity
          furnish any such information to any person or entity other than a
          Chase Participant; provided that nothing herein shall limit the
                             --------
          disclosure of any such information (i) to the extent required by
          statute, rule, regulation or judicial process, (ii) to counsel
          for any of the Lenders or Chase, (iii) to bank examiners,
          auditors or accountants, (iv) in connection with any litigation
          to which any one or more of the Lenders or Chase is a party, or
          (vi) to any Lender (or prospective Lender) so long as such
          assignee or participant (or prospective assignee or participant)
          first executes and delivers to Chase a confidentiality agreement
          containing the provisions set forth in this sentence.  Sponsor
          also acknowledges that none of the Chase Entities have any
          obligation to use in connection with the transactions
          contemplated by this letter, or to furnish to Sponsor or any of
          its affiliates, confidential information obtained from any such
          person or entity.


<PAGE>


                                        - 8 -


                    Sponsor agrees that, after it has accepted this offer
          and so long as this commitment is in effect, it will not accept
          or solicit any offer or commitment from, or execute any agreement
          with, any other potential source of the financing for the
          Acquisition (other than the Senior Facilities), without Chase's
          prior written consent (which consent shall not be unreasonably
          withheld).  In addition, from the date of the delivery of this
          letter until the earliest of (i) August 5, 1995, (ii) the
          completion of the general syndication of the Senior Facilities
          and (iii) such date as Chase shall inform Sponsor that it will
          not provide any of the Senior Facilities, Sponsor agrees that it
          will not accept or solicit and will not permit any of its
          subsidiaries or affiliates over which it exercises control to
          accept or solicit any financing for Sponsor or any of its
          subsidiaries or affiliates other than (a) usual and customary
          bilateral lines of credit and pre-export financing incurred in
          the ordinary course of business and (b) secured export notes
          (SEN's) in an aggregate amount not to exceed U.S. $500,000,000 so
          long as in the case of the SEN's, Sponsor agrees to consult and
          work with Chase to coordinate such offering so that it will not
          interfere with the syndication of the Senior Facilities.

                    Chase shall have the right to review and approve all
          public announcements and filings made by Sponsor or its
          affiliates relating to the Acquisition or the other transactions
          contemplated hereby that refer to the Senior Facilities or to
          Chase or the other Lenders before they are made (such approval
          not to be unreasonably withheld).


                    Chase's offer set forth in this letter will terminate
          at 5:00 p.m. (New York City time) on February 28, 1995 unless
          Sponsor accepts this letter and the Fee Letter at or prior to
          that time by (a) signing and returning to Chase counterparts of
          this letter and the Fee Letter and (b) paying to Chase the fee
          required by the Fee Letter to be paid on such acceptance. 
          Chase's commitment under this letter, if accepted by Sponsor,
          will in any event terminate at 5:00 p.m. (New York City time) on
          April 5, 1995 if the initial extension of credit under the Senior
          Facilities shall not have occurred prior to such time.


<PAGE>


                                        - 9 -


                    Sponsor consents to the non-exclusive jurisdiction of
          any court of the State of New York or any United States federal
          court sitting in the Borough of Manhattan, New York City, New
          York, United States, and any appellate court from any thereof,
          and waives any immunity from the jurisdiction of such courts over
          any suit, action or proceeding that may be brought in connection
          with this letter agreement, the Term Sheets and the transactions
          contemplated hereby and thereby.  Sponsor irrevocably waives, to
          the fullest extent permitted by law, any objection to any suit,
          action or proceeding that may be brought in connection with this
          letter agreement, the Term Sheets, the Fee Letter and the
          transactions contemplated hereby and thereby in such courts
          whether on grounds of venue, residence or domicile or on the
          ground that any such suit, action or proceeding has been brought
          in an inconvenient forum.  Sponsor agrees that final judgment in
          any such suit, action or proceeding brought in such court shall
          be conclusive and binding upon Sponsor and may be enforced in any
          court to the jurisdiction of which Sponsor is subject by a suit
          upon such judgment.  Notwithstanding the foregoing, any suit,
          action or proceeding brought in connection with this letter
          agreement, the Term Sheets, the Fee Letter or the transactions
          contemplated hereby or thereby, may be instituted in any
          competent court in Argentina.


                    If for the purpose of obtaining judgment in any court
          it is necessary to convert a sum due hereunder to Chase, any
          Lender or any indemnified person in U.S. Dollars into another
          currency the rate of exchange used shall be that at which in
          accordance with normal banking procedures such party could
          purchase U.S. Dollars with such other currency in New York City
          on the business day in New York next preceding the day on which
          final judgment is rendered.  The obligation of Sponsor in respect
          of any sum payable hereunder by it to Chase, any Lender or any
          indemnified person shall, notwithstanding any judgment in a
          currency (the "Judgment Currency") other than U.S. Dollars, be
                         -----------------
          discharged only to the extent that on the business day in New
          York next following receipt by such payee of any sum adjudged to
          be so due in the Judgment Currency such payee may in accordance
          with normal banking procedures purchase and transfer to New York
          U.S. Dollars with the Judgment Currency; if the amount of U.S. 


<PAGE>


                                        - 10 -


          Dollars which could have been so purchased and transferred is
          less than the sum originally due to Chase, any Lender or any
          indemnified person, as the case may be, in U.S. Dollars, Sponsor
          agrees, as a separate obligation and notwithstanding any such
          judgment, to indemnify such payee against the deficiency.


                    To the extent that Sponsor has or hereafter may acquire
          any immunity from jurisdiction of any court or from any legal
          process, Sponsor hereby waives such immunity and agrees not to
          assert, by way of motion, as a defense or otherwise, in any suit,
          action or proceeding the defense of sovereign immunity or any
          claim that it is not personally subject to the jurisdiction of
          the above-named courts by reason of sovereign immunity or
          otherwise, or that it is immune from any legal process (whether
          through service or notice, attachment prior to judgment,
          attachment in aid of execution, execution or otherwise) with
          respect to itself or its property or from attachment either prior
          to judgment or in aid of execution by reason of sovereign
          immunity.


                    This letter and the Fee Letter may be executed in any
          number of counterparts, each of which shall be an original and
          all of which, when taken together, shall constitute one
          agreement, and this letter, the Term Sheet may not be assigned by
          Sponsor without the prior written consent of Chase and may not be
          amended or any provision hereof or thereof waived or modified
          except by an instrument in writing signed by Chase and Sponsor. 
          No person or entity (including, without limitation, Target and
          its affiliates) other than the parties hereto shall have any
          rights under or be entitled to rely upon this letter.  This
          letter, the Fee Letter and the Term Sheets shall be governed by
          and construed in accordance with the law of the State of New
          York.


<PAGE>


                                        - 11 -


                    We look forward to working with Sponsor to complete
          this transaction.

                                        THE CHASE MANHATTAN BANK
                                          (NATIONAL ASSOCIATION)


                                        By____________________________
                                          Title:
          ACCEPTED AND AGREED:

          YPF SOCIEDAD ANONIMA


          By____________________________
            Title:
          Date:_________________________



                                                                Exhibit (c)(1)


                                                                           
          =================================================================


                                 AGREEMENT OF MERGER


                                        Among


                                 YPF Sociedad Anonima


                                YPF Acquisition Corp.


                                         and


                               Maxus Energy Corporation


                                  February 28, 1995


                                                                           
          =================================================================


<PAGE>


                                  TABLE OF CONTENTS
                                  -----------------

                            (Not a part of the Agreement)

                                                                       Page
                                                                       ----


             I.  THE TENDER OFFER . . . . . . . . . . . . . . . . . .    1
                 1.1.  The Offer  . . . . . . . . . . . . . . . . . .    1
                 1.2.  Company Action . . . . . . . . . . . . . . . .    4
                 1.3.  Stockholder Lists  . . . . . . . . . . . . . .    6
                 1.4.  Board of Directors of the Company  . . . . . .    6

            II.  THE MERGER . . . . . . . . . . . . . . . . . . . . .    8
                       2.1.1.  Merger . . . . . . . . . . . . . . . .    8
                       2.1.2.  Effective Time . . . . . . . . . . . .    8
                       2.1.3.  Effect of Merger . . . . . . . . . . .    9
                       2.1.4.  Conversion of Shares of Common Stock .    9
                 2.2.  Stockholders' Meeting of the Company . . . . .   11
                 2.3.  Consummation of the Merger . . . . . . . . . .   11
                 2.4.  Payment for Shares of Common Stock . . . . . .   12
                 2.5.  Closing of the Company's Transfer Books  . . .   14
                 2.6.  The Company Stock Options and Related Matters    14

           III.  REPRESENTATIONS AND WARRANTIES OF PARENT AND PURCHASER 
                                                                        15
                 3.1.  Corporate Organization . . . . . . . . . . . .   15
                 3.2.  Authority  . . . . . . . . . . . . . . . . . .   15
                 3.3.  Offer Documents  . . . . . . . . . . . . . . .   16
                 3.4.  Proxy Statement  . . . . . . . . . . . . . . .   17
                 3.5.  Fees . . . . . . . . . . . . . . . . . . . . .   17
                 3.6.  Consents and Approvals; No Violation . . . . .   17
                 3.7.  Financing  . . . . . . . . . . . . . . . . . .   19
                 3.8.  Operations of the Company Following the Merger   19

            IV.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY  . . .   20
                 4.1.  Corporate Organization . . . . . . . . . . . .   20
                 4.2.  Capitalization . . . . . . . . . . . . . . . .   21
                 4.3.  Authority  . . . . . . . . . . . . . . . . . .   22
                 4.4.  Consents and Approvals; No Violation . . . . .   23
                 4.5.  Commission Filings . . . . . . . . . . . . . .   24
                 4.6.  Absence of Certain Changes . . . . . . . . . .   25
                 4.7.  Litigation . . . . . . . . . . . . . . . . . .   26
                 4.8.  Compliance with Applicable Laws  . . . . . . .   27
                 4.9.  Fees . . . . . . . . . . . . . . . . . . . . .   28
                 4.10. Offer Documents  . . . . . . . . . . . . . . .   28
                 4.11. Schedule 14D-9 . . . . . . . . . . . . . . . .   28
                 4.12. Proxy Statement  . . . . . . . . . . . . . . .   29
                 4.13. Rights . . . . . . . . . . . . . . . . . . . .   29
                 4.14. Certain Actions. . . . . . . . . . . . . . . .   30
                 4.15. Subsidiaries . . . . . . . . . . . . . . . . .   30
                 4.16. No Default . . . . . . . . . . . . . . . . . .   32


                                         (i)


<PAGE>


                                                                       Page
                                                                       ----


                 4.17. Taxes  . . . . . . . . . . . . . . . . . . . .   32
                 4.18. Insurance  . . . . . . . . . . . . . . . . . .   35
                 4.19. Benefit Plans  . . . . . . . . . . . . . . . .   36
                 4.20. Labor Matters  . . . . . . . . . . . . . . . .   38
                 4.21. Certain Environmental Matters  . . . . . . . .   40

             V.  COVENANTS  . . . . . . . . . . . . . . . . . . . . .   40
                 5.1.  Acquisition Proposals  . . . . . . . . . . . .   40
                 5.2.  Interim Operations . . . . . . . . . . . . . .   41
                       5.2.1.  Conduct of Business  . . . . . . . . .   41
                       5.2.2.  Certificate and By-Laws  . . . . . . .   42
                       5.2.3.  Capital Stock  . . . . . . . . . . . .   42
                       5.2.4.  Dividends  . . . . . . . . . . . . . .   43
                       5.2.5.  Debt . . . . . . . . . . . . . . . . .   43
                 5.3.  Employee Plans, Compensation, Etc. . . . . . .   44
                 5.4.  Access and Information . . . . . . . . . . . .   46
                 5.5.  Certain Filings, Consents and Arrangements . .   48
                 5.6.  State Takeover Statutes  . . . . . . . . . . .   48
                 5.7.  Proxy Statement  . . . . . . . . . . . . . . .   48
                 5.8.  Indemnification and Insurance  . . . . . . . .   49
                 5.9.  Additional Agreements  . . . . . . . . . . . .   50
                 5.10. Compliance with Antitrust Laws . . . . . . . .   52
                 5.11. Publicity  . . . . . . . . . . . . . . . . . .   52
                 5.12. Notice of Actions and Proceedings  . . . . . .   53
                 5.13. Notification of Certain Other Matters  . . . .   53
                 5.14. Listing of Preferred Stock . . . . . . . . . .   54
                 5.15. Certain Obligations of Parent  . . . . . . . .   54

            VI.  CONDITIONS . . . . . . . . . . . . . . . . . . . . .   55
                 6.1.  Conditions . . . . . . . . . . . . . . . . . .   55
                       6.1.1.  Stockholder Approval . . . . . . . . .   55
                       6.1.2.  Purchase of Shares of Voting Stock . .   55
                       6.1.3.  Injunctions; Illegality  . . . . . . .   55
                       6.1.4.  HSR Act  . . . . . . . . . . . . . . .   56
                 6.2.  Parent Obligations.  . . . . . . . . . . . . .   56

           VII.  MISCELLANEOUS  . . . . . . . . . . . . . . . . . . .   57
                 7.1.  Termination  . . . . . . . . . . . . . . . . .   57
                 7.2.  Non-Survival of Representations, Warranties
                       and Agreements . . . . . . . . . . . . . . . .   60
                 7.3.  Waiver and Amendment . . . . . . . . . . . . .   60
                 7.4.  Entire Agreement . . . . . . . . . . . . . . .   61
                 7.5.  Applicable Law . . . . . . . . . . . . . . . .   61
                 7.6.  Interpretation . . . . . . . . . . . . . . . .   61
                 7.7.  Notices  . . . . . . . . . . . . . . . . . . .   61
                 7.8.  Counterparts . . . . . . . . . . . . . . . . .   63
                 7.9.  Parties in Interest; Assignment  . . . . . . .   63
                 7.10. Expenses; Termination Fee  . . . . . . . . . .   64
                 7.11. Obligation of Parent . . . . . . . . . . . . .   64
                 7.12. Enforcement of the Agreement . . . . . . . . .   64


                                        (ii)


<PAGE>


                                                                       Page
                                                                       ----


                 7.13. Severability . . . . . . . . . . . . . . . . .   65
                 7.14. Consent to Jurisdiction and Service of Process   65


                                        (iii)


<PAGE>


                                TABLE OF DEFINED TERMS
                                ----------------------

                            (Not a part of the Agreement)

          Term                                                      Section
          ----                                                      -------

          Agreement . . . . . . . . . . . . . . . . . . . . . . .  Preamble
          Balance Sheet . . . . . . . . . . . . . . . . . . . . . . 4.19(b)
          Benefits Agreements . . . . . . . . . . . . . . . . . . .  5.3(c)
          Benefit Plans . . . . . . . . . . . . . . . . . . . . . . .  4.19
          Certificate of Merger . . . . . . . . . . . . . . . . . . . 2.1.2
          Certificate . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
          Closing   . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3
          Code  . . . . . . . . . . . . . . . . . . . . . . . . . . 4.17(a)
          Commission  . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
          Commitment  . . . . . . . . . . . . . . . . . . . . . . . . . 3.7
          Common Stock  . . . . . . . . . . . . . . . . . . . . . . . . 1.1
          Company . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
          Competing Transaction   . . . . . . . . . . . . . . . . . . . 7.1
          Confidentiality Agreement . . . . . . . . . . . . . . . . . . 1.1
          Constituent Corporations  . . . . . . . . . . . . . . . . . 2.1.2
          Continuing Directors  . . . . . . . . . . . . . . . . . . . . 7.1
          Controlled Group  . . . . . . . . . . . . . . . . . . . . 4.19(e)
          CSFB  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
          Current Premium . . . . . . . . . . . . . . . . . . . . . . . 5.8
          D&O Insurance . . . . . . . . . . . . . . . . . . . . . . . . 5.8
          DGCL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
          Director Plan . . . . . . . . . . . . . . . . . . . . . . . . 4.2
          Domestic Taxes  . . . . . . . . . . . . . . . . . . . . . 4.17(a)
          Effective Time  . . . . . . . . . . . . . . . . . . . . . . 2.1.2
          ERISA . . . . . . . . . . . . . . . . . . . . . . . . . . 4.19(a)
          Exchange Act  . . . . . . . . . . . . . . . . . . . . . . . . 1.1
          $4.00 Preferred Stock . . . . . . . . . . . . . . . . . . . . 1.1
          401(k) Plan . . . . . . . . . . . . . . . . . . . . . . . . . 4.2
          Fully Diluted . . . . . . . . . . . . . . . . . . . . . . . . 1.1
          GAAP  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5
          Governmental Entity . . . . . . . . . . . . . . . . . . . . . 3.6
          HSR Act . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6
          Indemnified Party . . . . . . . . . . . . . . . . . . . . . . 5.8
          Merger  . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.1
          Merger Price  . . . . . . . . . . . . . . . . . . . . . . . 2.1.4
          Minimum Share Condition . . . . . . . . . . . . . . . . . . . 1.1
          $9.75 Preferred Stock . . . . . . . . . . . . . . . . . . . 2.1.4
          Offer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1
          Offer Documents . . . . . . . . . . . . . . . . . . . . . . . 3.3
          Option Plans  . . . . . . . . . . . . . . . . . . . . . . . . 2.6
          Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6
          Options and Converts  . . . . . . . . . . . . . . . . . . . . 1.1
          Parent  . . . . . . . . . . . . . . . . . . . . . . . .  Preamble
          Paying Agent  . . . . . . . . . . . . . . . . . . . . . . . . 2.4
          PBGC  . . . . . . . . . . . . . . . . . . . . . . . . . . 4.19(e)
          Person  . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.6
          Preferred Stock . . . . . . . . . . . . . . . . . . . . . . 2.1.4
          Proxy Statement . . . . . . . . . . . . . . . . . . . . . . . 3.4
          Purchaser . . . . . . . . . . . . . . . . . . . . . . .  Preamble


                                         (iv)


<PAGE>


          Term                                                      Section
          ----                                                      -------


          Redemption  . . . . . . . . . . . . . . . . . . . . . . . . . 1.1
          Rights  . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1
          Rights Agreement  . . . . . . . . . . . . . . . . . . . . . . 1.1
          Schedule 14D-1  . . . . . . . . . . . . . . . . . . . . . . . 3.3
          Schedule 14D-9  . . . . . . . . . . . . . . . . . . . . . . . 1.2
          Securities Act  . . . . . . . . . . . . . . . . . . . . . . . 4.5
          SEC Documents . . . . . . . . . . . . . . . . . . . . . . . . 4.5
          Senior Executives . . . . . . . . . . . . . . . . . . . . . . 4.6
          Significant Subsidiary  . . . . . . . . . . . . . . . . . .  4.16
          Stock Certificate . . . . . . . . . . . . . . . . . . . . . . 2.4
          Stock Plans . . . . . . . . . . . . . . . . . . . . . . .  5.3(b)
          Subsidiary  . . . . . . . . . . . . . . . . . . . . . . . . . 7.6
          Surviving Corporation . . . . . . . . . . . . . . . . . . . 2.1.3
          Tax . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.17(b)
          Tax Affiliates  . . . . . . . . . . . . . . . . . . . . . 4.17(a)
          Tax Return  . . . . . . . . . . . . . . . . . . . . . . . 4.17(b)
          Transmittal Letter  . . . . . . . . . . . . . . . . . . . . . 2.4
          $2.50 Preferred Stock . . . . . . . . . . . . . . . . . . . 2.1.4
          Voting Stock  . . . . . . . . . . . . . . . . . . . . . . . . 1.1


                                         (v)


<PAGE>


                                 AGREEMENT OF MERGER
                                 -------------------


               AGREEMENT OF MERGER, dated as of February 28, 1995 (the

          "Agreement"), among YPF Sociedad Anonima, a sociedad anonima

          organized under the laws of the Republic of Argentina ("Parent"),

          YPF Acquisition Corp., a Delaware corporation and a wholly owned

          subsidiary of Parent ("Purchaser"), and Maxus Energy Corporation,

          a Delaware corporation (the "Company").

               Parent, Purchaser and the Company hereby agree as follows:

                                 I.  THE TENDER OFFER
                                     ----------------

               1.1.  The Offer.  Provided that this Agreement has not been
                     ---------

          terminated in accordance with Section 7.1 hereof and none of the

          events set forth in Exhibit A hereto has occurred or exists,

          Purchaser will, and Parent will cause Purchaser to, commence

          (within the meaning of Rule 14d-2(a) of the Securities Exchange

          Act of 1934, as amended (the "Exchange Act")) as promptly as

          practicable after the date hereof, but in any event not later

          than March 7, 1995, a tender offer for all outstanding shares of

          Common Stock, par value $1.00 per share ("Common Stock"), of the

          Company at a price of $5.50 per share, net to the seller in cash. 

          (Such tender offer, as it may be amended from time to time

          pursuant to this Agreement, is referred to herein as the

          "Offer.")  The Offer will be subject only to the conditions set

          forth in Exhibit A, including without limitation the conditions

          that (a) the Board of Directors of the Company, within the time

          provided in the Rights Agreement, dated as of September 8, 1988,

          between the Company and AmeriTrust Company National Association


<PAGE>


          as rights agent (the "Rights Agreement") shall have taken the

          steps necessary to redeem the preferred stock purchase rights

          (the "Rights") issued pursuant to the Rights Agreement so that

          the Rights issued pursuant to the Rights Agreement will not

          become exercisable as a result of the consummation of the

          transactions contemplated in this Agreement (such action, the

          "Redemption") and (b) the number of shares of Common Stock being

          validly tendered and not withdrawn prior to the expiration date

          provided in the Offer which, when added to the shares of Common

          Stock and $4.00 Cumulative Convertible Preferred Stock, par value

          $1.00 per share, of the Company ("$4.00 Preferred Stock" and,

          together with the Common Stock, "Voting Stock") beneficially

          owned by Parent and Purchaser, represent not less than a majority

          of the shares of Voting Stock outstanding on a Fully Diluted (as

          hereinafter defined) basis (the "Minimum Share Condition").  For

          purposes of this Agreement, "Fully Diluted" means the number of

          shares of Voting Stock outstanding as of the close of business on

          February 23, 1995, increased by the number of shares of Voting

          Stock (i) issued between such date and the expiration date of the

          Offer and (ii) issuable pursuant to the exercise of rights (other

          than the Rights) to purchase Voting Stock or upon conversion or

          exchange of other securities, including without limitation the

          rights and securities listed on Schedule 1.1 (collectively, the

          "Options and Converts"), reduced, however, by the number of

          employee stock options and other rights to be cancelled as

          contemplated by Section 2.6.  Any such condition other than the

          Minimum Share Condition may be waived by Purchaser in its sole


                                          2


<PAGE>


          discretion.  Purchaser may, at any time, transfer or assign to

          one or more corporations directly or indirectly wholly owned by

          Parent the right to purchase all or any portion of the shares of

          Common Stock tendered pursuant to the Offer, but any such

          transfer or assignment will not relieve Purchaser of its

          obligations under the Offer or prejudice the rights of tendering

          stockholders to receive payment for shares of Common Stock

          validly tendered and accepted for payment.  Purchaser will accept

          for payment all shares of Common Stock validly tendered pursuant

          to the Offer and not withdrawn as soon as legally permissible,

          and pay for all such shares of Common Stock as promptly as

          practicable thereafter, in each case upon the terms and subject

          to the conditions of the Offer.  Purchaser reserves the right to

          increase the price per share of Common Stock payable in the Offer

          or otherwise to amend the Offer; provided, however, that no such

          amendment may be made that decreases the price per share of

          Common Stock payable pursuant to the Offer, reduces the minimum

          number of shares of Common Stock to be purchased in the Offer,

          imposes additional conditions to the Offer or makes any other

          change in the terms and conditions of the Offer that is

          materially adverse to the holders of shares of Common Stock.  If

          the Agreement is terminated pursuant to Section 7.1 hereof,

          (A) Parent and Purchaser will not, and will cause their

          subsidiaries and affiliates controlled by them not to, acquire or

          offer to acquire or request permission to acquire or offer to

          acquire (either directly or pursuant to a waiver of this or any

          other covenant) shares of Voting Stock otherwise than pursuant to


                                          3


<PAGE>


          the Offer or the Merger (as defined in Section 2.1.1 hereof) for

          a period of not less than 24 months after termination of this

          Agreement without the prior written approval of the Board of

          Directors of the Company and (B) the provisions of the

          confidentiality agreement previously entered into (the

          "Confidentiality Agreement") between the Company and Parent (or

          one of its affiliates) will continue to apply.

               1.2.  Company Action.  The Company consents to the Offer. 
                     --------------

          As soon as practicable on the date of commencement of the Offer,

          the Company will file with the Securities and Exchange Commission

          (the "Commission") and mail to the holders of shares of Common

          Stock a Solicitation/Recommendation Statement on Schedule 14D-9

          pursuant to the Exchange Act (the "Schedule 14D-9").  The

          Schedule 14D-9 will set forth, and the Company hereby represents,

          that the Board of Directors of the Company has at a meeting duly

          called and held and at which a quorum was present and acting

          throughout, by the requisite vote of all directors present,

          (a) determined, based in part on the advice of CS First Boston

          Corporation ("CSFB") described in the sixth sentence of this

          Section 1.2, the Company's financial advisor in connection with

          the Offer and the Merger, that the Offer and the Merger are in

          the best interests of the Company and its stockholders,

          (b) approved the Offer, this Agreement and the Merger, and

          determined that such approval satisfies the requirements of

          Section 203(a)(1) of the General Corporation Law of the State of

          Delaware (the "DGCL") and, as a result, renders inapplicable to

          the Offer, the Merger and this Agreement the other provisions of 


                                          4


<PAGE>


          Section 203(a) of the DGCL, (c) subject to the fiduciary duties

          of the Board of Directors, recommended acceptance of the Offer

          and adoption of this Agreement by the holders of shares of Common

          Stock, (d) taken all such action as may be required by law and

          the Rights Agreement to redeem the Rights, and (e) taken all such

          action as may be required by law and the Company's Restated

          Certificate of Incorporation (the "Certificate") so that Sections

          1 and 2 of Article Ninth of the Certificate are not applicable to

          the transactions contemplated in this Agreement and, as a result,

          the requirements of Sections 1 and 2 of Article Ninth of the

          Certificate will not apply to the Offer, the Merger and the

          transactions with Parent and Purchaser contemplated in this

          Agreement.  The Company will provide Purchaser's counsel a

          reasonable opportunity to review and comment on the Schedule

          14D-9 prior to its being filed with the Commission.  The Company

          will provide Purchaser's counsel a copy of any written comments

          or a summary of telephonic notification of any verbal comments

          the Company or its counsel may receive from the Commission or its

          Staff with respect to the Schedule 14D-9 promptly after receipt

          of such comments and provide Purchaser's counsel with a copy of

          any written responses and a summary of any such verbal responses. 

          The Company further represents and warrants that CSFB has advised

          the Board of Directors of the Company that, in the opinion of

          CSFB as of the date hereof, the consideration to be received by

          the existing holders of shares of Common Stock pursuant to the

          Offer and the Merger is fair to such stockholders from a

          financial point of view.  The Company will, and the Board of 


                                          5


<PAGE>


          Directors of the Company has resolved to, take all actions

          reasonably requested by Purchaser necessary to exempt the Offer

          and the Merger from the provisions of any applicable takeover,

          business combination or control share acquisition law or

          regulation adopted by any State of the United States of America.

               1.3.  Stockholder Lists.  The Company will promptly furnish
                     -----------------

          Purchaser a list of the holders of Common Stock and mailing

          labels containing the names and addresses of all record holders

          relating to Common Stock and lists of securities positions of

          shares of Common Stock held in stock depositories, each as of a

          recent date, and will promptly furnish Purchaser with such

          additional information, including updated lists of stockholders

          of the Company, mailing labels and lists of securities positions,

          and such other assistance as Purchaser or its agents may

          reasonably request in connection with the Offer.  Subject to the

          requirements of law, and except for such steps as are necessary

          to disseminate the Offer Documents (as defined in Section 3.3

          hereof), Parent and Purchaser will hold in confidence the

          information contained in any of such labels and lists and the

          additional information referred to in the preceding sentence,

          will use such information only in connection with the Offer and,

          if this Agreement is terminated, will upon request deliver to the

          Company all such written information and any copies or extracts

          therefrom in its possession or under its control.

               1.4.  Board of Directors of the Company.  Upon Purchaser's
                     ---------------------------------

          acquisition of a majority of the outstanding shares of Voting

          Stock pursuant to the Offer, and from time to time thereafter so 


                                          6


<PAGE>


          long as Parent and/or any of its direct or indirect wholly owned

          subsidiaries (including Purchaser) owns a majority of the

          outstanding shares of Voting Stock, Parent will be entitled,

          subject to compliance with applicable law, the Certificate and

          the provisions of the next sentence, to designate at its option

          up to that number of directors, rounded up to the nearest whole

          number, of the Company's Board of Directors as will make the

          percentage of the Company's directors designated by Parent equal

          to the percentage of outstanding shares of Voting Stock held by

          Parent and any of its direct or indirect wholly owned

          subsidiaries (including Purchaser), including shares of Common

          Stock accepted for payment pursuant to the Offer.  The Company

          will, upon the request of Parent, promptly increase the size of

          its Board of Directors and/or use its reasonable best efforts to

          secure the resignation of such number of directors as is

          necessary to enable Parent's designees to be elected to the

          Company's Board of Directors and will use its reasonable best

          efforts to cause Parent's designees to be so elected, subject in

          all cases to Section 14(f) of the Exchange Act, it being

          understood that the Company will have no obligation to comply

          with Section 14(f) of the Exchange Act until after the Offer is

          completed in accordance with the terms hereof and that the

          Company agrees to comply with such Section of the Exchange Act as

          promptly as practicable thereafter, provided that, prior to the

          Effective Time (as defined in Section 2.1.2 hereof), the Company

          will use its reasonable best efforts to assure that the Company's

          Board of Directors always has (at its election) at least three 


                                          7


<PAGE>


          members who are directors of the Company as of the date hereof. 

          At such times, the Company will use its reasonable best efforts,

          subject to any limitations imposed by applicable laws or rules of

          the New York Stock Exchange, to cause persons designated by

          Parent to constitute the same percentage as such persons

          represent on the Company's Board of Directors of (a) each

          committee of the Board of Directors of the Company, (b) each

          board of directors or board of management of each subsidiary of

          the Company, and (c) each committee of each such board.

                                   II.  THE MERGER
                                        ----------

                    2.1.1.  Merger.  Subject to the terms and conditions
                            ------

          hereof, (a) Purchaser will be merged with and into the Company

          and the separate corporate existence of Purchaser will thereupon

          cease (the "Merger") in accordance with the applicable provisions

          of the DGCL and (b) each of the Company and Parent will use its

          reasonable best efforts to cause the Merger to be consummated as

          soon as practicable following the expiration of the Offer.

                    2.1.2.  Effective Time.  As soon as practicable
                            --------------

          following fulfillment or waiver of the conditions specified in

          Article VI hereof, and provided that this Agreement has not been

          terminated or abandoned pursuant to Section 7.1 hereof, the

          Company and Purchaser (the "Constituent Corporations") will cause

          a Certificate of Merger (the "Certificate of Merger") to be filed

          with the Secretary of State of the State of Delaware as provided

          in Section 251 of the DGCL.  The Merger will become effective on

          the date on which the Certificate of Merger has been filed with 


                                          8


<PAGE>


          the Secretary of State of the State of Delaware (the "Effective

          Time").

                    2.1.3.  Effect of Merger.  The Company will be the
                            ----------------

          surviving corporation in the Merger (sometimes hereinafter

          referred to as the "Surviving Corporation") and will continue to

          be governed by the laws of the State of Delaware, and the

          separate corporate existence of the Company and all of its

          rights, privileges, powers and franchises of a public as well as

          of a private nature, and being subject to all of the

          restrictions, disabilities and duties as a corporation organized

          under the DGCL, will continue unaffected by the Merger.  The

          Merger will have the effects specified in the DGCL.  The

          Certificate and the By-Laws of the Company in effect at the

          Effective Time will be the Certificate of Incorporation and

          By-Laws of the Surviving Corporation until duly amended in

          accordance with their terms and the DGCL.  The directors of

          Purchaser immediately prior to the Effective Time will be the

          directors of the Surviving Corporation, and the officers of the

          Company immediately prior to the Effective Time will be the

          officers of the Surviving Corporation, from and after the

          Effective Time, until their successors have been duly elected or

          appointed and qualified or until their earlier death, resignation

          or removal in accordance with the terms of Surviving

          Corporation's Certificate of Incorporation and By-Laws and the

          DGCL.

                    2.1.4.  Conversion of Shares of Common Stock.  At the
                            ------------------------------------

          Effective Time, (a) each then-outstanding share of Common Stock 


                                          9


<PAGE>


          not owned by Parent, Purchaser or any other direct or indirect

          subsidiary of Parent (other than those shares of Common Stock

          held in the treasury of the Company and shares of Common Stock

          held by stockholders who perfect their appraisal rights under the

          DGCL) will be cancelled and retired and be converted into a right

          to receive in cash an amount per share of Common Stock equal to

          the highest price per share paid for a share of such stock by

          Purchaser pursuant to the Offer (the "Merger Price"), without

          interest thereon, (b) each then-outstanding share of Common Stock

          owned by Parent, Purchaser or any other direct or indirect

          subsidiary of Parent will be cancelled and retired, and no

          payment will be made with respect thereto, (c) each share of

          Common Stock issued and held in the Company's treasury will be

          cancelled and retired, and no payment will be made with respect

          thereto, (d) each outstanding share of common stock of Purchaser

          will, by virtue of the Merger and without any action on the part

          of the holder thereof, be converted into and become one share of

          common stock of the Surviving Corporation, and (e) each

          outstanding share of $4.00 Preferred Stock, $9.75 Cumulative

          Convertible Preferred Stock, par value $1.00 per share ("$9.75

          Preferred Stock"), and $2.50 Cumulative Preferred Stock, par

          value $1.00 per share ("$2.50 Preferred Stock"), of the Company

          (collectively, the "Preferred Stock") will remain outstanding and

          have, as to the Surviving Corporation, the identical powers,

          preferences, rights, qualifications, limitations and restrictions

          as such shares of Preferred Stock presently have, except as

          agreed to by the holder of $9.75 Preferred Stock.


                                          10


<PAGE>


               2.2.  Stockholders' Meeting of the Company.  The Company
                     ------------------------------------

          will take all action necessary in accordance with applicable law

          and the Certificate and its By-Laws to convene a meeting of its

          stockholders as promptly as reasonably practicable following the

          date hereof to consider and vote upon the adoption of this

          Agreement, if such stockholder approval is required by applicable

          law; provided, however, that nothing herein will affect the right

          of Purchaser to take action by written consent in lieu of a

          meeting or otherwise to the extent permitted by applicable law. 

          At any such meeting, all shares of Voting Stock then owned by

          Parent, Purchaser or any other direct or indirect subsidiary of

          Parent will be voted in favor of adoption of this Agreement. 

          Subject to its fiduciary duties under applicable law, the Board

          of Directors of the Company will recommend that the Company's

          stockholders approve adoption of this Agreement if such

          stockholder approval is required.

               2.3.  Consummation of the Merger.  The closing of the Merger
                     --------------------------

          (the "Closing") will take place (a) at the principal executive

          offices of the Company as promptly as practicable after the later

          of (i) the business day of (and immediately following) the

          receipt of approval of adoption of this Agreement by the

          Company's stockholders if such approval is required, or as soon

          as practicable after completion of the Offer if such approval by

          stockholders is not required, and (ii) the day on which the last

          of the conditions set forth in Article VI hereof is satisfied or

          duly waived or (b) at such other time and place and on such other

          date as Purchaser and the Company may agree.


                                          11


<PAGE>


               2.4.  Payment for Shares of Common Stock.  Purchaser will
                     ----------------------------------

          authorize the depositary for the Offer (or one or more commercial

          banks organized under the laws of the United States or any state

          thereof with capital, surplus and undivided profits of at least

          $100,000,000) to act as Paying Agent hereunder with respect to

          the Merger (the "Paying Agent").  Each holder (other than Parent,

          Purchaser or any subsidiary of Parent) of a certificate or

          certificates which prior to the Effective Time represented shares

          of Common Stock will be entitled to receive, upon surrender to

          the Paying Agent of such certificate or certificates for

          cancellation and subject to any required withholding of taxes,

          the aggregate amount of cash into which the shares of Common

          Stock previously represented by such certificate or certificates

          shall have been converted in the Merger.  On or before the

          Effective Time, Purchaser will make available to the Paying Agent

          sufficient funds to make all payments pursuant to the preceding

          sentence.  Pending payment of such funds to the holders of shares

          of Common Stock, such funds shall be held and invested by the

          Paying Agent as Parent directs.  Any net profit resulting from,

          or interest or income produced by, such investments will be

          payable to the Surviving Corporation or Parent, as Parent

          directs.  Parent will promptly replace any monies lost through

          any investment made pursuant to this Section 2.4.  Until

          surrendered to the Paying Agent, each certificate which

          immediately prior to the Effective Time represented outstanding

          shares of Common Stock (other than shares of Common Stock owned

          by Parent, Purchaser or any other direct or indirect subsidiary 


                                          12


<PAGE>


          of Parent and shares of Common Stock held by stockholders who

          perfect their appraisal rights under the DGCL) (a "Stock

          Certificate") will be deemed for all corporate purposes to

          evidence only the right to receive upon such surrender the

          aggregate amount of cash into which the shares of Common Stock

          represented thereby will have been converted, subject to any

          required withholding of taxes.  No interest will be paid on the

          cash payable upon the surrender of the Stock Certificate or Stock

          Certificates.  Any cash delivered or made available to the Paying

          Agent pursuant to this Section 2.4 and not exchanged for Stock

          Certificates within three months after the Effective Time will be

          returned by the Paying Agent to the Surviving Corporation which

          thereafter will act as Paying Agent, subject to the rights of

          holders of unsurrendered Stock Certificates under this Article

          II, and any former stockholders of the Company who have not

          theretofore complied with the instructions for exchanging their

          Stock Certificates will thereafter look only to the Surviving

          Corporation for payment of their claim for the consideration set

          forth in Section 2.1, without any interest thereon, but will have

          no greater rights against the Surviving Corporation (or either

          Constituent Corporation) than may be accorded to general

          creditors thereof under applicable law.  Notwithstanding the

          foregoing, neither the Paying Agent nor any party hereto will be

          liable to a holder of shares of Common Stock for any cash or

          interest thereon delivered to a public official pursuant to

          applicable abandoned property laws.  Promptly after the Effective

          Time, the Paying Agent will mail to each record holder of Stock 


                                          13


<PAGE>


          Certificates a form of letter of transmittal (the "Transmittal

          Letter") and instructions for use thereof in surrendering such

          Stock Certificates which will specify that delivery will be

          effected and risk of loss and title to the Stock Certificates

          will pass to the Paying Agent only upon proper delivery of the

          Stock Certificates to the Paying Agent in accordance with the

          terms of delivery specified in the Transmittal Letter and

          instructions for use thereof in surrendering such Stock

          Certificates and receiving the applicable Merger Price for each

          share of Common Stock previously represented by such Stock

          Certificates.  From and after the Effective Time, holders of

          Stock Certificates immediately prior to the Merger will have no

          right to vote or to receive any dividends or other distributions

          with respect to any shares of Common Stock which were theretofore

          represented by such Stock Certificates, other than any dividends

          or other distributions payable to holders of record as of a date

          prior to the Effective Time, and will have no other rights other

          than as provided herein or by law.  

               2.5.  Closing of the Company's Transfer Books.  At the
                     ---------------------------------------

          Effective Time, the stock transfer books of the Company will be

          closed with respect to Common Stock and no transfer of shares of

          Common Stock will thereafter be made.  If, after the Effective

          Time, Stock Certificates are presented to the Surviving

          Corporation, they will be cancelled, retired and exchanged for

          cash as provided in Section 2.4 hereof.

               2.6.  The Company Stock Options and Related Matters.  The
                     ---------------------------------------------

          Company will cooperate with Parent and Purchaser in an effort to 


                                          14


<PAGE>


          obtain the surrender of all options to purchase shares of Common

          Stock and other rights (collectively, "Options") granted pursuant

          to the 1992 Director Stock Option Plan, the 1992 Long-Term

          Incentive Plan, the 1986 Long-Term Incentive Plan, the 1980

          Long-Term Incentive Plan or any other plans in effect as of the

          date hereof (collectively, the "Option Plans") in accordance with

          the provisions of Schedule 2.6.  Effective immediately prior to

          the Effective Time, the restrictions on all shares of restricted

          Common Stock identified in Schedule 2.6 will lapse without

          further action.

             III.  REPRESENTATIONS AND WARRANTIES OF PARENT AND PURCHASER
                   ------------------------------------------------------

               Parent and Purchaser hereby jointly and severally represent

          and warrant to the Company that:

               3.1.  Corporate Organization.  Each of Parent and Purchaser
                     ----------------------

          is a corporation duly organized, validly existing and in good

          standing under the laws of its state or other jurisdiction of

          incorporation and has all requisite corporate power and authority

          to own, lease and operate its properties and assets and to carry

          on its business as it is now being conducted, except where the

          failure to have such power or authority would not individually or

          in the aggregate have a material adverse effect on the financial

          condition, properties, business or results of operations of

          Parent and Purchaser, taken as a whole.  Parent beneficially owns

          all of the outstanding capital stock of Purchaser.

               3.2.  Authority.  Each of Parent and Purchaser has the
                     ---------

          requisite corporate power and authority to execute and deliver

          this Agreement and to consummate the transactions contemplated 


                                          15


<PAGE>


          hereby.  The execution and delivery of this Agreement and the

          consummation of the transactions contemplated hereby have been

          duly approved by the respective Boards of Directors of Parent and

          Purchaser and by Parent as the sole stockholder of Purchaser, and

          no other corporate proceedings on the part of Parent or Purchaser

          are necessary to consummate the transactions so contemplated. 

          This Agreement has been duly executed and delivered by each of

          Parent and Purchaser and constitutes a valid and binding

          obligation of each of Parent and Purchaser, enforceable against

          Parent and Purchaser in accordance with its terms.

               3.3.  Offer Documents.  The documents (the "Offer
                     ---------------

          Documents") pursuant to which the Offer will be made, including

          the Schedule 14D-1 filed by Purchaser pursuant to the Exchange

          Act (the "Schedule 14D-1"), will comply as to form in all

          material respects with the provisions of the Exchange Act and the

          rules and regulations thereunder.  The information contained in

          the Offer Documents (other than information supplied in writing

          by the Company expressly for inclusion in the Offer Documents)

          will not, at the respective times the Schedule 14D-1 or any

          amendments or supplements thereto are filed with the Commission,

          contain any untrue statement of a material fact or omit to state

          any material fact required to be stated therein or necessary in

          order to make the statements made therein, in light of the

          circumstances under which they were made, not misleading. 

          Purchaser will promptly correct any statements in the Schedule

          14D-1 and the Offer Documents that have become false or

          misleading and take all steps necessary to cause such Schedule 


                                          16


<PAGE>


          14D-1 as so corrected to be filed with the Commission and such

          Offer Documents as so corrected to be disseminated to holders of

          shares of Common Stock, in each case as and to the extent

          required by applicable law.

               3.4.  Proxy Statement.  None of the information to be
                     ---------------

          supplied by Parent or Purchaser in writing expressly for

          inclusion in a proxy or information statement of the Company

          required to be mailed to the Company's stockholders in connection

          with the adoption of this Agreement (the "Proxy Statement"), or

          in any amendments or supplements thereto will, at the time of (a)

          the first mailing thereof and (b) the meeting, if any, of

          stockholders to be held in connection with the adoption of this

          Agreement, contain any untrue statement of a material fact or

          omit to state any material fact required to be stated therein or

          necessary in order to make the statements therein, in light of

          the circumstances under which they were made, not misleading.

               3.5.  Fees.  In no event, including without limitation
                     ----

          termination of this Agreement and abandonment of the Merger

          pursuant to Section 7.1 hereof, will the Company or any of its

          subsidiaries, prior to the Merger, be obligated to pay any fee or

          commission to any financial advisor, broker, finder or

          intermediary in connection with the transactions contemplated

          hereby pursuant to or as a consequence of any agreement or

          commitment of Parent, Purchaser or any of their respective

          affiliates.

               3.6.  Consents and Approvals; No Violation.  Except as set
                     ------------------------------------

          forth in Schedule 3.6, neither the execution and delivery of this


                                          17


<PAGE>


          Agreement by Parent and Purchaser nor the consummation by Parent

          and Purchaser of the transactions contemplated hereby will (a)

          conflict with or result in any breach of any provision of their

          respective certificates of incorporation or by-laws (or

          comparable governing instruments), (b) violate, conflict with,

          constitute a default (or an event which, with notice or lapse of

          time or both, would constitute a default) under, or result in the

          termination of, or accelerate the performance required by, or

          result in the creation of any lien or other encumbrance upon any

          of the properties or assets of Parent or any of its subsidiaries

          under, any of the terms, conditions or provisions of any note,

          bond, mortgage, indenture, deed of trust, license, lease

          agreement or other instrument or obligation to which Parent or

          any such subsidiary is a party or to which they or any of their

          respective properties or assets are subject, except for such

          violations, conflicts, breaches, defaults, terminations,

          accelerations or creations of liens or other encumbrances, which,

          individually or in the aggregate, will not have a material

          adverse effect on the business, financial condition or results of

          operations of Parent and its subsidiaries, taken as a whole, or

          (c) require any consent, approval, authorization or permit of or

          from, or filing with or notification to, any court, governmental

          authority or other regulatory or administrative agency or

          commission, domestic or foreign ("Governmental Entity"), except

          (i) pursuant to the Exchange Act, (ii) filing certificates of

          merger pursuant to the DGCL and the laws of any other state,

          (iii) filings required under the securities or blue sky laws of 


                                          18


<PAGE>


          the various states, (iv) filings under the Hart-Scott-Rodino

          Antitrust Improvements Act of 1976, as amended (the "HSR Act"),

          (v) consents, approvals, authorizations, permits, filings or

          notifications under laws and regulations of various foreign

          jurisdictions, other than Argentina and its provinces, or

          (vi) consents, approvals, authorizations, permits, filings or

          notifications which if not obtained or made will not,

          individually or in the aggregate, have a material adverse effect

          on the business, financial condition or results of operations of

          Parent and its subsidiaries, taken as a whole.

               3.7.  Financing.  Prior to the execution of this Agreement
                     ---------

          by the parties hereto, Parent executed a commitment letter with

          Chase Manhattan Bank, N.A. (the "Commitment"), a copy of which

          has been previously furnished to the Company, providing for up to

          $800 million of acquisition financing.  As of the date hereof,

          the executive officers of Parent have no reason to believe that

          any condition to the financing contemplated by the Commitment

          will not be satisfied in accordance with the terms of the

          Commitment.  Parent and Purchaser hereby covenant that they will

          use their respective reasonable best efforts to obtain the

          financing contemplated by the Commitment.

               3.8. Operations of the Company Following the Merger.  Based
                    ----------------------------------------------

          upon, among other things, Parent's review of the Company's

          financial condition and operations, the Company's business plan

          and the representations made by the Company in this Agreement,

          the financial condition of Parent and its subsidiaries and

          Parent's and Purchaser's present plans with respect to the 


                                          19


<PAGE>


          Company and its subsidiaries following the Merger, Parent has no

          reason to believe that, following the consummation of the Merger

          and the completion of the financings contemplated by the

          Commitment, the Company will not be able to meet its obligations

          as they come due, including solely for purposes of this

          representation preferred stock dividend and mandatory redemption

          payments.

                  IV.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY
                       ---------------------------------------------

               The Company hereby represents and warrants to each of Parent

          and Purchaser that:

               4.1.  Corporate Organization.  The Company is a corporation
                     ----------------------

          duly organized, validly existing and in good standing under the

          laws of its state of incorporation and is in good standing as a

          foreign corporation in each jurisdiction where failure to so

          qualify or be in good standing is reasonably likely to have a

          material adverse effect on the financial condition, properties,

          business or results of operation of the Company and its

          subsidiaries, taken as a whole.  The Company has the requisite

          corporate power to own, lease and operate its properties and

          assets and to carry on its businesses as they are now being

          conducted.  The Company has furnished Parent true and correct

          copies of the certificate of incorporation and by-laws (or other

          governing instruments), as amended to the date hereof, of the

          Company and each of its subsidiaries (except the inactive

          subsidiaries identified as such on Schedule 4.1).  The Company's

          and each subsidiary's certificate of incorporation and by-laws 


                                          20


<PAGE>


          (or other governing instruments) as so delivered are in full

          force and effect.

               4.2.  Capitalization.  As of the date hereof, the authorized
                     --------------

          capital stock of the Company consists of (i) 300,000,000 shares

          of Common Stock and (ii) 100,000,000 shares of Preferred Stock. 

          As of the close of business on February 23, 1995, (a) 135,497,705

          shares of Common Stock were validly issued and outstanding, fully

          paid and nonassessable and not subject to preemptive rights,

          (b) 4,358,658 shares of $4.00 Preferred Stock were validly issued

          and outstanding, fully paid and nonassessable, (c) 1,250,000

          shares of $9.75 Preferred Stock were validly issued and

          outstanding, fully paid and nonassessable, and (d) 3,500,000

          shares of $2.50 Preferred Stock were validly issued and

          outstanding, fully paid and nonassessable.  Since such date, the

          Company has not issued any additional shares of capital stock

          other than pursuant to (i) the exercise or conversion of Options

          and Converts, (ii) the Company's Employee Shareholding and

          Investment Plan (the "401(k) Plan"), or (iii) the Company's

          Director Stock Compensation Plan (the "Director Plan").  Except

          for the Options and Converts, the Rights, shares issued pursuant

          to the Director Plan and as otherwise set forth in this

          Section 4.2, there are not now, and at the Effective Time there

          will not be, any shares of capital stock of the Company

          authorized, issued or outstanding and there are not now, and at

          the Effective Time there will not be, any outstanding

          subscriptions, options, warrants, rights, convertible securities

          or any other agreements or commitments of any character relating 


                                          21


<PAGE>


          to the issued or unissued capital stock or other securities of

          the Company obligating the Company to issue, deliver or sell, or

          cause to be issued, delivered or sold, additional shares of

          capital stock of the Company or obligating the Company to grant,

          extend or enter into any subscription, option, warrant, right,

          convertible security or other similar agreement or commitment. 

          Except as set forth in this Section 4.2, on Schedule 4.2 or

          otherwise in this Agreement, and except for provisions in

          employee plans relating to the pass-through of voting rights,

          there are not now, and at the Effective Time there will not be,

          any voting trusts or other agreements or understandings to which

          the Company or any subsidiary of the Company is a party or is

          bound with respect to the voting of the capital stock of the

          Company.

               4.3.  Authority.  The Company has the requisite corporate
                     ---------

          power and authority to enter into this Agreement and, except for

          any required adoption of this Agreement by the holders of the

          Voting Stock, to consummate the transactions contemplated hereby. 

          The execution and delivery of this Agreement and the consummation

          of the transactions contemplated hereby have been duly and

          validly approved by the Board of Directors of the Company and no

          other corporate proceedings on the part of the Company are

          necessary to enter into this Agreement or to consummate the

          transactions so contemplated, subject only, to the extent

          required with respect to the consummation of the Merger, to

          adoption of this Agreement, if necessary, by the holders of

          Voting Stock.  This Agreement has been duly executed and 


                                          22


<PAGE>


          delivered by, and constitutes a valid and binding obligation of,

          the Company, enforceable against the Company in accordance with

          its terms.

               4.4.  Consents and Approvals; No Violation.  Neither the
                     ------------------------------------

          execution and delivery of this Agreement by the Company nor the

          consummation by the Company of the transactions contemplated

          hereby will (a) conflict with or result in any breach or

          violation of any provision of, or constitute a default (or an

          event which, with notice or lapse of time or both, would

          constitute a default) under, or result in the termination of, or

          accelerate the performance required by, or result in the creation

          of any lien or other encumbrance upon any of the properties or

          assets of the Company or any of its subsidiaries under, any of

          the terms, conditions or provisions of (i) their respective

          certificates of incorporation or by-laws or (ii) any note, bond,

          mortgage, indenture, deed of trust, license, lease, agreement or

          other instrument or obligation to which the Company or any such

          subsidiary is a party or to which they or any of their respective

          properties or assets are subject, except for such violations,

          conflicts, breaches, defaults, terminations, accelerations or

          creations of liens or other encumbrances which are set forth on

          Schedule 4.4 or which, individually or in the aggregate, will not

          have a material adverse effect on the business, financial

          condition or results of operations of the Company and its

          subsidiaries, taken as a whole, or (b) require any consent,

          approval, authorization or permit of, or filing with or

          notification to, any Governmental Entity, except (i) pursuant to 


                                          23


<PAGE>


          the Exchange Act, (ii) filing certificates of merger pursuant to

          the DGCL and the laws of any other state, (iii) filings required

          under the securities or blue sky laws of the various states, (iv)

          filings under the HSR Act, (v) consents, approvals,

          authorizations, permits, filings or notifications under laws and

          regulations of various foreign jurisdictions listed or described

          on Schedule 4.4, and (vi) consents, approvals, authorizations,

          permits, filings or notifications which if not obtained or made

          will not, individually or in the aggregate, have a material

          adverse effect on the business, financial condition or results of

          operations of the Company and its subsidiaries, taken as a whole.

               4.5.  Commission Filings.  The Company has heretofore filed
                     ------------------

          all statements, forms, reports and other documents with the

          Commission required to be filed pursuant to the Securities Act of

          1933, as amended (the "Securities Act"), and the Exchange Act

          since January 1, 1993, and has made available to Parent copies of

          all such statements, forms, reports and other documents,

          including without limitation each registration statement, Current

          Report on Form 8-K, proxy or information statement, Annual Report

          on Form 10-K and Quarterly Report on Form 10-Q filed during such

          period (in the case of each such report, including all exhibits

          thereto) (the "SEC Documents").  The SEC Documents, as of their

          respective filing dates, complied as to form in all material

          respects with all applicable requirements of the Securities Act

          and the Exchange Act and did not (as of their respective filing

          dates) contain any untrue statement of a material fact or omit to

          state a material fact required to be stated therein or necessary 


                                          24


<PAGE>


          in order to make the statements made therein, in light of the

          circumstances under which they were made, not misleading.  The

          audited and unaudited consolidated financial statements, together

          with the notes thereto, of the Company included (or incorporated

          by reference) in the SEC Documents present fairly, in all

          material respects, the financial position of the Company and its

          consolidated subsidiaries as of the dates thereof and the results

          of their operations and changes in financial position for the

          periods then ended in accordance with generally accepted

          accounting principles ("GAAP") applied on a consistent basis

          (except as stated in such financial statements), subject, in the

          case of the unaudited financial statements, to normal year-end

          audit adjustments.

               4.6.  Absence of Certain Changes.  Except as disclosed in
                     --------------------------

          the SEC Documents, as disclosed to Parent by the Company in a

          writing which makes express reference to this Section 4.6 or as

          set forth on Schedule 4.6, since December 31, 1994, the Company

          and its subsidiaries have conducted their respective businesses

          only in the ordinary course, and there has not been (a) any event

          or change having or that is reasonably expected to have a

          material adverse effect on the business, financial condition or

          results of operations of the Company and its subsidiaries, taken

          as a whole, (b) in the case of the Company, any declaration,

          setting aside or payment of any dividend or other distribution

          with respect to its capital stock, other than the regular cash

          dividends on shares of $4.00 Preferred Stock, $9.75 Preferred

          Stock and $2.50 Preferred Stock, or relating to the redemption of


                                          25


<PAGE>


          the Rights as herein contemplated, (c) in the case of the

          Company, any change by the Company in accounting principles used

          for purposes of financial reporting, (d) any entry into any

          agreement or understanding, whether written or (if enforceable)

          oral, between the Company or any of its subsidiaries on the one

          hand, and any of their respective employees at Pay Grade 12 or

          above ("Senior Executives"), on the other hand, providing for the

          employment of any such Senior Executive or any severance or

          termination benefits payable or to become payable by the Company

          or any subsidiary to any Senior Executive, or (e) except as

          permitted by this Agreement, any increase (including any increase

          effective in the future) in (i) the compensation, severance or

          termination benefits payable or to become payable by the Company

          or any subsidiary to any Senior Executive (or any increase in

          benefits under any change in control severance arrangement

          applicable to employees of the Company and its subsidiaries,

          generally) or (ii) any bonus, insurance, pension or other

          employee benefits (including without limitation the granting of

          stock options, stock appreciation rights or restricted stock

          awards) made to, for or with any Senior Executive, except for

          normal increases associated with regular annual performance

          evaluations in the ordinary course of business or normal accruals

          of benefits under the terms of any such plan or arrangement.

               4.7.  Litigation.  Except as disclosed in SEC Documents
                     ----------

          filed prior to the date of this Agreement or on Schedule 4.7,

          there is no suit, action, investigation or proceeding pending,

          or, to the knowledge of the executive officers of the Company, 


                                          26


<PAGE>


          threatened against or affecting the Company or any subsidiary of

          the Company which is reasonably expected to have a material

          adverse effect on the Company and its subsidiaries taken as a

          whole, nor is there any judgment, decree, injunction, rule or

          order of any Governmental Entity or arbitrator outstanding

          against the Company having, or which, insofar as reasonably can

          be foreseen, in the future would have, any such effect.

               4.8.  Compliance with Applicable Laws.  The Company and each
                     -------------------------------

          of its subsidiaries hold, and at all relevant times have held,

          all material licenses, franchises, permits and authorizations

          necessary for the lawful conduct of its business substantially as

          it is currently conducted.  Except as required to be disclosed in

          the SEC Documents filed prior to the date of this Agreement or as

          to matters for which reserves have been established and which

          reserves have been disclosed to Purchaser, to the knowledge of

          the executive officers of the Company, the businesses of the

          Company and its subsidiaries are not presently being conducted,

          and to the knowledge of the executive officers of the Company,

          have not previously been conducted, in violation of any law,

          ordinance or regulation of any Governmental Entity, except for

          possible violations which individually or in the aggregate do

          not, and, insofar as reasonably can be foreseen, in the future

          will not, have a material adverse effect on the Company and its

          subsidiaries taken as a whole.  Except as described in SEC

          Documents filed prior to the date of this Agreement, no

          investigation or review by any Governmental Entity concerning any

          such possible violations by the Company or any of its 


                                          27


<PAGE>


          subsidiaries is pending or, to the knowledge of the executive

          officers of the Company, threatened, nor has any Governmental

          Entity indicated an intention to conduct the same in each case

          other than those the outcome of which will not have a material

          adverse effect on the Company and its subsidiaries taken as a

          whole.

               4.9.  Fees.  Except as will be set forth in the Schedule
                     ----

          14D-9, neither the Company nor any of its subsidiaries has paid

          or become obligated to pay any fee or commission to any financial

          advisor, broker, finder or intermediary in connection with the

          transactions contemplated hereby.  The Company has previously

          furnished Parent a copy of its engagement letter with CSFB.

               4.10.  Offer Documents.  None of the information supplied by
                      ---------------

          the Company or its subsidiaries in writing expressly for

          inclusion in the Offer Documents or in any amendments thereto or

          supplements thereto will, at the time supplied or upon the

          expiration of the Offer, contain any untrue statement of a

          material fact or omit to state any material fact required to be

          stated therein or necessary in order to make the statements

          therein, in light of the circumstances under which they were

          made, not misleading.

               4.11.  Schedule 14D-9.  The Schedule 14D-9 will comply as to
                      --------------

          form in all material respects with the applicable requirements of

          the Exchange Act and the rules and regulations thereunder and

          will not, at the respective times the Schedule 14D-9 or any

          amendments thereto or supplements thereto are filed with the

          Commission, contain any untrue statement of a material fact or 


                                          28


<PAGE>


          omit to state any material fact required to be stated therein or

          necessary in order to make the statements therein, in light of

          the circumstances under which they were made, not misleading. 

          The Company will promptly correct any statements in the Schedule

          14D-9 that have become materially false or misleading and take

          all steps necessary to cause such Schedule 14D-9 as so corrected

          to be filed with the Commission and to be disseminated to holders

          of shares of Voting Stock, in each case as and to the extent

          required by applicable law.

               4.12.  Proxy Statement.  The Proxy Statement and all
                      ---------------

          amendments and supplements thereto will comply as to form in all

          material respects with the applicable requirements of the

          Exchange Act and the rules and regulations thereunder and will

          not, at the time of (a) the first mailing thereof and (b) the

          meeting, if any, of stockholders to be held in connection with

          the Merger, together with any amendments and supplements thereto,

          contain any untrue statement of a material fact or omit to state

          any material fact required to be stated therein or necessary in

          order to make the statements therein, in light of the

          circumstances under which they were made, not misleading, except

          that no representation is made by the Company with respect to

          information supplied in writing by Parent or any affiliate of

          Parent expressly for inclusion in the Proxy Statement.

               4.13.  Rights.  The Company has, or prior to the
                      ------

          commencement of the Offer shall have, taken the necessary steps

          to redeem prior to the close of business on the 20th calendar day

          after commencement of the Offer all of the outstanding Rights 


                                          29


<PAGE>


          issued pursuant to the Rights Agreement in accordance with the

          terms of the Rights Agreement and applicable law.

               4.14.  Certain Actions.  The actions referred to in Section
                      ---------------

          1.2 have been duly taken by the Board of Directors of the Company

          prior to the date hereof.

               4.15.  Subsidiaries.  (a) Each subsidiary of the Company is
                      ------------

          a corporation or other legal entity duly incorporated or

          organized, validly existing and in good standing under the laws

          of its jurisdiction of incorporation or organization, has all

          requisite corporate or similar power and authority to own its

          properties and assets and to carry on its business as now

          conducted except where the failure to have such power and

          authority would not have a material adverse effect on the

          financial condition, properties, business or results of

          operations of the Company and its subsidiaries taken as a whole. 

          Each subsidiary of the Company is duly qualified to do business

          as a foreign corporation or other legal entity and is in good

          standing in each jurisdiction where the character of the property

          owned or leased by it or the nature of its activities make such

          qualification necessary, except for those jurisdictions where

          failure to be so qualified or in good standing would not,

          individually or in the aggregate, have a material adverse effect

          on the financial condition, properties, business or results of

          operations of the Company and its subsidiaries taken as a whole. 

          Schedule 4.15(a) sets forth the name, jurisdiction of

          incorporation or organization, capitalization and equity holders

          of each subsidiary of the Company.  Except as disclosed in 


                                          30


<PAGE>


          Schedule 4.15(a) and except for insignificant equity or other

          interests received in the ordinary course of business of the

          Company, the Company does not own, directly or indirectly, or

          have voting rights with respect to, any capital stock or other

          equity securities of any corporation or have any direct or

          indirect equity or ownership interest in any business.

                    (b)  Except as disclosed on Schedule 4.15(a) or

          4.15(b), or as may be disclosed on the certificates representing

          the capital stock of the subsidiaries of the Company or provided

          pursuant to the terms of partnership agreements, joint venture

          agreements or other constituent documentation, copies of which

          have been provided or made available to representatives of

          Parent, and except as may be required under the securities laws

          of any jurisdiction, (i) all of the outstanding capital stock of,

          or other ownership interests in, each subsidiary of the Company,

          has been validly issued, is (in the case of capital stock) fully

          paid and nonassessable and (in the case of partnership interests)

          not subject to current or future capital calls, and is owned by

          the Company, directly or indirectly, free and clear of any lien

          and free of any other charge, claim, encumbrance, limitation or

          restriction (including any restriction on the right to vote, sell

          or otherwise dispose of such capital stock or other ownership

          interests) and (ii) there are not now, and at the Effective Time

          there will not be, any outstanding subscriptions, options,

          warrants, calls, rights, convertible securities or other

          agreements or commitments of any character relating to the issued

          or unissued capital stock or other securities of any of the 


                                          31


<PAGE>


          Company's subsidiaries, or otherwise obligating the Company or

          any such subsidiary to issue, transfer or sell any such

          securities or to make any payments in respect of any of its

          securities or its equity.

               4.16.  No Default.  Neither the Company nor any of its
                      ----------

          subsidiaries which would be a "significant subsidiary" within the

          meaning of Regulation S-X (a "Significant Subsidiary") is in

          default or violation (and no event has occurred which with notice

          or the lapse of time or both would constitute a default or

          violation) of any term, condition or provision of (a) the

          Certificate or the By-Laws of the Company, (b) the organizational

          documentation of any Significant Subsidiary, or (c) except as set

          forth in Schedule 4.16, any note, bond, mortgage, indenture,

          license, contract, franchise, permit, lease, agreement or other

          instrument or obligation to which the Company or any of its

          Significant Subsidiaries is a party or by which they or any of

          their properties or assets may be bound, except for defaults or

          violations which, in the case of clauses (b) or (c) of this

          sentence, will not, individually or in the aggregate, have a

          material adverse effect on the financial condition, properties,

          business or results of operations of the Company and its

          Significant Subsidiaries taken as a whole.

               4.17.  Taxes.  (a) Except as set forth in Schedule 4.17, the
                      -----

          Company has filed all federal, state, local and foreign tax

          returns required to be filed by itself and by each of its and any

          member of its consolidated, combined or similar group (each such

          member a "Tax Affiliate") and by any of the Company's 


                                          32


<PAGE>


          subsidiaries and has paid or caused to be paid, or has made

          adequate provision or set up adequate accruals or reserves which,

          in the aggregate, are adequate under GAAP in respect of,

          liabilities for taxes required to be paid in respect of the

          periods for which returns are due, and has established (or will

          establish at least quarterly) similar accruals or reserves for

          the payment of all taxes payable in respect of periods subsequent

          to the last of such periods required to be so accrued or

          reserved, as the case may be.  Except as set forth in Schedule

          4.17, neither the Company nor any of its Tax Affiliates or

          subsidiaries has entered into any written agreement or other

          document waiving or extending the time to assess any taxes due to

          any United States jurisdiction ("Domestic Taxes") nor, to the

          knowledge of the executive officers of the Company, has any such

          entity entered into any such agreement or other document in

          respect of any tax due to any jurisdiction outside the United

          States.  Except as set forth in Schedule 4.17, the tax returns of

          the Company, its Tax Affiliates and subsidiaries of the Company

          relating to Domestic Taxes are not under active audit by the

          Internal Revenue Service or any comparable state or local agency. 

          The open taxable years of the Company, its Tax Affiliates and its

          subsidiaries relating to United States federal income taxes are

          set forth in Schedule 4.17.  At no time within the last five

          years, and to the knowledge of the executive officers of the

          Company, (i) at no time in the preceding eight years, have the

          Company, any of its Tax Affiliates or any of its subsidiaries

          ever filed a consent under Section 341(f) of the Internal Revenue


                                          33


<PAGE>


          Code of 1986, as amended (the "Code"), concerning collapsible

          corporations, (ii) except as set forth on Schedule 4.17, none of

          the Company, any of its Tax Affiliates or any of its subsidiaries

          has made any payments, is obligated to make any payments, or is a

          party to any agreement that under certain circumstances obligates

          it to make any payments that will not be deductible under

          Sections 280G or 162(m) of the Code; provided, however, that the

          foregoing representation will not apply to any payments made as a

          result of this Agreement or the transactions contemplated hereby,

          (iii) the Company is not currently a United States real property

          holding corporation within the meaning of Section 897(c)(2) of

          the Code, (iv) each of the Company, each of its Tax Affiliates

          and each of its subsidiaries has disclosed on its federal income

          Tax Returns all positions taken therein that could give rise to a

          material understatement of federal income tax within the meaning

          of Section 6662 of the Code, (v) none of the Company, any of its

          Tax Affiliates or any of its subsidiaries is a party to any tax

          allocation or sharing agreement other than as set forth in

          Schedule 4.17, and (vi) none of the Company, any of its Tax

          Affiliates or any of its subsidiaries (A) has been a member of an

          affiliated group filing a consolidated federal income tax return

          (other than a group the common parent of which was the Company)

          for any open taxable year or (B) has any liability for the taxes

          of any person or entity (other than any of the Company and any of

          its Affiliates and any of its subsidiaries) under Treas. Reg.

          Sec. 1.1502-6 (or any similar provision of state, local or foreign

          law), as a transferee or successor, by contract, or otherwise 


                                          34


<PAGE>


          except as set forth in Schedule 4.17 or as otherwise disclosed to

          Purchaser.

                    (b)  For the purposes of this Section, (i) the term

          "tax" means income, gross receipts, payroll, employment, excise,

          severance, stamp, windfall profits, environmental (including

          taxes under Section 59A of the Code), customs duties, capital

          stock, franchise, profits, withholding, social security (or

          similar), unemployment, disability, real property, personal

          property, sales, use, transfer, registration, value added,

          alternative or add-on minimum, estimated or other tax of any

          kind, levies, penalties, or interest imposed by any United States

          federal, state, local and foreign or other taxing authority on

          the Company or any of its Tax Affiliates, and (ii) the term "tax

          return" includes any return, declaration, claim for refund or

          information return relating to taxes, including without

          limitation any schedule or attachment thereto and including any

          amendment thereof.

               4.18.  Insurance.  Schedule 4.18 lists all insurance
                      ---------

          policies carried by the Company or any of its subsidiaries

          insuring occurrences or claims on or made on the date hereof. 

          There is no default by the Company or any subsidiary with respect

          to any provision contained in any such insurance policy which

          would permit the denial of coverage or cancellation of coverage

          thereunder, except for defaults or failures which, individually

          or in the aggregate, would not have a material adverse effect on

          the Company and its subsidiaries taken as a whole.


                                          35


<PAGE>


               4.19.  Benefit Plans.  (a) Schedule 4.19(a) lists (i) the
                      -------------

          material "employee benefit plans" (within the meaning of

          Section 3(3) of the Employee Retirement Income Security Act of

          1974, as amended ("ERISA")), which the Company or any of its

          subsidiaries maintains or sponsors or with respect to which the

          Company or any of its subsidiaries has any material liability

          (actual or contingent, primary or secondary), and (ii) all other

          (A) employee benefit plans, programs or arrangements, (B) stock

          purchase, stock option, severance, bonus, incentive and deferred

          compensation plans, (C) written employment contracts, and (D)

          change-in-control agreements which the Company or any of its

          subsidiaries maintains, sponsors or is a party to or with respect

          to which the Company or any of its subsidiaries has any material

          liability.  (The plans, programs, arrangements, contracts and

          agreements referred to in the preceding sentence are collectively

          referred to herein as the "Benefit Plans.")

                    (b)  Except as set forth on Schedule 4.19(b), (i) the

          reserves reflected in the balance sheet contained in the audited

          financial statements for the period ending December 31, 1994

          (together with all footnotes attached thereto, the "Balance

          Sheet") relating to any unfunded benefits under the Benefit Plans

          were adequate in the aggregate under GAAP as of December 31, 1994

          and (ii) neither the Company nor any of its subsidiaries has

          incurred any material unfunded liability in respect of any such

          plans since that date.

                    (c)  There are no suits or claims pending or, to the

          knowledge of the Company's executive officers, threatened 


                                          36


<PAGE>


          relating to or for benefits under the Benefit Plans, except for

          those suits or claims set forth on Schedule 4.19(c) or which,

          individually or in the aggregate, will not have a material

          adverse effect on the business, financial condition or results of

          operation of the Company or its subsidiaries, taken as a whole.

                    (d)  (i)  Each Benefit Plan has been established and

          administered in all material respects in accordance with its

          terms, and in all material respects in compliance with the

          applicable provisions of ERISA, the Code and other applicable

          laws, rules and regulations and (ii) each Benefit Plan which is

          intended to be qualified within the meaning of Code Section

          401(a) is so qualified and nothing has occurred, to the knowledge

          of the executive officers of the Company, whether by action or

          failure to act, which is reasonably expected to cause the loss of

          such qualification except where such loss of qualification would

          not have a material adverse effect on the business, financial

          condition or results of operation of the Company or its

          subsidiaries, taken as a whole.

                    (e)  Except as set forth on Schedule 4.19(e), (i) no

          Benefit Plan currently has any "accumulated funding deficiency"

          as such term is defined in ERISA Section 302 and Code Section 412

          (whether or not waived); (ii) to the knowledge of the executive

          officers of the Company, no event or condition exists which is a

          reportable event within the meaning of ERISA Section 4043 with

          respect to any Benefit Plan that is subject to Title IV of ERISA;

          (iii) each member of the Company's Controlled Group (as defined

          below) has made all required premium payments when due to the 


                                          37


<PAGE>


          Pension Benefit Guaranty Corporation ("PBGC"); (iv) neither the

          Company nor any member of its Controlled Group is subject to any

          liability to the PBGC for any plan termination; (v) no amendment

          has occurred which requires the Company or any member of its

          Controlled Group to provide security pursuant to Code Section

          401(a)(29); and (vi) neither the Company nor any member of its

          Controlled Group has engaged in a transaction which is reasonably

          likely to subject it to liability under ERISA Section 4069,

          except, in each case, where any such circumstance will not have a

          material adverse effect on the business, financial condition or

          results of operations of the Company and its subsidiaries, taken

          as a whole.  For the purposes of this Section 4.19, the term

          "Controlled Group" means all corporations, trades or businesses

          which, together with the Company, are treated as a single

          employer under Section 414 of the Code.

                    (f)  No Benefit Plan is a multiemployer plan (within

          the meaning of Section 3(37) of ERISA) and neither the Company

          nor any member of its Controlled Group is reasonably likely to

          incur any liability to any multiemployer plan nor is engaged in a

          transaction which is reasonably expected to subject the Company

          to any material liability under ERISA Section 4212(c).

               4.20.  Labor Matters.  Except as set forth in Schedule 4.20,
                      -------------

          (a) neither the Company nor any of its subsidiaries is party to

          an unexpired collective bargaining agreement or other unexpired

          material contract or agreement with any labor organization or

          other representative of employees nor is any such contract being

          negotiated; (b) there is no material unfair labor practices 


                                          38


<PAGE>


          charge or complaint pending nor, to the knowledge of the

          executive officers of the Company, threatened, with regard to

          employees of the Company or any of its subsidiaries; (c) there is

          no labor strike, material organized slowdown, material organized

          work stoppage or other material organized labor controversy in

          effect or, to the knowledge of the executive officers of the

          Company, threatened against the Company or any of its

          subsidiaries; (d) as of the date hereof, to the knowledge of the

          executive officers of the Company, no representation question

          exists and no campaigns are being conducted to solicit cards from

          the employees of the Company or any subsidiary of the Company to

          authorize representation by any labor organization; (e) neither

          the Company nor any subsidiary of the Company is party to, or is

          otherwise bound by, any consent decree with any governmental

          authority relating to employees or employment practices of the

          Company or any subsidiary of the Company which is material to the

          Company or its subsidiaries taken as a whole; and (f) the Company

          and each subsidiary of the Company is in compliance with all

          applicable agreements, contracts and policies relating to

          employment, employment practices, wages, hours and terms and

          conditions of employment of the employees except where failure to

          be in compliance with each such agreement, contract and policy is

          not, individually or in the aggregate, reasonably likely to have

          a material adverse effect on the financial condition, properties,

          business or results of operations of the Company and its

          subsidiaries taken as a whole.


                                          39


<PAGE>


               4.21.  Certain Environmental Matters.  To the knowledge of
                      -----------------------------

          the executive officers of the Company, (a) the reserves reflected

          in the Balance Sheet relating to environmental matters were

          adequate under GAAP as of December 31, 1994, and neither the

          Company nor any of its subsidiaries has incurred any material

          liability in respect of any environmental matter since that date,

          and (b) the SEC Documents include all information relating to

          environmental matters required to be included therein under the

          rules and regulations of the Commission applicable thereto.   

                                    V.  COVENANTS
                                        ---------

               5.1.  Acquisition Proposals.  Neither the Company nor any of
                     ---------------------

          its subsidiaries may, directly or indirectly, and each will

          instruct and otherwise use its reasonable best efforts to cause

          its affiliates that are controlled by the Company, and the

          officers, directors, employees, agents or advisors or other

          representatives or consultants of the Company not to, encourage,

          solicit, initiate, engage or participate in discussions or

          negotiations with, or provide information to, any Person (as

          hereafter defined) (other than Parent, Purchaser or subsidiaries,

          affiliates or representatives of any of the foregoing) in

          connection with any tender offer, exchange offer, merger,

          consolidation, business combination, sale of substantial assets,

          sale of securities, liquidation, dissolution or similar

          transaction involving the Company or any of its subsidiaries or

          divisions, including, without limitation, Midgard Energy Company. 

          Notwithstanding the foregoing, the Company may do any of the

          foregoing if outside counsel to the Company advises the Company's


                                          40


<PAGE>


          Board of Directors that any such action is required for the

          Company's directors to satisfy their fiduciary duties to the

          Company and its constituencies under applicable law.  The Company

          will (a) promptly notify Parent in the event of any discussion,

          negotiation, proposal or offer of the type referred to in the

          first sentence of this Section 5.1 or any decision to furnish

          information or take any other action referred to in the second

          sentence of this Section 5.1 and (b) promptly furnish Parent

          copies of all written information furnished to any Person

          pursuant to the second sentence of this Section 5.1 to the extent

          not previously furnished to Parent.

               5.2.  Interim Operations.  During the period from the date
                     ------------------

          of this Agreement to the earlier of the time that the designees

          of Parent have been elected to, and constitute a majority of, the

          Board of Directors of the Company pursuant to Section 1.4 hereof

          or the Effective Time, except as specifically contemplated by

          this Agreement, as set forth in Schedule 5.2 or as otherwise

          approved by Parent in a writing which makes express reference to

          this Section 5.2:

                    5.2.1.  Conduct of Business.  The Company will, and
                            -------------------

               will cause each of its subsidiaries to, conduct their

               respective businesses only in, and not take any action

               except in, the ordinary and usual course of business

               substantially consistent with past practice.  The Company

               will use reasonable efforts to preserve intact the business

               organization of the Company and each of its subsidiaries, to

               keep available the services of its and their present 


                                          41


<PAGE>


               officers and key employees and to preserve the goodwill of

               those having business relationships with it or its

               subsidiaries.

                    5.2.2.  Certificate and By-Laws.  The Company will not
                            -----------------------

               and will not permit any of its subsidiaries to make or

               propose any change or amendment to their respective

               certificates of incorporation or by-laws (or comparable

               governing instruments), except as may be required by law.

                    5.2.3.  Capital Stock.  The Company will not and will
                            -------------

               not permit any of its subsidiaries to authorize for

               issuance, issue, sell or deliver any shares of capital stock

               or any other securities of any of them (other than pursuant

               to the Options, Options and Converts, the $4.00 Preferred

               Stock, the $9.75 Preferred Stock or the 401(k) Plan or the

               issuance of shares issued under the terms of the Director

               Plan in a manner consistent with any such plan or past

               practice) or issue any securities convertible into or

               exchangeable for, or options, warrants to purchase, scrip,

               rights to subscribe for, calls or commitments of any

               character whatsoever relating to, or enter into any contract

               with respect to the issuance of, any shares of capital stock

               or any other securities of any of them (other than pursuant

               to the Options, Options and Converts, the $4.00 Preferred

               Stock, the $9.75 Preferred Stock, the 401(k) Plan (or in

               connection with the 401(k) Plan or the Director Plan as

               aforesaid), purchase or otherwise acquire or enter into any

               contract with respect to the purchase or voting of shares of


                                          42


<PAGE>


               their capital stock, or adjust, split, combine or reclassify

               any of their capital stock or other securities, or make any

               other changes in their capital structures.

                    5.2.4.  Dividends.  The Company will not and will not
                            ---------

               permit any of its subsidiaries to declare, set aside, pay or

               make any dividend or other distribution or payment (whether

               in cash, stock or property) with respect to, or purchase or

               redeem, any shares of the capital stock of any of them other

               than (a) regular quarterly cash dividends on the $4.00

               Preferred Stock, the $9.75 Preferred Stock and the $2.50

               Preferred Stock, (b) dividends, distributions or payments

               paid by its subsidiaries to the Company or its subsidiaries

               with respect to their capital stock, (c) the Rights in

               accordance with the Rights Agreement, and (d) loans and

               payments from the Company to any of its subsidiaries or from

               any of such subsidiaries to the Company or another such

               subsidiary.

                    5.2.5.  Debt.  Except as set forth in Schedule 5.2.5,
                            ----

               the Company and its subsidiaries will not, except in the

               ordinary course of business, (a) incur or assume any

               indebtedness, (b) assume, guarantee, endorse or otherwise

               become liable (whether directly, contingently or otherwise)

               for the obligation of any other Person except in the

               ordinary course of business and consistent with past

               practice, or (c) make any loans, advances or capital

               contributions to, or investments (other than intercompany

               accounts and short-term investments pursuant to customary 


                                          43


<PAGE>


               cash management systems of the Company in the ordinary

               course and consistent with past practices) in, any other

               Person other than such of the foregoing as are made by the

               Company to or in a wholly owned subsidiary of the Company.

               5.3.  Employee Plans, Compensation, Etc.  (a) Except as
                     ----------------------------------

          provided in Section 2.6 hereof, this Section 5.3 or as set forth

          in Schedule 5.3 or required by applicable law, prior to the

          Effective Time the Company will not and will not permit any of

          its subsidiaries to adopt or amend any bonus, profit sharing,

          compensation, severance, termination, stock option, pension,

          retirement, deferred compensation, welfare benefit plan, change-

          in-control agreement, restricted stock, performance unit,

          employment or other employee benefit agreements, trusts, plans,

          funds or other arrangements for the benefit or welfare of any

          director, officer or employee, or (except, other than with

          respect to the Senior Executives, for normal increases in the

          ordinary course of business that are consistent with past

          practices and that, in the aggregate, do not result in a material

          increase in benefits or compensation expense to the Company or

          pursuant to collective bargaining agreements or other contracts

          presently in effect) increase in any manner the compensation or

          fringe benefits of any director or officer or pay any benefit not

          required by any existing plan, arrangement or contract (including

          without limitation the granting of stock options, stock

          appreciation rights, shares of restricted stock or performance

          units) or take any action or grant any benefit not expressly

          required under the terms of any existing contracts, trusts, 


                                          44


<PAGE>


          plans, funds or other such arrangements or enter into any

          contract to do any of the foregoing.

                    (b)  Subject to Purchaser's purchase of Common Stock

          pursuant to the Offer and for a period of 12 months following the

          Effective Time, the Company or Surviving Corporation, as the case

          may be, will continue without amendment or change, except changes

          which increase compensation or benefits paid or payable

          thereunder or as may be required by law, the Benefit Plans and

          other sponsored, maintained or offered compensation and benefit

          policies, practices, programs and arrangements which provide

          compensation or benefits to employees of the Company or its

          subsidiaries.  Anything in the preceding sentence to the contrary

          notwithstanding, (i) to the extent any Benefit Plan, or such

          other compensation or benefit policy, practice, program or

          arrangement other than any stock option, restricted stock or

          other stock-based award plan or program ("Stock Plans") so

          allows, the Surviving Corporation may replace any of such

          individual plans, policies, practices, programs or arrangements

          with another plan, policy, practice, program or arrangement

          providing, in the aggregate, not less than a substantially

          equivalent level of compensation or benefits, as the case may be,

          and (ii) the Company or the Surviving Corporation, as the case

          may be, may amend or replace any Stock Plan of the Company with

          another plan, policy, practice, program or arrangement that the

          Board of Directors of the Company or the Surviving Corporation,

          as the case may be, determines in good faith provides comparable

          incentive compensation opportunities.


                                          45


<PAGE>


                    (c)  Except as may be expressly provided in a valid

          written waiver voluntarily signed by an affected employee, the

          Company will honor and, on and after the Effective Time, Parent

          will cause the Surviving Corporation to honor in accordance with

          the terms thereof, without offset, deduction, counterclaim,

          interruption or deferment (other than withholdings under

          applicable law), all employment, change-in-control, severance,

          termination, consulting and unfunded retirement or benefit

          agreements to which the Company or any of its subsidiaries is

          presently a party ("Benefits Agreements").  All of the Benefits

          Agreements which require the Company to make payments in excess

          of $250,000 from and after the Effective Date are set forth in

          Schedule 5.3.

                    (d)  Without limiting the obligations of Parent,

          Purchaser, the Company or the Surviving Corporation contained

          herein, the parties will take the actions, if any, with respect

          to employment, severance and other benefits as set forth in

          Schedule 5.3.

                    (e)  Parent will consult with the human resources

          department of the Company regarding the appropriate treatment of

          the insurance, compensation and other benefit plans of the

          Company after the Merger.

               5.4.  Access and Information.  The Company will (and will
                     ----------------------

          cause each of its subsidiaries to) afford to Parent and its

          representatives (including without limitation directors, officers

          and employees of Parent and its affiliates, and counsel,

          accountants and other professionals retained by Parent) such 


                                          46


<PAGE>


          access, during normal business hours throughout the period prior

          to the Effective Time, to the Company's books, records (including

          without limitation tax returns and work papers of the Company's

          independent auditors), properties, personnel and to such other

          information as Parent reasonably requests and will permit Parent

          to make such inspections as Parent may reasonably request and

          will cause the officers of the Company and those of its

          subsidiaries to furnish Parent with such financial and operating

          data and other information with respect to the business,

          properties and personnel of the Company and its subsidiaries as

          Parent may from time to time reasonably request, provided,

          however, that no investigation pursuant to this Section 5.4 will

          affect or be deemed to modify any of the representations or

          warranties made by the Company in this Agreement.  Subject to the

          requirements of law, Parent will hold in confidence, and will

          instruct and use its reasonable best efforts to cause its

          representatives to keep confidential, all such non-public

          information it may acquire in its investigation pursuant to this

          Section 5.4, and if this Agreement is terminated, Parent will,

          and will instruct and use its reasonable best efforts to cause

          its representatives to, destroy or deliver to the Company all

          documents, work papers and other material (including copies)

          obtained by Parent or such representatives pursuant to this

          Section 5.4 and such of the foregoing as has been furnished by

          the Company to Parent or Purchaser prior to the date hereof,

          whether so obtained or furnished before or after the execution

          hereof.  Nothing in this Section 5.4 will require the Company to 


                                          47


<PAGE>


          afford Parent or its representatives access to any information,

          documents or materials which are privileged or which are

          confidential and as to which such disclosure would cause the loss

          of privilege or breach the terms of a confidentiality agreement.

               5.5.  Certain Filings, Consents and Arrangements.  Parent,
                     ------------------------------------------

          Purchaser and the Company will (a) promptly make their respective

          filings, and will thereafter use their best efforts promptly to

          make any required submissions under the HSR Act with respect to

          the Offer, the Merger and the other transactions contemplated by

          this Agreement and (b) cooperate with one another (i) in promptly

          determining whether any filings are required to be made or

          consents, approvals, permits or authorizations are required to be

          obtained under any other federal, state or foreign law or

          regulation and (ii) in promptly making any such filings,

          furnishing information required in connection therewith and

          seeking timely to obtain any such consents, approvals, permits or

          authorizations.

               5.6.  State Takeover Statutes.  The Company will use its
                     -----------------------

          reasonable best efforts to (a) exempt the Company, the Offer and

          the Merger from the requirements of any state takeover law by

          action of the Company's Board of Directors or otherwise and (b)

          assist in any challenge by Purchaser to the validity or

          applicability to the Offer or the Merger of any state takeover

          law.

               5.7.  Proxy Statement.  As soon as reasonably practicable
                     ---------------

          after the date hereof, the Company will, if required by

          applicable law in order to consummate the Merger, prepare the 


                                          48


<PAGE>


          Proxy Statement, file it with the Commission and mail it to all

          holders of shares of Voting Stock.  Parent, Purchaser and the

          Company will cooperate with each other in the preparation of the

          Proxy Statement; without limiting the generality of the

          foregoing, Parent and Purchaser will furnish to the Company the

          information relating to Parent and Purchaser required by the

          Exchange Act to be set forth in the Proxy Statement.  The

          Company, acting through its Board of Directors, subject to the

          fiduciary duties of the Company's Board of Directors as advised

          by counsel, will include in the Proxy Statement the

          recommendation of its Board of Directors that stockholders of the

          Company vote in favor of the adoption of this Agreement and use

          its reasonable best efforts to secure such adoption.

               5.8.  Indemnification and Insurance.  For seven years after
                     -----------------------------

          the Effective Time, Parent will cause the Surviving Corporation

          to indemnify, defend and hold harmless the present and former

          officers, directors, employees and agents of the Company and its

          subsidiaries (an "Indemnified Party") against all losses, claims,

          damages or liabilities arising out of actions or omissions

          occurring on, prior to or after the Effective Time (whether or

          not based in whole or in part on the sole or concurrent

          negligence of the Indemnified Party or on the theory of strict

          products liability) to the full extent provided under Delaware

          law, the Certificate and By-Laws of the Company in effect at the

          date hereof and under all agreements to which the Company is a

          party as of the date hereof, including without limitation

          provisions relating to advances of expenses incurred in the 


                                          49


<PAGE>


          defense of any action or suit (including without limitation

          attorneys' fees of counsel selected by the Indemnified Party),

          provided that any determination required to be made with respect

          to whether an Indemnified Party's conduct complies with the

          standards set forth under Delaware law, the Certificate or

          By-Laws of the Company or under any such contract will be made by

          independent counsel selected by the Indemnified Party and

          reasonably satisfactory to the Surviving Corporation.  Nothing in

          this Agreement shall diminish or impair the rights of any

          Indemnified Party under the Certificate or By-Laws of the Company

          or any agreement to which the Company is a party at the date

          hereof.  The Surviving Corporation will maintain the Company's

          existing officers' and directors' liability insurance ("D&O

          Insurance") in full force and effect without reduction of

          coverage for a period of seven years after the Effective Time,

          provided, however, that the Surviving Corporation will not be

          required to pay an annual premium therefor in excess of 250% of

          the last annual premium paid prior to the date hereof (the

          "Current Premium"), and, provided, further, however, that if the

          existing D&O Insurance expires, is terminated or cancelled during

          such seven-year period, the Surviving Corporation will use its

          best efforts to obtain as much D&O Insurance as can be obtained

          for the remainder of such period for a premium on an annualized

          basis not in excess of 250% of the Current Premium.

               5.9.  Additional Agreements.  Subject to the terms and
                     ---------------------

          conditions herein provided, each of the parties will use its

          reasonable best efforts to take promptly, or cause to be taken 


                                          50


<PAGE>


          promptly, all actions and to do promptly, or cause to be done

          promptly, all things necessary, proper or advisable under

          applicable laws and regulations to consummate and make effective

          the transactions contemplated by this Agreement, including using

          its reasonable best efforts to obtain all necessary actions or

          non-actions, extensions, waivers, consents and approvals from all

          applicable Governmental Entities, effecting all necessary

          registrations and filings (including without limitation filings

          under the HSR Act) and obtaining any required contractual

          consents, subject, however, to any required vote of the

          stockholders of the Company.  If, at any time after the Effective

          Time, the Surviving Corporation considers or is advised that any

          deeds, bills of sale, assignments, assurances or any other

          actions or things are necessary or desirable to vest, perfect or

          confirm of record or otherwise in the Surviving Corporation its

          right, title or interest in, to or under any of the rights,

          properties or assets of either of the Constituent Corporations

          acquired or to be acquired by the Surviving Corporation as a

          result of, or in connection with the Merger or otherwise to carry

          out the purposes of this Agreement, the officers and directors of

          the Surviving Corporation will be authorized to execute and

          deliver, in the name and on behalf of each of the Constituent

          Corporations or otherwise, all such deeds, bills of sale,

          assignments and assurances and to take and do, in the name and on

          behalf of each of the Constituent Corporations or otherwise, all

          such other actions and things as may be necessary or desirable to

          vest, perfect or confirm any and all right, title and interest 


                                          51


<PAGE>


          in, to and under such rights, properties or assets in the

          Surviving Corporation or otherwise to carry out the purposes of

          this Agreement.

               5.10.  Compliance with Antitrust Laws.  Each of Parent and
                      ------------------------------

          the Company will use its reasonable best efforts to resolve such

          objections, if any, which may be asserted with respect to the

          Offer or the Merger under the antitrust laws.  In the event a

          suit is instituted challenging the Offer or the Merger as

          violative of the antitrust laws, each of Parent and the Company

          will use its best efforts to resist or resolve such suit.  Parent

          and the Company will use their reasonable best efforts to take

          such action as may be required (a) by the Antitrust Division of

          the Department of Justice or the Federal Trade Commission in

          order to resolve such objections as either of them may have to

          the Offer or the Merger under the antitrust laws or (b) by any

          federal or state court of the United States, in any suit brought

          by a private party or Governmental Entity challenging the Offer

          or the Merger as violative of the antitrust laws, in order to

          avoid the entry of, or to effect the dissolution of, any

          injunction, temporary restraining order or other order which has

          the effect of preventing the consummation of the Offer or the

          Merger.

               5.11.  Publicity.  The initial press release announcing this
                      ---------

          Agreement will be a joint press release and thereafter the

          Company and Parent will consult with each other in issuing any

          press releases or otherwise making public statements with respect

          to the transactions contemplated hereby and in making any filings


                                          52


<PAGE>


          with any Governmental Entity or with any national securities

          exchange with respect thereto, and will not issue any such press

          release or make any such public statement prior to such

          consultation except as may be required by law or by obligation

          pursuant to any listing agreement with any national securities

          exchange or the National Association of Securities Dealers or any

          rules or regulations of a foreign securities exchange upon which

          the securities are traded.

               5.12.  Notice of Actions and Proceedings.  The Company will
                      ---------------------------------

          promptly notify Parent of any actions, suits, claims,

          investigations or proceedings commenced or, to the knowledge of

          the executive officers of the Company, threatened in writing

          against, relating to or involving or otherwise affecting the

          Company or any of its subsidiaries which, if pending on the date

          hereof, would have been required to have been disclosed in

          writing pursuant to any Schedule required hereby or which relates

          to the consummation of the Offer or the Merger.

               5.13.  Notification of Certain Other Matters.  The Company
                      -------------------------------------

          will promptly notify Parent of:

                    (a)  any written notice or other written communication

          from any third party alleging that the consent of such third

          party is or may be required in connection with the transactions

          contemplated by this Agreement;

                    (b)  any written notice or other written communication

          from any Governmental Entity in connection with the transactions

          contemplated hereby; and 


                                          53


<PAGE>


                    (c)  any fact, development or occurrence that

          constitutes a material adverse effect on the business, financial

          condition or results of operations of the Company and its

          subsidiaries taken as a whole or is reasonably expected to result

          in such an effect.

               5.14.  Listing of Preferred Stock.  The Company will, and
                      --------------------------

          Parent will cause the Surviving Corporation to, use their

          respective reasonable efforts to continue the listing on the

          New York Stock Exchange of the shares of Preferred Stock which

          are currently listed on such Exchange or, if such shares are

          delisted, to cause such shares of Preferred Stock to be listed on

          another national securities exchange within the United States or

          admitted to trading on the National Association of Securities

          Dealers Automated Quotation System and on other organized

          securities markets in such foreign jurisdictions in which such

          shares are presently traded.  Notwithstanding anything in this

          Agreement to the contrary, the obligations of the Company and

          Parent under this Section 5.14 will survive the Effective Time

          with respect to any series of Preferred Stock until such time as

          the aggregate market value of all outstanding shares of such

          series is less than $2 million or the number of outstanding

          shares of such series is less than 100,000.

               5.15.  Certain Obligations of Parent.  In the event that the
                      -----------------------------

          Company is unable to meet its obligations as they come due,

          whether at maturity or otherwise, including solely for the

          purposes of this Section 5.15 dividend and redemption payments

          with respect to the Preferred Stock, Parent will capitalize the 


                                          54


<PAGE>


          Company in an amount necessary to permit the Company to meet such

          obligations, provided that Parent's aggregate obligation under

          this Section 5.15 shall be (a) limited to the amount of debt

          service obligations under "Tranche 1" of the loan agreement

          contemplated by the Commitment and, to the extent "Tranche 1" is

          replaced by "Tranche 2 and/or Tranche 3" under the Commitment,

          the amount of debt service obligations under such "Tranche 2

          and/or Tranche 3," and (b) reduced by the amount, if any, of

          capital contributions received by the Company after the Effective

          Time and the net proceeds of any sale by the Company of common

          stock or non-redeemable preferred stock after the Effective Time. 

          Notwithstanding anything in this Agreement to the contrary, the

          obligations of Parent under this Section 5.15 will survive until

          the ninth anniversary of the Effective Time.  

                                   VI.  CONDITIONS
                                        ----------

               6.1.  Conditions.  The obligations of Parent, Purchaser and
                     ----------

          the Company to consummate the Merger are subject to the

          satisfaction, at or before the Effective Time, of each of the

          following conditions, as applicable thereto:

                    6.1.1.  Stockholder Approval.  The holders of the
                            --------------------

               Voting Stock shall have duly adopted this Agreement.

                    6.1.2.  Purchase of Shares of Voting Stock.  Purchaser
                            ----------------------------------

               shall have accepted for payment shares of Common Stock

               pursuant to the Offer.

                    6.1.3.  Injunctions; Illegality.  The consummation of
                            -----------------------

               the Merger shall not be precluded or materially restricted

               by any order, injunction, decree or ruling of a court of 


                                          55


<PAGE>


               competent jurisdiction or Governmental Entity (each party

               agreeing to use its reasonable best efforts to rectify any

               such occurrence), and there shall not have been any action

               taken or any statute, rule or regulation enacted,

               promulgated or deemed applicable to the Merger by any

               Governmental Entity which prevents or materially restricts

               the consummation of the Merger or that would make the

               acquisition or holding by Parent or its subsidiaries of the

               shares of Common Stock or shares of common stock of the

               Surviving Corporation illegal.

                    6.1.4.  HSR Act.  Any applicable waiting period under
                            -------

               the HSR Act shall have expired or been terminated.

               6.2.  Parent Obligations.  The obligations of Parent and
                     ------------------

          Purchaser to consummate the Merger are subject to the

          satisfaction at or prior to the Effective Time of the additional

          conditions that (a) the Company in all material respects shall

          have satisfied and complied with each of the covenants of the

          Company contained herein, (b) the representations and warranties

          of the Company contained in this Agreement shall be true and

          correct in all material respects as of the date of this Agreement

          and as of the Closing Date (except for representations and

          warranties made as of a specified date, which shall be true and

          correct in all material respects as of such specified date) and

          (c) Purchaser and Parent shall have the right to draw down funds

          under the loan agreement contemplated by the Commitment.


                                          56


<PAGE>


                                 VII.  MISCELLANEOUS
                                       -------------

               7.1.  Termination.  This Agreement may be terminated and the
                     -----------

          Merger contemplated hereby may be abandoned (a) by the mutual

          consent of the Boards of Directors of Parent, Purchaser and the

          Company; (b) by Parent and Purchaser, on the one hand, or the

          Company, on the other hand, if the Offer expires or is terminated

          or withdrawn in accordance with the terms hereof without any

          shares of Common Stock being purchased thereunder or the Offer is

          terminated, or has not been commenced in accordance with the

          terms hereof by the close of business on March 7, 1995, or if

          Purchaser has not purchased shares of Common Stock validly

          tendered and not withdrawn pursuant to the Offer in accordance

          with the terms hereof within 75 calendar days after commencement

          of the Offer; provided, however, that the party seeking to

          terminate this Agreement pursuant to this Section 7.1(b) is not

          in material breach of this Agreement; (c) by the Company, if

          Parent or Purchaser materially breaches any of the

          representations and warranties or covenants contained in this

          Agreement, or by Parent and Purchaser if the Company materially

          breaches any of the representations and warranties or covenants

          contained in this Agreement; (d) by either Parent and Purchaser

          or the Company, if the Merger is not consummated prior to

          June 30, 1995; provided, however, that the right to terminate

          this Agreement under this Section 7.1(d) will not be available to

          any party whose failure to fulfill any obligation under this

          Agreement has been the cause of, or resulted in, the failure of

          the Effective Time to occur on or before such date; (e) by either


                                          57


<PAGE>


          Parent and Purchaser, on the one hand, or the Company, on the

          other hand, if either one (or any permitted assignee hereunder)

          is restrained, enjoined or otherwise precluded by an order,

          decree, ruling or injunction (other than an order or injunction

          issued on a temporary or preliminary basis) of a court, domestic

          or foreign, of competent jurisdiction or other Governmental

          Entity from consummating the Merger or making the acquisition or

          holding by Parent or its subsidiaries of the shares of Common

          Stock or shares of common stock of the Surviving Corporation

          illegal and all means of appeal and all appeals from such order

          decree, ruling, injunction or other action have been finally

          exhausted; (f) by the Company if the Board of Directors of the

          Company determines that it will not recommend acceptance of the

          Offer and approval of the Merger by the Company's stockholders

          (or if such recommendation is withdrawn) based upon the advice of

          outside counsel that such action is necessary for the Board of

          Directors to comply with its fiduciary duties to stockholders

          under applicable law; and (g) by Parent and Purchaser, if (i) the

          Board of Directors of the Company shall not have recommended or

          shall withdraw, modify or change its recommendation relating to

          the Merger or the Offer in a manner materially adverse to Parent

          or shall have resolved to do any of the foregoing; (ii) the Board

          of Directors of the Company shall have recommended to the

          stockholders of the Company that they accept or approve, or the

          Company or any of its subsidiaries shall have agreed to engage

          in, a Competing Transaction; or (iii) any Person shall have

          acquired beneficial ownership or the right to acquire beneficial 


                                          58


<PAGE>


          ownership or any "group" (as such term is defined under Section

          13(d) of the Exchange Act and the rules and regulations

          promulgated thereunder) shall have been formed which beneficially

          owns, or has the right to acquire "beneficial ownership" (as

          defined in the Rights Agreement) of, more than 20% of the then-

          outstanding shares of Common Stock of the Company.  For the

          purposes of this Agreement, "Competing Transaction" means any of

          the following involving the Company or any of its subsidiaries:

          (i) any merger, consolidation, share exchange, business

          combination or other similar transaction except for such of the

          foregoing as to which the only parties are the Company or one or

          more subsidiaries of the Company; (ii) any sale, lease, exchange,

          mortgage, pledge, transfer or other disposition of the assets of

          the Company or any of its subsidiaries constituting 5% or more of

          the consolidated assets of the Company or accounting for 5% or

          more of the consolidated revenues of the Company in a single

          transaction or series of related transactions involving any

          Person other than the Company or one or more subsidiaries of the

          Company; or (iii) any tender or exchange offer for 20% or more of

          the outstanding shares of Voting Stock or the filing of a

          registration statement under the Securities Act in connection

          therewith.  In the event of any termination and abandonment

          pursuant to this Section 7.1, no party hereto (or any of its

          directors or officers) will have any liability or further

          obligation to any other party to this Agreement, except for

          obligations under the last sentences of Sections 1.1 and 1.3, the

          second sentence of Section 5.4 and all of Section 7.10 hereof and


                                          59


<PAGE>


          except that nothing herein will relieve any party from liability

          for any breach of this Agreement.  Any action by the Company to

          terminate this Agreement pursuant to this Section 7.1 will

          require only the approval of a majority of the directors of the

          Company then in office who are directors of the Company on the

          date hereof, or persons nominated or elected to succeed such

          directors by a majority of such directors (the "Continuing

          Directors").

               7.2.  Non-Survival of Representations, Warranties and
                     -----------------------------------------------

          Agreements.  The representations and warranties or agreements in
          ----------

          this Agreement will terminate at the Effective Time or the

          earlier termination of this Agreement pursuant to Section 7.1, as

          the case may be, provided, however, that if the Merger is

          consummated, Sections 2.6, 5.3, 5.8, 5.9, 5.14 and 5.15 hereof

          will survive the Effective Time to the extent contemplated by

          such Sections, and provided further, however, that the last

          sentences of Sections 1.1 and 1.3, the second sentence of

          Section 5.4 and all of Section 7.10 hereof will in all events

          survive any termination of this Agreement.

               7.3.  Waiver and Amendment.  Subject to applicable
                     --------------------

          provisions of the DGCL, any provision of this Agreement may be

          waived at any time by the party which is, or whose stockholders

          are, entitled to the benefits thereof, and this Agreement may be

          amended or supplemented at any time, provided that no amendment

          will be made after any stockholder approval of the adoption of

          the Merger Agreement which reduces the Merger Price without

          further approval of the holders of the Voting Stock, provided 


                                          60


<PAGE>


          further that any action by the Company to waive or amend any

          provision of this Agreement will require the approval of a

          majority of the Continuing Directors.  No such waiver, amendment

          or supplement will be effective unless in a writing which makes

          express reference to this Section 7.3 and is signed by the party

          or parties sought to be bound thereby.

               7.4.  Entire Agreement.  This Agreement contains the entire
                     ----------------

          agreement among Parent, Purchaser and the Company with respect to

          the Offer, the Merger and the other transactions contemplated

          hereby and thereby, and supersedes all prior agreements among the

          parties with respect to such matters other than, prior to the

          Effective Time, the Confidentiality Agreement.

               7.5.  Applicable Law.  This Agreement will be governed by
                     --------------

          and construed in accordance with the laws of the State of

          Delaware, without giving effect in the principles of conflict of

          laws of that State.

               7.6.  Interpretation.  For purposes of this Agreement, a
                     --------------

          "subsidiary" of a corporation means any corporation or other

          legal entity (including without limitation partnerships or

          limited liability companies) more than 50% of the outstanding

          voting securities or similar rights of which are directly or

          indirectly owned by such other corporation and "Person" means an

          individual or legal entity.  The descriptive headings contained

          herein are for convenience and reference only and will not affect

          in any way the meaning or interpretation of this Agreement.

               7.7.  Notices.  All notices and other communications
                     -------

          hereunder will be in writing and will be given by delivery (and 


                                          61


<PAGE>


          will be deemed to have been duly given upon receipt) in person,

          by cable, facsimile transmission, telegram, telex or other

          standard form of telecommunications, or by registered or

          certified mail, postage prepaid, return receipt requested,

          addressed as follows:

               If to the Company to:

                    Maxus Energy Corporation
                    717 North Harwood Street
                    Dallas, Texas 75201
                    Attention:  General Counsel
                    Telephone:  214/953-2000
                    Telecopy:   214/979-1986

               With a copy to:

                    Jones, Day, Reavis & Pogue
                    599 Lexington Avenue, 22nd Floor
                    New York, New York  10022
                    Attention:  Robert A. Profusek, Esq.
                    Telephone:  212/326-3800
                    Telecopy:   212/755-7306

               If to Parent or Purchaser to:

                    YPF Sociedad Anonima
                    Avenida Pte. Roque Saenz Pena 777
                    Buenos Aires 1364, Argentina
                    Attention:  President
                    Telephone:  011-541-329-5705
                    Telecopy:   011-541-329-5704

               With a copy to:

                    Andrews & Kurth L.L.P.
                    4200 Texas Commerce Tower
                    Houston, Texas 77002
                    Attention:  P. Dexter Peacock, Esq.
                    Telephone:  713/220-4354
                    Telecopy:  713/220-3690


          or to such other address as any party may have furnished to the

          other parties in writing in accordance herewith.


                                          62


<PAGE>


               7.8.  Counterparts.  This Agreement may be executed in any
                     ------------

          number of counterparts, each of which will be deemed to be an

          original but all of which together will constitute but one

          agreement.

               7.9.  Parties in Interest; Assignment.  Except for
                     -------------------------------

          Sections 2.6 and 5.3 hereof (which are intended to be for the

          benefit of directors and Senior Executives to the extent

          contemplated thereby and their beneficiaries, and may be enforced

          by such persons) and Section 5.8 hereof (which is intended to be

          for the benefit of directors, officers, agents and employees to

          the extent contemplated thereby and their beneficiaries, and may

          be enforced by such persons), this Agreement is not intended to

          nor will it confer upon any other person (other than the parties

          hereto) any rights or remedies.  Except as otherwise expressly

          provided herein, this Agreement is binding upon and is solely for

          the benefit of the parties hereto and their respective

          successors, legal representatives and assigns.  Purchaser will

          have the right (a) to assign to Parent or any direct or indirect

          wholly owned subsidiary of Parent any and all rights and

          obligations of Purchaser under this Agreement, including without

          limitation the right to substitute in its place Parent or such a

          subsidiary as one of the constituent corporations in the Merger

          (such subsidiary assuming all of the obligations of Purchaser in

          connection with the Merger), provided that any such assignment

          will not relieve Parent or Purchaser from any of its obligations

          hereunder, and (b) to transfer to Parent or to any direct or

          indirect wholly owned subsidiary of Parent the right to purchase 


                                          63


<PAGE>


          shares of Common Stock tendered pursuant to the Offer, provided

          that any such transfer will not relieve Purchaser from any of its

          obligations hereunder.

               7.10.  Expenses; Termination Fee.  Whether or not the Offer
                      -------------------------

          or Merger is consummated, all costs and expenses incurred in

          connection with the Offer, this Agreement and the transactions

          contemplated hereby will be paid by the party incurring such

          costs and expenses, provided, however, that (a) in the event of a

          termination of this Agreement by the Company pursuant to

          Section 7.1(f) or by Parent and Purchaser pursuant to

          Section 7.1(g)(i) or (ii) hereof, the Company will be obligated

          to promptly pay to Purchaser $20 million in cash, and (b) in the

          event of a termination of this Agreement by the Company or by

          Parent if at the date of such termination any condition to the

          funding of the loans contemplated by the Commitment has not been

          satisfied, provided that at such time no other condition to

          Parent's obligation to consummate the Offer or the Merger, as the

          case may be, is unsatisfied (other than the failure to meet the

          Minimum Share Condition as a result of the failure to obtain such

          funding), Parent and Purchaser, jointly and severally, will be

          obligated to promptly pay to the Company $20 million in cash.

               7.11.  Obligation of Parent.  Whenever this Agreement
                      --------------------

          requires Purchaser to take any action, such requirement will be

          deemed to include an undertaking on the part of Parent to cause

          Purchaser to take such action.

               7.12.  Enforcement of the Agreement.  The parties hereto
                      ----------------------------

          agree that irreparable damage would occur in the event that any 


                                          64


<PAGE>


          of the provisions of this Agreement were not performed in

          accordance with their specific terms or were otherwise breached. 

          It is accordingly agreed that the parties hereto will be entitled

          to an injunction or injunctions to prevent breaches of this

          Agreement and to enforce specifically the terms and provisions

          hereof in any court of the United States or any State of the

          United States having jurisdiction, this being in addition to any

          other remedy to which they are entitled at law or in equity,

          including without limitation under Section 7.10 hereof.

               7.13.  Severability.  If any term or other provision of this
                      ------------

          Agreement is invalid, illegal or incapable of being enforced by

          any rule of law or public policy, all other terms and provisions

          of this Agreement will nevertheless remain in full force and

          effect so long as the economic or legal substance of the

          transactions contemplated hereby is not affected in any manner

          adverse to any party hereto.  Upon any such determination that

          any term or other provision is invalid, illegal or incapable of

          being enforced, the parties hereto will negotiate in good faith

          to modify this Agreement so as to effect the original intent of

          the parties as closely as possible in an acceptable manner to the

          end that the transactions contemplated by this Agreement are

          consummated to the extent possible.

               7.14.  Consent to Jurisdiction and Service of Process. 
                      ----------------------------------------------

          (a) Parent consents to the non-exclusive jurisdiction of any

          court of the State of New York or any United States federal court

          sitting in the Borough of Manhattan, New York City, New York,

          United States, and any appellate court from any thereof, and 


                                          65


<PAGE>


          waives any immunity from the jurisdiction of such courts over any

          suit, action or proceeding that may be brought in connection with

          this Agreement.  Parent irrevocably waives, to the fullest extent

          permitted by law, any objection to any suit, action or proceeding

          that may be brought in connection with this Agreement in such

          courts whether on the grounds of venue, residence or domicile or

          on the ground that any such suit, action or proceeding has been

          brought in an inconvenient forum.  Parent agrees that final

          judgment in any such suit, action or proceeding brought in such

          court shall be conclusive and binding upon Parent and may be

          enforced in any court to the jurisdiction of which Parent is

          subject by suit upon such judgment; provided that service of

          process is effected upon Parent in the manner provided in this

          Agreement.  Notwithstanding the foregoing, any suit, action or

          proceeding brought in connection with this Agreement may be

          instituted in any competent court in Argentina.

                    (b)  Parent agrees that service of all writs, process

          and summonses in any suit, action or proceeding brought in

          connection with this Agreement against Parent in any court

          sitting in the Borough of Manhattan, New York City, New York,

          United States may be made upon CT Corporation System at

          1633 Broadway, New York, New York 10019, whom Parent irrevocably

          appoints as its authorized agent for service of process.  Parent

          represents and warrants that CT  Corporation System has agreed to

          act as Parent's agent for service of process.  Parent agrees that

          such appointment shall be irrevocable so long as this Agreement

          shall remain in effect or until the irrevocable appointment by 


                                          66


<PAGE>


          Parent of a successor in The City of New York as its authorized

          agent for such purpose and the acceptance of such appointment by

          such successor.  Parent further agrees to take any and all

          action, including the filing of any and all documents and

          instruments, that may be necessary to continue such appointment

          in full force and effect as aforesaid.  If CT Corporation System

          shall cease to be Parent's agent for service of process, Parent

          shall appoint without delay another such agent and provide prompt

          written notice to the Company, to the extent known to it, of such

          appointment.  With respect to any such action in any court of the

          State of New York or any United States federal court in the

          Borough of Manhattan, New York City, service of process upon CT

          Corporation System, as the authorized agent of Parent for service

          of process, and written notice of such service to Parent, shall

          be deemed, in every respect, effective service of process upon

          Parent.

                    (c)  Nothing in this Section 7.14 shall affect the

          right of any party to serve legal process in any other manner

          permitted by law or affect the right of any party to bring any

          action or proceeding against any other party or its property in

          the courts of other jurisdictions.


                                          67


<PAGE>


               IN WITNESS WHEREOF, the parties hereto have duly executed

          this Agreement.

          ATTEST:                           YPF SOCIEDAD ANONIMA


          By                                By                            
             ---------------------------       ---------------------------


                                            YPF ACQUISITION CORP.


          By                                By                            
             ---------------------------       ---------------------------


                                            MAXUS ENERGY CORPORATION


          By                                By                            
             ---------------------------       ---------------------------


                                          68


<PAGE>


                                                                  Exhibit A
                                                                  ---------


                               CONDITIONS TO THE OFFER
                               -----------------------


                    Notwithstanding any other provision of the Offer,

          Purchaser shall not be required to accept for payment, purchase

          or pay for any shares of Common Stock tendered pursuant to the

          Offer (the "Shares"), and may postpone the acceptance for

          payment, the purchase of, and/or payment for Shares, and/or may,

          subject to the terms of the Agreement, amend or terminate the

          Offer if (i) the Minimum Share Condition has not been satisfied,

          (ii) the Company shall not have taken the steps necessary to

          redeem the Rights, (iii) the applicable waiting period under the

          HSR Act shall not have expired or been terminated, (iv) the

          closing of the loans in connection with the Offer shall not have

          occurred under the Loan Agreement contemplated by the commitment

          letter, dated February 24, 1995, addressed to Parent from The

          Chase Manhattan Bank (National Association), a copy of which has

          heretofore been delivered to the Company, or (v) at any time at

          or before payment for any Shares (whether or not any Shares have

          theretofore been accepted for payment or paid for pursuant to the

          Offer), any of the following events shall have occurred and be

          continuing:

                         (a)  there shall be in effect any temporary

                    restraining order, preliminary or final injunction or

                    other order or decree issued by any United States

                    federal or state court of competent jurisdiction or 


<PAGE>


                    United States federal or state governmental, regulatory

                    or administrative agency or authority, (1) enjoining,

                    restraining or otherwise prohibiting the Offer, the

                    Merger or the acquisition by Parent or Purchaser of

                    shares of Common Stock; (2) prohibiting or materially

                    limiting the ownership or operation by Parent or

                    Purchaser of all or any substantial portion of the

                    business or material assets of the Company and its

                    subsidiaries, taken as a whole, or, as a consequence of

                    the Offer, Merger or Parent or Purchaser's acquisition

                    of shares of Common Stock, of Parent or any of its

                    subsidiaries, or compelling Parent or Purchaser to

                    dispose of or to hold separate all or any material

                    portion of the business or material assets of the

                    Company and its subsidiaries, taken as a whole, or of

                    Parent or any of its subsidiaries, or imposing any

                    material limitation on the ability of Parent or

                    Purchaser to conduct such business or own such assets,

                    (3) imposing material limitations on the ability of

                    Parent or Purchaser (or any other affiliate of Parent)

                    to acquire or hold or to exercise full rights of

                    ownership of the shares of Common Stock, including

                    without limitation the right to vote the shares of

                    Common Stock purchased by them on all matters properly

                    presented to the stockholders of the Company, or

                    (4) requiring material divestitures by Parent or

                    Purchaser or any of their subsidiaries or affiliates of


                                         -2-


<PAGE>


                    any Shares, as a consequence of the Offer, Merger or

                    Parent or Purchaser's acquisition of shares of Common

                    Stock; or 

                         (b)  there shall be any statute, rule, regulation

                    or order promulgated, enacted, entered or deemed

                    applicable to the Offer or the Merger, or any other

                    action shall have been taken, by any Governmental

                    Entity that is reasonably likely to result in any of

                    the consequences referred to in clauses (1) through (4)

                    of paragraph (a) above; or

                         (c)  there shall have occurred (1) any general

                    suspension of trading in, or limitation on prices for,

                    trading in securities on the New York Stock Exchange or

                    in the over-the-counter-market, (2) a declaration of a

                    banking moratorium or any limitation or suspension of

                    payments by United States authorities on the extension

                    of credit by United States lending institutions, (3) a

                    commencement of war, armed hostilities or other

                    international or national calamity directly or

                    indirectly involving the United States, or (4) in the

                    case of any of the foregoing existing at the time of

                    the commencement of the Offer, a material acceleration

                    or worsening thereof; or

                         (d)  it shall have been publicly disclosed or

                    Purchaser shall have learned that any Person shall have

                    entered into a definitive agreement or an agreement in

                    principle with the Company with respect to a tender 


                                         -3-


<PAGE>


                    offer or exchange offer for any shares of capital stock

                    of the Company (including without limitation the shares

                    of Common Stock) or a merger, consolidation or other

                    business combination or any acquisition or disposition

                    of a material amount of assets or any comparable event

                    with or involving the Company (other than such of the

                    foregoing as is permitted by the Agreement); or 

                         (e)  any of the representations and warranties of

                    the Company in the Agreement shall not have been, or

                    shall cease to be, true and correct in all material

                    respects (whether because of circumstances or events

                    occurring in whole or in part prior to, on or after the

                    date of the Agreement), or the Company shall have not

                    performed in all material respects the covenants to be

                    performed by it pursuant to the Agreement; or

                         (f)  the Agreement shall have been terminated by

                    the Company, on the one hand, or Parent and Purchaser,

                    on the other hand, in accordance with its terms or

                    Purchaser or Parent, on the one hand, and the Company,

                    on the other hand, shall have reached an agreement

                    providing for the termination of the Offer; or

                         (g)  the Company's Board of Directors shall have

                    failed to recommend and approve, or shall no longer

                    recommend and approve, the Offer or the adoption of the

                    Merger Agreement, or shall materially modify or amend

                    its recommendation and approval with respect thereto,

                    or shall have resolved to do any of the foregoing 


                                         -4-


<PAGE>


                    (except that the foregoing shall not apply to a

                    modification or amendment solely in the reasons for

                    such recommendation and approval so long as the Board

                    of Directors of the Company continues to recommend and

                    approve acceptance of the Offer and adoption of the

                    Merger Agreement by holders of Voting Stock); or

                         (h)  without limiting the generality or effect of

                    Paragraph (e) of this Section, except as disclosed to

                    Parent pursuant to the Agreement, there shall have been

                    any material adverse change in the business, financial

                    condition or results of operations of the Company and

                    its subsidiaries, taken as a whole;

          which, in the sole judgment of Purchaser, in any such case

          regardless of the circumstances (including any action or inaction

          by Purchaser or any of its affiliates other than a material

          breach by Purchaser or Parent of the Agreement) giving rise to

          any such condition, makes it inadvisable to proceed with the

          Offer or with such acceptance for payment or purchase of or

          payment for any of the Shares.

                    The foregoing conditions (i) may be asserted by

          Purchaser regardless of the circumstances (including any action

          or inaction by Purchaser or any of its affiliates other than a

          breach by Purchaser or Parent of the Agreement) giving rise to

          such condition and (ii) other than the Minimum Share Condition,

          are for the sole benefit of Purchaser and its affiliates.  The

          foregoing conditions, other than the Minimum Share Condition, may

          be waived by Purchaser in whole or in part at any time and from 


                                         -5-


<PAGE>


          time to time in its sole discretion.  The failure by Purchaser at

          any time to exercise any of the foregoing rights will not be

          deemed a waiver of any other rights and each such right will be

          deemed an ongoing right which may be asserted at any time and

          from time to time.


                                         -6-


<PAGE>


          I.  THE TENDER OFFER  . . . . . . . . . . . . . . . . . . . .   1
              ----------------

                    1.1.  The Offer . . . . . . . . . . . . . . . . . .   1
                          ---------

                    1.2.  Company Action  . . . . . . . . . . . . . . .   4
                          --------------

                    1.3.  Stockholder Lists . . . . . . . . . . . . . .   6
                          -----------------

                    1.4.  Board of Directors of the Company . . . . . .   6
                          ---------------------------------


          II.  THE MERGER . . . . . . . . . . . . . . . . . . . . . . .   8
               ----------

                              2.1.1.  Merger  . . . . . . . . . . . . .   8
                                      ------

                              2.1.2.  Effective Time  . . . . . . . . .   8
                                      --------------

                              2.1.3.  Effect of Merger  . . . . . . . .   9
                                      ----------------

                              2.1.4.  Conversion of Shares of Common
                                      ------------------------------

                         Stock  . . . . . . . . . . . . . . . . . . . .   9
                         -----

                    2.2.  Stockholders' Meeting of the Company  . . . .  11
                          ------------------------------------

                    2.3.  Consummation of the Merger  . . . . . . . . .  11
                          --------------------------

                    2.4.  Payment for Shares of Common Stock  . . . . .  12
                          ----------------------------------

                    2.5.  Closing of the Company's Transfer Books . . .  14
                          ---------------------------------------

                    2.6.  The Company Stock Options and Related
                          -------------------------------------

                    Matters . . . . . . . . . . . . . . . . . . . . . .  14
                    -------


          III.  REPRESENTATIONS AND WARRANTIES OF PARENT AND
                --------------------------------------------

               PURCHASER  . . . . . . . . . . . . . . . . . . . . . . .  15
               ---------

                    3.1.  Corporate Organization  . . . . . . . . . . .  15
                          ----------------------

                    3.2.  Authority . . . . . . . . . . . . . . . . . .  15
                          ---------

                    3.3.  Offer Documents . . . . . . . . . . . . . . .  16
                          ---------------

                    3.4.  Proxy Statement . . . . . . . . . . . . . . .  17
                          ---------------

                    3.5.  Fees  . . . . . . . . . . . . . . . . . . . .  17
                          ----


                                         -7-
<PAGE>


                    3.6.  Consents and Approvals; No Violation  . . . .  17
                          ------------------------------------

                    3.7.  Financing . . . . . . . . . . . . . . . . . .  19
                          ---------

                    3.8. Operations of the Company Following the
                         ---------------------------------------

                    Merger  . . . . . . . . . . . . . . . . . . . . . .  19
                    ------


          IV.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY  . . . . .  20
               ---------------------------------------------

                    4.1.  Corporate Organization  . . . . . . . . . . .  20
                          ----------------------

                    4.2.  Capitalization  . . . . . . . . . . . . . . .  21
                          --------------

                    4.3.  Authority . . . . . . . . . . . . . . . . . .  22
                          ---------

                    4.4.  Consents and Approvals; No Violation  . . . .  23
                          ------------------------------------

                    4.5.  Commission Filings  . . . . . . . . . . . . .  24
                          ------------------

                    4.6.  Absence of Certain Changes  . . . . . . . . .  25
                          --------------------------

                    4.7.  Litigation  . . . . . . . . . . . . . . . . .  26
                          ----------

                    4.8.  Compliance with Applicable Laws . . . . . . .  27
                          -------------------------------

                    4.9.  Fees  . . . . . . . . . . . . . . . . . . . .  28
                          ----

                    4.10.  Offer Documents  . . . . . . . . . . . . . .  28
                           ---------------

                    4.11.  Schedule 14D-9 . . . . . . . . . . . . . . .  28
                           --------------

                    4.12.  Proxy Statement  . . . . . . . . . . . . . .  29
                           ---------------

                    4.13.  Rights . . . . . . . . . . . . . . . . . . .  29
                           ------

                    4.14.  Certain Actions. . . . . . . . . . . . . . .  30
                           ---------------

                    4.15.  Subsidiaries . . . . . . . . . . . . . . . .  30
                           ------------

                    4.16.  No Default . . . . . . . . . . . . . . . . .  32
                           ----------

                    4.17.  Taxes  . . . . . . . . . . . . . . . . . . .  32
                           -----

                    4.18.  Insurance  . . . . . . . . . . . . . . . . .  35
                           ---------

                    4.19.  Benefit Plans  . . . . . . . . . . . . . . .  36
                           -------------

                    4.20.  Labor Matters  . . . . . . . . . . . . . . .  38
                           -------------

                    4.21.  Certain Environmental Matters  . . . . . . .  40
                           -----------------------------


                                         -8-
<PAGE>


          V.  COVENANTS . . . . . . . . . . . . . . . . . . . . . . . .  40
              ---------

                    5.1.  Acquisition Proposals . . . . . . . . . . . .  40
                          ---------------------

                    5.2.  Interim Operations  . . . . . . . . . . . . .  41
                          ------------------

                              5.2.1.  Conduct of Business . . . . . . .  41
                                      -------------------

                              5.2.2.  Certificate and By-Laws . . . . .  42
                                      -----------------------

                              5.2.3.  Capital Stock . . . . . . . . . .  42
                                      -------------

                              5.2.4.  Dividends . . . . . . . . . . . .  43
                                      ---------

                              5.2.5.  Debt  . . . . . . . . . . . . . .  43
                                      ----

                    5.3.  Employee Plans, Compensation, Etc.  . . . . .  44
                          ----------------------------------

                    5.4.  Access and Information  . . . . . . . . . . .  46
                          ----------------------

                    5.5.  Certain Filings, Consents and Arrangements  .  48
                          ------------------------------------------

                    5.6.  State Takeover Statutes . . . . . . . . . . .  48
                          -----------------------

                    5.7.  Proxy Statement . . . . . . . . . . . . . . .  48
                          ---------------

                    5.8.  Indemnification and Insurance . . . . . . . .  49
                          -----------------------------

                    5.9.  Additional Agreements . . . . . . . . . . . .  50
                          ---------------------

                    5.10.  Compliance with Antitrust Laws . . . . . . .  52
                           ------------------------------

                    5.11.  Publicity  . . . . . . . . . . . . . . . . .  52
                           ---------

                    5.12.  Notice of Actions and Proceedings  . . . . .  53
                           ---------------------------------

                    5.13.  Notification of Certain Other Matters  . . .  53
                           -------------------------------------

                    5.14.  Listing of Preferred Stock . . . . . . . . .  54
                           --------------------------

                    5.15.  Certain Obligations of Parent  . . . . . . .  54
                           -----------------------------


          VI.  CONDITIONS . . . . . . . . . . . . . . . . . . . . . . .  55
               ----------

                    6.1.  Conditions  . . . . . . . . . . . . . . . . .  55
                          ----------

                              6.1.1.  Stockholder Approval  . . . . . .  55
                                      --------------------

                              6.1.2.  Purchase of Shares of Voting
                                      ----------------------------

                         Stock  . . . . . . . . . . . . . . . . . . . .  55
                         -----


                                         -9-
<PAGE>


                              6.1.3.  Injunctions; Illegality . . . . .  55
                                      -----------------------

                              6.1.4.  HSR Act . . . . . . . . . . . . .  56
                                      -------

                    6.2.  Parent Obligations. . . . . . . . . . . . . .  56
                          ------------------


          VII.  MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . .  57
                -------------

                    7.1.  Termination . . . . . . . . . . . . . . . . .  57
                          -----------

                    7.2.  Non-Survival of Representations, Warranties
                          -------------------------------------------

                    and Agreements  . . . . . . . . . . . . . . . . . .  60
                    --------------

                    7.3.  Waiver and Amendment  . . . . . . . . . . . .  60
                          --------------------

                    7.4.  Entire Agreement  . . . . . . . . . . . . . .  61
                          ----------------

                    7.5.  Applicable Law  . . . . . . . . . . . . . . .  61
                          --------------

                    7.6.  Interpretation  . . . . . . . . . . . . . . .  61
                          --------------

                    7.7.  Notices . . . . . . . . . . . . . . . . . . .  61
                          -------

                    7.8.  Counterparts  . . . . . . . . . . . . . . . .  63
                          ------------

                    7.9.  Parties in Interest; Assignment . . . . . . .  63
                          -------------------------------

                    7.10.  Expenses; Termination Fee  . . . . . . . . .  64
                           -------------------------

                    7.11.  Obligation of Parent . . . . . . . . . . . .  64
                           --------------------

                    7.12.  Enforcement of the Agreement . . . . . . . .  64
                           ----------------------------

                    7.13.  Severability . . . . . . . . . . . . . . . .  65
                           ------------

               7.14.  Consent to Jurisdiction and Service of Process  .  65
                      ----------------------------------------------


                                         -10-





                                                                Exhibit (c)(2)


                                 GUARANTEE AGREEMENT


                    THIS GUARANTEE AGREEMENT, dated February 28, 1995, of
          YPF Sociedad Anonima, a corporation (sociedad anonima) organized
          and existing under the laws of the Republic of Argentina, with
          principal executive offices located at Avenida Pte. R. Saenz Pena
          777, 1364 Buenos Aires, Argentina (hereinafter called the
          "Guarantor"), in favor of The Prudential Insurance Company of
          America (hereinafter called "Prudential") and Prudential's
          successors and assigns who are the registered owners of shares of
          $9.75 Cumulative Convertible Preferred Stock (hereinafter called
          the "Shares") of Maxus Energy Corporation, a corporation
          organized and existing under the laws of the State of Delaware
          (hereinafter called the "Company") acquired in compliance with
          Section 3 of the 1995 Agreement hereinafter referred to
          (Prudential and all such successors and assigns being hereinafter
          sometimes collectively called the "Obligees").

                                       RECITALS

                    On February 1, 1987 Prudential and the Company entered
          into a Preferred Stock Purchase Agreement, dated February 1, 1987
          (hereinafter called the "Original Stock Purchase Agreement")
          providing for the issuance to Prudential of 3,000,000 of the
          Shares.  The Original Stock Purchase Agreement was subsequently
          amended by agreements between the Company and Prudential dated
          February 8, 1987 (hereinafter called the "First Amendment"), and
          April 12, 1990 (hereinafter called the "Existing Second Stock
          Purchase Agreement"), and pursuant to the Existing Second Stock
          Purchase Agreement (a) the Company reacquired from Prudential
          500,000 of the Shares, and (b) Prudential executed and delivered
          a Waiver of Certain Equity Offering Rights dated as of April 12,
          1990 and a Waiver of Certain Rights Relating to $9.75 Preferred
          Stock dated June 5, 1990 (hereinafter collectively called the
          "Waivers").  Prudential is currently the registered owner of all
          the outstanding Shares.

                    In contemplation of certain Transactions (as said term
          is defined in the 1995 Agreement hereinafter referred to),
          including a cash tender offer by a wholly-owned subsidiary of the
          Guarantor for shares of Common Stock of the Company (the "Tender
          Offer") as a result of which the Company would become a
          subsidiary of the Guarantor, the Company and Prudential are
          entering into an agreement (the "1995 Agreement"), making
          provision, among other things, with respect to (a) certain
          consents and waivers by Prudential in connection with the
          Transactions, (b) certain further amendments of the Original
          Stock Purchase Agreement, as previously amended, (c) certain
          amendments of the Existing Second Stock Purchase Agreement, (d)
          consent to certain amendments of, or, at the request of the
          Company, waivers with respect to, the Certificate of Designations
          relating to the Shares, and (e) the termination of the
          Registration Rights Agreement referred to in the Original Stock
          Purchase Agreement. The Original Stock Purchase Agreement, as
          amended as aforesaid (including by the 1995 Agreement), and as
          the same may be further amended in accordance with the provisions
          thereof and be in effect from time to time is hereinafter called
          the "Stock


<PAGE>


          Purchase Agreement"; the Existing Second Stock Purchase
          Agreement, as amended by the 1995 Agreement, and as the same may
          be further amended in accordance with the provisions thereof and
          be in effect from time to time is hereinafter called the "Second
          Stock Purchase Agreement"); and the Certificate of Designations
          with respect to the Shares, as certain provisions thereof have
          heretofore been waived and as amended as contemplated by the 1995
          Agreement, and as the same may be further amended in accordance
          with the terms thereof and be in effect from time to time, is
          hereinafter called the "Certificate of Designations").  

                    The 1995 Agreement provides that it is a condition to
          the effectiveness of the consent and waivers of Prudential with
          respect to the Transactions, and of the amendments of the
          Original Stock Purchase Agreement and the Existing Stock Purchase
          Agreement, and of the consent of Prudential to the amendments of,
          or, at the request of the Company, waivers with respect to, the
          Certificate of Designations, and of the termination of the
          Registration Rights Agreement, therein provided for, that the
          Guarantor execute and deliver to Prudential a guarantee agreement
          substantially in the form hereof, and the Guarantor is willing to
          give its guarantee of the Obligations (as hereinbelow defined) on
          the terms and conditions hereinbelow set forth.

                    NOW, THEREFORE, this Agreement 

                                 W I T N E S S E T H:

                    For and in consideration of the execution and delivery
          by Prudential of the 1995 Agreement, and the taking by Prudential
          of the actions specified therein to be taken by it, the Guarantor
          does hereby covenant and agree, for the benefit of Prudential and
          each of the other Obligees from time to time, as follows:

                    1.   Guarantee.  The Guarantor unconditionally and
                         ---------
          irrevocably guarantees to each Obligee the due and punctual
          payment and performance of each and every obligation of the
          Company to such Obligee (hereinafter collectively called the
          "Obligations") under (a) the Stock Purchase Agreement, (b) the
          Second Stock Purchase Agreement, and (c) the Certificate of
          Designations (the instruments referred to in the foregoing
          clauses (a), (b) and (c) being sometimes hereinafter called the
          "Guaranteed Instruments"), in each case (as to monetary
          Obligations) when and as the same shall become due and payable
          (without regard, in the case of dividend and redemption payments
          on the Shares, to whether the Company shall have funds legally
          available therefor, the Board of Directors of the Company shall
          have taken any action with respect thereto, or the Company shall
          otherwise be under any legal disability in respect of making such
          payments), or (as to non-monetary Obligations) when performance
          thereof shall be due, in accordance with the terms of the Stock
          Purchase Agreement, the Second Stock Purchase Agreement or the
          Certificate of Designations, as the case may be.  In the case of
          the failure of the Company punctually to make any such payment or
          to render any such performance, the Guarantor hereby
          unconditionally agrees to cause any such payment to be made or
          performance to be rendered, as the case may be, punctually when
          and as the same shall become due, all as if such payment or
          performance were made or rendered by the Company.

                    2.   Certain Waivers; Unconditionality.  The Guarantor
                         ---------------------------------
          waives (to the extent permitted by applicable law) notice of
          acceptance of the guaranties set forth herein, of any


                                          2


<PAGE>


          action taken or omitted in reliance hereon or of any default in
          the payment or in the performance of any Obligations guaranteed
          hereby.

                    The Guarantor hereby agrees that its obligations under
          this Agreement (in respect of monetary Obligations) constitute a
          present and continuing guarantee of payment and not of
          collectibility, and that its obligations hereunder with respect
          to payment and performance of the Obligations shall be absolute
          and unconditional, and to the extent permitted by applicable law,
          shall not be subject to any counterclaim, setoff, deduction or
          defense based upon any claim the Guarantor may have against the
          Company, any Obligee or any other person, and shall remain in
          full force and effect without regard to, and shall not be
          released, discharged or in any way affected or impaired by any
          thing, event, happening, matter, circumstance or condition
          whatsoever (whether or not the Guarantor shall have any knowledge
          or notice thereof or consent thereto), including, without
          limitation: (a) any amendment or modification of or supplement to
          any provision of this Agreement or any of the Guaranteed
          Instruments, or any assignment or transfer thereof or of any
          Shares to another Obligee, including, without limitation, any
          renewal or extension of the terms of payment of any monetary
          Obligation or the granting of time in respect of any payment
          thereof, or any furnishing or acceptance of security or any
          release of any security so furnished or accepted for any such
          Obligation; (b) any waiver, consent, extension, granting of time,
          forbearance, indulgence or other action or inaction under or in
          respect of this Agreement or any of the Guaranteed Instruments,
          or any exercise or nonexercise of any right, remedy or power in
          respect hereof or thereof; (c) any bankruptcy, insolvency,
          reorganization, arrangement, readjustment, composition,
          liquidation or similar proceedings with respect to the Company,
          or any other person, or the properties or creditors of any of
          them; (d) any invalidity or any unenforceability of, or any
          misrepresentation, irregularity or other defect in, this
          Agreement or any of the Guaranteed Instruments or any other
          agreement; (e) any transfer of any assets to or from the Company,
          including, without limitation, any transfer or purported transfer
          to the Company from any person, any invalidity, illegality of, or
          inability to enforce, any such transfer or purported transfer,
          any consolidation or merger of the Company with or into any other
          corporation or entity, or any change whatsoever in the objects,
          capital structure, constitution or business of the Company; (f)
          any failure on the part of the Company or any other person to
          perform or comply with any term of any of the Guaranteed
          Instruments, this Agreement or any other agreement; (g) any suit
          or other action brought by any stockholders or creditors of, or
          by, the Guarantor or the Company or any other person for any
          reason whatsoever, including, without limitation, any suit or
          action in any way attacking or involving any issue, manner or
          thing in respect of this Agreement, any of the Guaranteed
          Instruments or any other agreement; (h) any lack or limitation of
          status or of power, incapacity or disability of the Guarantor,
          the Company or of any director or agent of either of them; (i)
          there not being funds legally available to the Company on any
          Quarterly Dividend Payment Date (as defined in the Certificate of
          Designations) for the payment on such date of a dividend on the
          Shares, or on any February 1 for the making on such date of any
          redemption payment in respect of the Shares as required by
          Section 5(b) of the Certificate of Designations; (j) the Board of
          Directors of the Company not having taken any action with respect
          thereto; or (k) any other thing, event, happening, matter,
          circumstance or condition whatsoever, not in any way limited to
          the foregoing.

                    3.   Subrogation; Limitations Thereon.  The Guarantor
                         --------------------------------
          hereby agrees that if it shall make any payment or render any
          performance in respect of any Obligation, it shall,


                                          3


<PAGE>


          to the extent permitted by applicable law, be subrogated to the
          rights of the Obligee to which such payment was made or
          performance rendered; provided, however, that such rights of
                                --------  -------
          subrogation and all indebtedness and claims arising therefrom
          shall be, and the Guarantor agrees that it is, and shall at all
          times be, in all respects subordinate and junior to the prior
          payment in full, in cash, of all monetary Obligations which shall
          have become due in respect of which payment was not made and the
          prior performance in full of all non-monetary Obligations which
          shall have become due in respect of which performance not
          rendered.  The Guarantor agrees that the foregoing right of
          subrogation shall not be effective until, and that it shall not
          be entitled to receive any payment, under any condition, in
          respect of any such subrogated claim unless and until, all
          Obligations the payment or performance of which shall have become
          due shall have been paid in full in cash or funds for their
          payment shall have been duly and sufficiently provided, or such
          performance shall have been duly and fully rendered, as the case
          may be.

                    4.   Further Waivers; Reinstatement; Expenses.  The
                         ----------------------------------------
          Guarantor waives any right it may have to require any Obligee to
          proceed against the Company or against any other party prior to
          making any claim under this Agreement.  The Guarantor agrees that
          its guaranties herein contained shall be automatically reinstated
          if and to the extent that for any reason any payment by or on
          behalf of the Company or the Guarantor is rescinded or must be
          otherwise restored by any Obligee, whether as a result of any
          proceedings in bankruptcy or reorganization or otherwise.

                    Without limiting the generality of the foregoing, if
          the Obligees are prevented by applicable law from exercising
          remedies otherwise available to them in respect of any Guaranteed
          Instrument, to the fullest extent permitted by applicable law the
          Obligees shall be entitled to receive hereunder from the
          Guarantor, upon demand therefor, the payment or performance which
          would have otherwise been due had such remedies been exercised.

                    The Guarantor shall pay each Obligee such further
          amounts as shall be sufficient to cover the reasonable costs and
          expenses of collecting any sums due under this Agreement or any
          of the Guaranteed Instruments, or of otherwise enforcing the
          same, including, in any case, reasonable compensation to its
          attorneys for all services rendered in that connection.

                    5.   Representations and Warranties.  The Guarantor
                         ------------------------------
          represents and warrants that (a) it is a sociedad anonima
          (corporation) duly existing and incorporated in the City of
          Buenos Aires, Argentina, with a term of duration expiring on June
          15, 2093, and registered with the Public Registry of Commerce on
          June 15, 1993 under number 5109, Book 13, Volume A of Local By-
          Laws; (b) it has all requisite corporate power to execute,
          deliver and perform its obligations under this Agreement and,
          when executed and delivered, this Agreement will constitute its
          valid and binding obligation under the laws of Argentina, to the
          extent applicable hereto, enforceable in accordance with its
          terms , except as limited by applicable bankruptcy, insolvency,
          reorganization, moratorium, and other similar laws affecting the
          rights of creditors generally; and (c) such execution, delivery
          and performance do not require any consent or approval of any
          governmental authority of or in Argentina, except such as has
          been obtained and is valid and sufficient for its purpose, and do
          not constitute a breach or violation of, or a default under, any
          provision of (i) its organic documents, (ii) any law, rule,
          regulation or decree, or any order, writ or judgment, of any 


                                          4


<PAGE>


          court or governmental authority of or in Argentina binding upon
          it, or to which it is subject, or (iii) any agreement, or other
          instrument to which it is a party, or to which it or its
          properties are subject.

                    6.   Consent to Jurisdiction and Service of Process. 
                         ----------------------------------------------
          (a) The Guarantor consents to the non-exclusive jurisdiction of
          any court of the State of New York or any United States federal
          court sitting in the Borough of Manhattan, New York City, New
          York, United States, and any appellate court from any thereof,
          and waives any immunity from the jurisdiction of such courts over
          any suit, action or proceeding that may be brought in connection
          with this Agreement. The Guarantor irrevocably waives, to the
          fullest extent permitted by law, any objection to any suit,
          action, or proceeding that may be brought in connection with this
          Agreement in such courts whether on the grounds of venue,
          residence or domicile or on the ground that any such suit, action
          or proceeding has been brought in an inconvenient forum.  The
          Guarantor agrees that final judgment in any such suit, action or
          proceeding brought in such court shall be conclusive and binding
          upon the Guarantor and may be enforced in any court to the
          jurisdiction of which the Guarantor is subject by suit upon such
          judgment; provided that service of process is effected upon the
                    --------
          Guarantor in the manner provided in this Agreement. 
          Notwithstanding the foregoing, any suit, action or proceeding
          brought in connection with this Agreement may be instituted in
          any competent court in Argentina.

                         (b)  The Guarantor agrees that service of all
          writs, process and summonses in any suit, action or proceeding
          brought in connection with this Agreement against the Guarantor
          in any court sitting in the Borough of Manhattan, New York City
          may be made upon CT Corporation System at 1633 Broadway, New
          York, New York 10019, whom the Guarantor irrevocably appoints as
          its authorized agent for service of process.  The Guarantor
          represents and warrants that CT Corporation System has agreed to
          act as the Guarantor's agent for service of process.  The
          Guarantor agrees that such appointment shall be irrevocable so
          long as this Agreement shall remain in effect or until the
          irrevocable appointment by the Guarantor of a successor in The
          City of New York as its authorized agent for such purpose and the
          acceptance of such appointment by such successor.  The Guarantor
          further agrees to take any and all action, including the filing
          of any and all documents and instruments, that may be necessary
          to continue such appointment in full force and effect as
          aforesaid.  If CT Corporation System shall cease to be the
          Guarantor's agent for service of process, the Guarantor shall
          appoint without delay another such agent and provide prompt
          written notice to the Obligees, to the extent known to it, of
          such appointment.  With respect to any such action in any court
          of the State of New York or any United States federal court in
          the Borough of Manhattan, New York City, service of process upon
          CT Corporation System, as the authorized agent of the Guarantor
          for service of process, and written notice of such service to the
          Guarantor, shall be deemed, in every respect, effective service
          of process upon the Guarantor.

                         (c)  Nothing in this paragraph 6 shall affect the
          right of any party to serve legal process in any other manner
          permitted by law or affect the right of any party to bring any
          action or proceeding against any other party or its property in
          the courts of other jurisdictions.


                                          5


<PAGE>


                    7.   Payments of Additional Amounts.  All payments in
                         ------------------------------
          respect of this Agreement, including, without limitation,
          payments of dividend amounts and redemption amounts, shall be
          made by the Guarantor without withholding or deduction for or on
          account of any present or future taxes, duties, levies, or other
          governmental charges of whatever nature in effect on the date of
          this Agreement or imposed or established in the future by or on
          behalf of Argentina or any authority in Argentina.  In the event
          any such taxes or liabilities are so imposed or established, the
          Guarantor shall pay such additional amounts as may be necessary
          in order that the net amounts receivable by the Obligees after
          any withholding or deduction in respect of such tax or liability
          shall equal the amounts that would have been receivable in
          respect of this Agreement in the absence of such withholding or
          deduction; except that no such additional amounts will be payable
          with respect to any withholding or deduction on any security to,
          or to a third party on behalf of, an Obligee for or on account of
          any such taxes or liabilities that have been imposed by reason of
          the Obligee being a resident of Argentina or having some
          connection with Argentina other than the mere holding of the
          Shares or the receipt of dividend payments in respect thereof. 
          Furthermore, no additional amounts shall be paid with respect to
          any payment under this Agreement to an Obligee that is a
          fiduciary or partnership or other than the sole beneficial owner
          of such payment to the extent that a beneficiary or settlor with
          respect to such fiduciary or a member of such partnership or
          beneficial owner would not have been entitled to receive the
          additional amounts had such beneficiary, settlor, member or
          beneficial owner been the Obligee.

                    8.   Governing Law.  This Agreement is being delivered
                         -------------
          and is intended to be performed in the State of New York, and
          shall be construed and enforced in accordance with, and the
          rights of the parties shall be governed by, the law of such
          State.

                    9.   Effectiveness.  This Agreement shall take effect
                         -------------
          upon (and concurrently with) the merger into the Company of the
          wholly-owned subsidiary of the Guarantor which shall have
          acquired shares of the Common Stock of the Company in the Tender
          Offer.

                    10.  Survival of Representations and Warranties.  All
                         ------------------------------------------
          representations and warranties contained herein or made in
          writing by the Guarantor or Prudential in connection herewith
          shall survive the execution and delivery of this Agreement and
          any disposition of the Shares.

                    11.  Successors and Assigns.  All covenants and
                         ----------------------
          agreements in this Agreement contained shall bind and inure to
          the benefit of (a) the Guarantor and its successors and assigns
          and (b) the Obligees.  This Agreement shall not be assignable, in
          whole or in part by any Obligee, except to another Obligee,
          without the prior written consent of the Guarantor.

                    12.  Notices.  All communications provided for
                         -------
          hereunder shall be sent by first class mail and (a) if to
          Prudential, addressed to it in care of Prudential Capital Group,
          1201 Elm Street, Suite 4900, Dallas, Texas 75270, Attention:
          Managing Director, or to such other address as it may have
          designated to the Guarantor and the Company in writing, (b) if to
          any other Obligee, addressed to such Obligee at the address of
          such Obligee in the stock record books of the Company, (c) if to
          the Guarantor, at its address set forth in the prefatory
          paragraph of this Agreement, Attention: President, or to such
          other address as it shall have designated to the Obligees in
          writing, and (d) if to the Company, addressed to it at: 717 North
          Harwood Street, Dallas, Texas 75201, Attention: Secretary, or to
          such other address or


                                          6


<PAGE>


          addresses as the Company may have designated in writing to you
          and each other holder of any of the Shares at the time
          outstanding.

                    13.  Descriptive Headings.  The descriptive headings of
                         --------------------
          the several paragraphs of this Agreement are inserted for
          convenience only and do not constitute a part of this Agreement.

                    14.  Acknowledgment; Counterparts.  By its execution of
                         ----------------------------
          the acknowledgment set forth at the foot hereof Prudential
          acknowledges the execution and delivery to it of this Agreement
          as provided in the 1995 Agreement, and confirms the effectiveness
          of all consents and waivers contained in such agreement
          effectiveness of which is conditioned upon such execution and
          delivery.  This Agreement and the acknowledgment hereof may be
          executed in two or more counterparts, each of which shall be
          deemed an original, and it shall not be necessary in making proof
          of this Agreement to produce or account for more than one such
          counterpart.

                    IN WITNESS WHEREOF, the Guarantor has caused this
          Agreement to be executed by its officer thereunto duly
          authorized, all as of the day and year first above written.


                                             YPF SOCIEDAD ANONIMA


                                             By:                           
                                                 --------------------------
                                                 Name:
                                                 Title:

          Execution and delivery hereof
          by the Guarantor acknowledged, 
          and effectiveness of certain provisions 
          of the 1995 Agreement confirmed, 
          as set forth in Section 14 above, 
          as of the day and year first above written:

          THE PRUDENTIAL INSURANCE 
            COMPANY OF AMERICA


          By                           
              ------------------------
              Name:
              Title:


                                          7





                                                                Exhibit (c)(3)


                               MAXUS ENERGY CORPORATION
                               717 North Harwood Street
                                 Dallas, Texas 75201


                                              February 28, 1995

          The Prudential Insurance Company 
             of America
          Three Gateway Center
          100 Mulberry Street
          Newark, New Jersey 07102

          Gentlemen:

                    On February 1, 1987, the undersigned, MAXUS ENERGY
          CORPORATION (the "Company"), a Delaware corporation, and you
          entered into a Preferred Stock Purchase Agreement, dated February
          1, 1987 (the "Original Stock Purchase Agreement"), providing for
          the issuance to you of 3,000,000 shares of $9.75 Cumulative
          Convertible Preferred Stock of the Company (the "Shares").  The
          Original Stock Purchase Agreement was subsequently amended by
          agreements between the undersigned and you dated February 8, 1987
          (the "First Amendment"), and April 12, 1990 (the "Second Stock
          Purchase Agreement"), and pursuant to the Second Stock Purchase
          Agreement (a) the Company reacquired from you 500,000 of the
          Shares, and (b) you executed and delivered a Waiver of Certain
          Equity Offering Rights dated as of April 12, 1990 and a Waiver of
          Certain Rights Relating to $9.75 Preferred Stock dated June 5,
          1990 (collectively the "Waivers"), relating to certain provisions
          of the Certificate of Designations, the Registration Rights
          Agreement and the Company's Preferred Stock Purchase Rights Plan. 
          The Original Stock Purchase Agreement, as amended as aforesaid,
          is herein called the "Stock Purchase Agreement," and except as
          otherwise expressly provided herein, all capitalized terms used
          herein and defined in the Stock Purchase Agreement or the Second
          Stock Purchase Agreement, as the case may be, are used herein as
          so defined.

                    The undersigned has advised you that it contemplates
          entering into the Transactions, including a cash tender offer by
          a wholly-owned subsidiary of Gaucho for shares of the Common
          Stock of the Company (the "Tender Offer"), as a result of which
          the Company would become a subsidiary of Gaucho, and in
          connection therewith has obtained the agreement of Gaucho,
          effective upon the merger into the Company of such wholly-owned
          subsidiary of Gaucho, to guarantee the Company's obligations
          under the Certificate of Designations, the Stock Purchase
          Agreement and the Second Stock Purchase Agreement (each as
          heretofore and hereby amended or to be amended or certain
          provisions thereof heretofore and hereby waived or to be waived,
          as the case may be), such guarantee to be substantially in the
          form annexed hereto as Exhibit A (the "Gaucho Guarantee").  In
          consideration of the execution and delivery to you of the Gaucho
          Guarantee, you have agreed to consent to the Transactions and
          waive all provisions of applicable agreements and other
          instruments necessary in connection therewith, effective upon the
          execution and delivery of


<PAGE>


          this Agreement and the execution and delivery to you of the
          Gaucho Guarantee, and to further amendments of or, with respect
          to the Certificate of Designations, amendments or permanent
          waivers of (and, in anticipation of the effectiveness of such
          amendments and/or permanent waivers, temporary waivers of certain
          provisions of) the Stock Purchase Agreement, the Second Stock
          Purchase Agreement and the Certificate of Designations, a waiver
          of certain rights under the Company's Preferred Stock Purchase
          Rights Plan, and termination of the Registration Rights
          Agreement, such amendments and/or permanent waivers and
          termination to become effective upon the merger into the Company
          of the wholly-owned subsidiary of Gaucho, and such temporary
          waivers to become effective immediately, all as more fully
          hereinafter set forth.

                    NOW, THEREFORE, in consideration of the foregoing, and
          of the mutual covenants and agreements herein contained, the
          Company and you agree as follows:

                    1.   Consent to Transactions.  Notwithstanding any
                         -----------------------
          provisions of the Certificate of Designations, the Stock Purchase
          Agreement, the Second Stock Purchase Agreement, the Registration
          Rights Agreement, or of any other agreement or instrument which
          would prohibit, restrict, impose conditions upon, or otherwise
          adversely affect, the Company's consummation of all or any
          portion of the Transactions, or pursuant to which you do or may
          have the right to consent to or impose conditions upon the
          Company's consummation of all or any portion of the Transactions,
          you do hereby unconditionally and irrevocably waive your rights
          under any such provisions (including, without limitation, Section
          3(b) of the Certificate of Designations) and any appraisal rights
          in connection with the Transactions, and grant your unqualified,
          unconditional and irrevocable consent to the Company's
          consummation of the Transactions, such waiver and consent to
          become and be effective upon execution and delivery of this
          Agreement and the execution and delivery to you of the Gaucho
          Guarantee.

                    2.   Amendments, etc.
                         ---------------

                    2A.  Amendments of Stock Purchase Agreement.  You and
                         --------------------------------------
          the Company agree that, effective upon the effectiveness of the
          Gaucho Guarantee, the Stock Purchase Agreement shall be amended
          to delete therefrom paragraphs 5F, 5H, 7A, 7B, 7C and 7D thereof.

                    2B.  Amendments of Second Stock Purchase Agreement. 
                         ---------------------------------------------
          You and the Company agree that, effective upon the effectiveness
          of the Gaucho Guarantee, the Second Stock Purchase Agreement
          shall be amended

                         (a)  to delete therefrom paragraphs 5A, 5B, 5C(b),
                    5D(a) and 5D(b) thereof; and

                         (b)  to delete therefrom paragraphs 7A, 7B and 7C
                    thereof.

                    2C.  Amendment or Waiver of Certificate of
                         -------------------------------------
          Designations; Certain Waivers.  Without limitation of paragraph
          -----------------------------
          1, Prudential and the Company hereby agree effective upon the
          effectiveness of the Gaucho Guarantee, to the amendment of the
          Certificate of Designations with respect to all outstanding
          Shares to delete therefrom Section 2(b), Section


                                          2


<PAGE>


          3(b), Section 5(a) , Section 5(c), Section 8 and Section 9
          thereof, and all defined terms, if any, used only in one or more
          of such deleted Sections, and to effect any other modifications
          thereof (including but not limited to deletion of cross-
          references to deleted provisions) necessary or appropriate to
          give effect to the aforementioned amendments.  Alternatively, in
          lieu of such amendments, if the Company shall so request, you and
          the Company shall execute and deliver unconditional, irrevocable
          and permanent waivers (i) in the case of such waivers to be
          executed and delivered by you, of any and all rights of the
          holders of Shares under Section 2(b), Section 3(b), Section 8 and
          Section 9 of the Certificate of Designations, (ii) in the case of
          such waivers to be executed and delivered by the Company, of any
          and all rights of the Company under Section 5(a) and Section 5(c)
          of the Certificate of Designations, and (iii) in the case of such
          waivers to be executed and delivered by you and the Company, of
          any other provisions of the Certificate of Designations necessary
          to give effect to the intent of the foregoing waivers, all such
          waivers specified in clauses (i), (ii) and (iii) of this sentence
          to be effective upon the effectiveness of the Gaucho Guarantee. 
          In furtherance thereof, effective upon the execution and delivery
          hereof and execution and delivery to you of the Gaucho Guarantee,
          you agree that until such amendment of, or permanent waivers with
          respect to, the Certificate of Designations shall become
          effective (but subject to the following proviso) you will take no
          action to exercise, and do hereby unconditionally and irrevocably
          waive, any right to receive increased dividends pursuant to said
          Section 2(b), or to convert any Shares into Common Stock of the
          Company pursuant to said Section 8; and (subject to the following
          proviso) without limitation as to time you unconditionally and
          irrevocably waive any rights attributable to the Convertible
          Shares you would otherwise have with respect to Rights granted
          under the Company's Preferred Stock Purchase Rights Plan,
          including the right to receive any redemption payment with
          respect thereto (you having previously and effectively waived
          such rights with respect to the Conversion Waiver Shares under
          date of June 5, 1990); provided, however, that the waivers in
          this sentence shall become null and void and of no force or
          effect, ab initio and as if the same had never been granted, if
          the Transactions shall not have been consummated and said
          amendment of, or waivers with respect to, the Certificate of
          Designations shall not have become effective, on or before June
          30, 1995.

                    2D.  Termination of Registration Rights Agreement.  You
                         --------------------------------------------
          and the Company agree that, effective upon the effectiveness of
          the Gaucho Guarantee, the Registration Rights Agreement shall be
          terminated and be of no further force or effect, and agree that,
          effective upon the execution and delivery hereof and until such
          termination shall become effective (but subject to the following
          proviso), you will take no action to exercise, and do hereby
          unconditionally and irrevocably waive, any right to obtain
          registration of any Registrable Securities (as defined in the
          Registration Rights Agreement) pursuant thereto; provided,
          however, that the waiver in this paragraph 2D shall become null
          and void and of no force or effect, ab initio and as if the same
          had never been granted, if the Transactions shall not have been
          consummated and such termination shall not have become effective,
          on or before June 30, 1995. 

                    3.   Representations and Agreements of the Holder.  You
                         --------------------------------------------
          represent and warrant that this Agreement has been duly
          authorized, executed and delivered by you, the performance hereof
          is within your corporate powers and this Agreement constitutes
          your valid and binding obligation, enforceable in accordance with
          its terms.


                                          3


<PAGE>


                    You hereby agree that if you shall sell, transfer or
          otherwise dispose of any Shares, any transferee, as a condition
          of the transfer shall, by written agreement satisfactory to the
          Company and its counsel delivered to the Company at least five
          business days prior to the proposed effective date of such
          transfer, expressly assume all of your obligations, waivers,
          duties and covenants under the Stock Purchase Agreement, the
          Second Stock Purchase Agreement and this Agreement (as each may
          have been amended or modified, or any provisions thereof waived,
          and shall at such time be in effect), including without
          limitation your obligations under this paragraph 3, as to the
          Shares to be so transferred.

                    Concurrently with the execution and delivery hereof,
          the certificates currently evidencing the Conversion Waiver
          Shares and the Convertible Shares are being surrendered against
          delivery to you of one or more certificates evidencing a like
          aggregate number of Shares which shall not contain the legends
          provided for in paragraph 7A of the Second Stock Purchase
          Agreement but which, in addition to any other legend placed upon
          such certificate(s), shall bear a legend to the following effect:

                    "The securities represented by this certificate are
                    subject to certain provisions of an agreement, dated
                    April 12, 1990, and the provisions of an agreement,
                    dated February 28, 1995, each between the Corporation
                    and The Prudential Insurance Company of America, the
                    terms of which require the holder hereof to execute
                    certain unconditional and irrevocable waivers of
                    certain rights of the holder, including without
                    limitation the right to convert these securities into
                    Common Stock of the Corporation, to receive increased
                    dividends in certain circumstances and to vote in
                    respect of certain matters, and, under certain
                    circumstances, to consent to amendments of, or, at the
                    request of the Company, waivers with respect to, the
                    Certificate of Designations and amendments of certain
                    agreements to which the Corporation is a party.  Copies
                    of such agreements are on file at the principal
                    executive offices of the Corporation."

          If the Gaucho Guarantee, and the amendments and waivers of
          various instruments provided in paragraphs 2A, 2B and 2C hereof,
          shall not have become effective, on or before June 30, 1995, on
          the next succeeding business day the Company shall deliver to
          you, against delivery to it of the certificates evidencing the
          Shares issued as provided hereinabove in this paragraph 3,
          replacement certificates for a like aggregate number of Shares
          bearing the legends required by the Second Stock Purchase
          Agreement (disregarding the amendments thereof provided in said
          paragraph 2B hereof).  You represent and warrant that you are as
          of the date hereof the sole record and beneficial owner of
          1,250,000 Shares (of which 375,000 Shares are Conversion Waiver
          Shares and 875,000 Shares are Convertible Shares).

                    4.   Effect of Amendments.  If any provision of the
                         --------------------
          Waivers shall be inconsistent with any provision hereof, or of
          the Stock Purchase Agreement or the Second Stock Purchase
          Agreement as amended hereby, the provisions of this Agreement, or
          the Stock Purchase Agreement or the Second Stock Purchase
          Agreement (as so amended), as the case may be, shall govern.  As
          amended hereby, the Stock Purchase Agreement and the Second Stock
          Purchase Agreement, and (subject to the preceding sentence) the
          Waivers, shall be and remain in full force and effect.


                                          4


<PAGE>


                    5.   Definitions.  In addition to the definitions
                         -----------
          contained and referred to in the preamble of this Agreement, for
          the purpose of this Agreement the following terms shall have the
          meanings specified with respect thereto below:

                    "Gaucho" shall mean YPF Sociedad Anonima, a corporation
                     ------
                    (sociedad anonima) organized and existing under the
                    laws of the Republic of Argentina. 

                    "Transactions" shall mean and include a tender offer
                     ------------
                    for the Company's Common Stock as a result of which, if
                    successful, the Company will become a subsidiary of
                    Gaucho, the subsequent merger of Gaucho's wholly-owned
                    subsidiary that is the holder of a majority of the
                    outstanding shares of common stock of the Company into
                    the Company, and the incurrence of not in excess of
                    $600,000,000 aggregate principal amount of indebtedness
                    by the Company and/or its subsidiaries, a portion of
                    which may be secured by liens upon the Common Stock of
                    the Company acquired in such tender offer and/or upon
                    assets of the Company's and/or its subsidiaries, and
                    certain related transactions (including the repayment
                    and making of loans and advances, and/or payment of
                    dividends) among the Company and its subsidiaries.

                    6.   Miscellaneous.
                         -------------

                    6A.  Restructuring Fee.  The Company agrees to pay you
                         -----------------
          a restructuring fee of $250,000 upon the effectiveness of the
          Gaucho Guarantee.  The obligation of the Company under this
          paragraph 6A shall survive the transfer or redemption of any
          Shares.

                    6B.  Consent to Amendments.  This Agreement may be
                         ---------------------
          amended with the consent of the Company and the Company may take
          any action herein prohibited, or omit to perform any act herein
          required to be performed by it, only if the Company shall have
          obtained the written consent to such amendment, action or
          omission to act of the holder or holders of not less than 66-2/3%
          of the Shares at the time outstanding and each holder of the
          Shares at the time or thereafter outstanding shall be bound by
          any consent authorized by this paragraph 6B.  The Company shall
          promptly send copies of any amendment, consent or waiver (and any
          request for any such amendment, consent or waiver) relating to
          this Agreement to you and each other Institutional Holder then
          holding any of the Shares and, to the extent practicable, shall
          consult with you and each other Institutional Holder then holding
          any of the Shares in connection with each such amendment, consent
          and waiver.  No course of dealing between the Company and the
          holder of any Shares nor any delay in exercising any rights
          hereunder shall operate as a waiver of any rights of any holder
          of such Shares.

                    6C.  Survival of Representations and Warranties.  All
                         ------------------------------------------
          representations and warranties contained herein or made in
          writing by the Company or you in connection herewith shall
          survive the execution and delivery of this Agreement and any
          disposition of the Shares.

                    6D.  Successors and Assigns. All covenants and
                         ----------------------
          agreements in this Agreement contained by or on behalf of either
          of the parties hereto shall bind and inure to the benefit of the
          Company and its successors and assigns and you and your
          successors and assigns to the


                                          5


<PAGE>


          extent they are the registered owners of Shares acquired in
          compliance with Section 3 of this Agreement.

                    6E.  Notices.  All communications provided for
                         -------
          hereunder shall be sent by first class mail and (a) if to you,
          addressed to you at the address set forth by you for such
          communications on Schedule I hereto, or to such other address as
          you may have designated to the Company in writing, (b) if to any
          other holder of Shares, addressed to such holder at the address
          of such holder in the stock record books of the Company, and (c)
          if to the Company, addressed to it at: 717 North Harwood Street,
          Dallas, Texas 75201, Attention: Secretary, or to such other
                               ---------
          address or addresses as the Company may have designated in
          writing to you and each other holder of any of the Shares at the
          time outstanding.

                    6F.  Descriptive Headings.  The descriptive headings of
                         --------------------
          the several paragraphs of this Agreement are inserted for
          convenience only and do not constitute a part of this Agreement.

                    6G.  Governing Law.  This Agreement is being delivered
                         -------------
          and is intended to be performed in the State of Delaware, and
          shall be construed and enforced in accordance with, and the
          rights of the parties shall be governed by, the law of such
          state.

                    6H.  Counterparts.  This Agreement may be executed in
                         ------------
          two or more counterparts, each of which shall be deemed an
          original, and it shall not be necessary in making proof of this
          Agreement to produce or account for more than one such
          counterpart.

                    If you are in agreement with the foregoing, please sign
          the form of acceptance on the enclosed counterpart of this letter
          and return the same to the undersigned, whereupon this letter
          shall become a binding agreement between you and the undersigned.


                                             Very truly yours,

                                             MAXUS ENERGY CORPORATION


                                             By:                           
                                                ---------------------------
                                                 Title:


          The foregoing Agreement is 
          hereby accepted as of the date 
          first above written:

          THE PRUDENTIAL INSURANCE
            COMPANY OF AMERICA 


                                          6


<PAGE>


          By:                         
               ------------------------
               Name:
               Title:


                                          7




                                                                Exhibit (c)(4)


                             AGREEMENT REGARDING EXPENSES

                    THIS AGREEMENT, dated February 28, 1995, of YPF
          Sociedad Anonima, a corporation (sociedad anonima) organized and
          existing under the laws of the Republic of Argentina, with
          principal executive offices located at Avenida Pte. R. Saenz Pena
          777, 1364 Buenos Aires, Argentina (hereinafter called "YPF"), in
          favor of The Prudential Insurance Company of America (hereinafter
          called "Prudential") and Prudential's successors and assigns who
          are the registered owners of shares of $9.75 Cumulative
          Convertible Preferred Stock (hereinafter called the "Shares") of
          Maxus Energy Corporation, a corporation organized and existing
          under the laws of the State of Delaware (hereinafter called the
          "Company") acquired in compliance with Section 3 of the 1995
          Agreement hereinafter referred to (Prudential and all such
          successors and assigns being hereinafter sometimes collectively
          called the "Obligees").

                    In contemplation of certain Transactions (as said term
          is defined in the 1995 Agreement hereinafter referred to),
          including a cash tender offer by a wholly-owned subsidiary of YPF
          for shares of Common Stock of the Company as a result of which
          the Company would become a subsidiary of YPF, the Company and
          Prudential are entering into an agreement of even date herewith
          (the "1995 Agreement," all capitalized terms used herein without
          definition being used herein as the same are defined in the 1995
          Agreement).  In connection therewith Prudential has requested,
          among other things, that YPF make provision with respect to
          certain expenses of Prudential, and YPF is willing to do so, all
          on the terms and conditions hereinafter set forth.

                    NOW, THEREFORE, this Agreement 

                                 W I T N E S S E T H:

                    For and in consideration of the execution and delivery
          by Prudential of the 1995 Agreement, and the taking by Prudential
          of the actions specified therein to be taken by it, YPF does
          hereby covenant and agree, for the benefit of Prudential and each
          of the other Obligees from time to time, as follows:

                    1.   Expenses.  YPF agrees, whether or not the
                         ---------
          Transactions contemplated by the 1995 Agreement shall be
          consummated, to pay, and save the Obligees harmless against
          liability for the payment of, all reasonable out-of-pocket
          expenses arising in connection with the 1995 Agreement, and the
          Transactions contemplated thereby, including without limitation,
          all such expenses incurred with respect to the enforcement of any
          provision of any agreement or instrument, any amendments or
          waivers (whether or not the same become effective) under or in
          respect of any such agreement or instrument, and all reasonable
          expenses incurred in connection with the preparation of such
          agreements and instruments which may be payable in respect of the
          execution and delivery of such agreements or instruments, and the
          reasonable fees and expenses of special counsel and all local
          counsel retained in connection with such agreements and
          instruments, and the Transactions contemplated by the 1995
          Agreement, including the enforcement of any provision thereof,
          and any such amendments or waivers, including without limitation
          costs and expenses incurred in any bankruptcy case.  The
          obligations of YPF under this paragraph 1 shall survive the
          transfer or redemption of any Shares.


<PAGE>


                    2.   Consent to Jurisdiction and Service of Process.
                         ----------------------------------------------
          (a) YPF consents to the non-exclusive jurisdiction of any court
          of the State of New York or any United States federal court
          sitting in the Borough of Manhattan, New York City, New York,
          United States, and any appellate court from any thereof, and
          waives any immunity from the jurisdiction of such courts over any
          suit, action or proceeding that may be brought in connection with
          this Agreement. YPF irrevocably waives, to the fullest extent
          permitted by law, any objection to any suit, action, or
          proceeding that may be brought in connection with this Agreement
          in such courts whether on the grounds of venue, residence or
          domicile or on the ground that any such suit, action or
          proceeding has been brought in an inconvenient forum.  YPF agrees
          that final judgment in any such suit, action or proceeding
          brought in such court shall be conclusive and binding upon YPF
          and may be enforced in any court to the jurisdiction of which YPF
          is subject by suit upon such judgment; provided that service of
                                                 --------
          process is effected upon YPF in the manner provided in this
          Agreement.  Notwithstanding the foregoing, any suit, action or
          proceeding brought in connection with this Agreement may be
          instituted in any competent court in Argentina.

                         (b)  YPF agrees that service of all writs, process
          and summonses in any suit, action or proceeding brought in
          connection with this Agreement against YPF in any court sitting
          in the Borough of Manhattan, New York City may be made upon CT
          Corporation System at 1633 Broadway, New York, New York 10019,
          whom YPF irrevocably appoints as its authorized agent for service
          of process.  YPF represents and warrants that CT Corporation
          System has agreed to act as YPF's agent for service of process. 
          YPF agrees that such appointment shall be irrevocable so long as
          this Agreement shall remain in effect or until the irrevocable
          appointment by YPF of a successor in The City of New York as its
          authorized agent for such purpose and the acceptance of such
          appointment by such successor.  YPF further agrees to take any
          and all action, including the filing of any and all documents and
          instruments, that may be necessary to continue such appointment
          in full force and effect as aforesaid.  If CT Corporation System
          shall cease to be YPF's agent for service of process, YPF shall
          appoint without delay another such agent and provide prompt
          written notice to the Obligees, to the extent known to it, of
          such appointment.  With respect to any such action in any court
          of the State of New York or any United States federal court in
          the Borough of Manhattan, New York City, service of process upon
          CT Corporation System, as the authorized agent of YPF for service
          of process, and written notice of such service to YPF, shall be
          deemed, in every respect, effective service of process upon YPF.

                         (c)  Nothing in this paragraph 2 shall affect the
          right of any party to serve legal process in any other manner
          permitted by law or affect the right of any party to bring any
          action or proceeding against any other party or its property in
          the courts of other jurisdictions.


                    3.   Payments of Additional Amounts.  All payments in
                         ------------------------------
          respect of this Agreement shall be made by YPF without
          withholding or deduction for or on account of any present or
          future taxes, duties, levies, or other governmental charges of
          whatever nature in effect on the date of this Agreement or
          imposed or established in the future by or on behalf of Argentina
          or any authority in Argentina.  In the event any such taxes or
          liabilities are so imposed or established, YPF shall pay such
          additional amounts as may be necessary in order that the net
          amounts receivable by the Obligees after any withholding or
          deduction in respect


                                          2


<PAGE>


          of such tax or liability shall equal the amounts that would have
          been receivable in respect of this Agreement in the absence of
          such withholding or deduction; except that no such additional
          amounts will be payable with respect to any withholding or
          deduction on any security to, or to a third party on behalf of,
          an Obligee for or on account of any such taxes or liabilities
          that have been imposed by reason of the Obligee being a resident
          of Argentina or having some connection with Argentina other than
          the mere holding of the Shares or the receipt of payments
          hereunder.  Furthermore, no additional amounts shall be paid with
          respect to any payment under this Agreement to an Obligee that is
          a fiduciary or partnership or other than the sole beneficial
          owner of such payment to the extent that a beneficiary or settlor
          with respect to such fiduciary or a member of such partnership or
          beneficial owner would not have been entitled to receive the
          additional amounts had such beneficiary, settlor, member or
          beneficial owner been the Obligee.

                    4.   Governing Law.  This Agreement is being delivered
                         -------------
          and is intended to be performed in the State of New York, and
          shall be construed and enforced in accordance with, and the
          rights of the parties shall be governed by, the law of such
          State.

                    5.   Effectiveness.  This Agreement shall take effect
                         -------------
          upon (and concurrently with) the execution and delivery by the
          Company and Prudential of the 1995 Agreement. 

                    6.   Successors and Assigns.  All covenants and
                         ----------------------
          agreements in this Agreement contained shall bind and inure to
          the benefit of (a) YPF and its successors and assigns and (b) the
          Obligees.  This Agreement shall not be assignable, in whole or in
          part by any Obligee, except to another Obligee, without the prior
          written consent of YPF.

                    7.   Notices.  All communications provided for
                         -------
          hereunder shall be sent by first class mail and (a) if to
          Prudential, addressed to it in care of Prudential Capital Group,
          1201 Elm Street, Suite 4900, Dallas, Texas 75270, Attention:
          Managing Director, or to such other address as it may have
          designated to YPF in writing, (b) if to any other Obligee,
          addressed to such Obligee at the address of such Obligee in the
          stock record books of the Company, and (c) if to YPF, at its
          address set forth in the prefatory paragraph of this Agreement,
          Attention: President, or to such other address as it shall have
          designated to the Obligees in writing.

                    IN WITNESS WHEREOF, YPF has caused this Agreement to be
          executed by its officer thereunto duly authorized, all as of the
          day and year first above written.


                                             YPF SOCIEDAD ANONIMA


                                             By:                           
                                                 --------------------------
                                                 Name:
                                                                            
                                         Title:


                                          3




© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission