CITGO PETROLEUM CORP
8-K, 1997-11-18
CRUDE PETROLEUM & NATURAL GAS
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================================================================================

                                 UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                            WASHINGTON, D.C.  20549

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

                                    FORM 8-K


                                 CURRENT REPORT
                       PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934


       DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): OCTOBER 28, 1997

                          CITGO PETROLEUM CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                                      
            DELAWARE                        1-14380              73-1173881
(STATE OR OTHER JURISDICTION OF    (COMMISSION FILE NUMBER)   (I.R.S. EMPLOYER
 INCORPORATION OR ORGANIZATION)                              IDENTIFICATION NO.)


                                ONE WARREN PLACE
                             6100 SOUTH YALE AVENUE
                             TULSA, OKLAHOMA 74136
                             (ADDRESS OF PRINCIPAL
                               EXECUTIVE OFFICES
                                 AND ZIP CODE)

                                 (918) 495-4000
                        (REGISTRANT'S TELEPHONE NUMBER,
                              INCLUDING AREA CODE)

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

================================================================================
<PAGE>   2
ITEM 5. OTHER EVENTS

         On October 28, 1997, CITGO Petroleum Corporation (the "Company")
entered into a Selling Agency Agreement ("Selling Agency Agreement") with
Salomon Brothers Inc and Chase Securities Inc. providing for the sale of up to
$235 million in aggregate principal amount of notes in tranches from time to
time by the Company under a Medium Term Note Program.  Any tranche of notes
could have a maturity ranging from nine months to 30 years from the date of
issuance and could bear interest at a fixed rate or at a fluctuating rate based
on one of several possible indices.  The Medium Term Note Program was
established under the shelf registration of $600 million in aggregate principal
amount of debt securities pursuant to the Registration Statement (333-3226)
declared effective by the Securities and Exchange Commission on May 17, 1996.
Attached as Exhibit 99.1 and incorporated herein by reference is a copy of the
Selling Agency Agreement.  Attached as Exhibit 99.2 and incorporated herein by
reference is a form of fixed rate note relating to the Medium Term Note
Program.  Attached as Exhibit 99.3 and incorporated herein by reference is a
form of floating rate note relating to the Medium Term Note Program.

ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

         (c)     EXHIBITS

         Exhibit 99.1      --     Selling Agency Agreement, dated as of October
                                  28, 1997, among CITGO Petroleum Corporation,
                                  Salomon Brothers Inc and Chase Securities
                                  Inc. relating to the Medium Term Note
                                  Program.
         Exhibit 99.2     --      Form of fixed rate note relating to the
                                  Medium Term Note Program.
         Exhibit 99.3     --      Form of floating rate note relating to the
                                  Medium Term Note Program.
<PAGE>   3
                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                             CITGO PETROLEUM CORPORATION


Date: November 18, 1997

                                             By:
                                                -------------------------------
                                                   R. M. Bright,
                                                   Controller 
                                                   (Chief Accounting Officer)





<PAGE>   4
                                 EXHIBIT INDEX

Exhibit No.                           
- ----------

Exhibit 99.1     --   Selling Agency Agreement, dated as of October 28, 1997, 
                      among CITGO Petroleum Corporation, Salomon Brothers Inc 
                      and Chase Securities Inc. relating to the Medium Term Note
                      Program.
Exhibit 99.2     --   Form of fixed rate note relating to the Medium Term Note 
                      Program.  
Exhibit 99.3     --   Form of floating rate note relating to the Medium Term 
                      Note Program.



<PAGE>   1
                                                                    Exhibit 99.1





                          CITGO Petroleum Corporation

                         $235,000,000 Medium-Term Notes
                            Due Nine Months or More
                               From Date of Issue

                            Selling Agency Agreement


                                                                October 28, 1997
                                                              New York, New York


Salomon Brothers Inc
Seven World Trade Center
New York, N.Y. 10048

Chase Securities Inc.
270 Park Avenue
New York, NY  10017


Dear Sirs:

                 CITGO Petroleum Corporation, a Delaware corporation (the
"Company"), confirms its agreement with each of you with respect to the issue
and sale by the Company of up to $235,000,000 aggregate principal amount of its
Medium-Term Notes Due Nine Months or More from Date of Issue (the "Notes").
The Notes will be issued under an indenture (the "Indenture") dated as of May
1, 1996  between the Company and The First National Bank of Chicago, as trustee
(the "Trustee").  Unless otherwise specifically provided for and set forth in a
Pricing Supplement (as defined below), the Notes will be issued in minimum
denominations of $1,000 and in denominations exceeding such amount by integral
multiples of $1,000, will be issued only in fully registered form and will have
the interest rates, maturities and, if applicable, other terms set forth in
such
<PAGE>   2
                                                                             -2-


Pricing Supplement.  The Notes will be issued, and the terms thereof
established, in accordance with the Indenture and the Medium-Term Notes
Administrative Procedures attached hereto as Exhibit A (the "Procedures")
(unless a Terms Agreement (as defined in Section 2(b)) modifies or otherwise
supersedes such Procedures with respect to the Notes issued pursuant to such
Terms Agreement).  The Procedures may be amended only by written agreement of
the Company and you after notice to, and with the approval of, the Trustee.
For the purposes of this Agreement and subject to Section 12 hereof, the term
"Agent" shall refer to any of you acting solely in the capacity as agent for
the Company pursuant to Section 2(a) and not as principal (collectively, the
"Agents"), the term "Purchaser" shall refer to one of you acting solely as
principal pursuant to Section 2(b) and not as agent, and the term "you" shall
refer to you collectively whether at any time any of you is acting in both such
capacities or in either such capacity.  In acting under this Agreement, in
whatever capacity, each of you is acting individually and not jointly.

                 1.  Representations and Warranties.  The Company represents
and warrants to, and agrees with, you as set forth below in this Section 1.
Certain terms used in this Section 1 are defined in paragraph (e) hereof.

                 (a)  The Company has complied with the requirements for use of
         Form S-3 under the Securities Act of 1933 (the "Act") and has filed
         with the Securities and Exchange Commission (the "Commission") a
         registration statement on such Form or Schedule (File Number:
         333-3226), including a basic prospectus, which has become effective,
         for the registration under the Act of $600,000,000 aggregate principal
         amount of debt securities (the "Securities"), including the Notes.
         Such registration statement, as amended at the date of this Agreement,
         meets the requirements set forth in Rule 415(a)(1)(ix) or (x) under
         the Act and complies in all other material respects with said Rule.
         The Company has included in such registration statement, or has filed
         or will file with the Commission pursuant to the applicable paragraph
         of Rule 424(b) under the Act, a supplement to the form of prospectus
         included in such registration statement relating to the Notes and the
         plan of distribution thereof (the "Prospectus Supplement").  In
         connection with the sale of
<PAGE>   3
                                                                             -3-

         Notes the Company proposes to file with the Commission pursuant to the
         applicable paragraph of Rule 424(b) under the Act further supplements
         to the Prospectus Supplement (each a "Pricing Supplement") specifying
         the interest rates, maturity dates and, if appropriate, other similar
         terms of the Notes sold pursuant hereto or the offering thereof.

                 (b)  As of the Execution Time, on the Effective Date, when any
         supplement to the Prospectus is filed with the Commission, as of the
         date of a Terms Agreement and at the date of delivery by the Company
         of any Notes sold hereunder (a"Closing Date"), (i) the Registration
         Statement, as amended as of any such time, and the Prospectus, as
         supplemented as of any such time, and the Indenture will comply in all
         material respects with the applicable requirements of the Act, the
         Trust Indenture Act of 1939 (the "Trust Indenture Act") and the
         Securities Exchange Act of 1934 (the "Exchange Act") and the
         respective rules thereunder; (ii) the Registration Statement, as
         amended as of any such time, did not or will not 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 not misleading; and (iii) the Prospectus, as
         supplemented as of any such time, will not contain any untrue
         statement of a material fact or omit to state a material fact
         necessary in order to make the statements therein, in the light of the
         circumstances under which they were made, not misleading; provided,
         however, that the Company makes no representations or warranties as to
         (i) that part of the Registration Statement which shall constitute the
         Statement of Eligibility and Qualification (Form T-1) under the Trust
         Indenture Act of the Trustee or (ii) the information contained in or
         omitted from the Registration Statement or the Prospectus (or any
         supplement thereto) in reliance upon and in conformity with
         information furnished in writing to the Company by any of you
         specifically for inclusion in the Registration Statement or the
         Prospectus (or any supplement thereto).

                 (c) As of the time any Notes are issued and sold hereunder,
         the Indenture will constitute a legal, valid and binding instrument
         enforceable against the Company in accordance with its terms subject
         to the effect of (i) general
<PAGE>   4
                                                                             -4-

         principles of equity, regardless of whether such enforceability is
         considered in a proceeding in equity or at law, and (ii) any
         applicable bankruptcy, insolvency, reorganization, moratorium or
         similar laws affecting creditors' rights generally, and such Notes
         will have been duly authorized, executed, authenticated and, when paid
         for by the purchasers thereof, will constitute legal, valid and
         binding obligations of the Company entitled to the benefits of the
         Indenture.

                 (d)  The terms which follow, when used in this Agreement,
         shall have the meanings indicated.  The term "the Effective Date"
         shall mean each date that the Registration Statement and any
         post-effective amendment or amendments thereto became or become
         effective and each date after the date hereof on which a document
         incorporated by reference in the Registration Statement is filed.
         "Execution Time" shall mean the date and time that this Agreement is
         executed and delivered by the parties hereto.  "Basic Prospectus"
         shall mean the form of basic prospectus relating to the Securities
         contained in the Registration Statement at the Effective Date.
         "Prospectus" shall mean the Basic Prospectus as supplemented by the
         Prospectus Supplement.  "Registration Statement" shall mean the
         registration statement referred to in paragraph (a) above, including
         incorporated documents, exhibits and financial statements, as amended
         at the Execution Time.  "Rule 415" and "Rule 424" refer to such rules
         under the Act.  Any reference herein to the Registration Statement,
         the Basic Prospectus , the Prospectus Supplement or the Prospectus
         shall be deemed to refer to and include the documents incorporated by
         reference therein pursuant to Item 12 of Form S-3, which were filed
         under the Exchange Act on or before the Effective Date of the
         Registration Statement or the issue date of the Basic Prospectus, the
         Prospectus Supplement or the Prospectus, as the case may be; and any
         reference herein to the terms "amend", "amendment" or "supplement"
         with respect to the Registration Statement, the Basic Prospectus, the
         Prospectus Supplement
<PAGE>   5
                                                                             -5-

         or the Prospectus shall be deemed to refer to and include the filing
         of any document under the Exchange Act after the Effective Date of the
         Registration Statement or the issue date of the Basic Prospectus, the
         Prospectus Supplement or the Prospectus, as the case may be, deemed to
         be incorporated therein by reference.

                 2.  Appointment of Agents; Solicitation by the Agents of 
Offers to Purchase; Sales of Notes to a Purchaser. (a)  Subject to the terms
and conditions set forth herein, the Company hereby authorizes each of the
Agents to act as its agent to solicit offers for the purchase of all or part of
the Notes from the Company.


                 On the basis of the representations and warranties, and
subject to the terms and conditions set forth herein, each of the Agents
agrees, as agent of the Company, to use its reasonable efforts to solicit
offers to purchase the Notes from the Company upon the terms and conditions set
forth in the Prospectus (and any supplement thereto) and in the Procedures.
Each Agent shall make reasonable efforts to assist the Company in obtaining
performance by each purchaser whose offer to purchase Notes has been solicited
by such Agent and accepted by the Company, but such Agent shall not, except as
otherwise provided in this Agreement, be obligated to disclose the identity of
any purchaser or have any liability to the Company in the event any such
purchase is not consummated for any reason.  Except as provided in Section
2(b), under no circumstances will any Agent be obligated to purchase any Notes
for its own account.  It is understood and agreed, however, that any Agent may
purchase Notes as principal pursuant to Section 2(b).

                 The Company reserves the right, in its sole discretion, to
instruct the Agents to suspend at any time, for any period of time or
permanently, the solicitation of offers to purchase Notes.  Upon receipt of
instructions from the Company, the Agents will forthwith suspend solicitation
of offers to purchase Notes from the Company until such time as the Company has
advised them that such solicitation may be resumed.

                 The Company agrees to pay each Agent a commission, on the
Closing Date with respect to each sale of Notes by the Company as a result of a
solicitation made by such Agent, in an amount equal to that percentage
specified in Schedule I hereto of the aggregate principal amount of the Notes
sold by the Company.  Such commission shall be payable as specified in the
Procedures.
<PAGE>   6
                                                                             -6-



                 Subject to the provisions of this Section and to the
Procedures, offers for the purchase of Notes may be solicited by an Agent as
agent for the Company at such time and in such amounts as such Agent deems
advisable.  The Company may from time to time offer Notes for sale otherwise
than through an Agent; provided, however, that, subject to Section 12 hereof,
so long as this Agreement is in effect the Company shall not solicit or accept
offers to purchase Notes through any agent other than an Agent.  It is
understood, however, that if from time to time the Company is approached by a
prospective agent offering to solicit a specific purchase of Notes, the Company
may engage such agent with respect to such specific purchase, provided that (i)
such agent is engaged on terms substantially similar (including the same
commission schedule) to the terms of this Agreement and (ii) the Agents are
given notice of such purchase promptly.

                 If the Company shall default in its obligations to deliver
Notes to a purchaser whose offer it has accepted, the Company shall indemnify
and hold each of you harmless against any loss, claim or damage arising from or
as a result of such default by the Company.

                 (b)  Subject to the terms and conditions stated herein,
whenever the Company and any of you determines that the Company shall sell
Notes directly to any of you as principal, each such sale of Notes shall be
made in accordance with the terms of this Agreement and a supplemental
agreement relating to such sale.  Each such supplemental agreement (which may
be either an oral or written agreement) is herein referred to as a "Terms
Agreement".  Each Terms Agreement shall describe the Notes to be purchased by
the Purchaser pursuant thereto and shall specify the aggregate principal amount
of such Notes, the price to be paid to the Company for such Notes, the maturity
date of such Notes, the rate at which interest will be paid on such Notes, the
dates on which interest will be paid on such Notes and the record date with
respect to each such payment of interest, the Closing Date for the purchase of
such Notes, the place of delivery of the Notes and payment therefor, the method
of payment and any requirements for the delivery of opinions of counsel,
certificates from the Company or its officers or a letter from the Company's
independent public accountants as described in Section 6(b).  Any such Terms
Agreement may also specify the period of time referred to in Section 4(m).  Any
<PAGE>   7
                                                                             -7-

written Terms Agreement may be in the form attached hereto as Exhibit B.  The
Purchaser's commitment to purchase Notes shall be deemed to have been made on
the basis of the representations and warranties of the Company herein contained
and shall be subject to the terms and conditions herein set forth.

                 Delivery of the certificates for Notes sold to the Purchaser
pursuant to a Terms Agreement shall be made not later than the Closing Date
agreed to in such Terms Agreement, against payment of funds to the Company in
the net amount due to the Company for such Notes by the method and in the form
set forth in the Procedures unless otherwise agreed to between the Company and
the Purchaser in such Terms Agreement.

                 Unless otherwise agreed to between the Company and the
Purchaser in a Terms Agreement, any Note sold to a Purchaser (i) shall be
purchased by such Purchaser at a price equal to 100% of the principal amount
thereof less a percentage equal to the commission applicable to an agency sale
of a Note of identical maturity and (ii) may be resold by such Purchaser at
varying prices from time to time or, if set forth in the applicable Terms
Agreement and Pricing Supplement, at a fixed public offering price.  In
connection with any resale of Notes purchased, a Purchaser may use a selling or
dealer group and may reallow to any broker or dealer any portion of the
discount or commission payable pursuant hereto.

                 3.  Offering and Sale of Notes.  Each Agent and the Company
agree to perform the respective duties and obligations specifically provided to
be performed by them in the Procedures.

                 4.  Agreements.  The Company agrees with you that:
                 (a)  Prior to the termination of the offering of the Notes
         (including by way of resale by a Purchaser of Notes), the Company will
         not file any amendment of the Registration Statement or supplement to
         the Prospectus (except for (i) periodic or current reports filed under
         the Exchange Act, (ii )a supplement relating to any offering of Notes
         providing solely for the specification of or a change in the maturity
         dates, interest rates, issuance prices or other similar terms of any
         Notes or (iii) a supplement relating to an offering of Securities
         other than the Notes) unless the Company has
<PAGE>   8
                                                                             -8-

         furnished each of you a copy for your review prior to filing and given
         each of you a reasonable opportunity to comment on any such proposed
         amendment or supplement.  Subject to the foregoing sentence, the
         Company will cause each supplement to the Prospectus to be filed with
         the Commission pursuant to the applicable paragraph of Rule 424(b)
         within the time period prescribed and will provide evidence
         satisfactory to you of such filing.  The Company will promptly advise
         each of you (i) when the Prospectus, and any supplement thereto, shall
         have been filed with the Commission pursuant to Rule 424(b), (ii)
         when, prior to termination of any offering of Notes, any amendment of
         the Registration Statement shall have been filed or become effective,
         (iii) of any request by the Commission for any amendment of the
         Registration Statement or supplement to the Prospectus or for any
         additional information, (iv) of the issuance by the Commission of any
         stop order suspending the effectiveness of the Registration Statement
         or the institution or threatening of any proceeding for that purpose
         and (v) of the receipt by the Company of any notification with respect
         to the suspension of the qualification of the Notes for sale in any
         jurisdiction or the initiation or threatening of any proceeding for
         such purpose.  The Company will use its best efforts to prevent the
         issuance of any such stop order and, if issued, to obtain as soon as
         possible the withdrawal thereof.

                 (b)  If, at any time when a prospectus relating to the Notes
         is required to be delivered under the Act, any event occurs as a
         result of which the Prospectus as then supplemented would include any
         untrue statement of a material fact or omit to state any material fact
         necessary to make the statements therein, in the light of the
         circumstances under which they were made, not misleading, or if it
         shall be necessary to amend the Registration Statement or to
         supplement the Prospectus to comply with the Act or the Exchange Act
         or the respective rules thereunder, the Company promptly will notify
         each of you to suspend solicitation of offers to purchase Notes (and,
         if so notified by the Company, each of you shall forthwith suspend
         such solicitation and cease using the Prospectus as then supplemented)
         and, upon such notification, your obligation to solicit offers to
         purchase Notes hereunder shall cease.  In the event that the Company
         desires you to
<PAGE>   9
                                                                             -9-

         thereafter commence solicitations of offers to purchase Notes, or in
         the event that any of you are holding Notes for resale, the Company
         shall (i) prepare and file with the Commission, subject to the first
         sentence of paragraph (a) of this Section 4, an amendment or
         supplement which will correct such statement or omission or effect
         such compliance and (ii) supply any supplemented Prospectus to each of
         you in such quantities as you may reasonably request.  If such
         amendment or supplement, and any documents, certificates and opinions
         furnished to each of you pursuant to paragraph (g) of this Section 4
         in connection with the preparation or filing of such amendment or
         supplement are satisfactory in all respects to you, you will, upon the
         filing of such amendment or supplement with the Commission and upon
         the effectiveness of an amendment to the Registration Statement, if
         such an amendment is required, resume your obligation to solicit
         offers to purchase Notes hereunder.

                 (c)  The Company, during the period when a prospectus relating
         to the Notes is required to be delivered under the Act, will file
         promptly all documents required to be filed with the Commission
         pursuant to Section 13(a), 13(c) or 15(d) of the Exchange Act and will
         furnish to each of you copies of such documents.  In addition, on or
         prior to the date on which the Company makes any announcement to the
         general public concerning earnings or concerning any other event which
         is required to be described, or which the Company proposes to
         describe, in a document filed pursuant to the Exchange Act, the
         Company will furnish to each of you the information contained or to be
         contained in such announcement.  The Company will notify each of you
         as soon as practicable of (i) any decrease in the rating of the Notes
         or any other debt securities of the Company by any "nationally
         recognized statistical rating organization" (as defined for purposes
         of Rule 436(g) under the Act) or (ii) any notice given of any intended
         or potential decrease in any such rating or of a possible change in
         any such rating that does not indicate the direction of the possible
         change, as soon as the Company learns of any such decrease or notice.

                 (d)  As soon as practicable, the Company will make generally
         available to its security holders and to each of you
<PAGE>   10
                                                                            -10-

         an earnings statement or statements of the Company and its
         subsidiaries which will satisfy the provisions of Section 11(a) of the
         Act and Rule 158 under the Act.

                 (e)  The Company will furnish to each of you and your counsel,
         without charge, copies of the Registration Statement (including
         exhibits thereto) and, so long as delivery of a prospectus may be
         required by the Act, as many copies of the Prospectus and any
         supplement thereto as you may reasonably request.

                 (f)  The Company will arrange for the qualification of the
         Notes for sale under the laws of such jurisdictions as any of you may
         designate, will maintain such qualifications in effect so long as
         required for the distribution of the Notes (provided that the Company
         shall not be required in connection therewith to qualify as a foreign
         corporation or to execute a general consent to service of process in
         any state), and will arrange for the determination of the legality of
         the Notes for purchase by institutional investors.

                 (g)  The Company shall furnish to each of you such
         information, documents, certificates of officers of the Company and
         opinions of counsel for the Company relating to the business,
         operations and affairs of the Company, the Registration Statement, the
         Prospectus, and any amendments thereof or supplements thereto, the
         Indenture, the Notes, this Agreement, the Procedures and the
         performance by the Company and you of its and your respective
         obligations hereunder and thereunder as any of you may from time to
         time and at any time prior to the termination of this Agreement
         reasonably request.

                 (h)  The Company shall, whether or not any sale of the Notes
         is consummated, (i) pay all expenses incident to the performance of
         its obligations under this Agreement and any Terms Agreement,
         including the fees and disbursements of its accountants and counsel,
         the cost of printing or other production and delivery of the
         Registration Statement, the Prospectus, all amendments thereof and
         supplements thereto, the Indenture, this Agreement, any Terms
         Agreement and all other documents relating to the offering, the cost
         of preparing, printing, packaging and delivering the Notes, the fees
<PAGE>   11
                                                                            -11-

         and disbursements, including fees of counsel, incurred in compliance
         with Section 4(f), the fees and disbursements of the Trustee and the
         fees of any agency that rates the Notes, (ii) reimburse each of you as
         requested for all reasonable out-of-pocket expenses (including without
         limitation advertising expenses), if any, incurred by you in
         connection with this Agreement and (iii) pay the reasonable fees and
         expenses of your counsel incurred in connection with this Agreement
         and incurred from time to time in connection with the transactions
         contemplated hereby.

                 (i)  Each acceptance by the Company of an offer to purchase
         Notes will be deemed to be an affirmation that its representations and
         warranties contained in this Agreement are true and correct at the
         time of such acceptance, as though made at and as of such time, and a
         covenant that such representations and warranties will be true and
         correct at the time of delivery to the purchaser of the Notes relating
         to such acceptance, as though made at and as of such time (it being
         understood that for purposes of the foregoing affirmation and covenant
         such representations and warranties shall relate to the Registration
         Statement and Prospectus as amended or supplemented at each such
         time).  Each such acceptance by the Company of an offer for the
         purchase of Notes shall be deemed to constitute an additional
         representation, warranty and agreement by the Company that, as of the
         settlement date for the sale of such Notes, after giving effect to the
         issuance of such Notes, of any other Notes to be issued on or prior to
         such settlement date and of any other Securities to be issued and sold
         by the Company on or prior to such settlement date, the aggregate
         amount of Securities (including any Notes) which have been issued and
         sold by the Company will not exceed the amount of Securities
         registered pursuant to the Registration Statement.  The Company will
         inform you promptly upon your request of the aggregate amount of
         Securities registered under the Registration Statement which remain
         unsold.

                 (j)  Each time that the Registration Statement or the
         Prospectus is amended or supplemented (other than by an amendment or
         supplement relating to any offering of Securities other than the Notes
         or providing solely for the specification
<PAGE>   12
                                                                            -12-

         of or a change in the maturity dates, the interest rates, the issuance
         prices or other similar terms of any Notes sold pursuant hereto), the
         Company will deliver or cause to be delivered promptly to each of you
         a certificate of the Company, signed by the Chief Executive Officer,
         the President, or any Vice President and the principal financial
         officer, Treasurer, or principal accounting officer of the Company,
         dated the date of the effectiveness of such amendment or the date of
         the filing of such supplement, in form reasonably satisfactory to you,
         of the same tenor as the certificate referred to in Section 5(d) but
         modified to relate to the last day of the fiscal quarter for which
         financial statements of the Company were last filed with the
         Commission and to the Registration Statement and the Prospectus as
         amended and supplemented to the time of the effectiveness of such
         amendment or the filing of such supplement.

                 (k)  Each time that the Registration Statement or the
         Prospectus is amended or supplemented (other than by an amendment or
         supplement (i) relating to any offering of Securities other than the
         Notes or (ii) providing solely for the specification of or a change in
         the maturity dates, the interest rates, the issuance prices or other
         similar terms of any Notes sold pursuant hereto), the Company shall
         furnish or cause to be furnished promptly to each of you a written
         opinion of counsel of the Company satisfactory to each of you, dated
         the date of the effectiveness of such amendment or the date of the
         filing of such supplement, in form satisfactory to each of you, of the
         same tenor as the opinion referred to in Section 5(b) but modified to
         relate to the Registration Statement and the Prospectus as amended and
         supplemented to the time of the effectiveness of such amendment or the
         filing of such supplement or, in lieu of such opinion, counsel last
         furnishing such an opinion to you may furnish each of you with a
         letter to the effect that you may rely on such last opinion to the
         same extent as though it were dated the date of such letter
         authorizing reliance (except that statements in such last opinion will
         be deemed to relate to the Registration Statement and the Prospectus
         as amended and supplemented to the time of the effectiveness of such
         amendment or the filing of such supplement).
<PAGE>   13
                                                                            -13-



                 (l)  Each time that the Registration Statement or the
         Prospectus is amended or supplemented to include or incorporate
         amended or supplemental financial information, the Company shall cause
         its independent public accountants promptly to furnish each of you a
         letter, dated the date of the effectiveness of such amendment or the
         date of the filing of such supplement, in form satisfactory to each of
         you, of the same tenor as the letter referred to in Section 5(e) with
         such changes as may be necessary to reflect the amended and
         supplemental financial information included or incorporated by
         reference in the Registration Statement and the Prospectus, as amended
         or supplemented to the date of such letter; provided, however, that,
         if the Registration Statement or the Prospectus is amended or
         supplemented solely to include or incorporate by reference financial
         information as of and for a fiscal quarter, the Company's independent
         public accountants may limit the scope of such letter, which shall be
         satisfactory in form to each of you, to the unaudited financial
         statements, the related "Management's Discussion and Analysis of
         Financial Condition and Results of Operations" and any other
         information of an accounting, financial or statistical nature included
         in such amendment or supplement, unless, in the reasonable judgment of
         any of you, such letter should cover other information or changes in
         specified financial statement line items.

                 (m)  During the period, if any, specified (whether orally or
         in writing) in any Terms Agreement, the Company shall not, without the
         prior consent of the Purchaser thereunder, offer, sell or contract to
         sell, or otherwise dispose of, directly or indirectly, or announce the
         offering of, any debt securities issued or guaranteed by the Company
         substantially similar to the Securities sold pursuant to such Terms
         Agreement.

                 (n)  The Company shall not be required to comply with the
         provisions of subsections (j), (k) or (l) of this Section during any
         period from the time (i) the Agents shall have suspended solicitation
         of purchases of the Notes pursuant to a request from the Company and
         (ii) the Agents shall not then hold any Notes purchased as principal
         pursuant hereto, until the time the Company shall determine that
         solicitation of
<PAGE>   14
                                                                            -14-

         purchases of the Notes should be resumed or you shall subsequently
         purchase Notes from the Company as principal.

                 5.  Conditions to the Obligations of the Agents.  The
obligations of each Agent to solicit offers to purchase the Notes shall be
subject to the accuracy of the representations and warranties on the part of
the Company contained herein as of the Execution Time, on the Effective Date,
when any supplement to the Prospectus is filed with the Commission and as of
each Closing Date, to the accuracy of the statements of the Company made in any
certificates pursuant to the provisions hereof, to the performance by the
Company of its obligations hereunder and to the following additional
conditions:

                 (a)  If filing of the Prospectus, or any supplement thereto,
         is required pursuant to Rule 424(b), the Prospectus, and any such
         supplement, shall have been filed in the manner and within the time
         period required by Rule 424(b); and no stop order suspending the
         effectiveness of the Registration Statement shall have been issued and
         no proceedings for that purpose shall have been instituted or
         threatened.

                 (b)  The Company shall have furnished to each Agent the
         opinion of Andrews & Kurth L.L.P., counsel for the Company, dated the
         Execution Time, to the effect that:

                          (i) each of the Company and CITGO Refining and
                 Chemicals Company, L.P., CITGO East Coast Refining
                 Corporation, CITGO Asphalt Refining Company and CITGO
                 Investment Company (individually a "Subsidiary" and
                 collectively the "Subsidiaries") has been duly incorporated or
                 duly organized as a partnership and is validly existing as a
                 corporation or partnership in good standing under the laws of
                 the jurisdiction in which it is chartered or organized, with
                 full corporate or partnership power and authority to own its
                 properties and conduct its business as described in the
                 Prospectus, and is duly qualified to do business as a foreign
                 corporation or partnership and is in good standing under the
                 laws of each jurisdiction which requires such qualification
                 wherein it owns or leases material properties or conducts
                 material business;
<PAGE>   15
                                                                            -15-



                          (ii) all the outstanding shares of capital stock or
                 partnership interests of each Subsidiary have been duly and
                 validly authorized and issued and are fully paid and
                 nonassessable, and, except as otherwise set forth in the
                 Prospectus, all outstanding shares of capital stock or
                 partnership interests of the Subsidiaries are owned by the
                 Company either directly or through wholly owned subsidiaries
                 free and clear of any perfected security interest and, to the
                 knowledge of such counsel, after due inquiry, any other
                 security interests, claims, liens or encumbrances;

                          (iii) the Company's authorized equity capitalization
                 is as set forth in the Prospectus; and the Notes conform to
                 the description thereof contained in the Prospectus (subject
                 to the insertion in the Notes of the maturity dates, the
                 interest rates and other similar terms thereof which will be
                 described in supplements to the Prospectus as contemplated by
                 the fourth sentence of Section 1(a) of this Agreement);

                          (iv) the Indenture has been duly authorized, executed
                 and delivered, has been duly qualified under the Trust
                 Indenture Act, and constitutes a legal, valid and binding
                 instrument enforceable against the Company in accordance with
                 its terms (subject, as to enforcement of remedies, to
                 applicable bankruptcy, reorganization, insolvency, moratorium
                 or other laws affecting creditors' rights generally from time
                 to time in effect); and the Notes have been duly authorized
                 and, when executed and authenticated in accordance with the
                 provisions of the Indenture and delivered to and paid for by
                 the purchasers thereof, will constitute legal, valid and
                 binding obligations of the Company entitled to the benefits of
                 the Indenture;

                          (v) the Registration Statement has become effective
                 under the Act; any required filing of the Prospectus, and any
                 supplements thereto, pursuant to Rule 424(b) has been or will
                 be made in the manner and within the time period required by
                 Rule 424(b); to the best knowledge of such counsel, no stop
                 order suspending the effectiveness of
<PAGE>   16
                                                                            -16-

                 the Registration Statement has been issued and no proceedings
                 for that purpose have been instituted or threatened; and the
                 Registration Statement and the Prospectus (other than the
                 financial statements and other financial and statistical
                 information contained therein as to which such counsel need
                 express no opinion) comply as to form in all material respects
                 with the applicable requirements of the Act, the Exchange Act
                 and the Trust Indenture Act and the respective rules
                 thereunder; and such counsel has no reason to believe that the
                 Registration Statement at the Effective Date or at the
                 Execution Time contained any untrue statement of a material
                 fact or omitted to state any material fact required to be
                 stated therein or necessary to make the statements therein not
                 misleading or that the Prospectus includes any untrue
                 statement of a material fact or omits to state a material fact
                 necessary to make the statements therein, in the light of the
                 circumstances under which they were made, not misleading;

                          (vi) this Agreement has been duly authorized, 
                 executed and delivered by the Company;

                          (vii) no consent, approval, authorization or order of
                 any court or governmental agency or body is required for the
                 consummation of the transactions contemplated herein except
                 such as have been obtained under the Act and such as may be
                 required under the blue sky laws of any jurisdiction in
                 connection with the sale of the Notes as contemplated by this
                 Agreement and such other approvals (specified in such opinion)
                 as have been obtained;

                          (viii) none of the execution and delivery of the
                 Indenture, the issue and sale of the Notes, nor the
                 consummation of any other of the transactions herein
                 contemplated nor the fulfillment of the terms hereof will
                 conflict with, result in a breach or violation of, or
                 constitute a default under any law or the charter or by-laws
                 of the Company or the terms of any material indenture or other
                 agreement or instrument known to such counsel and to which the
                 Company or any of its
<PAGE>   17
                                                                            -17-

                 subsidiaries is a party or bound or any judgment, order,
                 regulation or decree known to such counsel to be applicable to
                 the Company or any of its subsidiaries of any court,
                 regulatory body, administrative agency, governmental body or
                 arbitrator having jurisdiction over the Company or any of its
                 subsidiaries;

                          (ix) to the best of such counsel's knowledge, after
                 due inquiry, no holders of securities of the Company have
                 rights to the registration of such securities under the
                 Registration Statement; and

                          (x) the information contained in the Prospectus under
                 the caption "Certain U.S. Federal Income Tax Considerations"
                 is a fair and accurate summary of the principal United States
                 Federal income tax consequences associated with the ownership
                 of the Notes.


         In rendering such opinion, Andrews & Kurth L.L.P. (i) may state that
         its opinion is limited to the laws of the States of Texas and New
         York, the corporate laws of the State of Delaware and the Federal laws
         of the United States and (ii) may rely (A) as to matters involving the
         application of laws of any jurisdiction other than the States of Texas
         and New York or the United States, to the extent deemed proper and
         specified in such opinion, upon the opinion of other counsel of good
         standing believed to be reliable and who are satisfactory to counsel
         for the Agents and (B) as to matters of fact, to the extent deemed
         proper, on certificates of responsible officers of the Company and
         public officials.  References to the Prospectus in this paragraph (b)
         include any supplements thereto at the date such opinion is rendered.

                 (c)  Each Agent shall have received from Cravath, Swaine &
         Moore, counsel for the Agents, such opinion or opinions, dated the
         date hereof, with respect to the issuance and sale of the Notes, the
         Indenture, the Registration Statement, the Prospectus (together with
         any supplement thereto) and other related matters as the Agents may
         reasonably require, and the Company shall have furnished to
<PAGE>   18
                                                                            -18-

         such counsel such documents as they reasonably request for the purpose
         of enabling them to pass upon such matters.

                 (d)  The Company shall have furnished to each Agent a
         certificate of the Company, signed by the Chief Executive Officer, the
         President or any Vice President and the principal financial officer,
         Treasurer or principal accounting officer of the Company, dated the
         Execution Time, to the effect that to the best of their knowledge
         based upon reasonable investigation:

                          (i) the representations and warranties of the Company
                 in this Agreement are true and correct in all material
                 respects on and as of the date hereof with the same effect as
                 if made on the date hereof and the Company has complied with
                 all the agreements and satisfied all the conditions on its
                 part to be performed or satisfied as a condition to the
                 obligation of the Agents to solicit offers to purchase the
                 Notes;

                          (ii) no stop order suspending the effectiveness of
                 the Registration Statement has been issued and no proceedings
                 for that purpose have been instituted or, to the Company's
                 knowledge, threatened; and

                          (iii) since the date of the most recent financial
                 statements included in the Prospectus (exclusive of any
                 supplement thereto), there has been no material adverse change
                 in the condition (financial or other), earnings, business or
                 properties of the Company and its consolidated subsidiaries
                 taken as a whole, whether or not arising from transactions in
                 the ordinary course of business, except as set forth in or
                 contemplated in the Prospectus (exclusive of any supplement
                 thereto).

                 (e)  At the Execution Time, Deloitte & Touche LLP  shall have
         furnished to each Agent a letter or letters (which may refer to
         letters previously delivered to the Agents), dated as of the Execution
         Time, in form and substance satisfactory to the Agents, confirming
         that they are independent accountants
<PAGE>   19
                                                                            -19-

         within the meaning of the Act and the Exchange Act and the respective
         applicable published rules and regulations thereunder and stating in
         effect that:

                          (i) in their opinion the audited financial
                 statements, financial statement schedules included or
                 incorporated in the Registration Statement and the Prospectus
                 and reported on by them comply in form in all material
                 respects with the applicable accounting requirements of the
                 Act and the Exchange Act and the related published rules and
                 regulations;

                          (ii) on the basis of a reading of the latest
                 unaudited financial statements made available by the Company
                 and its subsidiaries; their performance of the procedures
                 specified by the American Institute of Certified Public
                 Accountants for the review of interim financial information as
                 described in SAS No. 71, Interim Financial Information;
                 carrying out certain specified procedures (but not an
                 examination in accordance with generally accepted auditing
                 standards) which would not necessarily reveal matters of
                 significance with respect to the comments set forth in such
                 letter; a reading of the minutes of the meetings of the
                 stockholders and directors (including committees) of the
                 Company and the Subsidiaries; and inquiries of certain
                 officials of the Company who have responsibility for financial
                 and accounting matters of the Company and its subsidiaries as
                 to transactions and events subsequent to the date of the most
                 recent audited financial statements included or incorporated
                 in the Prospectus, nothing came to their attention which
                 caused them to believe that:

                                  (1) any unaudited financial statements
                          included or incorporated in the Registration
                          Statement and the Prospectus do not comply in form in
                          all material respects with applicable accounting
                          requirements and with the published rules and
                          regulations of the Commission with respect to
                          financial statements included or incorporated in
                          quarterly reports on Form 10-Q under the Exchange
                          Act; and said unaudited financial statements are
<PAGE>   20
                                                                            -20-

                          not in conformity with generally accepted accounting
                          principles applied on a basis substantially
                          consistent with that of the audited financial
                          statements included or incorporated in the
                          Registration Statement and the Prospectus;

                                  (2) with respect to the period subsequent to
                          the date of the most recent financial statements
                          (other than any capsule information), audited or
                          unaudited, included or incorporated in the
                          Registration Statement and the Prospectus, there
                          were, at a specified date not more than five business
                          days prior to the date of the letter, any increases
                          in total current and long- term debt, including
                          capitalized lease obligations, and short-term debt of
                          the Company and its subsidiaries or changes in common
                          stock of the Company or decreases in stockholders'
                          equity of the Company as compared with the amounts
                          shown on the most recent consolidated balance sheet
                          included or incorporated in the Registration
                          Statement and the Prospectus, or for the period from
                          the date of the most recent financial statements
                          included or incorporated in the Registration
                          Statement and the Prospectus to such specified date
                          there were any decreases, as compared with the
                          corresponding period in the preceding year in
                          consolidated net sales or income before income taxes
                          and extraordinary charge or in net income of the
                          Company and its subsidiaries, except in all instances
                          for changes or decreases set forth in such letter, in
                          which case the letter shall be accompanied by an
                          explanation by the Company as to the significance
                          thereof unless said explanation is not deemed
                          necessary by the Agents; or

                                  (3) the amounts included in any unaudited
                          "capsule" information included in the Registration
                          Statement and the Prospectus do not agree with the
                          amounts set forth in the unaudited financial
                          statements for the same periods or were not
                          determined on a basis substantially consistent with
<PAGE>   21
                                                                            -21-

                          that of the corresponding amounts in the audited
                          financial statements included or incorporated in the
                          Registration Statement and the Prospectus;

                          (iii) they have performed certain other specified
                 procedures as a result of which they determined that certain
                 information of an accounting, financial or statistical nature
                 (which is limited to accounting, financial or statistical
                 information derived from the general accounting records of the
                 Company and its subsidiaries) set forth in the Registration
                 Statement and the Prospectus and in Exhibit 12 to the
                 Registration Statement, including the information included or
                 incorporated in Items 1, 2, 6 and 7 of the Company's Annual
                 Report on Form 10-K, incorporated by reference in the
                 Registration Statement and the Prospectus, and the information
                 included in the "Management's Discussion and Analysis of
                 Financial Condition and Results of Operations" included or
                 incorporated by reference in the Company's Quarterly Reports
                 on Form 10-Q, incorporated in the Registration Statement and
                 the Prospectus, agrees with the accounting records of the
                 Company and its subsidiaries, excluding any questions of legal
                 interpretation; and

                          (iv) if unaudited pro forma financial statements are
                 included or incorporated in the Registration Statement and the
                 Prospectus, on the basis of a reading of the unaudited pro
                 forma financial statements, carrying out certain specified
                 procedures, inquiries of certain officials of the Company and
                 the acquired company who have responsibility for financial and
                 accounting matters, and proving the arithmetic accuracy of the
                 application of the pro forma adjustments to the historical
                 amounts in the pro forma financial statements, nothing came to
                 their attention which caused them to believe that the pro
                 forma financial statements do not comply in form in all
                 material respects with the applicable accounting requirements
                 of Rule 11-02 of Regulation S-X or that the pro forma
                 adjustments have not been properly applied to the historical
                 amounts in the compilation of such statements.
<PAGE>   22
                                                                            -22-



                 References to the Prospectus in this paragraph (e) include any
         supplement thereto at the date of the letter.

                 (f)  At the Execution Time, the Company shall have furnished
         to the Agents the opinion (addressed to the Agents) of Peer L.
         Anderson, Esq., Vice President and General Counsel for the Company, to
         the effect that:

                          (i) to the best knowledge of such counsel, there is
                 no pending or threatened action, suit or proceeding before any
                 court or governmental agency, authority or body or any
                 arbitrator involving the Company or any of its subsidiaries,
                 of a character required to be disclosed in the Registration
                 Statement which is not adequately disclosed in the Final
                 Prospectus, and there is no franchise, contract or other
                 document of a character required to be described in the
                 Registration Statement or Final Prospectus, or to be filed as
                 an exhibit, which is not described or filed as required; and
                 the statements included or incorporated in the Final
                 Prospectus describing any legal proceedings or material
                 contracts or agreements relating to the Company fairly
                 summarize such matters; and

                          (ii) the Registration Statement has become effective
                 under the Act; to the best knowledge of such counsel, no stop
                 order suspending the effectiveness of the Registration
                 Statement has been issued and no proceedings for that purpose
                 have been instituted or threatened; and such counsel has no
                 reason to believe that at the Effective Date the Registration
                 Statement contained any untrue statement of a material fact or
                 omitted to state any material fact required to be stated
                 therein or necessary to make the statements therein not
                 misleading or that the Final Prospectus includes any untrue
                 statement of the material fact or omits to state a material
                 fact necessary to make the statements therein, in the light of
                 the circumstances under which they were made, not misleading.

                 (g)  Prior to the Execution Time, the Company shall have
         furnished to each Agent such further information, documents,
<PAGE>   23
                                                                            -23-

         certificates and opinions of counsel as the Agents may reasonably
         request.

                 If any of the conditions specified in this Section 5 shall not
have been fulfilled in all material respects when and as provided in this
Agreement, or if any of the opinions and certificates mentioned above or
elsewhere in this Agreement shall not be in all material respects reasonably
satisfactory in form and substance to such Agents and counsel for the Agents,
this Agreement and all obligations of any Agent hereunder may be canceled at
any time by the Agents.  Notice of such cancelation shall be given to the
Company in writing or by telephone or telecopier confirmed in writing.

                 The documents required to be delivered by this Section 5 shall
be delivered at the office of Cravath, Swaine & Moore, counsel for the Agents,
at Worldwide Plaza, 825 Eighth Avenue, New York, New York, on the Execution
Date.

                 6.  Conditions to the Obligations of a Purchaser.  The
obligations of a Purchaser to purchase any Notes will be subject to the
accuracy of the representations and warranties on the part of the Company
herein as of the date of the related Terms Agreement and as of the Closing Date
for such Notes, to the performance and observance by the Company of all
covenants and agreements herein contained on its part to be performed and
observed and to the following additional conditions precedent:

                 (a)  No stop order suspending the effectiveness of the
         Registration Statement shall have been issued and no proceedings for
         that purpose shall have been instituted or threatened.

                 (b)  To the extent agreed to between the Company and the
         Purchaser in a Terms Agreement, the Purchaser shall have received,
         appropriately updated, (i) a certificate of the Company, dated as of
         the Closing Date, to the effect set forth in Section 5(d) (except that
         references to the Prospectus shall be to the Prospectus as
         supplemented as of the date of such Terms Agreement), (ii) the opinion
         of Andrews & Kurth L.L.P., counsel for the Company, dated as of the
         Closing Date, to the effect set forth in Section 5(b), (iii) the
         opinion of
<PAGE>   24
                                                                            -24-

         Cravath, Swaine & Moore, counsel for the Purchaser, dated as of the
         Closing Date, to the effect set forth in Section 5(c), (iv) the
         opinion of Peer L. Anderson, Esq., Vice President and General Counsel
         for the Company, dated as of the Closing Date, to the effect set forth
         in Section 5(f), and (v) letter of Deloitte & Touche LLP, independent
         accountants for the Company, dated as of the Closing Date, to the
         effect set forth in Section 5(e).

                 (c)  Prior to the Closing Date, the Company shall have
         furnished to the Purchaser such further information, certificates and
         documents as the Purchaser may reasonably request.

                 If any of the conditions specified in this Section 6 shall not
have been fulfilled in all material respects when and as provided in this
Agreement and the applicable Terms Agreement, or if any of the opinions and
certificates mentioned above or elsewhere in this Agreement or such Terms
Agreement and required to be delivered to the Purchaser pursuant to the terms
hereof and thereof shall not be in all material respects reasonably
satisfactory in form and substance to the Purchaser and its counsel, such Terms
Agreement and all obligations of the Purchaser thereunder and with respect to
the Notes subject thereto may be canceled at, or at any time prior to, the
respective Closing Date by the Purchaser.  Notice of such cancelation shall be
given to the Company in writing or by telephone or telecopier confirmed in
writing.

                 7.  Right of Person Who Agreed to Purchase to Refuse to
Purchase.  (a)  The Company agrees that any person who has agreed to purchase
and pay for any Note pursuant to a solicitation by any of the Agents shall have
the right to refuse to purchase such Note if, at the Closing Date therefor, any
condition set forth in Section 5 or 6, as applicable, shall not be satisfied.

                 (b)  The Company agrees that any person who has agreed to
purchase and pay for any Note pursuant to a solicitation by any of the Agents
shall have the right to refuse to purchase such Note if, subsequent to the
agreement to purchase such Note, any change, condition or development specified
in any of Sections 9(b)(i) through (v) shall have occurred (with the judgment
of the Agent which presented the offer to purchase such Note being substituted
<PAGE>   25
                                                                            -25-

for any judgment of a Purchaser required therein) the effect of which is, in
the judgment of the Agent which presented the offer to purchase such Note, so
material and adverse as to make it impractical or inadvisable to proceed with
the sale and delivery of such Note (it being understood that under no
circumstance shall any such Agent have any duty or obligation to the Company or
to any such person to exercise the judgment permitted to be exercised under
this Section 7(b) and Section 9(b)).

                 8.  Indemnification and Contribution.  (a)  The Company agrees
to indemnify and hold harmless each of you, the directors, officers, employees
and agents of each of you and each person who controls each of you within the
meaning of either the Act or the Exchange Act against any and all losses,
claims, damages or liabilities, joint or several, to which you, they or any of
you or them may become subject under the Act, the Exchange Act or other Federal
or state statutory law or regulation, at common law or otherwise, insofar as
such losses, claims, damages or liabilities (or actions in respect thereof)
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained in the registration statement for the registration
of the Securities as originally filed or in any amendment thereof, or in the
Prospectus or any preliminary Prospectus, or in any amendment thereof or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein, in the light of the circumstances
when made, not misleading, and agrees to reimburse each such indemnified party,
as incurred, for any legal or other expenses reasonably incurred by them in
connection with investigating or defending any such loss, claim, damage,
liability or action; provided, however, that the Company will not be liable in
any such case to the extent that any such loss, claim, damage or liability
arises out of or is based upon any such untrue statement or alleged untrue
statement or omission or alleged omission made therein in reliance upon and in
conformity with written information furnished to the Company by any of you
specifically for inclusion therein and, provided, further, that the foregoing
indemnity agreement with respect to any preliminary Prospectus shall not inure
to the benefit of any Agent, the directors, partners, officers, employees and
agents of each Agent and each person who controls such Agent within the meaning
of either the Act or the Exchange Act from whom the person asserting
<PAGE>   26
                                                                            -26-

any such loss, claim, damage, liability or action purchased securities  if a
copy of the final Prospectus (as then amended or supplemented if the Company
shall have furnished any amendments or supplements thereto) was not sent or
given to such person, if required by law so to have been delivered, at or prior
to the written confirmation of the sale of Securities to such person, and if
the final Prospectus (as so amended or supplemented) would have cured the
defect giving rise to such loss, claim, damage, liability or action.  This
indemnity agreement will be in addition to any liability which the Company may
otherwise have.

                 (b)  Each of you agrees to indemnify and hold harmless the
Company, each of its directors, each of its officers who signs the Registration
Statement and each person who controls the Company within the meaning of either
the Act or the Exchange Act, to the same extent as the foregoing indemnity from
the Company to you, but only with reference to written information relating to
such of you furnished to the Company by such of you specifically for inclusion
in the documents referred to in the foregoing indemnity.  This indemnity
agreement will be in addition to any liability which you may otherwise have.
The Company acknowledges that the statements set forth in the last paragraph of
the cover page, and under the heading "Plan of Distribution", of the Prospectus
Supplement constitute the only information furnished in writing by any of you
for inclusion in the documents referred to in the foregoing indemnity, and you
confirm that such statements are correct.

                 (c)  Promptly after receipt by an indemnified party under this
Section 8 of notice of the commencement of any action, such indemnified party
will, if a claim in respect thereof is to be made against the indemnifying
party under this Section 8, notify the indemnifying party in writing of the
commencement thereof; but the failure so to notify the indemnifying party (i)
will not relieve it from liability under paragraph (a) or (b) above unless and
to the extent it did not otherwise learn of such action and such failure
results in the forfeiture by the indemnifying party of substantial rights and
defenses and (ii) will not, in any event, relieve the indemnifying party from
any obligations to any indemnified party other than the indemnification
obligation provided in paragraph (a) or (b) above.  The indemnifying party
shall be entitled to appoint counsel of the indemnifying party's choice at the
indemnifying party's expense to represent the indemnified party in any action
<PAGE>   27
                                                                            -27-

for which indemnification is sought (in which case the indemnifying party shall
not thereafter be responsible for the fees and expenses of any separate counsel
retained by the indemnified party or parties except as set forth below);
provided, however, that such counsel shall be reasonably satisfactory to the
indemnified party.  Notwithstanding the indemnifying party's election to
appoint counsel to represent the indemnified party in an action, the
indemnified party shall have the right to employ separate counsel (including
local counsel), which in the case of either (i) or (ii) below shall be
reasonably satisfactory to the indemnified party, and the indemnifying party
shall bear the reasonable fees, costs and expenses of such separate counsel if
(i) the use of counsel chosen by the indemnifying party to represent the
indemnified party would present such counsel with an actual conflict of
interest, (ii) the actual or potential defendants in, or targets of, any such
action include both the indemnified party and the indemnifying party and the
indemnified party shall have reasonably concluded that there may be legal
defenses available to it and/or other indemnified parties which are different
from or additional to those available to the indemnifying party. (iii) the
indemnifying party shall not have employed counsel reasonably satisfactory to
the indemnified party to represent the indemnified party within a reasonable
time after notice of the institution of such action or (iv) the indemnifying
party shall authorize the indemnified party to employ separate counsel at the
expense of the indemnifying party; provided, however that in no event shall the
indemnifying party be liable for legal fees or expenses of more than one
primary firm representing the indemnified parties or more than one local
counsel in each state or jurisdiction in which an action in which
indemnification is available has been brought.  An indemnifying party will not,
without the prior written consent of the indemnified parties, settle or
compromise or consent to the entry of any judgment with respect to any pending
or threatened claim, action, suit or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not the
indemnified parties are actual or potential parties to such claim or action)
unless such settlement, compromise or consent includes an unconditional release
of each indemnified party from all liability arising out of such claim, action,
suit or proceeding.

                 (d)  In the event that the indemnity provided in paragraph (a)
or (b) of this Section 8 is unavailable to or
<PAGE>   28
                                                                            -28-

insufficient to hold harmless an indemnified party for any reason, the Company
and each of you agree to contribute to the aggregate losses, claims, damages
and liabilities (including legal or other expenses reasonably incurred in
connection with investigating or defending same) (collectively "Losses") to
which the Company and one or more of you may be subject in such proportion as
is appropriate to reflect the relative benefits received by the Company and by
each of you from the offering of the Notes from which such Losses arise;
provided, however, that in no case shall any of you be responsible for any
amount in excess of the commissions received by such of you in connection with
the sale of Notes from which such Losses arise (or, in the case of Notes sold
pursuant to a Terms Agreement, the aggregate commissions that would have been
received by such of you if such commissions had been payable). If the
allocation provided by the immediately preceding sentence is unavailable for
any reason, the Company and each of you shall contribute in such proportion as
is appropriate to reflect not only such relative benefits but also the relative
fault of the Company and of each of you in connection with the statements or
omissions which resulted in such Losses as well as any other relevant equitable
considerations.  Benefits received by the Company shall be deemed to be equal
to the total net proceeds from the offering (before deducting expenses) of the
Notes from which such Losses arise, and benefits received by each of you shall
be deemed to be equal to the total commissions received by such of you in
connection with the sale of Notes from which such Losses arise (or, in the case
of Notes sold pursuant to a Terms Agreement, the aggregate commissions that
would have been received by such of you if such commissions had been payable).
Relative fault shall be determined by reference to whether any alleged untrue
statement or omission relates to information provided by the Company or any of
you.  The Company and each of you agree that it would not be just and equitable
if contribution were determined by pro rata allocation or any other method of
allocation which does not take account of the equitable considerations referred
to above.  Notwithstanding the provisions of this paragraph (d), no person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Act) shall be entitled to contribution from any person who was not guilty
of such fraudulent misrepresentation.  For purposes of this Section 8, each
person who controls any of you within the meaning of the Act or the Exchange
Act and each director, officer, employee and agent of any of you shall have the
<PAGE>   29
                                                                            -29-

same rights to contribution as you and each person who controls the Company
within the meaning of either the Act or the Exchange Act, each officer of the
Company who shall have signed the Registration Statement and each director of
the Company shall have the same rights to contribution as the Company, subject
in each case to the applicable terms and conditions of this paragraph (d).

                 9.  Termination.  (a)  This Agreement will continue in effect
until terminated as provided in this Section 9.  This Agreement may be
terminated either by the Company as to any Agent or by any of you insofar as
this Agreement relates to any Agent, by giving written notice of such
termination to such Agent or the Company, as the case may be.  This Agreement
shall so terminate at the close of business on the first business day following
the receipt of such notice by the party to whom such notice is given.  In the
event of such termination, no party shall have any liability to the other party
hereto, except as provided in the fourth paragraph of Section 2(a), Section
4(h), Section 8 and Section 10.

                 (b)  Each Terms Agreement shall be subject to termination in
the absolute discretion of the Purchaser, by notice given to the Company prior
to delivery of any payment for any Note to be purchased thereunder, if prior to
such time (i) there shall have occurred, subsequent to the agreement to
purchase such Note, any change, or any development involving a prospective
change, in or affecting the business or properties of the Company and its
consolidated subsidiaries taken as a whole the effect of which is, in the
judgment of the Purchaser, so material and adverse as to make it impractical or
inadvisable to proceed with the offering or delivery of such Note, (ii) there
shall have been, subsequent to the agreement to purchase such Note, any
decrease in the rating of any of the Company's debt securities by any
"nationally recognized statistical rating organization" (as defined for
purposes of Rule 436(g) under the Act) or any notice given of any intended or
potential decrease in any such rating or of a possible change in any such
rating that does not indicate the direction of the possible change, (iii)
trading of any of the Company's securities shall have been suspended by the
Commission or the New York Stock Exchange or trading in securities generally on
the New York Stock Exchange shall have been suspended or limited or minimum
prices shall have been established on such Exchange, (iv) a banking moratorium
shall have been declared by either Federal or New York
<PAGE>   30
                                                                            -30-

State authorities or (v) there shall have occurred any outbreak or escalation
of hostilities, declaration by the United States of a national emergency or war
or other calamity or crisis the effect of which on financial markets is such as
to make it, in the judgment of the Purchaser, impracticable or inadvisable to
proceed with the offering or delivery of such Notes as contemplated by the
Prospectus (exclusive of any supplement thereto).

                 10.  Survival of Certain Provisions. The respective
agreements, representations, warranties, indemnities and other statements of
the Company or its officers and of you set forth in or made pursuant to this
Agreement will remain in full force and effect, regardless of any investigation
made by or on behalf of you or the Company or any of the directors, officers,
employees, agents or controlling persons referred to in Section 8 hereof, and
will survive delivery of and payment for the Notes.  The provisions of Sections
4(h) and 8 hereof shall survive the termination or cancelation of this
Agreement.  The provisions of this Agreement (including without limitation
Section 7 hereof) applicable to any purchase of a Note for which an agreement
to purchase exists prior to the termination hereof shall survive any
termination of this Agreement.  If at the time of termination of this Agreement
any Purchaser shall own any Notes with the intention of selling them, the
provisions of Section 4 shall remain in effect until such Notes are sold by the
Purchaser.

                 11.  Notices.  All communications hereunder will be in writing
and effective only on receipt, and, if sent to any of you, will be mailed,
delivered or telecopied and confirmed to such of you, at the address specified
in Schedule I hereto; or, if sent to the Company, will be mailed, delivered or
telecopied and confirmed to it at One Warren Place, 6100 South Yale Avenue,
Tulsa, OK 74136, facsimile number 918-495-5540, attention of the Treasurer,
with a copy to the General Counsel.

                 12.  Amendments.  This Agreement may be amended or
supplemented if, but only if, such amendment or supplement is in writing and is
signed by the Company and each Agent; provided that the Company may from time
to time, on seven days prior written notice to the Agents but without the
consent of any Agent, amend this Agreement to add as a party hereto one or more
additional firms registered under the Exchange Act, whereupon each such firm
<PAGE>   31
                                                                            -31-

shall become an Agent hereunder on the same terms and conditions as the other
Agents that are parties hereto.  The Agents shall sign any amendment or
supplement giving effect to the addition of any such firm as an Agent under
this Agreement.

                 13.  Successors.  This Agreement will inure to the benefit of
and be binding upon the parties hereto, their respective successors, the
directors, officers, employees, agents and controlling persons referred to in
Section 8 hereof and, to the extent provided in Section 7, any person who has
agreed to purchase Notes, and no other person will have any right or obligation
hereunder.

                 14.  APPLICABLE LAW.  THIS AGREEMENT WILL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT
REFERENCE TO PRINCIPLES OF CONFLICTS OF LAW.
<PAGE>   32
                                                                            -32-

                 If the foregoing is in accordance with your understanding of
our agreement, please sign and return to us the enclosed duplicate hereof,
whereupon this letter and your acceptance shall represent a binding agreement
among the Company and you.


                                           Very truly yours,

                                           CITGO Petroleum Corporation

                                           By:
                                              ---------------------------------
                                                            [Title]


The foregoing Agreement is
hereby confirmed and accepted
as of the date hereof.

Salomon Brothers Inc


By:                     
   ---------------------
      Vice President


Chase Securities Inc.


By:                     
   ---------------------
<PAGE>   33
                                                                            -33-




                                   SCHEDULE I

Commissions:

                 The Company agrees to pay each Agent a commission equal to the
following percentage of the principal amount of each Note sold on an agency
basis by such Agent:

<TABLE>
<CAPTION>
   Maturity                                     Commission Rate
   --------                                     ---------------
  <S>              <C>                             <C>
   9 months         to less than 12 months          .125%
                                       
  12 months         to less than 18 months          .150%
                                       
  18 months          to less than 2 years           .200%
                                       
   2 years           to less than 3 years           .250%
                                       
   3 years           to less than 4 years           .350%
                                       
   4 years           to less than 5 years           .450%
                                       
   5 years           to less than 6 years           .500%
                                       
   6 years           to less than 7 years           .550%
                                       
   7 years           to less than 8 years           .600%
                                       
   8 years           to less than 9 years           .600%
                                       
   9 years          to less than 10 years           .600%
                                       
  10 years          to less than 15 years           .625%
                                       
  15 years          to less than 20 years           .700%
                                       
  20 years          to less than 30 years           .750%
           
  30 years               and beyond             to be negotiated

</TABLE>


<PAGE>   34
                                                                            -34-





                 Unless otherwise specified in the applicable Terms Agreement,
the discount or commission payable to a Purchaser shall be determined on the
basis of the commission schedule set forth above.


Address for Notice to you:

                 Notices to Salomon Brothers Inc shall be directed to it at
Seven World Trade Center, New York, New York 10048, Attention of the
Medium-Term Note Department.

                 Notices to Chase Securities, Inc. shall be directed to it at
270 Park Avenue, New York, New York 10017, Attention of Medium-Term Note Desk.
<PAGE>   35
                                                                             -1-


                                                                       EXHIBIT B

                          CITGO  Petroleum Corporation

                               Medium Term Notes

                           Due More Than Nine Months
                               from Date of Issue

                                TERMS AGREEMENT


                                                                           , 199




Attention:

                 Subject in all respects to the terms and conditions of the
Selling Agency Agreement (the "Agreement") dated               , 1997, between
Salomon Brothers Inc,
         , and you, the undersigned agrees to purchase the following Notes of
CITGO Petroleum Corporation:


[Add additional terms as may be needed to identify Notes.]

[Specified Currency]:

Aggregate Principal Amount:                $

Interest Rate:

Date of Maturity:

Interest Payment Dates:

Regular Record Dates:

Discount or Commission:                         % of Principal Amount

Purchase Price:                   % of Principal Amount [plus

<PAGE>   36
                                                                             -2-



                                                 accrued interest from
                                                             , 199 ]

Purchase Date and Time:

Place for Delivery of Notes
and Payment Therefor:

Method of Payment:

Modification, if any, in
the requirements to
deliver the documents
specified in Section 6(b)
of the Agreement:

Period during which additional
Notes may not be sold pursuant
to Section 4(m) of the Agreement:



                                                   [Purchaser]


                                                   By:
                                                      -------------------------


Accepted:

CITGO Petroleum Corporation

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

<PAGE>   37
                                                                             -3-


                        [Form of Reverse Inquiry Letter]


                                                                    [Trade Date]

[Dealer]
[Address]
[Address]


Re:  $__,000,000 Medium-Term Notes
Pricing Supplement Number:________
Settlement Date:__________________
(See attached Term Sheet)


Dear [Dealer]:

Reference is made to the Selling Agency Agreement dated _______________, 199__
(the "Agreement") pertaining to up to $ ,000,000 aggregate principal amount of
Medium-Term Notes (the "Notes") to be offered from time to time by CITGO
Petroleum Corporation (the "Company").  The provisions of the Agreement (a copy
of which has been previously provided to you) are hereby incorporated by
reference and each of the representations and warranties set forth therein
shall be deemed to be made to you as of the date hereof.  Subject to the terms
set forth therein, the Company hereby appoints you as an Agent (as such term is
defined in the Agreement) of the Company for purposes of soliciting one offer
to purchase Notes from the Company containing the terms as set forth in the
above referenced Pricing Supplement.  This appointment is effective as to and
extends only to the one transaction which you are presenting to the Company
(see attached Term Sheet) and the Agreement shall automatically be terminated
as to you upon the earlier to occur of (i) payment made in full to the Company
for the Notes sold pursuant to the offer presented or (ii) the Company or you
determine not to proceed with the transaction.  Upon such termination of the
Agreement by the Company, neither you nor the Company shall have any liability
to the other except as provided in those sections of the Agreement referenced
in Section___ thereof.  You agree to be bound by, and
<PAGE>   38
                                                                             -4-


comply with, all of the provisions of the Agreement applicable to the Agents
thereunder.

*[As a condition precedent to your obligation to consummate the transaction
referred to above, you shall receive the following: (i) the opinions of
counsel, dated __________ [recent date or most recent periodic update [pursuant
to Sections ___ and ____ of the Agreement; (ii) an Officer's Certificate dated
_______ [recent date], pursuant to Section ___ of the Agreement; (iii) a letter
from [Accountant] dated ________ [most recent date or most recent periodic
update] delivered pursuant to Section ___ of the Agreement; and (iv) a copy of
the resolutions adopted by the Company with respect to the Form of Note
evidencing the securities described in the above referenced Pricing Supplement,
certified by an appropriate officer of the Company.]

This letter shall be governed by and construed in accordance with the laws of
the State of New York.

If the foregoing is in accordance with your understanding, please sign and
return to us two counterparts hereof, whereupon this letter shall constitute a
binding agreement between the Company and you in accordance with its terms.


                                                Very truly yours,



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


Agreed and Accepted as of the date hereof:

[Dealer]

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

<PAGE>   39
                                                                             -5-



*This language is to be negotiated between the Issuer and the Reverse Inquiry
Agent at the time of the trade.


<PAGE>   1
                                                                    Exhibit 99.2


UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN CERTIFICATED
FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A
NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY
OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE
TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.  UNLESS
THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY
TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT
FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED
IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.

                         CITGO PETROLEUM CORPORATION
         MEDIUM-TERM NOTE DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                                 (Fixed Rate)

<TABLE>
<S>                                          <C>
REGISTERED                                   CUSIP:

No.                                          PRINCIPAL AMOUNT: $

INTEREST RATE: %                             ORIGINAL ISSUE DATE:

MATURITY DATE:                               INTEREST PAYMENT DATES:

REDEEMABLE ON OR AFTER:                      REGULAR RECORD DATES:

OPTIONAL REPAYMENT DATE(S):                  OTHER PROVISIONS:
</TABLE>





      CITGO PETROLEUM CORPORATION, a Delaware corporation (herein called the
"Company," which term includes any successor corporation under the Indenture
referred to on the reverse hereof), for value received, hereby promises to pay
to

                                   Cede & Co.


or registered assigns, the principal sum of               DOLLARS ($           )
on the Maturity Date shown above, and to pay interest thereon at the rate per
annum shown above, computed on the basis of a 360-day year consisting of twelve
30-day months, until the principal hereof is paid or made available for
payment.  The Company will pay interest on each Interest Payment Date shown
above, commencing with the Interest Payment Date immediately following the
Original Issue Date shown above, and on the Maturity Date shown above.
Interest on this Note will accrue from the most recent date to which interest
has been paid or duly provided for or, if no interest has been paid or duly
provided for, from the Original Issue Date shown above.  The interest so
payable, and punctually paid or duly provided for, on any Interest Payment Date
will, as provided in such Indenture, be paid to the Person in whose name this
Note (or one or more Predecessor Notes) is registered at the close of business
on the Regular Record Date shown above (whether or not a
<PAGE>   2
                                                                             -2-

Business Day),  next preceding the related Interest Payment Date, provided that
interest payable on the Maturity Date shown above or upon repayment or
redemption shall be payable to the Person to whom the principal hereof is
payable.  In the event any Interest Payment Date or the Maturity Date is not a
Business Day, payment of principal, premium, if any, and interest with respect
to this Note will be paid on the next succeeding Business Day with the same
force and effect as if made on such date and no interest on such payment will
accrue from and after such date. Any such interest not so punctually paid or
duly provided for shall forthwith cease to be payable to the Holder on such
Regular Record Date and may either be paid to the Person in whose name this Note
(or one or more Predecessor Notes) is registered at the close of business on a
Special Record Date for the payment of such Defaulted Interest to be fixed by
the Trustee, notice whereof shall be given to the Holder of this Note not less
than 10 days prior to such Special Record Date, or be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange upon which the Notes of the series shown above may be listed, and upon
such notice as may be required by such exchange, all as more fully provided in
such Indenture.  Payment of the principal of and interest on this Note due on
the Maturity Date or upon repayment or redemption will be made in immediately
available funds upon presentation of the Note; provided that it is presented to
the Paying Agent in time for the Paying Agent to make such payment in such funds
in accordance with its normal procedures.  For the purposes of this Note,
"Business Day" means any day, other than a Saturday or Sunday, on which banks
are not required or authorized by law to close in  New York City.  Payment of
the principal of and interest on this Note will be made at the office or agency
of the Company maintained for that purpose in The City of New York, New York, in
such coin or currency of the United States of America as at the time of payment
is legal tender for payment of public and private debts; provided, however,
that, at the option of the Company, payment of interest (other than interest
payable on the Maturity Date or upon repayment or redemption) may be paid by
check mailed to the address of the Person entitled thereto as such address shall
appear in the Note Register at the close of business on the Regular Record Date.

      Reference is hereby made to the further provisions of this Note set forth
on the reverse hereof, which further provisions shall for all purposes have the
same effect as if set forth at this place.

      All terms not defined herein shall have the respective meanings ascribed
to them in the Indenture referred to herein.

      Unless the certificate of authentication hereon has been manually
executed by or on behalf of the Trustee under such Indenture, this Note shall
not be entitled to any benefits under such Indenture or be valid or obligatory
for any purpose.

<PAGE>   3
                                                                             -3-

      IN WITNESS WHEREOF, the Company has caused this Note to be duly executed.

                                        CITGO PETROLEUM CORPORATION
Dated:




                                        By 
                                           -------------------------------





                                        By 
                                           -------------------------------


                         CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein referred to in
the within-mentioned Indenture.

THE FIRST NATIONAL BANK OF CHICAGO,
as Trustee



By 
   --------------------------------
           Authorized Officer



<PAGE>   4
                                                                             -4-

                         CITGO PETROLEUM CORPORATION
         MEDIUM-TERM NOTE DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                                 (Fixed Rate)

      This Note is one of a duly authorized issue of Medium-Term Notes Due Nine
Months or More From Date of Issue (Fixed Rate) of the Company (herein called
the "Notes"), issued and to be issued under an indenture dated as of May 1,
1996 for senior debt securities, between the Company and The First National
Bank of Chicago, as trustee (herein called the "Trustee," which term includes
any successor trustee under the Indenture) (such Indenture herein called the
"Indenture"), to which Indenture and all indentures supplemental thereto
reference is hereby made for a statement of the respective rights, limitations
of rights, duties and immunities thereunder of the Company, the Trustee and the
Holders of the Notes and of the terms upon which the Notes are, and are to be,
authenticated and delivered. The Notes may bear different dates and mature at
different times, may bear interest at different rates and may otherwise vary,
all as provided in the Indenture.

      This Note may be subject to repayment at the option of the Holder hereof
on the Optional Repayment Date(s) indicated on the face hereof.  If no such
date is set forth on the face hereof, this Note may not be so repaid at the
option of the Holder hereof prior to maturity.  On each Optional Repayment
Date, if any, this Note shall be repayable in whole or in part in increments of
$1,000 (provided that any remaining principal hereof shall be at least $1,000)
at the option of the Holder hereof at a repayment price equal to 100% of the
principal amount to be repaid, together with interest thereon payable to the
date of repayment.  For this Note to be repaid in whole or in part at the
option of the Holder hereof, The First National Bank of Chicago, as Paying
Agent, at [                  ], New York, New York [     ] or at such other
address of which the Company shall from time to time notify the Holders of the
Notes, must receive not more than 45, nor less than 30, days prior to an
Optional Repayment Date, if any, either (i) this Note accompanied by the form
entitled "Option to Elect Repayment" below duly completed, or (ii) a telegram,
telex, facsimile transmission or letter from a member of a national securities
exchange or the National Association of Securities Dealers, Inc. or a
commercial bank or trust company in the United States of America setting forth
the name of the holder of the Note, the principal amount of the Note, the
principal amount of the Note to be repaid, the certificate number or a
description of the tenor and terms of the Note, a statement that the option to
elect repayment is being exercised thereby and a guarantee that the Note to be
repaid with the form entitled "Option to Elect Repayment" on the Note duly
completed will be received by the Paying Agent not later than five Business
Days after the date of such telegram, telex, facsimile transmission or letter
and such Note and form duly completed are received by the Paying Agent by such
fifth Business Day.  Exercise of such repaymenHolder hereof shall be
irrevocable.

      If so provided on the face of this Note, this Note may be redeemed by the
Company on and after the date so indicated on the face hereof.  If no date on
and after which this Note is redeemable is set forth on the face hereof, this
Note may not be redeemed prior to maturity.  On and after the date, if any,
from which this Note may be redeemed, this Note may be redeemed in whole or in
part in increments of $1,000 (provided that any remaining principal amount of
this Note shall be at least $1,000) at the option of the Company at a
redemption price equal to 100% of the principal amount to be redeemed, together
with interest thereon payable to the date of redemption, on notice given not
more than 60, nor less than 30, days prior to the date of redemption.  In the
event of redemption of this Note in part only, a new Note for the unredeemed
portion hereof shall be issued in the name of the Holder hereof upon surrender
hereof.  The Notes will not have a sinking fund.

<PAGE>   5
                                                                             -5-

      If an Event of Default with respect to the Notes shall occur and be
continuing, the principal of all the Notes may be declared due and payable in
the manner and with the effect provided in the Indenture.

      The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities of each series under
the Indenture to be affected at any time by the Company with the consent of the
Holders of a majority in principal amount of the Securities at the time
Outstanding of all series to be affected (acting as one class).  The Indenture
also contains provisions permitting the Holders of a majority in principal
amount of the Securities of each series at the time Outstanding, on behalf of
the Holders of all Securities of such series, to waive certain past defaults
under the Indenture and their consequences.  Any such consent or waiver by the
Holder of this Note shall be conclusive and binding upon such Holder and upon
all future Holders of this Note and of any Note issued upon the registration of
transfer hereof or in exchange herefor or in lieu hereof, whether or not
notation of such consent or waiver is made upon this Note.

      No reference herein to the Indenture and no provision of this Note or of
the Indenture shall alter or impair the obligation of the Company which is
absolute and unconditional to pay the principal of and interest on this Note at
the times, places and rate, and in the coin or currency herein and in the
Indenture prescribed.

      As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Note is registerable in the Security Register
of the Company, upon surrender of this Note for registration of transfer at the
office or agency of the Company in any place where the principal of and
interest on this Note are payable, duly endorsed by, or accompanied by a
written instrument of transfer in form satisfactory to the Company and the
Security Registrar duly executed by, the Holder hereof or his attorney duly
authorized in writing, and thereupon one or more new Notes of authorized
denominations and for the same aggregate principal amount will be issued to the
designated transferee or transferees.

      The Notes are issuable only in registered form without coupons in
denominations of $1,000 and any amount in excess thereof which is an integral
multiple of $1,000.  As provided in the Indenture and subject to certain
limitations therein set forth, the Notes are exchangeable for a like aggregate
principal amount of Notes of a different authorized denomination, as requested
by the Holder surrendering the same.

      No service charge shall be made for any such registration of transfer or
exchange, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

      Prior to due presentment of this Note for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Note is registered as the owner hereof for all
purposes, whether or not this Note be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

      This Note shall be construed in accordance with and governed by the laws
of the State of New York.
<PAGE>   6
                                                                             -6-

                         -----------------------------
                                 ABBREVIATIONS

      The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

                TEN COM -- as tenants in common

                TEN ENT -- as tenants by the entireties

                 JT ENT -- as joint tenants and not as tenants in common

                UNIF GIFT MIN ACT..........Custodian...............
                                   (Cust)               (Minor)

                                 under Uniform Gift to Minors Act

                                 ..................................
                                               (State)

     Additional abbreviations may be used though not in the above list.


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

    FOR VALUE RECEIVED the undersigned hereby sells, assigns and transfers unto 
PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE

- -------------------------------------------------------------------------------
(Name and address of assignee, including zip code, must be printed or 
typewritten)

- -------------------------------------------------------------------------------
the within Note, and all rights thereunder, hereby irrevocably constituting and
appointing

- -------------------------------------------------------------------------------
to transfer said Note on the books of the within Company, with full power of
substitution in the premises.

Dated:
      -----------------------------------    ----------------------------------
                                        
                                             ----------------------------------

      NOTICE:  The signature to this assignment must correspond with the name as
written upon the face of the within Note in every particular, without
alteration or enlargement or any change whatever and must be guaranteed by an
eligible guarantor institution (banks, stockbrokers, savings and loan
associations and credit unions with membership in an approved signature
guarantee medallion program), pursuant to SEC Rule 17 Ad-15.

<PAGE>   7
                                                                             -7-

                           OPTION TO ELECT REPAYMENT

      The undersigned hereby irrevocably request(s) and instruct(s) the Company
to repay the within Note (or portion thereof specified below) pursuant to its
terms at a price equal to the principal amount thereof, together with interest
to the repayment date, to the undersigned, at

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

- -------------------------------------------------------------------------------
        (Please print or typewrite name and address of the undersigned)

      For this Note to be repaid the Paying Agent must receive at [           ],
New York, New York [     ], or at such other place or places of which the
Company shall from time to time notify the Holder of the within Note, not more
than 45, nor less than 30, days prior to an Optional Repayment Date, if any,
shown on the face of the within Note, either (i) this Note with this "Option to
Elect Repayment" form duly completed, or (ii) a telegram, telex, facsimile
transmission or letter from a member of a national securities exchange or the
National Association of Securities Dealers, Inc. or a commercial bank or trust
company in the United States of America setting forth the name of the holder of
the Note, the principal amount of the Note, the principal amount of the Note to
be repaid, the certificate number or a description of the tenor and terms of the
Note, a statement that the option to elect repayment is being exercised thereby
and a guarantee that the Note to be repaid with the form entitled "Option to
Elect Repayment" on the Note duly completed will be received by the Paying Agent
not later than five Business Days after the date of such telegram, telex,
facsimile transmission or letter and such Note and form duly completed are
received by the Paying Agent by such fifth Business Day.

      If less than the entire principal amount of the within Note is to be
repaid, specify the portion thereof (which shall be increments of $1,000) which
the Holder elects to have repaid:  $_____________ and specify the denomination
or denominations (which shall be $1,000 or an integral multiple of $1,000 in
excess thereof) of the Notes to be issued to the Holder for the portion of the
within Note not being repaid (in the absence of any such specification, one
such Note will be issued for the portion not being repaid): $__________________.

Dated:
      ---------------------------       --------------------------------------

                                        Note:  The signature on this Option to
                                        Elect Repayment must correspond with the
                                        name as written upon the face of this
                                        Note in every particular without
                                        alteration or enlargement.



<PAGE>   1
                                                                    Exhibit 99.3



UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN CERTIFICATED
FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A
NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY
OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE
TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.  UNLESS
THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY
TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT
FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED
IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.

                          CITGO PETROLEUM CORPORATION
          MEDIUM-TERM NOTE DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                                (Floating Rate)



REGISTERED                                       CUSIP:

No.                                              PRINCIPAL AMOUNT: $

                                                 MATURITY DATE:

ORIGINAL ISSUE DATE:                             SPREAD:

INITIAL INTEREST RATE:                           SPREAD MULTIPLIER:

INDEX MATURITY:                                  INTEREST PAYMENT PERIOD:


INTEREST RATE BASIS:                             INTEREST RATE RESET PERIOD:


MAXIMUM INTEREST RATE:                           CALCULATION AGENT:

MINIMUM INTEREST RATE:                           OPTIONAL REPAYMENT:

INTEREST RESET DATES:                            OTHER PROVISIONS:

INTEREST PAYMENT DATES:

REDEEMABLE ON OR AFTER:
      DATE(S):




      CITGO PETROLEUM CORPORATION, a Delaware corporation (herein called the
"Company", which term includes any successor corporation under the Indenture
referred to on the reverse hereof), for value received, hereby promises to pay
to

<PAGE>   2
                                                                             -2-

                                   Cede & Co.

or registered assigns, the principal sum of                             DOLLARS
($          ) on the Maturity Date shown above, and to pay interest thereon from
the most recent Interest Payment Date to which interest has been paid or duly
provided for or, if no interest has been paid or duly provided for, from the
Original Issue Date shown above at the rate per annum determined in accordance
with the provisions herein relating to the Interest Rate Basis specified above
on each Interest Payment Date specified above, until the principal hereof is
paid or made available for payment.  The interest so payable, and punctually
paid or duly provided for, on any Interest Payment Date will, as provided in
such Indenture, be paid to the Person in whose name this Note (or one or more
Predecessor Notes) is registered at the close of business on the Regular Record
Date for such interest, which shall be the fifteenth calendar day (whether or
not a Business Day), next preceding such Interest Payment Date, provided that
interest payable on the Maturity Date shown above or upon repayment or
redemption shall be payable to the Person to whom the principal hereof is
payable.  Any such interest not so punctually paid or duly provided for shall
forthwith cease to be payable to the Holder on such Regular Record Date and may
either be paid to the Person in whose name this Note (or one or more Predecessor
Notes) is registered on a Special Record Date for the payment of such Defaulted
Interest to be fixed by the Trustee, notice whereof shall be given to the Holder
of this Note not less than 10 days prior to such Special Record Date, or be paid
at any time in any other lawful manner not inconsistent with the requirements of
any securities exchange upon which the Notes of the series shown above may be
listed, and upon such notice as may be required by such exchange, all as more
fully provided in such Indenture. Payment of the principal of and interest on
this Note due on the Maturity Date or upon repayment or redemption will be made
in immediately available funds against presentation of the Note; provided that
it is presented to the Paying Agent in time for the Paying Agent to make such
payment in such funds in accordance with its normal procedures.  Payment of the
principal and interest on this Note will be made at the office or agency of the
Company maintained for that purpose in The City of New York, New York, in such
coin or currency of the United States of America as at the time of payment is
legal tender for payment of public and private debts; provided, however, that,
at the option of the Company, payment of interest (other than interest payable
on the Maturity Date or upon repayment or redemption) may be paid by check
mailed to the address of the Person entitled thereto as it appears in the Note
Register at the close of business on the Regular Record Date corresponding to
the relevant Interest Payment Date.

      Reference is made to the further provisions of this Note set forth on the
reverse hereof, which further provisions shall for all purposes have the same
effect as if set forth at this place.

      All terms not defined herein shall have the respective meanings ascribed
to them in the Indenture referred to herein.

      Unless the certificate of authentication hereon has been manually
executed by or on behalf of the Trustee under such Indenture, this Note shall
not be entitled to any benefits under such Indenture or be valid or obligatory
for any purpose.
<PAGE>   3
                                                                             -3-


      IN WITNESS WHEREOF, the Company has caused this Note to be duly executed.

                                       CITGO PETROLEUM CORPORATION
Dated:




                                       By                               
                                          ------------------------------





                                       By                               
                                          ------------------------------



                        CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein referred to in 
the within-mentioned Indenture.

THE FIRST NATIONAL BANK OF CHICAGO,
as Trustee



By                               
   ------------------------------
           Authorized Officer



<PAGE>   4
                                                                             -4-



                         CITGO PETROLEUM CORPORATION
         MEDIUM-TERM NOTE DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                               (FLOATING RATE)

      This Note is one of a duly authorized issue of Medium-Term Notes Due Nine
Months or More From Date of Issue (Floating Rate) of the Company (herein called
the "Notes"), issued and to be issued under an indenture dated as of May 1,
1996 for senior debt securities, between the Company and The First National
Bank of Chicago, as trustee (herein called the "Trustee," which term includes
any successor trustee under the Indenture) (such Indenture herein called the
"Indenture"), to which Indenture and all indentures supplemental thereto
reference is hereby made for a statement of the respective rights, limitations
of rights, duties and immunities thereunder of the Company, the Trustee and the
Holders of the Notes and of the terms upon which the Notes are, and are to be,
authenticated and delivered. The Notes may bear different dates and mature at
different times, may bear interest at different rates and may otherwise vary,
all as provided in the Indenture.

      Commencing with the Interest Reset Date specified on the face hereof
first following the Original Issue Date specified on the face hereof, the rate
at which interest on this Note is payable shall be adjusted daily, weekly,
monthly, quarterly, semi-annually or annually as shown on the face hereof under
the Interest Rate Reset Period; provided, however, that the interest rate in
effect for the period from the Original Issue Date to the first Interest Reset
Date will be the Initial Interest Rate specified on the face hereof.  Each such
adjusted rate shall be applicable on and after the Interest Reset Date to which
it relates, to, but not including, the next succeeding Interest Reset Date, or
until the Maturity Date, as the case may be.  If any Interest Reset Date would
otherwise be a day that is not a Business Day, such Interest Reset Date shall
be postponed to the next day that is a Business Day, except that if the
Interest Rate Basis specified on the face hereof is LIBOR, and if such Business
Day is in the next succeeding calendar month, such Interest Reset Date shall be
the immediately preceding Business Day. Subject to applicable provisions of law
and except as specified herein, on each Interest Reset Date the rate of
interest on this Note shall be the rate determined in accordance with the
provisions of the applicable heading below.

      All percentages resulting from any calculation on the Notes will be
rounded, if necessary, to the nearest one hundred-thousandth of a percentage
point, with five one-millionths of a percentage point rounded upward (e.g.,
9.876545% or .09876545) being rounded to 9.87655% (or .0987655) and 9.876544%
(or .09876544) being rounded to 9.87654% or (.0987654), and all dollar amounts
used in or resulting from such calculation will be rounded to the nearest cent
(with one-half cent being rounded upward).

DETERMINATION OF COMMERCIAL PAPER RATE

      If the Interest Rate Basis specified on the face hereof is the Commercial
Paper Rate, the interest rate with respect to this Note for any Interest Reset
Date shall be the Commercial Paper Rate plus or minus the Spread, if any,
and/or multiplied by the Spread Multiplier, if any, as specified on the face
hereof, as determined on the applicable Interest Determination Date.

      "Commercial Paper Rate" means, with respect to any Interest Determination
Date, the Money Market Yield (calculated as described below) of the rate on
that date for

<PAGE>   5
                                                                             -5-

commercial paper having the Index Maturity specified on the face hereof as such
rate is published by the Board of Governors of the Federal Reserve System in
"Statistical Release H.15(519), Selected Interest Rates", or any successor
publication of the Board of Governors of the Federal Reserve System
("H.15(519)"), under the heading "Commercial Paper-Non-financial".  In the
event that such rate is not published by 3:00 p.m., New York City time, on the
Calculation Date (as defined below) pertaining to such Interest Determination
Date then the Commercial Paper Rate shall be the Money Market Yield of the rate
on that Interest Determination Date for commercial paper having such Index
Maturity as published by the Federal Reserve Bank of New York in its daily
statistical release, "Composite 3:30 p.m. Quotations for U.S. Government
Securities" ("Composite Quotations") under the heading "Commercial Paper".  If
by 3:00 p.m., New York City time, on such Calculation Date such rate is not yet
published in H.15(519) or Composite Quotations, the Commercial Paper Rate for
that Interest Determination Date shall be calculated by the Calculation Agent
appointed by the Company and shall be the Money Market Yield of the arithmetic
mean (as rounded upwards, if necessary, to the next higher one
hundred-thousandth of a percentage point) of the offered rates of three leading
dealers of commercial paper in The City of New York selected by the Calculation
Agent as of 11:00 a.m., New York City time, on that Interest Determination Date,
for commercial paper having such Index Maturity placed for an industrial issuer
whose bond rating is "AA" or the equivalent from a nationally recognized
securities rating agency; provided, however, that if the dealers selected as
aforesaid by the Calculation Agent are not quoting as mentioned in this
sentence, the Commercial Paper Rate with respect to such Interest Determination
Date will be the Commercial Paper Rate in effect on such Interest Determination
Date.

      "Money Market Yield" shall be a yield calculated in accordance with the
following formula:


              Money Market Yield =   D x 360 x 100
                                     -------------
                                     360 - (D x M)


where "D" refers to the per annum rate for the commercial paper, quoted on a
bank discount basis and expressed as a decimal, and "M" refers to the actual
number of days in the interest period for which interest is being calculated.

DETERMINATION OF FEDERAL FUNDS RATE

      If the Interest Rate Basis specified on the face hereof is the Federal
Funds Rate, the interest rate with respect to this Note for any Interest Reset
Date shall be the Federal Funds Rate plus or minus the Spread, if any, and/or
multiplied by the Spread Multiplier, if any, as specified on the face hereof,
as determined on the applicable Interest Determination Date.

      "Federal Funds Rate" means, with respect to any Interest Determination
Date, the rate on that day for Federal Funds as published in H.15(519) under the
heading "Federal Funds (Effective)" or, if not so published by 3:00 p.m., New
York City time, on the Calculation Date pertaining to such Interest
Determination Date, the Federal Funds Rate will be the rate on such Interest
Determination Date as published in Composite Quotations under the heading
"Federal Funds/Effective Rate".  If such rate is not yet published by 3:00 p.m.,
New York City time, on the 

<PAGE>   6
                                                                             -6-

Calculation Date pertaining to such Interest Determination Date, in either H.15
(519) or Composite Quotations, the Federal Funds Rate for such Interest
Determination Date shall be the rate on such Interest Determination Date made
publicly available by the Federal Reserve Bank of New York which is equivalent
to the rate which appears in H.15(519) under the heading "Federal Funds
(Effective)"; provided, however, that if such rate is not made publicly
available by the Federal Reserve Bank of New York by 3:00 p.m. New York City
time on such Calculation Date, the Federal Funds Rate will be the Federal Funds
Rate in effect on such Interest Determination Date.

DETERMINATION OF CD RATE

      If the Interest Rate Basis specified on the face hereof is the CD Rate,
the interest rate with respect to this Note for any Interest Reset Date shall
be the CD Rate plus or minus the Spread, if any, and/or multiplied by the
Spread Multiplier, if any, as specified on the face hereof, as determined on
the applicable Interest Determination Date.

  "CD Rate" means, with respect to any Interest Determination Date, the rate on
such date for negotiable certificates of deposit having the Index Maturity
designated on the face hereof as published in H.15(519) under the heading "CDs
(Secondary Market)", or, if not so published by 3:00 p.m., New York City time,
on the Calculation Date pertaining to such Interest Determination Date, the CD
Rate will be the rate on such Interest Determination Date for negotiable
certificates of deposit of the Index Maturity designated on the face hereof as
published in Composite Quotations under the heading "Certificates of Deposit."
If such rate is not yet published in either H.15(519) or the Composite
Quotations by 3:00 P.M., New York City time, on the Calculation Date pertaining
to such Interest Determination Date, the CD Rate on such Interest Determination
Date will be calculated by the Calculation Agent and will be the arithmetic
mean of the secondary market offered rates as of 10:00 a.m., New York City
time, on such Interest Determination Date of three leading nonbank dealers in
negotiable U.S. dollar certificates of deposit in The City of New York selected
by the Calculation Agent for negotiable certificates of deposit of major United
States money center banks of the highest credit standing in the market for
negotiable certificates of deposit with a remaining maturity closest to the
Index Maturity designated on the face hereof in the denomination of $5,000,000;
provided, however, that if the dealers selected as aforesaid by the Calculation
Agent are not quoting as set forth above, the CD Rate will be the CD Rate in
effect on such Interest Determination D Rate

DETERMINATION OF CMT RATE

      If the Interest Rate Basis specified on the face hereof is the CMT Rate,
the interest rate with respect to this Note for any Interest Reset Date shall
be the CMT Rate plus or minus the Spread, if any, and/or multiplied by the
Spread Multiplier, if any, as specified on the face hereof, as determined on
the applicable Interest Determination Date.

  "CMT Rate" means, with respect to any Interest Determination Date, the rate
displayed on the Designated CMT Telerate page (as defined below) under the
caption "...Treasury Constant Maturities...Federal Reserve Board Release
H.15...Mondays Approximately 3:45 P.M.," under the column for the DESIGNATED
CMT Maturity Index (as defined below) for (i) if the Designated CMT Telerate
Page is 7055, the rate on such Interest Determination Date and (ii) if the
Designated CMT Telerate Page is


<PAGE>   7

                                                                             -7-

7052, the week or the month, as specified on the face hereof, ended immediately
preceding the week in which the related Interest Determination Date occurs.  If
such rate is no longer displayed on the relevant page, or if not displayed by
3:00 p.m., New York City time, on the related Calculation Date, then the CMT
Rate for such Interest Determination Date will be such Treasury Constant
Maturity rate for the Designated CMT Maturity Index as published in the
relevant H.15(519).  If such rate is no longer published, or, if not published
by 3:00 p.m., New York City time, on the related Calculation Date, then the CMT
Rate for such Interest Determination Date will be such Treasury Constant
Maturity rate for the Designated CMT Maturity Index (or other United States
Treasury rate for the Designated CMT Maturity Index) for the Interest
Determination Date with respect to such Interest Reset Date as may then be
published by either the Board of Governors of the Federal Reserve System or the
United States Department of the Treasury that the Calculation Agent determines
to be comparable to the rate formerly displayed on the Designated CMT Telerate
Page and published in the relevant H.15(519).  If such information is not
provided by 3:00 p.m., New York City time, on the related Calculation Date,
then the CMT Rate for the Interest Determination Date will be calculated by the
Calculation Agent and will be a yield to maturity, based on the arithmetic mean
of the secondary market closing offer side prices as of approximately 3:30
p.m., New York City time on the Interest Determination Date reported, according
to their written records, by three leading primary United States government
securities dealers (each, a "Reference Dealer") in The City of New York
selected by the Calculation Agent (from five such Reference Dealers selected by
the Calculation Agent, after consultation with the Company, and eliminating the
highest quotation (or, in the event of equality, one of the highest) uotation
(or, in the event of equality, one of the lowest)), for the most recently
issued direct noncallable fixed rate obligations of the United States
("Treasury notes") with an original maturity of approximately the Designated
CMT Maturity Index and a remaining term to maturity of not less than such
Designated CMT Maturity Index minus one year.  If the Calculation Agent cannot
obtain three such Treasury notes quotations, the CMT Rate for such Interest
Determination Date will be calculated by the Calculation Agent and will be a
yield to maturity based on the arithmetic mean of the secondary market offer
side prices as of approximately 3:30 p.m., New York City time, on the Interest
Determination Date of three Reference Dealers in The City of New York (from
five such Reference Dealers selected by the Calculation Agent and eliminating
the highest quotation (or, in the event of equality, one of the highest) and
the lowest quotation (or, in the event of equality, one of the lowest)), for
Treasury notes with an original maturity of the number of years that is the
next highest to the Designated CMT Maturity Index and a remaining term to
maturity closest to the Designated CMT Maturity Index and in an amount of at
least $100,000,000.  If three or four (and not five) of such Reference Dealers
are quoting as described above, then the CMT Rate will be based on the
arithmetic mean of the offer prices obtained and neither the highest nor the
lowest of such quotes will be eliminated; provided, however, that if fewer than
three Reference Dealers selected by the Calculation Agent are quoting as
described herein, the CMT Rate will be the CMT Rate in effect on such Interest
Determination Date.  If two Treasury notes with an original maturity as
described in the second preceding sentence have remaining terms to maturity
equally close to the Designated CMT Maturity Index, the quotes for the Treasury
note with the shorter remaining term to maturity will be used.

  "Designated CMT Telerate Page" means thelerate Service on the page designated
on the face hereof (or any other page as may replace such page on that service
for the purpose of displaying Treasury
<PAGE>   8
                                                                             -8-

Constant Maturities as reported in H.15(519)), for the purpose of displaying
Treasury Constant Maturities as reported in H.15(519).  If no such page is
specified on the face hereof, the Designated CMT Telerate Page shall be 7052,
for the most recent week.

  "Designated CMT Maturity Index" shall be the original period to maturity of
the U.S. Treasury securities (either 1, 2, 3, 5, 7, 10, 20 or 30 years)
specified on the face hereof with respect to which the CMT Rate will be
calculated.  If no such maturity is specified on the face hereof, the
Designated CMT Maturity Index shall be 2 years.

DETERMINATION OF LIBOR

    If the Interest Rate Basis specified on the face hereof is LIBOR, the
interest rate with respect to this Note for any Interest Reset Date shall be
LIBOR plus or minus the Spread, if any, or multiplied by the Spread Multiplier,
if any, as specified on the face hereof, as determined on the applicable
Interest Determination Date.

  "LIBOR" will be determined by the Calculation Agent in accordance with the
following provisions:

    (i) With respect to an Interest Determination Date, LIBOR will be either: 
(a) if "LIBOR Reuters" is specified on the face hereof, the arithmetic mean of
the offered rates (unless the specified Designated LIBOR Page (as defined
below) by its terms provides only for a single rate, in which case such single
rate shall be used) for deposits in the Index Currency having the Index
Maturity designated on the face hereof, commencing on the Interest Reset Date,
that appear on the Designated LIBOR Page as of 11:00 a.m., London time, on that
Interest Determination Date, if at least two such offered rates appear (unless,
as aforesaid, only a single rate is required) on such Designated LIBOR Page, or
(b) if "LIBOR Telerate" is specified on the face hereof, the rate for deposits
in the Index Currency having the Index Maturity designated on the face hereof,
commencing on the Interest Reset Date, that appears on the Designated LIBOR
Page as of 11:00 a.m., London time, on the Interest Determination Date.  If
fewer than two offered rates appear, or no rate appears, as applicable, LIBOR
in respect of the related Interest Determination Date will be determined as if
the parties had specified the rate described in clause (ii) below.

    (ii) With respect to an Interest Determination Date on which LIBOR is to be
calculated pursuant to this clause (ii), the Calculation Agent will request the
principal London offices of each of four major reference banks in the London
interbank market, as selected by the Calculation Agent (after consultation with
the Company), to provide the Calculation Agent with its offered quotation for
deposits in the Index Currency for the period of the Index Maturity designated
on the face hereof, commencing on the Interest Reset Date, to prime banks in
the London interbank market at approximately 11:00 a.m., London time, on such
Interest Determination Date and in a principal amount that ransaction in such
Index Currency in such market at such time.  If at least two such quotations
are provided, LIBOR determined on such Interest Determination Date will be the
arithmetic mean of such quotations.  If fewer than two such quotations are
provided, LIBOR determined on such Interest Determination Date will be the
arithmetic mean of the rates quoted at approximately 11:00 a.m. (or such other
time if specified on the face hereof), in the applicable Principal Financial
Center for the country of the Index Currency on such Interest Determination
Date, by three
<PAGE>   9
                                                                             -9-

major banks in such Principal Financial Center selected by the Calculation
Agent (after consultation with the Company) for loans in the Index Currency to
leading European banks, having the Index Maturity designated on the face hereof
and in a principal amount that is representative for a single transaction in
such Index Currency in such market at such time: provided, however, that if the
banks so selected by the Calculation Agent are not quoting as mentioned in this
sentence, LIBOR with respect to such Interest Determination Date will be LIBOR
in effect on such Interest Determination Date.

  "Index Currency" means the currency (including composite currencies)
specified on the face hereof as the currency for which LIBOR shall be
calculated.  If no such currency is specified on the face hereof, the Index
Currency shall be U.S.  dollars.

  "Designated LIBOR Page" means either (a) if "LIBOR Reuters" is designated on
the face hereof, the display on the Reuters Monitor Money Rates Service for the
purpose of displaying the London interbank rates of major banks for the
applicable Index Currency, or (b) if "LIBOR Telerate" is designated on the face
hereof, the display on the Dow Jones Telerate Service for the purpose of
displaying the London interbank rates of major banks for the applicable Index
Currency.  If neither LIBOR Reuters nor LIBOR Telerate is specified on the face
hereof, LIBOR for the applicable Index Curreate (and, if the U.S. dollar is the
Index Currency, Page 3750) had been specified.

  "London Banking Day" means any day on which dealings in deposits in the Index
Currency are transacted in the London interbank market.

  "Principal Financial Center" means the capital city of the country issuing
the Index Currency, except that with respect to U.S. dollars, Deutsche marks,
Italian lira, Swiss francs, Dutch guilders and ECUs, the Principal Financial
Center shall be the City of New York, Frankfurt, Milan, Zurich, Amsterdam and
Brussels, respectively.

Determination of Prime Rate

     If the Interest Rate Basis specified on the face hereof is the Prime Rate,
the interest rate with respect to this Note for any Interest Reset Date shall
be the Prime Rate plus or minus the Spread, if any, and/or multiplied by the
Spread Multiplier, if any, as specified on the face hereof, as determined on
the applicable Interest Determination Date.

  "Prime Rate" means, with respect to any Interest Determination Date, the rate
set forth in H.15(519) for such date opposite the caption "Bank Prime Loan."
If such rate is not yet published by 9:00 a.m., New York City time, on the
Calculation Date pertaining to such Interest Determination Date, the Prime Rate
for such Interest Determination Date will be the arithmetic mean of the rates
of interest publicly announced by each bank that appears on the Reuters Screen
USPRIME1 (as defined below) as such bank's prime rate or base lending rate as
in effect for such Interest Determination Date.  If fewer than four such rates,
but more than one such rate, appear on the Reuters Screen USPRIME1 for such
Interest Determination Date, the rate shall be the arithmetic mean of the prime
rates quoted on the basis of the actual number of days in the year divided by
360 as of the close of business on such Interest Determination Date by at least
two major money center banks in The City of New York selected by the
Calculation Agent (after consultation with the Company).  If fewer than two
such rates appear on the Reuters Screen USPRIME1, the
<PAGE>   10
Prime Rate shall be calculated by the Calculation Agent as of the close of
business on the Interest Determination Date on the basis of the prime rates, as
of the close of business on the Interest Determination Date, furnished in The
City of New York by three substitute banks or trust companies organized and
doing business under the laws of the United States, or any State thereof, in
each case having total equity capital of at least U.S. $500 million and being
subject to supervision or examination by fedalculation Agent  (after
consultation with the Company) to provide such rate or rates; provided,
however, that if the banks or trust companies selected as aforesaid by the
Calculation Agent are not quoting as set forth above, the Prime Rate will be
the Prime Rate in effect on such Interest Determination Date.  "Reuters Screen
USPRIME1" means the display designated as Page "USPRIME1" on the Reuters
Monitor Money Rates Services (or such other page as may replace the USPRIME1
Page on that service for the purpose of displaying prime rates or base lending
rates of major United States banks).

Determination of Treasury Rate

     If the Interest Rate Basis specified on the face hereof is the Treasury 
Rate, the interest rate with respect to this Note for any Interest Reset Date
shall be the Treasury Rate plus or minus the Spread, if any, and/or multiplied
by the Spread Multiplier, if any, as specified on the face hereof, as
determined on the applicable Interest Determination Date.

  "Treasury Rate" means, with respect to any Interest Determination Date,
therate applicable to the auction held on such date of direct obligations of
the United States ("Treasury bills") having the Index Maturity specified on the
face hereof as published in H.15(519) under the heading "Treasury bills --
auction average (investment)" or, if not so published by 9:00 a.m., New York
City time, on the Calculation Date pertaining to such Interest Determination
Date, the auction average rate (expressed as a bond equivalent, on the basis of
a year of 365 or 366 days, as applicable, and applied on a daily basis) as
otherwise announced by the United States Department of the Treasury.  In the
event that the results of the auction of Treasury bills having the Index
Maturity specified on the face hereof are not published or otherwise reported
as provided above by 3:00 p.m., New York City time, on such Calculation Date or
no such auction is held on such Interest Determination Date, then the Treasury
Rate shall be calculated by the Calculation Agent and shall be a yield to
maturity (expressed as a bond equivalent, on the basis of a year of 365 or 366
days, as applicable, and applied on a daily basis) of the arithmetic mean of
the secondary market bid rates, as of approximately 3:30 p.m., New York City
time, on such Interest Determination Date, of three leading primary United
States government securities dealers selected by the Calculation Agent (after
consultation with the Company) for the issue of Treasury bills with a remaining
maturity closest to the Index Maturity specified on the face hereof; provided,
however, that if the dealers selected as aforesaid by the Calculation Agent are
not quoting as mentioned in this sentence, the Treasury Rate with respect to
such Interest Determination Date will be the Treasury Rate in effect on such
Interest Determination Date.

General

     Notwithstanding the determination of the interest rate as provided above, 
the interest rate on this Note for any interest period shall not be greater
than the Maximum Interest Rate, if any, or less than the Minimum Interest Rate,
if any, specified on the face hereof.  The interest rate on this Note will in
no event be

<PAGE>   11
                                                                            -11-

higher than the maximum rate permitted by New York law as the same may be
modified by United States law of general application.

     The Calculation Agent shall calculate the interest rate on this Note in
accordance with the foregoing on or before the Calculation Date.  The Company
will notify the Trustee and any Paying Agent of each determination of the
interest rate applicable to this Note promptly after such determination is made
by the Calculation Agent.  The Trustee and any Paying Agent will, upon the
request of the Holder of this Note, provide the interest rate then in effect
and, if different, the interest rate which will become effective as a result of
a determination made with respect to the most recent Interest Determination
Date with respect to this Note.  The Trustee and any Paying Agent will not be
responsible for determining the interest rate applicable to this Note.

     If any Interest Payment Date specified on the face hereof would otherwise 
be a day that is not a Business Day, such Interest Payment Date shall be
postponed to the next day that is a Business Day, except that if the Interest
Rate Basis specified on the face hereof is LIBOR, and if any such Business Day
is in the next succeeding calendar month, such Interest Payment Date shall be
the immediately preceding Business Day.  If the Maturity Date falls on a day
which is not a Business Day, payment of principal, premium, if any, and
interest with respect to this Note will be paid on the next succeeding Business
Day with the same force and effect as if made on such date and no interest will
accrue from and after such date.  "Business Day" means any day, other than a
Saturday or Sunday, that is (i) not a legal holiday or a day on which banking
institutions are authorized or required by law, regulation or executive order
to be closed in New York City, (ii) with respect to Notes denominated in a
foreign currency, not a day on which banks are authorized or required by law to
close in the capital city of the country issuing such currency, (iii) with
respect to Notes denominated in ECU, not a day on which banks are authorized or
required by law to close in Brussels, Belgium, (iv) with respect to Notes
denominated in another composite currency, not a day on which banks are
authorized or required by law to close in the city specified on the face
hereof, and (v) with respect to LIBOR Notes, a London Banking Day.

     If the Interest Rate Basis specified on the face hereof is the Commercial
Paper Rate, the Federal Funds Rate, the CD Rate, the CMT Rate or the Prime
Rate, the Interest Determination Date pertaining to an Interest Reset Date will
be the second Business Day prior to such Interest Reset Date.  If the Interest
Rate Basis specified on the face hereof is LIBOR, the Interest Determination
Date pertaining to an Interest Reset Date will be the second London Banking Day
next preceding such Interest Reset Date.  If the Interest Rate Basis specified
on the face hereof is the Treasury Rate, the Interest Determination Date
pertaining to an Interest Reset Date will be the day of the week in which such
Interest Reset Date falls on which Treasury bills would normally be auctioned
(generally, Monday).  If as the result of a legal holiday, an auction is held
on the preceding Friday, such Friday will be the Interest Determination Date
pertaining to the Interest Reset Date occurring in the next succeeding week.
If an auction date shall fall on any Interest Reset Date for the Note, then
such Interest Reset Date shall instead be the first Business Day immediately
following such auction date.

     The "Calculation Date", where applicable, pertaining to an Interest
Determination Date is the earlier of (i) the tenth calendar day after such
Interest Determination Date or if any such day is not a Business Day, the next
succeeding Business Day, or (ii) the Business Day preceding the applicable
Interest Payment
<PAGE>   12
                                                                            -12-

Date or the Maturity Date or the date of repayment or redemption, as the case
may be.

     Interest payments on this Note on an Interest Payment Date shall include
accrued interest from and including the next preceding Interest Payment Date in
respect of which interest has been paid or duly provided for (or from and
including the date of issue if no interest has been paid) to, but excluding,
such Interest Payment Date or the Maturity Date or the date of repayment or
redemption, as the case may be.  Accrued interest will be calculated by
multiplying the principal amount of this Note by an accrued interest factor.
The accrued interest factor will be computed by adding together the interest
factors calculated for each day in the period for which accrued interest is
being calculated.  The interest factor for each such day will be computed by
dividing the interest rate applicable to such day by 360 if the Interest Rate
Basis is the Commercial Paper Rate, LIBOR, CD Rate, Federal Funds Rate or Prime
Rate, or by the actual number of days in the year if the Interest Rate Basis is
the CMT Rate or Treasury Rate.

     This Note may be subject to repayment at the option of the Holder hereof on
the Optional Repayment Date(s) indicated on the face hereof.  If no such date
is set forth on the face hereof, this Note may not be so repaid at the option
of the Holder hereof prior to maturity.  On each Optional Repayment Date, if
any, this Note shall be repayable in whole or in part in increments of $1,000
(provided that any remaining principal hereof shall be at least $1,000) at the
option of the Holder hereof at a repayment price equal to 100% of the principal
amount to be repaid, together with interest thereon payable to the date of
repayment.  For this Note to be repaid in whole or in part at the option of the
Holder hereof, The First National Bank of Chicago, as Paying Agent, at [      ]
New York, New York [      ], or at such other address of which the Company
shall from time to time notify the Holders of the Notes, must receive not more
than 45, nor less than 30, days prior to an Optional Repayment Date, if any,
either (i) this Note accompanied by the form entitled "Option to Elect
Repayment" below duly completed, or (ii) a telegram, telex, facsimile
transmission or letter from a member of a national securities exchange or the
National Association of Securities Dealers, Inc. or a commercial bank or trust
company in the United States of America setting forth the name of the holder of
the Note, the principal amount of the Note, the principal amount of the Note to
be repaid, the certificate number or a description of the tenor and terms of
the Note, a statement that the option to elect repayment is being exercised
thereby and a guarantee that the Note to be repaid with the form entitled
"Option to Elect Repayment" on the Note duly completed will be received by the
Paying Agent not later than five Business Days after the date of such telegram,
telex, facsimile transmission or letter and such Note and form duly completed
are received by the Paying Agent by such fifth Business Day.  Exercise of such
repayment option by the Holder hereof shall be irrevocable.

     If so provided on the face of this Note, this Note may be redeemed by the
Company on and after the date so indicated on the face hereof.  If no date on
and after which this Note is redeemable is set forth on the face hereof, this
Note may not be redeemed prior to maturity.  On and after the date, if any,
from which this Note may be redeemed, this Note may be redeemed in whole or in
part in increments of $1,000 (provided that any remaining principal amount of
this Note shall be at least $1,000) at the option of the Company at a
redemption price equal to 100% of the principal amount to be redeemed, together
with interest thereon payable to the date of redemption, on notice given not
more than 60, nor less than 30, days prior
<PAGE>   13
                                                                            -13-

to the date of redemption.  In the event of redemption of this Note in part
only, a new Note for the unredeemed portion hereof shall be issued in the name
of the Holder hereof upon surrender hereof.  The Notes will not have a sinking
fund.

     If an Event of Default with respect to the Notes shall occur and be
continuing, the principal of all the Notes may be declared due and payable in
the manner and with the effect provided in the Indenture.

     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities of each series under
the Indenture to be affected at any time by the Company with the consent of the
Holders of a majority in principal amount of the Securities at the time
Outstanding of all series to be affected (acting as one class).  The Indenture
also contains provisions permitting the Holders of a majority in principal
amount of the Securities of each series at the time Outstanding, on behalf of
the Holders of all Securities of such series, to waive certain past defaults
under the Indenture and their consequences.  Any such consent or waiver by the
Holder of this Note shall be conclusive and binding upon such Holder and upon
all future Holders of this Note and of any Note issued upon the registration of
transfer hereof or in exchange herefor or in lieu hereof, whether or not
notation of such consent or waiver is made upon this Note.

     No reference herein to the Indenture and no provision of this Note or of 
the Indenture shall alter or impair the obligation of the Company which is
absolute and unconditional to pay the principal of and interest on this Note at
the times, place and rate, and in the coin or currency herein and in the
Indenture prescribed.

     As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this Note is registerable in the Security Register, upon
surrender of this Note for registration of transfer at the office or agency of
the Company in any place where the principal of and interest on this Note are
payable, duly endorsed by, or accompanied by a written instrument of transfer
in form satisfactory to the Company and the Security Registrar duly executed
by, the Holder hereof or his attorney duly authorized in writing, and thereupon
one or more new Notes of authorized denominations and for the same aggregate
principal amount will be issued to the designated transferee or transferees.

     The Notes are issuable only in registered form without coupons in
denominations of $1,000 and any amount in excess thereof which is an integral
multiple of $1,000.  As provided in the Indenture and subject to certain
limitations therein set forth, the Notes are exchangeable for a like aggregate
principal amount of Notes of a different authorized denomination, as requested
by the Holder surrendering the same.

     No service charge shall be made for any such registration of transfer or
exchange, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

     Prior to due presentment of this Note for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Note is registered as the owner hereof for all
purposes, whether or not this Note be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.
<PAGE>   14
                                                                            -14-


     This Note shall be construed in accordance with and governed by the laws of
the State of New York.
<PAGE>   15
                                                                            -15-

                         -----------------------------
                                 ABBREVIATIONS

  The following abbreviations, when used in the inscription on the face of this
instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

            TEN COM -- as tenants in common

            TEN ENT -- as tenants by the entireties

            JT ENT  -- as joint tenants and not as tenants in common

            UNIF GIFT MIN ACT..........Custodian...............
                               (Cust)               (Minor)

                             under Uniform Gift to Minors Act

                             ..................................
                                            (State)

  Additional abbreviations may be used though not in the above list.


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

  FOR VALUE RECEIVED the undersigned hereby sells, assigns and transfers unto
PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE

- -------------------------------------------------------------------------------
(Name and address of assignee, including zip code, must be printed or
typewritten)

- -------------------------------------------------------------------------------
the within Note, and all rights thereunder, hereby irrevocably constituting and
appointing

- -------------------------------------------------------------------------------
to transfer said Note on the books of the within Company, with full power of
substitution in the premises.

Dated:
      ------------------------------         ----------------------------------
                                             
                                             ----------------------------------

  NOTICE: The signature to this assignment must correspond with the name as
written upon the face of the within Note in every particular, without
alteration or enlargement or any change whatever and must be guaranteed by an
eligible guarantor institution (banks, stockbrokers, savings and loan
associations and credit unions with membership in an approved signature
guarantee medallion program), pursuant to SEC Rule 17Ad-15.
<PAGE>   16
                                                                            -16-

                           OPTION TO ELECT REPAYMENT

  The undersigned hereby irrevocably request(s) and instruct(s) the Company to
repay the within Note (or portion thereof specified below) pursuant to its
terms at a price equal to the principal amount thereof, together with interest
to the repayment date, to the undersigned, at

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

- -------------------------------------------------------------------------------
(Please print or typewrite name and address of the undersigned)

  For this Note to be repaid the Paying Agent must receive at [                ]
New York, New York [      ] or at such other place or places of which the
Company shall from time to time notify the Holder of the within Note, not more
than 45, nor less than 30, days prior to an Optional Repayment Date, if any,
shown on the face of the within Note, either (i) this Note with this "Option to
Elect Repayment" form duly completed, or (ii) a telegram, telex, facsimile
transmission or letter from a member of a national securities exchange or the
National Association of Securities Dealers, Inc. or a commercial bank or trust
company in the United States of America setting forth the name of the holder of
the Note, the principal amount of the Note, the principal amount of the Note to
be repaid, the certificate number or a description of the tenor and terms of
the Note, a statement that the option to elect repayment is being exercised
thereby and a guarantee that the Note to be repaid with the form entitled
"Option to Elect Repayment" on the Note duly completed will be received by the
Paying Agent not later than five Business Days after the date of such telegram,
telex, facsimile transmission or letter and such Note and form duly completed
are received by the Paying Agent by such fifth Business Day.

  If less than the entire principal amount of the within Note is to be repaid,
specify the portion thereof (which shall be increments of $1,000) which the
Holder elects to have repaid:  $_____________ and specify the denomination or
denominations (which shall be $1,000 or an integral multiple of $1,000 in
excess thereof) of the Notes to be issued to the Holder for the portion of the
within Note not being repaid (in the absence of any such specification, one
such Note will be issued for the portion not being repaid): $__________________.

Dated:
      ------------------------------         ----------------------------------

                                             Note:  The signature on this 
                                             Option to Elect Repayment must
                                             correspond with the name as
                                             written upon the face of this Note
                                             in every particular without
                                             alteration or enlargement.




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