AMOCO CORP
424B2, 1995-09-07
PETROLEUM REFINING
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<PAGE>
INFORMATION  CONTAINED IN THIS PROSPECTUS SUPPLEMENT IS SUBJECT TO COMPLETION OR
AMENDMENT.  THIS   PROSPECTUS  SUPPLEMENT   AND  THE   ACCOMPANYING   PROSPECTUS
SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR
SHALL  THERE BE ANY SALE OF THESE SECURITITES  IN ANY STATE IN WHICH SUCH OFFER,
SOLICITATION OR SALE WOULD  BE UNLAWFUL PRIOR  TO REGISTRATION OR  QUALIFICATION
UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
                 SUBJECT TO COMPLETION DATED SEPTEMBER 1, 1995

Prospectus Supplement (To Prospectus Dated August 29, 1995)

AMOCO ARGENTINA OIL COMPANY
ARGENTINE BRANCH

U.S.$100,000,000
  % GUARANTEED NEGOTIABLE OBLIGATIONS DUE 2005
UNCONDITIONALLY AND IRREVOCABLY GUARANTEED BY
AMOCO CORPORATION AND AMOCO COMPANY

Amoco  Argentina  Oil  Company,  a  Delaware  corporation,  acting  through  its
Argentine  Branch  (the  "Company"),  is  offering  U.S.$100,000,000   aggregate
principal  amount  of      % Guaranteed  Negotiable  Obligations  Due  2005 (the
"Securities Due  2005").  The Securities  Due  2005  will be  issued  under  the
Company's U.S.$200,000,000 Medium-Term Note Program.

Interest on the Securities Due 2005 will be payable semi-annually on March   and
September   , commencing March   , 1996.

The  Securities Due 2005  will be represented  by one or  more global registered
certificates (the "Global Securities"), registered in  the name of a nominee  of
The  Depository  Trust Company,  as Depositary.  Ownership  of interests  in the
Global Securities will be  shown on, and the  transfer thereof will be  effected
only  through,  records maintained  by the  Depositary or  its nominee  for such
Global Securities  and  on  the  records of  participants.  Except  for  certain
Argentine persons and entities which are, in effect, required to hold Securities
Due  2005 in  definitive form and  as otherwise described  under "Description of
Securities Due  2005 --  Global Securities"  in this  Prospectus Supplement  and
"Description  of Securities -- Global Registered Securities" in the accompanying
Prospectus, owners of beneficial interests in the Global Securities will not  be
entitled  to receive  Securities Due  2005 in  definitive form  and will  not be
considered the holders thereof.

The due and  punctual payment of  principal and interest  on the Securities  Due
2005  will  be unconditionally  guaranteed (the  "related Guarantees")  by Amoco
Corporation, an Indiana  corporation ("Amoco"),  and Amoco  Company, a  Delaware
corporation ("Amoco Company" and, together with Amoco, the "Guarantors").

The Securities Due 2005 will not be redeemable prior to maturity, except for tax
reasons  as set forth  under "Description of  Securities Due 2005  -- Payment of
Additional Amounts; Redemption  for Tax Reasons"  in this Prospectus  Supplement
and   "Description  of  Securities  --  Redemption   for  Tax  Reasons"  in  the
accompanying Prospectus.
          -----------------------------------------------------------

THESE SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES  AND
EXCHANGE  COMMISSION OR ANY  STATE SECURITIES COMMISSION  NOR HAS THE SECURITIES
AND EXCHANGE  COMMISSION OR  ANY  STATE SECURITIES  COMMISSION PASSED  UPON  THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS SUPPLEMENT OR THE PROSPECTUS TO WHICH IT
RELATES. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
          -----------------------------------------------------------

<TABLE>
<CAPTION>
                                  PRICE TO                UNDERWRITING            PROCEEDS TO
                                  PUBLIC(1)               DISCOUNT(2)             THE COMPANY(1)(3)
<S>                               <C>                     <C>                     <C>
Per Security Due 2005...........  %                       %                       %
Total...........................  U.S.$   ,000,000        U.S.$                   U.S.$   ,000,000
<FN>
(1)  Plus accrued interest, if any, from September   , 1995.
(2)  The  Company  and the  Guarantors have,  jointly  and severally,  agreed to
     indemnify  the   Underwriters   against  certain   liabilities,   including
     liabilities  under  the  U.S.  Securities  Act  of  1933,  as  amended. See
     "Underwriting".
(3)  Before deducting expenses payable by the Company estimated at U.S.$623,000.
</TABLE>

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

The Securities Due 2005 are offered by the Underwriters, subject to prior  sale,
when,  as and  if issued by  the Company  and accepted by  the Underwriters, and
subject to  certain other  conditions.  The Underwriters  reserve the  right  to
withdraw,  cancel or modify such offer and to reject orders in whole or in part.
It is expected  that the delivery  of the Securities  Due 2005 will  be made  in
book-entry  form through  the facilities of  The Depository Trust  Company on or
about September   , 1995.

CHEMICAL SECURITIES INC.

                           CITICORP SECURITIES, INC.

                                                            MORGAN STANLEY & CO.
                                                                INCORPORATED
The date of this Prospectus Supplement is September   , 1995.
<PAGE>
    IN  CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE SECURITIES  DUE
2005  AT LEVELS ABOVE  THOSE WHICH MIGHT  OTHERWISE PREVAIL IN  THE OPEN MARKET.
SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
                            ------------------------

                                USE OF PROCEEDS

    The net proceeds from the  sale of the Securities Due  2005 will be used  by
the  Company,  in  compliance  with  Article  36  of  the  Argentine  Negotiable
Obligations Law, to repay certain outstanding indebtedness of the Company.  Such
indebtedness  currently  bears interest  at an  annual rate  of 8.645%  and will
mature on December 31, 1998.

                       DESCRIPTION OF SECURITIES DUE 2005

    The following description of the particular terms of the Securities Due 2005
offered hereby  (referred to  in the  accompanying Prospectus  as  "Securities")
supplements,  and to the extent inconsistent therewith replaces, the description
of the  general  terms  and  provisions  of the  Securities  set  forth  in  the
Prospectus,  to which reference  is hereby made.  The following description does
not purport to be complete and is  subject, and is qualified in its entirety  by
reference,  to the detailed  provisions of the Securities  Due 2005, the related
Guarantees and the Indenture referred to below.

    Capitalized terms which are not defined in this Prospectus Supplement  shall
have  the meanings specified in the  accompanying Prospectus, unless the context
otherwise requires.

GENERAL

    The Securities Due 2005  will be issued under  the Indenture, which is  more
fully described in the accompanying Prospectus.

    The  Securities  Due  2005  will be  limited  to  U.S.$100,000,000 aggregate
principal amount and will mature on September   , 2005.

    The Securities Due 2005 will be issued only in denominations of U.S.$100,000
and integral multiplies of U.S.$1,000 in excess thereof.

    The Securities Due 2005 will  bear interest at the  rate per annum shown  on
the cover of this Prospectus Supplement from September   , 1995 or from the most
recent  Interest Payment Date to  which interest has been  paid or provided for,
payable semi-annually on March   and September   of each year, commencing  March
  ,  1996, to the persons  in whose names Securities  Due 2005 are registered at
the close of business on the March   or  September   , as the case may be,  next
preceding such Interest Payment Date.

    The Securities Due 2005 will not be redeemable prior to maturity, except for
tax  reasons as set  forth under "Payment of  Additional Amounts; Redemption for
Tax Reasons" below and "Description of Securities -- Redemption for Tax Reasons"
in the accompanying Prospectus.

    The corporate trust department of each of The Chase Manhattan Bank (National
Association) and The Chase Manhattan  Bank, N.A. (Buenos Aires) will  constitute
the places at which payments will be made in respect of the Securities Due 2005,
where the Securities Due 2005 may be surrendered for registration of transfer or
for  exchange  and where  notices and  demands to  or upon  the Company  and the
Guarantors in respect  of the Securities  Due 2005 may  be served. See  "Certain
Covenants of the Company -- Maintenance of Office or Agency" in the accompanying
Prospectus.

GLOBAL SECURITIES

    The  Securities  Due  2005  will  be  represented  by  one  or  more  Global
Securities, registered in the name of a nominee of The Depository Trust Company,
as Depositary.  The provisions  set forth  under "Description  of Securities  --
Global  Registered Securities" in the accompanying Prospectus will be applicable
to the Securities Due 2005. Accordingly,  ownership of interests in such  Global
Securities  will be  shown on,  and the transfer  thereof will  be effected only
through, records maintained  by the Depositary  or its nominee  for such  Global
Securities  Due  2005 and  on the  records of  participants. Except  for certain
Argentine persons and entities which are, in effect, required to hold Securities
Due 2005 in definitive form and as otherwise

                                      S-2
<PAGE>
described under "Description of Securities  -- Global Registered Securities"  in
the  accompanying  Prospectus,  owners  of beneficial  interests  in  the Global
Securities will not  be entitled to  receive Securities Due  2005 in  definitive
form  and  will  not be  considered  the  holders of  Securities  Due  2005. See
"Taxation -- Argentine Taxation" in the accompanying Prospectus for  information
concerning  the  form  in  which  Argentine persons  and  entities  are  to hold
Securities Due 2005.

    The Depositary has advised the Company, the Guarantors and the  Underwriters
as  follows: The Depositary  is a limited-purpose  trust company organized under
New York Banking Law, a "banking corporation" within the meaning of the New York
Banking Law, a member  of the Federal Reserve  System, a "clearing  corporation"
within  the meaning  of the  New York Uniform  Commercial Code,  and a "clearing
agency" registered  under the  1934  Act. The  Depositary  was created  to  hold
securities of its participants and to facilitate the clearance and settlement of
securities  transactions  among  its  participants  in  such  securities through
electronic  book-entry  changes  in   accounts  of  the  participants,   thereby
eliminating  the  need for  physical  movement of  securities  certificates. The
Depositary's participants include securities brokers and dealers (including  the
Underwriters),  banks, trust companies, clearing  corporations and certain other
organizations, some of whom (and/or  their representatives) own the  Depositary.
Access to the Depositary's book-entry system is also available to others such as
securities  brokers and dealers, banks and trust companies that clear through or
maintain a  custodial  relationship  with  a  participant,  either  directly  or
indirectly.

    Under  the  terms of  the  Indenture, the  Company,  the Guarantors  and the
Trustee will  treat the  persons in  whose  names the  Securities Due  2005  are
registered  as  the  owners of  such  Securities  Due 2005  for  the  purpose of
receiving payment of principal of and  interest on such Securities Due 2005  and
for   all  other  purposes  whatsoever.  Therefore,  neither  the  Company,  the
Guarantors, the Trustee nor  any paying agent has  any direct responsibility  or
liability for the payment of principal of or interest on the Securities Due 2005
to  owners of beneficial interests in  the Global Securities. The Depositary has
advised the Company, the  Guarantors and the Trustee  that its current  practice
is,  upon  receipt of  any  payment of  principal,  or interest,  to  credit the
accounts of the participants with such payment in amounts proportionate to their
respective holdings in principal  amount of beneficial  interests in the  Global
Securities  as shown in the records  of the Depositary. Payments by participants
and indirect  participants  to owners  of  beneficial interests  in  the  Global
Securities will be governed by standing instructions and customary practices, as
is  now the case  with securities held  for the accounts  of customers in bearer
form or  registered in  "street name",  and will  be the  responsibility of  the
participants or indirect participants.

SETTLEMENT AND PAYMENT

    Settlement  for the Securities Due 2005 will  be made by the Underwriters in
same-day funds. All payments of principal and interest will be made in  same-day
funds.  Secondary market trading  activity in the Securities  Due 2005 will also
settle in same-day funds.

PAYMENT OF ADDITIONAL AMOUNTS; REDEMPTION FOR TAX REASONS

    The Company will,  subject to  certain exceptions and  limitations, pay  any
Additional  Amounts in respect of any withholding  or deduction for Taxes now or
hereafter imposed or established by or  on behalf of Argentina or any  political
subdivision thereof or taxing authority therein so that each Holder and owner of
beneficial  interests in  Securities Due 2005  receives the  payment which would
have been receivable in the absence of such withholding or deduction, as, and to
the extent, set forth under "Description  of Securities -- Certain Covenants  of
the Company -- Payment of Additional Amounts" in the accompanying Prospectus. In
addition,  and notwithstanding any  statement in the  accompanying Prospectus to
the contrary,  the Company  will (i)  pay  to or  on behalf  of each  Holder  of
Securities  Due  2005  any  Additional  Amounts  in  respect  of  any  Argentine
individual asset tax and  (ii) pay and indemnify  each Holder of Securities  Due
2005  from and against any Argentine individual  asset tax imposed on or paid by
such Holder or owner  of beneficial interests therein,  except that the  Company
will  not pay any Additional  Amounts in respect of,  or indemnify any Holder of
Securities Due  2005  or owner  of  any  beneficial interest  therein  from  and
against,  any Argentine  individual asset  tax if  such Holder  or owner  of any
beneficial interest  is (a)  a citizen  of,  or resident  in, Argentina,  (b)  a
corporation  or  other  entity organized  or  incorporated in  Argentina,  (c) a
corporation or other entity which is not organized or incorporated in Argentina,
but which has a permanent establishment

                                      S-3
<PAGE>
in Argentina or (d) a corporation or other entity which is exempt from any  such
Argentine  individual  asset  tax. The  Company  will make  indemnity  and other
payments in  respect  of any  such  Argentine  individual asset  tax  only  upon
production of (i) official tax receipts or other evidence of payment of any such
tax  by  or on  behalf of  a Holder  or  the owners  of beneficial  interests in
Securities Due 2005 and (ii) a statement by such Holder or owners of  beneficial
interests  as to the aggregate principal amount  of Securities Due 2005 to which
such payment of  any such tax  relates and the  value of such  Securities as  of
December  31  of  the relevant  calendar  year.  The Company  will  not  pay any
additional amounts  in  respect  of  Taxes  imposed  by  any  other  country  or
jurisdiction.

    The  Securities Due 2005 will be redeemable as a whole (but not in part), at
the option of the Company, at  any time upon not less  than 30 nor more than  60
days'  notice  given  to the  Holders  as  provided in  the  Indenture  at their
principal amount together with accrued  interest thereon to the Redemption  Date
in the event that the Company becomes obligated to pay any Additional Amounts in
accordance  with  the  first sentence  of  the  preceding paragraph  and  in the
circumstances set forth under "Description  of Securities -- Redemption for  Tax
Reasons"  in the accompanying  Prospectus. In addition,  the Securities Due 2005
will be redeemable in whole (but not in part), at the option of the Company,  at
their  principal amount together with accrued interest thereon to the Redemption
Date in  the event  that the  Company becomes  obligated to  pay any  Additional
Amounts  or make  any indemnity  or other payments  in respect  of any Argentine
individual asset tax  in accordance with  the second sentence  of the  preceding
paragraph,  but  only in  the event  that the  payments in  respect of  any such
Argentine individual asset tax exceed U.S.$250,000 in the aggregate with respect
to any calendar year and such payments  cannot be avoided by the Company  taking
reasonable  measures available  to it.  In order to  effect a  redemption of the
Securities under the preceding sentence, the  Company is required to deliver  to
the  Trustee at  least 45 days  prior to  the Redemption Date  (i) a certificate
signed by  two Directors  of the  Company  stating that  the obligation  to  pay
Additional Amounts and to make any indemnity or other payments in respect of any
Argentine  individual  asset  tax exceeds  or  will exceed  U.S.$250,000  in the
aggregate with respect to a specified calendar year and cannot be avoided by the
Company taking  reasonable measures  available  to it  and  (ii) an  opinion  of
independent counsel of recognized standing to the effect that the Company has or
will  become obligated to pay such Additional  Amounts or make such indemnity or
other payments in respect  of such Argentine individual  asset tax in excess  of
U.S.$250,000  in the  aggregate in  the case  of a  specified calendar  year. No
notice of redemption may  be given earlier  than 60 days  prior to the  earliest
date  on which the Company would be  obligated to pay such Additional Amounts or
to make such indemnity  or other payments with  such Argentine individual  asset
tax  in  excess of  U.S.$250,000 in  the aggregate  in the  case of  a specified
calendar year were a payment in respect of the Securities then due.

    The Argentine individual  asset tax  currently is  assessable at  a rate  of
one-half  of  one percent  (0.5%)  of the  value  of holdings  of  Securities of
individuals (I.E., natural persons) and, in certain circumstances,  corporations
and  other entities, as set forth under  "Taxation -- Argentine Taxation" in the
accompanying Prospectus.  As stated  above,  the Securities  Due 2005  will  not
become redeemable for tax reasons relating to the Argentine individual asset tax
unless  the  Company becomes  obligated to  pay  Additional Amounts  and/or make
indemnity or other payments in respect of such tax in excess of U.S.$250,000  in
the aggregate in the case of any calendar year. Accordingly, in the light of the
current  tax  rate, and  assuming  that the  Securities  Due 2005  have  a value
comparable  to  their  aggregate  principal  amount,  the  Securities  Due  2005
currently  would not become redeemable  unless Holders of approximately one-half
of the aggregate principal amount of  the Securities Due 2005 become subject  to
the  Argentine individual  asset tax.  Prospective purchasers  of Securities Due
2005 should  understand, however,  that (i)  changes from  time to  time in  the
identities  of Holders or owners of beneficial interests therein could result in
a greater or  lesser number of  such persons becoming  subject to the  Argentine
individual  asset  tax, (ii)  changes from  time to  time in  the values  of the
Securities Due 2005 could result in aggregate payments by the Company in  excess
of  U.S.$250,000 in a  calendar year and  (iii) as set  forth under "Taxation --
Argentine Taxation" in the accompanying  Prospectus, certain aspects of the  law
implementing  such tax are unclear. Moreover, there can be no assurance that the
one-half of one percent (0.5%) tax rate will not increase or that the Securities
Due 2005 will not become redeemable for such tax reasons.

                                      S-4
<PAGE>
    Interest and other payments in respect of the Securities Due 2005  currently
are  exempt from Argentine  income and other  taxes, as, and  to the extent, set
forth under "Taxation -- Argentine Taxation" in the accompanying Prospectus.

                                  UNDERWRITING

    Subject to the terms and conditions set forth in the Underwriting  Agreement
Standard  Provisions dated September    ,  1995 and in  the related Underwriting
Agreement dated September   , 1995 (together, the "Underwriting Agreement"), the
Company has agreed to sell to each of the Underwriters named below, and each  of
the  Underwriters has severally agreed to  purchase, the principal amount of the
Securities Due 2005 set forth opposite its name below.

<TABLE>
<CAPTION>
                                                                            PRINCIPAL AMOUNT
                                                                           OF SECURITIES DUE
UNDERWRITERS                                                                      2005
- -------------------------------------------------------------------------  ------------------
<S>                                                                        <C>
Chemical Securities Inc..................................................   U.S.$ 33,400,000
Citicorp Securities, Inc.................................................         33,300,000
Morgan Stanley & Co. Incorporated........................................         33,300,000
                                                                           ------------------
    Total................................................................   U.S.$100,000,000
                                                                           ------------------
                                                                           ------------------
</TABLE>

    Under  the  terms  and  conditions   of  the  Underwriting  Agreement,   the
Underwriters  are committed to take and pay  for all of the Securities Due 2005,
if any are taken.

    The Underwriters propose to offer the  Securities Due 2005 in part  directly
to  purchasers at the initial public offering  price set forth on the cover page
of this Prospectus Supplement, and in part to certain securities dealers at such
price less a concession of 0.  %  of the principal amount of the Securities  Due
2005. The Underwriters may allow, and such dealers may reallow, a concession not
in excess of 0.  % of the principal amount of the Securities Due 2005 to certain
brokers  and dealers. After the Securities Due 2005 are released for sale to the
public, the offering  price and other  selling terms  may from time  to time  be
varied by the Underwriters.

    The  Company does not intend to apply for listing of the Securities Due 2005
on any  United States,  Argentine  or other  securities exchange.  However,  the
Company  has been advised by the Underwriters  that they intend to make a market
in the Securities  Due 2005, as  permitted by applicable  laws and  regulations.
There  can be no assurance, however, that the Underwriters will make a market in
the Securities Due 2005 or  as to the liquidity of,  or the trading market  for,
the Securities Due 2005.

    The  Company  and  the Guarantors,  jointly  and severally,  have  agreed to
indemnify the Underwriters  against certain  liabilities, including  liabilities
under  the Securities Act,  or to contribute to  payments which the Underwriters
may be required to make in respect thereof.

    Each of the  Underwriters and  its respective  affiliates have  in the  past
engaged  and continue to engage in  transactions with, and perform services for,
Amoco and its  subsidiaries in  the ordinary  course of  business. In  addition,
Chemical  Securities  Inc.  and  Citicorp  Securities,  Inc.  are  affiliates of
Chemical Bank and Citibank, N.A., respectively,  which are lenders to Amoco  and
certain of its affiliates.
                            ------------------------

    The  Argentine COMISION NACIONAL DE VALORES (National Securities Commission,
or "CNV") has  authorized, by  Resolution No. 10,982  dated July  13, 1995,  the
establishment  of the Medium-Term Note Program  pursuant to which the Securities
Due 2005 will be issued, offered and sold. The public offering of the Securities
Due 2005 in Argentina has been authorized on August 31, 1995 by the CNV. The CNV
has not passed upon  the accuracy or adequacy  of this Prospectus Supplement  or
the accompanying Prospectus.

    The  Securities Due 2005 will be  offered in Argentina through substantially
similar  Spanish  language  versions  of  this  Prospectus  Supplement  and  the
accompanying  Prospectus,  except  that  the  Spanish  language  version  of the
Prospectus contains  certain  additional information  concerning  the  Company's
Argentine Branch in compliance with CNV requirements.

                                      S-5
<PAGE>
PROSPECTUS

                            MEDIUM-TERM NOTE PROGRAM
                             NEGOTIABLE OBLIGATIONS

                                       OF

                          AMOCO ARGENTINA OIL COMPANY
                                ARGENTINE BRANCH

                 UNCONDITIONALLY AND IRREVOCABLY GUARANTEED BY

                      AMOCO CORPORATION AND AMOCO COMPANY

    Amoco  Argentina  Oil Company,  a Delaware  corporation, acting  through its
Argentine Branch (the  "Company"), may from  time to time  offer its  Negotiable
Obligations  (the "Securities") in one or more series for issuance and sale from
which the  Company  will  receive  proceeds  of  up  to  an  aggregate  of  U.S.
$200,000,000 or the equivalent in foreign denominated currency or units based on
or  relating to currencies, including  European Currency Units ("ECUs"),on terms
determined by  market conditions  at the  time of  sale. The  Securities of  any
series  will have maturities of not less than 90 days and not more than 30 years
from the date  of issue of  such Securities,  and the original  issuance of  any
Securities  of a series shall occur prior to July 13, 2000. The due and punctual
payment of principal  and premium  and interest, if  any, on  the Securities  is
unconditionally  guaranteed (the "Guarantees") by  Amoco Corporation, an Indiana
corporation  ("Amoco"),  and  Amoco  Company,  a  Delaware  corporation  ("Amoco
Company" and, together with Amoco, the "Guarantors"). The Company is an indirect
wholly-owned  subsidiary of Amoco  Company, and Amoco  Company is a wholly-owned
subsidiary of Amoco. With respect to the Securities as to which this  Prospectus
is  being  delivered,  the  specific  designation,  aggregate  principal amount,
maturity, rate (or  manner of calculation  thereof) and time  of payment of  any
interest,  the  purchase price,  the currency  or currency  units for  which the
Securities may be purchased, the currency or currency units in which payments in
respect of  Securities may  be made,  and any  terms for  mandatory or  optional
redemption  (including any  sinking fund) and  any other specific  terms are set
forth in the accompanying Prospectus Supplement ("Prospectus Supplement").

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

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES  AND
   EXCHANGE  COMMISSION  OR ANY  STATE SECURITIES  COMMISSION NOR  HAS THE
      SECURITIES  AND  EXCHANGE  COMMISSION  OR  ANY  STATE   SECURITIES
        COMMISSION  PASSED UPON  THE ACCURACY  OR ADEQUACY  OF THIS
             PROSPECTUS.  ANY   REPRESENTATION  TO   THE   CONTRARY
                                    IS A CRIMINAL OFFENSE.

    The  Securities may be offered directly, through agents designated from time
to  time,  through  dealers  or  through  Chemical  Securities  Inc.,   Citicorp
Securities,  Inc., Morgan  Stanley & Co.  Incorporated and/or one  or more other
managing underwriters to be named in the Prospectus Supplement, acting alone  or
with other underwriters. See "Plan of Distribution". Any such agents, dealers or
underwriters  are set  forth in  the Prospectus Supplement.  If an  agent of the
Company or a dealer or underwriter is involved in the offering of the Securities
in connection  with  which  this  Prospectus is  being  delivered,  the  agent's
commission,  dealer's purchase price or underwriter's discount will be set forth
in, or may be calculated from,  the Prospectus Supplement, and the net  proceeds
to the Company from such sale will be the purchase price of such Securities less
such  commission in the case of an  agent, the purchase price of such Securities
in the case of a dealer, and the public offering price less such discount in the
case of  an underwriter,  and less,  in each  case, the  other expenses  of  the
Company associated with such issuance and distribution.

    The  aggregate proceeds to the Company from  all the Securities sold will be
the purchase  price  of  such  Securities less  the  aggregate  of  any  agents'
commissions,  any underwriters' discounts and the other expenses of issuance and
distribution.  See   "Plan  of   Distribution"  for   possible   indemnification
arrangements for agents, dealers or underwriters.

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

                THE DATE OF THIS PROSPECTUS IS AUGUST 29, 1995.
<PAGE>
    NO  PERSON IS AUTHORIZED IN CONNECTION WITH ANY OFFERING MADE HEREBY TO GIVE
ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED OR INCORPORATED  BY
REFERENCE  IN THIS PROSPECTUS OR ANY  PROSPECTUS SUPPLEMENT, AND ANY INFORMATION
OR REPRESENTATION NOT CONTAINED OR  INCORPORATED BY REFERENCE HEREIN OR  THEREIN
MUST  NOT BE RELIED UPON AS HAVING  BEEN AUTHORIZED BY THE COMPANY, AMOCO, AMOCO
COMPANY OR ANY  OTHER PERSON.  THIS PROSPECTUS  IS NOT AN  OFFER TO  SELL, OR  A
SOLICITATION  OF ANY OFFER TO BUY, BY ANY PERSON IN ANY JURISDICTION IN WHICH IT
IS UNLAWFUL FOR SUCH PERSON TO MAKE  SUCH AN OFFER OR SOLICITATION. NEITHER  THE
DELIVERY  OF  THIS  PROSPECTUS NOR  ANY  SALE  MADE HEREUNDER  SHALL,  UNDER ANY
CIRCUMSTANCES, CREATE ANY IMPLICATION THAT  THE INFORMATION CONTAINED HEREIN  IS
CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE OF SUCH INFORMATION.

                             AVAILABLE INFORMATION

    Amoco and Amoco Company are subject to the informational requirements of the
Securities  Exchange Act of 1934, as amended (the "1934 Act"), and in accordance
therewith file  reports  and other  information  with the  U.S.  Securities  and
Exchange  Commission (the "Commission").  Certain current information concerning
such corporations'  directors and  officers and  (in the  case of  Amoco)  their
remuneration,  options granted to them, the principal holders of securities, and
any material  interest of  such  persons in  transactions  with Amoco  or  Amoco
Company,  respectively,  is  disclosed  in  a  proxy  statement  distributed  to
shareholders of Amoco  and in  certain of  Amoco's and  Amoco Company's  reports
filed  with the Commission.  The Registration Statement  and such reports, proxy
statements, and other information can be  inspected and copied at the  following
regional  offices  of  the  Commission: 500  West  Madison  Street,  Suite 1400,
Chicago, Illinois 60661-2511, and  7 World Trade Center,  13th Floor, New  York,
New  York  10048.  Copies can  also  be  obtained from  the  Commission's Public
Reference Section, 450 Fifth Street, N.W., Washington, D.C. 20549 at  prescribed
rates.  Amoco's  common  stock is  listed  on  the New  York,  Chicago, Pacific,
Toronto, and four Swiss  stock exchanges. Reports,  proxy statements, and  other
information  concerning Amoco can be inspected at the New York, Chicago, Pacific
and Toronto stock exchanges.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

    There are hereby incorporated by reference in this Prospectus the  following
statements:

        (a)  Amoco's Annual Report on Form 10-K  for the year ended December 31,
    1994 (the "Amoco 1994 Form 10-K");

        (b) Amoco  Company's Annual  Report  on Form  10-K  for the  year  ended
    December 31, 1994;

        (c)  Amoco's  definitive  Proxy  Statement  dated  March  13,  1995,  in
    connection with its Annual  Meeting of Shareholders held  on April 25,  1995
    (other  than  the Board  Compensation and  Organization Committee  Report on
    Executive Compensation and  the Cumulative Total  Shareholder Return  Graph,
    which are not incorporated by reference herein);

        (d)  Amoco's Current Reports on Form 8-K dated April 5, 1995 (the "Amoco
    April 5, 1995 Form 8-K") and dated April 13, 1995; and

        (e) Amoco Company's Current Report on Form 8-K dated April 5, 1995;

        (f) Amoco's Quarterly Reports on Form  10-Q for the periods ended  March
    31, 1995 and June 30, 1995 (the "Amoco June 30, 1995 Form 10-Q"); and

        (g) Amoco Company's Quarterly Reports on Form 10-Q for the periods ended
    March 31, 1995 and June 30, 1995;

in each case as filed with the Commission pursuant to the 1934 Act.

    All  reports pursuant to Sections 13(a), 13(c),  14 or 15(d) of the 1934 Act
and all  definitive proxy  statements (other  than the  portions of  such  proxy
statements  consisting of (i)  the report of  any committee of  Amoco's Board of
Directors on executive compensation and  (ii) the shareholder return  comparison
graph)  pursuant to Section 14 of the 1934  Act filed by Amoco and Amoco Company
after the date of this Prospectus and  prior to the termination of the  offering
of   the  Securities   shall  be   deemed  to   be  incorporated   by  reference

                                       2
<PAGE>
in this Prospectus  and to  be a part  hereof from  the date of  filing of  such
documents.  Amoco's Annual  Reports on Form  10-K (subsequent to  the Amoco 1994
Form 10-K) will include summary financial information concerning the Company and
Amoco Company, and  Amoco's Quarterly  Reports on  Form 10-Q  will also  include
Company and Amoco Company summary financial information. Any statement contained
herein  or in a document incorporated or  deemed to be incorporated by reference
herein shall  be  deemed to  be  modified or  superseded  for purposes  of  this
Prospectus   to  the  extent  that  a  statement  contained  herein  or  in  any
subsequently filed document  which also is  or is deemed  to be incorporated  by
reference  herein  or  in  the accompanying  Prospectus  Supplement  modifies or
supersedes such statement. Any  such statement so  modified or superseded  shall
not be deemed, except as so modified or superseded, to constitute a part of this
Prospectus.

    The  Company, Amoco  and Amoco Company  will provide without  charge to each
person, including any beneficial  owner, to whom a  copy of this Prospectus  has
been  delivered, on the written or telephone  request of any such person, a copy
of any or all  of the information referred  to herein which has  been or may  be
incorporated  in  this  Prospectus by  reference,  other than  exhibits  to such
documents unless such exhibits are  specifically incorporated by reference  into
such  documents. Written  requests for such  copies should be  directed to Amoco
Corporation,  P.O.   Box  87703,   Chicago,  Illinois   60680-0703,   Attention:
Shareholder Services-0402. Telephone requests may be directed to 312-856-7981.

    The  Company, Amoco and Amoco Company will provide copies of this Prospectus
without charge upon  written or  telephone request. Written  requests should  be
directed to Amoco Argentina Oil Company, Maipu 942 - Piso 19, 1340 Buenos Aires,
Argentina. Telephone requests may be directed to 54-1-315-4011.

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

    The Securities are "obligaciones negociables" (negotiable obligations) under
the Argentine Negotiable Obligations Law No. 23,576, as amended (the "Negotiable
Obligations Law").

    The  Argentine COMISION NACIONAL DE VALORES (National Securities Commission,
or "CNV") has  authorized, by  Resolution No. 10,982  dated July  13, 1995,  the
establishment  of the Medium-Term Note Program (the "Program") pursuant to which
the  Securities  will  be  issued,  offered  and  sold.  The  CNV  granted  such
authorization after reviewing certain financial and other information concerning
the  Company's Argentine Branch, but not the financial statements of the Company
and the Guarantors. The CNV has not passed upon the accuracy or adequacy of this
Prospectus. The public offering  in Argentina of the  Securities of each  series
will  be deemed  to be  included in  the above-referenced  authorization for the
Program provided that certain documentation  filing and related requirements  of
the CNV are satisfied.

    The  Securities will be  offered in Argentina  through substantially similar
Spanish language  versions  of this  Prospectus  and any  applicable  Prospectus
Supplement, except that the Spanish language version of this Prospectus contains
certain  additional  information concerning  the  Company's Argentine  Branch in
compliance with CNV requirements.

                                       3
<PAGE>
                                  THE COMPANY

    The  Company  was incorporated  in Delaware  in 1958  and has  its principal
executive  offices  at  200  East   Randolph  Drive,  Chicago,  Illinois   60601
(telephone:  312-856-6111) and its principal offices in Argentina at Maipu 942 -
Piso 19, 1340 Buenos Aires,  Argentina (telephone: 54-1-315-4011). The  Company,
which  is  an indirect,  wholly-owned  subsidiary of  Amoco,  is engaged  in the
exploration, development  and  production  of  oil  in  Argentina.  The  Company
conducts  all of its  operations in Argentina through  its Argentine branch (the
"Argentine Branch").  The  Argentine  Branch was  originally  registered  as  an
Argentine  branch with the Public Registry  of Commerce in Argentina on November
25, 1958, under number 60, page (folio) 60, book 50, volume B of foreign by-laws
and registered its  present name  on November 24,  1969, under  number 62,  page
(folio) 95, book 51, volume B of foreign by-laws.

                               AMOCO CORPORATION

    Amoco  was incorporated in  Indiana in 1889 and  has its principal executive
offices  at  200  East  Randolph  Drive,  Chicago,  Illinois  60601  (telephone:
312-856-6111).  Amoco  is a  parent  corporation concerned  with  overall policy
guidance, financing,  coordination of  operations, staff  services,  performance
evaluation  and  planning  for  its  subsidiaries.  Amoco  and  its consolidated
subsidiaries form a large integrated petroleum and chemical enterprise.

                                 AMOCO COMPANY

    Amoco Company, which was incorporated in Delaware in 1985, has its principal
executive  offices  at  200  East   Randolph  Drive,  Chicago,  Illinois   60601
(telephone: 312-856-6111). Amoco Company, a wholly-owned subsidiary of Amoco, is
the  holding  company for  substantially  all petroleum  and  chemical operating
subsidiaries except Amoco Canada Petroleum  Company Ltd., which is  wholly-owned
by  Amoco.  The principal  wholly-owned subsidiaries  of  Amoco Company  and the
businesses in which they are engaged are summarized below:

<TABLE>
<S>                                        <C>
Amoco Production Company.................  Exploration, development, and  production
                                           of crude oil, natural gas and natural gas
                                           liquids, and marketing of natural gas.

Amoco Oil Company........................  Refining,  marketing and  transporting of
                                           petroleum and related products.

Amoco Chemical Company...................  Manufacture   and   sale   of    chemical
                                           products.
</TABLE>

    In 1994, a major restructuring occurred that effectively eliminated the role
of  the  above  three  principal  subsidiaries  of  Amoco  Company  as operating
entities. The new organization is  structured around 17 business groups  divided
into   three  sectors:  Exploration  and   Production,  Petroleum  Products  and
Chemicals. The  Exploration  and  Production Sector  includes  U.S.  operations,
international  operations, Canada,  natural gas,  worldwide exploration, Eurasia
and  exploration  and  production  technology.  The  Petroleum  Products  Sector
includes  refining, marketing,  supply and logistics  and international business
development.  The  Chemicals  Sector  includes  chemical  feedstocks,   chemical
intermediates,  polymers, fabrics and fibers,  foam products and development and
diversification.

                                       4
<PAGE>
                      RATIOS OF EARNINGS TO FIXED CHARGES

    The Company's ratio of  earnings to fixed charges  for the six months  ended
June  30, 1995 was 15.2 and  for the year ended December  31, 1994 was 18.2. The
Company had no fixed charges for years prior to 1994.

    Amoco's ratio of earnings to fixed charges for the six months ended June 30,
1995 and for each of the five years ended December 31, 1994 was as follows: June
30, 1995--8.0, 1994--8.9, 1993--8.0, 1992--3.5, 1991--5.0 and 1990--6.5.

    Amoco Company's ratio  of earnings  to fixed charges  on outstanding  public
obligations  for the  six months ended  June 30, 1995  and for each  of the five
years ended December 31, 1994 was  as follows: June 30, 1995--13.0,  1994--20.4,
1993--13.2, 1992--8.3, 1991--9.2 and 1990--13.5.

    Ratios of earnings to fixed charges are computed for each of the enterprises
as  a  whole,  including  its  majority  owned  consolidated  and unconsolidated
subsidiaries, and certain 50 percent  or less owned companies. Earnings  consist
of  income before income taxes and expensed fixed charges; fixed charges include
interest on  indebtedness, amortization  of  debt discount  and premium,  and  a
portion   of  rental   expense,  net   of  income   from  subleased  properties,
representative of an interest factor.

                            SELECTED FINANCIAL DATA

AMOCO

    The following selected financial data for  Amoco, insofar as they relate  to
each  of the  years 1990  through 1994,  have been  derived from  annual audited
consolidated financial statements of Amoco, including the statement of financial
position at December 31, 1994 and 1993  and the related statement of income  and
statement  of changes in  financial position for the  three years ended December
31, 1994 and notes thereto. The selected financial data for the six months ended
June 30, 1995  and 1994  have been  derived from  unaudited condensed  financial
statements,  which  in  the  opinion  of  management,  include  all adjustments,
consisting only of normal recurring adjustments, necessary for a fair  statement
of the results for the unaudited interim periods.

<TABLE>
<CAPTION>
                                                       SIX MONTHS
                                                     ENDED JUNE 30,                    YEAR ENDED DECEMBER 31,
                                                  --------------------  -----------------------------------------------------
                                                    1995       1994       1994       1993       1992       1991       1990
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                                (MILLIONS OF DOLLARS, EXCEPT PER-SHARE AMOUNTS)
<S>                                               <C>        <C>        <C>        <C>        <C>        <C>        <C>
INCOME STATEMENT DATA
  Revenues (including excise taxes).............  $  15,277  $  14,800  $  30,362  $  28,617  $  28,219  $  28,296  $  31,581
  Operating profit..............................  $   1,678  $   1,192  $   2,612  $   3,046  $   1,414  $   2,413  $   3,928
  Net income*...................................  $   1,056  $     808  $   1,789  $   1,820  $     850  $   1,173  $   1,913
  Net income per share*.........................  $    2.13  $    1.63  $    3.60  $    3.66  $    1.71  $    2.36  $    3.77
  Cash dividends per share......................  $    1.20  $    1.10  $    2.20  $    2.20  $    2.20  $    2.20  $    2.04

BALANCE SHEET DATA--AT PERIOD END
  Current assets................................  $   5,834  $   6,349  $   6,642  $   6,094  $   5,795  $   6,393  $   8,216
  Total assets..................................  $  28,922  $  28,836  $  29,316  $  28,486  $  28,453  $  30,510  $  32,209
  Current liabilities...........................  $   4,570  $   5,269  $   5,024  $   5,343  $   4,985  $   6,557  $   6,799
  Long-term debt................................  $   4,223  $   4,124  $   4,387  $   4,037  $   5,005  $   4,470  $   5,012
  Deferred credits..............................  $   5,630  $   5,467  $   5,508  $   5,420  $   5,373  $   5,174  $   6,079
  Shareholders' equity..........................  $  14,484  $  13,962  $  14,382  $  13,665  $  12,960  $  14,156  $  14,068
  Shareholders' equity per share................  $   29.50  $   28.11  $   28.97  $   27.53  $   26.11  $   28.52  $   28.02
<FN>
- ------------------------------
*  Excludes cumulative effects of accounting  charges of $(924) million in 1992,
  or $(1.86) per share, and $311 million in 1991, or $.62 per share.
</TABLE>

                                       5
<PAGE>
AMOCO COMPANY

    The following selected  financial data  for Amoco Company,  insofar as  they
relate  to each of  the years 1990  through 1994, have  been derived from annual
audited consolidated financial statements of  Amoco, including the statement  of
financial  position at December 31,  1994 and 1993 and  the related statement of
income and statement of changes in financial position for the three years  ended
December  31, 1994 and  notes thereto. The  selected financial data  for the six
months ended June 30, 1995 and  1994 have been derived from unaudited  condensed
financial   statements,  which  in  the   opinion  of  management,  include  all
adjustments, consisting only  of normal recurring  adjustments, necessary for  a
fair statement of the results for the unaudited interim periods.

<TABLE>
<CAPTION>
                                                       SIX MONTHS
                                                     ENDED JUNE 30,                    YEAR ENDED DECEMBER 31,
                                                  --------------------  -----------------------------------------------------
                                                    1995       1994       1994       1993       1992       1991       1990
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                                             (MILLIONS OF DOLLARS)
<S>                                               <C>        <C>        <C>        <C>        <C>        <C>        <C>
INCOME STATEMENT DATA
  Revenues (including excise taxes).............  $  13,934  $  13,533  $  27,841  $  25,930  $  25,698  $  25,307  $  28,321
  Operating profit..............................  $   1,489  $   1,105  $   2,470  $   2,595  $   1,760  $   2,253  $   3,492
  Net income*...................................  $     948  $     938  $   1,878  $   1,803  $   1,226  $   1,227  $   1,998

BALANCE SHEET DATA--AT PERIOD END
  Current assets................................  $   4,552  $   4,965  $   5,399  $   4,383  $   4,644  $   5,187  $   6,792
  Total assets..................................  $  25,194  $  24,179  $  24,549  $  23,513  $  23,645  $  24,633  $  25,954
  Current liabilities...........................  $   3,382  $   3,910  $   4,142  $   3,976  $   3,949  $   4,939  $   5,488
  Long-term obligations**.......................  $   6,844  $   2,055  $   6,190  $   1,967  $   2,811  $   2,795  $   2,654
  Deferred credits..............................  $   4,688  $   4,469  $   4,584  $   4,441  $   4,257  $   3,531  $   5,195
  Minority interest.............................  $       7  $  --      $       5     --         --         --         --
  Shareholder's equity**........................  $  10,273  $  13,745  $   9,628  $  13,129  $  12,628  $  13,368  $  12,617
<FN>
- ------------------------------
 *  Excludes cumulative effects of accounting  charges of $(702) million in 1992
   and $1,143 million in 1991.
** The  increase in  long-term obligations,  and the  corresponding decrease  in
   shareholder's  equity, between  1993 and 1994  reflects dividends  in 1994 to
   Amoco of intercompany notes receivable from subsidiaries.
</TABLE>

                                       6
<PAGE>
THE COMPANY

    The following selected financial data for the Company have been derived from
the summarized financial data of the  Company, including such data appearing  in
the  Amoco  June  30, 1995  Form  10-Q and  the  Amoco  April 5,  1995  Form 8-K
incorporated by reference herein. Such  summarized financial data were  prepared
using U.S. accounting principles followed by Amoco in preparing its consolidated
financial statements.

<TABLE>
<CAPTION>
                                                    SIX MONTHS
                                                  ENDED JUNE 30,                 YEAR ENDED DECEMBER 31,
                                                 -----------------   -----------------------------------------------
                                                  1995      1994      1994      1993      1992      1991      1990
                                                 -------   -------   -------   -------   -------   -------   -------
                                                                        (MILLIONS OF DOLLARS)
<S>                                              <C>       <C>       <C>       <C>       <C>       <C>       <C>
INCOME STATEMENT DATA
  Revenues.....................................   $122      $ 80      $189      $208      $179      $209      $227
  Net income...................................   $ 44      $ 38      $ 76      $ 74      $ 95      $193      $147

BALANCE SHEET DATA--AT PERIOD END
  Current assets...............................   $113      $ 76      $ 97      $103      $ 27      $ 27      $ 54
  Total assets.................................   $398      $315      $349      $337      $260      $323      $280
  Current liabilities..........................   $ 60      $ 51      $ 58      $100      $  8      $ 11      $ 10
  Non-current liabilities......................   $103      $101      $100      $ 20      $ 18      $ 12      $  9
  Shareholder's equity.........................   $235      $163      $191      $217      $234      $300      $261
</TABLE>

                                USE OF PROCEEDS

    The net proceeds from sale of the Securities will be used by the Company, in
accordance   with  Article  36  of  the  Negotiable  Obligations  Law,  for  the
refinancing of indebtedness and other liabilities, investment in physical assets
located in Argentina and/or working capital purposes within Argentina.

    The specific use of proceeds from the sale of the Securities of each  series
will be set forth in the applicable Prospectus Supplement.

                                       7
<PAGE>
                           DESCRIPTION OF SECURITIES

    The  Securities are to be issued under  an Indenture to be entered into (the
"Indenture") among the Company, Amoco,  Amoco Company, The Chase Manhattan  Bank
(National   Association),   as  Trustee   (the  "Trustee"),   Co-Registrar  (the
"Co-Registrar") and Principal  Paying Agent (the  "Principal Paying Agent")  and
The  Chase Manhattan Bank, N.A. (Buenos  Aires), as Registrar (the "Registrar"),
and Paying Agent, a  copy of which  is filed as an  exhibit to the  Registration
Statement  of which this  Prospectus is a  part. The Chase  Manhattan Bank, N.A.
(Buenos Aires) will act as Paying Agent in Argentina (the Principal Paying Agent
and all other Paying Agents are  collectively referred to herein as the  "Paying
Agents").  The  Trustee has  appointed The  Chase  Manhattan Bank,  N.A. (Buenos
Aires), presently at Calle Arenales 707,  Piso 5, 1061 Buenos Aires,  Argentina,
as  its  agent (the  "Trustee's Representative")  in the  City of  Buenos Aires,
Argentina to receive  notices on  its behalf in  Argentina from  Holders of  the
Securities and to act on the Trustee's behalf as necessary.

    The  Securities may be issued  from time to time in  one or more series. The
particular terms of each series which are offered by a Prospectus Supplement and
the related  guarantees thereof  by the  Guarantors (the  "Guarantees") will  be
described in such Prospectus Supplement.

    The  following  summaries  of certain  provisions  of the  Indenture  do not
purport to be complete and are subject,  and are qualified in their entirety  by
reference,  to all  the provisions of  the Indenture,  including the definitions
therein of certain  terms, and,  with respect  to any  particular Securities  or
Guarantees,  to the description of the  terms thereof included in the Prospectus
Supplement relating thereto.  References in  italics to section  numbers are  to
Sections of the Indenture.

GENERAL

    The  Indenture will provide that Securities in separate series may be issued
thereunder from time  to time in  a maximum aggregate  principal amount of  U.S.
$200,000,000  or the U.S.  dollar equivalent in one  or more foreign currencies.
The original issuance of any  Securities of a series  shall occur prior to  July
13, 2000. The Securities of each series shall have the same original issue date.
The Company, the Argentine Branch, Amoco and Amoco Company may specify a maximum
aggregate  principal amount for the Securities of any series. (SECTION 301.) The
Securities are to have such terms and provisions which are not inconsistent with
the Indenture, including as to maturity, principal and interest, as the Company,
the Argentine Branch, Amoco and Amoco Company may determine. The Securities  and
the  related Guarantees  are issued  in the  English language.  The text  of the
Securities and  the related  Guarantees  has been  translated into  the  Spanish
language  (a copy  of which Spanish  translations are annexed  thereto), and the
Company confirms  that such  Spanish  translations are  true and  accurate.  The
Securities  will be unsecured obligations of the  Company, will rank on a parity
with all other unsecured and unsubordinated indebtedness of the Company and will
be jointly and severally guaranteed by Amoco and Amoco Company. See  "Guarantees
by Amoco and Amoco Company".

    Securities,  which will be issued only  by the Company through its Argentine
Branch, will constitute obligations  of the Company as  a whole. Securities  may
not be issued directly by either Guarantor under the Indenture.

    The  applicable Prospectus Supplement will set  forth the price or prices at
which the  Securities  to  be offered  will  be  issued and  will  describe  the
following terms of such Securities:

    (1) the title of such Securities;

    (2)  any limit on the  aggregate principal amount of  the Securities of such
series;

    (3) whether such  Securities are  to be issuable  as Registered  Securities,
Bearer Securities or both, whether such Securities will be issuable initially in
temporary  global form, any  date, or the  manner of determination  of any date,
prior to  which interests  in any  such  temporary global  security may  not  be
exchanged  for definitive Securities and the extent  to which, and the manner in
which, any interest on such temporary  global security may be paid, and  whether
any  such Securities  are to be  issuable in  permanent global form  and, if so,
whether beneficial owners of interests in any such permanent global Security may

                                       8
<PAGE>
exchange such interests for such Securities of such series and of like tenor  of
any  authorized form and denomination and the circumstances under which any such
exchanges may  occur, if  other  than as  described  under "Form,  Exchange  and
Transfer";

    (4)  the Person to whom and the  manner in which interest on such Securities
will be payable, and the extent to  which, or the manner in which, any  interest
payable  on a temporary global Security on an Interest Payment Date will be paid
if  other  than  in  the   manner  described  under  "Temporary  Bearer   Global
Securities";

    (5)  the date or dates on which the principal of and premium, if any, on any
of such Securities will be  payable (the final date of  which shall be not  less
than  90 days nor more than  30 years from the date  of original issuance of the
Securities of such series);

    (6) the rate or rates at which any of such Securities will bear interest, if
any, or the manner  of calculating such  rate or rates, the  date or dates  from
which  any such interest  will accrue, the  Interest Payment Dates  on which any
such interest will be payable and the Regular Record Date for any such  interest
payable on any Registered Securities on any Interest Payment Date;

    (7)  the place or places in addition  to the City of Buenos Aires, Argentina
where the principal of and any  premium, interest and Additional Amounts on  any
of such Securities will be payable, any Registered Securities may be surrendered
for  registration  of  transfer,  any such  Securities  may  be  surrendered for
exchange and notices and demands to or upon the Company, Amoco and Amoco Company
in respect of any such Securities may be served;

    (8) if  other than  as set  forth under  "Redemption for  Tax Reasons",  the
period  or periods within which, the price or  prices at which and the terms and
conditions on which any of such Securities may be redeemed, in whole or in part,
at the option of the Company;

    (9) the obligation, if any, of the Company to redeem, purchase or repay  any
of such Securities pursuant to any sinking fund or analogous provision or at the
option  of the Holder thereof, and the period or periods within which, the price
or prices at which and the terms and conditions on which any of such  Securities
will be redeemed, purchased or repaid, in whole or in part, pursuant to any such
obligation;

   (10)  if other  than denominations of  U.S. $1,000 and  any integral multiple
thereof, the denominations in which any Securities will be issuable;

   (11) if the amount of principal of or any premium or interest on any of  such
Securities  may  be determined  with  reference to  an  index or  pursuant  to a
formula, the manner in which such amounts will be determined;

   (12) if other  than the  U.S. dollar,  the currency,  currencies or  currency
units  in which  the principal  of or  any premium  or interest  on any  of such
Securities will be payable (and the manner of determining the equivalent thereof
in U.S. dollars for  any purpose, including for  the purpose of determining  the
principal amount deemed to be Outstanding at any time);

   (13) if the principal of or any premium or interest on any of such Securities
is  to be payable, at the election of  the Company or the Holder thereof, in one
or more currencies or currency units  other than those in which such  Securities
are  stated to be payable,  the currency, currencies or  currency units in which
payment of any such amount  as to which such election  is made will be  payable,
the  periods within which and the terms  and conditions upon which such election
is to be made and the amount so  payable (or the manner in which such amount  is
to be determined);

   (14)  if other than the  entire principal amount thereof,  the portion of the
principal  amount  of  any  of  such  Securities  which  will  be  payable  upon
declaration of acceleration of the Maturity thereof;

   (15)  if the principal amount  payable at the Stated  Maturity of any of such
Securities will not be  determinable as of  any one or more  dates prior to  the
Stated  Maturity, the amount which will be deemed to be such principal amount as
of any such date for any  purpose, including the principal amount thereof  which

                                       9
<PAGE>
will  be due  and payable upon  any Maturity  other than the  Stated Maturity or
which will be  deemed to be  Outstanding as of  any such date  (or, in any  such
case, the manner in which such deemed principal amount is to be determined);

   (16) if applicable, that such Securities, in whole or any specified part, are
defeasible   pursuant  to  the  provisions  of  the  Indenture  described  under
"Defeasance and Covenant Defeasance -- Defeasance and Discharge" or  "Defeasance
and  Covenant Defeasance -- Defeasance of Certain Covenants", or under both such
captions;

   (17) whether any Registered Securities will  be issuable in whole or in  part
in  the  form  of one  or  more Global  Registered  Securities and,  if  so, the
respective Depositaries for such Global  Registered Securities, the form of  any
legend or legends to be borne by any such Global Registered Security in addition
to  or in lieu  of the legend  referred to under  "Global Registered Securities"
and, if different  from those  described under such  caption, any  circumstances
under  which any such Global Registered Security may be exchanged in whole or in
part for  Securities registered,  and  any transfer  of such  Global  Registered
Security  in whole or in  part may be registered, in  the names of Persons other
than the Depositary for such Global Registered Security or its nominee;

   (18) whether any legends will be stamped or imprinted on all or a portion  of
such  Securities, and  the terms  and conditions upon  which any  legends may be
removed;

   (19) any addition to or change in the Events of Default applicable to any  of
such  Securities and any  change in the right  of the Trustee  or the Holders to
declare the principal amount of any of such Securities due and payable;

   (20) the Guarantees of such Securities;

   (21) if other than as  set forth under "Certain  Covenants of the Company  --
Payment of Additional Amounts", whether and under what circumstances the Company
will  pay Additional Amounts on such Securities  and, if other than as set forth
under "Redemption for Tax Reasons", whether the Company will have the option  to
redeem such Securities rather than pay such Additional Amounts;

   (22)  whether, under what  circumstances and to what  extent the Company will
pay and indemnify the Holders of the  Securities of the series from and  against
any  Argentine individual  asset tax or  other tax,  if other than  as set forth
under "Certain Covenants of the Company  -- Payment of Additional Amounts",  and
whether  the Company will have the option  to redeem such Securities rather than
pay or indemnify such Holders from and against any such tax;

   (23) any addition to  or change in the  covenants in the Indenture  described
under "Certain Covenants of the Company" applicable to any of such Securities;

   (24)  any other  terms of  such Securities  not inconsistent  in any material
respect with the provisions of the Indenture; and

   (25)  any  trustees,  authenticating  or  paying  agents,  transfer   agents,
registrars  or any other agents or depositaries with respect to such Securities.
(SECTION 301.)

    The applicable Prospectus Supplement will also set forth the specific use of
proceeds  from  the   sale  of  such   Securities  and  information   concerning
governmental  and any other approvals or authorizations for the issue, offer and
sale of such Securities, including the relevant CNV authorization.

    Securities, including Original Issue Discount  Securities, may be sold at  a
substantial  discount below their principal amount. Certain special U.S. federal
income tax considerations (if any) applicable to Securities sold at an  original
issue  discount may  be described  in the  applicable Prospectus  Supplement. In
addition, certain special U.S.  federal income tax  or other considerations  (if
any)  applicable  to  any Securities  which  are  denominated in  a  currency or
currency unit  other  than U.S.  dollars  may  be described  in  the  applicable
Prospectus Supplement.

                                       10
<PAGE>
FORM, EXCHANGE AND TRANSFER

    Unless   otherwise  specified  in   the  applicable  Prospectus  Supplement,
Registered Securities of  a series shall  be issuable in  denominations of  U.S.
$1,000 and integral multiples thereof and Bearer Securities of a series shall be
issuable  in  denominations  of  U.S.  $1,000  and  integral  multiples thereof.
(SECTION 302.)

    At the option of the Holder, subject  to the terms of the Indenture and  the
limitations applicable to Global Registered Securities, Registered Securities of
each  series will  be exchangeable for  other Registered Securities  of the same
series of  any  authorized  denomination  and of  a  like  tenor  and  aggregate
principal  amount,  each  such  Registered Security  having  endorsed  thereon a
Guarantee. (SECTION 305.)

    Subject to the  terms of  the Indenture  and the  limitations applicable  to
Global  Registered  Securities,  Registered  Securities  may  be  presented  for
exchange as provided  above or for  registration of transfer  (duly endorsed  or
accompanied  by a  proper written instrument  of transfer duly  executed) at the
office of the Registrar or Co-Registrar. No service charge will be made for  any
registration  of transfer or exchange of  Registered Securities, but the Company
may require payment of a sum sufficient  to cover any tax or other  governmental
charge  payable  in  connection therewith.  Such  transfer or  exchange  will be
effected upon the Registrar or Co-Registrar, as the case may be, being satisfied
with the documents of title and identity  of the person making the request.  The
Company has appointed The Chase Manhattan Bank, N.A. (Buenos Aires) as Registrar
and  the  Trustee  as  Co-Registrar.  Any transfer  agent  (in  addition  to the
Registrar  and  Co-Registrar)  initially  designated  by  the  Company  for  any
Securities will be named in the applicable Prospectus Supplement. (SECTION 305.)
The  Company may at any time designate additional transfer agents or rescind the
designation of any  transfer agent  or approve a  change in  the office  through
which  any transfer  agent acts,  except that  the Company  will be  required to
maintain a transfer agent in  each Place of Payment  for the Securities of  each
series.  Unless otherwise specified in the applicable Prospectus Supplement, the
Company will maintain a  transfer agent in the  City of Buenos Aires,  Argentina
and in The City of New York. (SECTION 1002.)

    Unless  otherwise  provided  in  the  Bearer  Security  and  the  applicable
Prospectus Supplement,  all  Bearer  Securities  issued  as  part  of  the  same
identifiable  tranche (within the  meaning of Regulation  S under the Securities
Act of 1933, as amended (the "Securities Act")) will be initially represented by
a single temporary bearer global security (a "Temporary Bearer Global Security")
which will be deposited with a  common depositary for CEDEL, S.A. ("Cedel")  and
the  operator of the Euroclear System ("Euroclear"). Cedel and Euroclear, as the
case may  be, will  credit the  account of  each subscriber  with the  principal
amount of Bearer Securities being subscribed by it. The Company will irrevocably
undertake  to exchange  the Temporary  Bearer Global  Security for  a definitive
permanent  bearer  global  Security  (a  "Permanent  Bearer  Global   Security")
delivered  to a common depositary  for Euroclear or Cedel  upon the later of (i)
the date  which  is 40  days  after  the later  of  (A) the  completion  of  the
distribution  of such identifiable tranche of Bearer Securities as determined by
the Underwriters and  (B) the settlement  date for such  tranche (the  "Exchange
Date";  provided, however, that the Company  may, in its sole discretion, extend
the Exchange Date for such period of  time as the Company may deem necessary  in
order  to  ensure  that the  issuance  of  such identifiable  tranche  of Bearer
Securities is exempt  from registration under  the Securities Act  by virtue  of
Regulation  S thereunder) and (ii) the date on which Cedel or Euroclear provides
to the  Trustee  or  an  Authenticating Agent  the  requisite  certification  as
described under "Temporary Bearer Global Securities" below.

    Unless  otherwise  provided  in  the Bearer  Securities  and  the applicable
Prospectus Supplement, the Permanent Bearer Global Security will be exchangeable
for definitive Securities  in bearer form  with or without  coupons attached  or
Securities  in registered  form without coupons  attached upon not  less than 60
days' written notice to the Company  and the Trustee or an Authenticating  Agent
from  Cedel or Euroclear. Such notice shall specify whether the Permanent Bearer
Global  Security  is  to  be  exchanged  for  Bearer  Securities  or  Registered
Securities,  or both, the denominations in  which any Registered Securities will
be issued and the names in which such Registered Securities will be issued. Upon
receipt of such notice, the Company will  cause to be prepared for delivery  the
requested  Bearer  Securities  and/or Registered  Securities,  in  the specified
denominations and in the specified names.

                                       11
<PAGE>
    Unless otherwise  provided  in  the Bearer  Securities  and  the  applicable
Prospectus  Supplement, at the option of the Holder, Bearer Securities (with all
unmatured coupons  appertaining  thereto)  will  be  exchangeable  into  a  like
aggregate  principal  amount  of  Registered Securities  of  like  tenor. Bearer
Securities will not be  issued in exchange  for Registered Securities.  (SECTION
305.)  Each Security authenticated  and delivered upon  any transfer or exchange
for or in  lieu of the  whole or  any part of  any Security will  carry all  the
rights,  if any, to interest accrued and unpaid and to accrue which were carried
by the whole or such part of such Security. (SECTION 307.) Such new Security, if
a Registered Security, will be  so dated, and, if  a Bearer Security, will  have
attached  thereto  such coupons,  that neither  gain nor  loss in  interest will
result from such transfer or exchange.

    Bearer Securities will be subject  to certain requirements and  restrictions
imposed  by U.S. federal tax laws  and regulations. See "Limitations on Issuance
of Bearer Securities".

    Argentine Entities  (as defined  under "Taxation  -- Argentine  Taxation  --
Withholding  Tax on Interest Payments")  must, in the case  of the Securities of
any series,  hold  such  Securities  in  the form  of  one  or  more  definitive
Registered  Securities and not in the form  of Bearer Securities or interests in
Global Bearer  Securities  or Global  Registered  Securities. See  "Taxation  --
Argentine Taxation".

    If  the Securities of any series (or  of any series and specified tenor) are
to be redeemed in part, the Company will not be required to (i) issue,  register
the  transfer of or exchange any Security of  that series (or of that series and
specified tenor, as the case may be) during a period beginning at the opening of
business 15  days  before any  selection  of Securities  of  that series  to  be
redeemed  and ending at the close of business on (A) if Securities of the series
are issuable  only as  Registered Securities,  the  day of  the mailing  of  the
relevant  notice of redemption and (B) if  Securities of the series are issuable
as Bearer Securities, the day of the first publication of the relevant notice of
redemption or,  if Securities  of the  series are  also issuable  as  Registered
Securities  and there is no  publication, the mailing of  the relevant notice of
redemption, or (ii) register the transfer of or exchange any Registered Security
so selected for redemption, in whole  or in part, except the unredeemed  portion
of  any  such Security  being redeemed  in  part, or  (iii) exchange  any Bearer
Security so selected for  redemption except that such  a Bearer Security may  be
exchanged for a Registered Security of that series and like tenor, provided that
such  Registered Security  shall be  simultaneously surrendered  for redemption.
(SECTION 305.)

GLOBAL REGISTERED SECURITIES

    Some or all of the Registered  Securities of any series may be  represented,
in whole or in part, by one or more Global Registered Securities which will have
an  aggregate  principal  amount  equal to  that  of  the  Registered Securities
represented thereby. Each Global Registered  Security will be registered in  the
name  of  a  Depositary  or  a  nominee  thereof  identified  in  the applicable
Prospectus Supplement, will be  deposited with such Depositary  or nominee or  a
custodian  therefor  and  will  bear  a  legend  regarding  the  restrictions on
exchanges and registration of  transfer thereof referred to  below and any  such
other matters as may be provided for pursuant to the Indenture.

    Notwithstanding  any provision  of the  Indenture or  any Security described
herein, no Global Registered Security may be  exchanged in whole or in part  for
Securities  registered, and no transfer of a Global Registered Security in whole
or in  part  may be  registered,  in  the name  of  any Person  other  than  the
Depositary for such Global Registered Security or any nominee of such Depositary
unless (i) the Depositary has notified the Company, Amoco and Amoco Company that
it  is unwilling or unable to continue  as Depositary for such Global Registered
Security or  has ceased  to be  qualified  to act  as such  as required  by  the
Indenture,  (ii) there shall have occurred and be continuing an Event of Default
with respect to the Registered Securities represented by such Global  Registered
Security,  (iii) the Person who  is the beneficial owner  of an interest in such
Global Registered Security notifies the Registrar or the Co-Registrar in writing
that it is  an Argentine Entity  (or other  Argentine Person who  is subject  to
Taxes  imposed or established by Argentina  or any political subdivision thereof
or taxing  authority  therein  with  respect  to  payments  in  respect  of  the
Securities  and as to  which the Company  has a withholding  obligation) and is,
therefore, required to  hold Securities in  the form of  one or more  definitive
Registered Securities, or (iv) there shall exist such

                                       12
<PAGE>
circumstances, if any, in addition to or in lieu of those described above as may
be  described in the applicable Prospectus Supplement. All Registered Securities
issued in exchange for a Global Registered Security or any portion thereof  will
be  registered in  such names  as the Depositary  may direct.  (SECTIONS 204 AND
305.)

    As long as the  Depositary, or its  nominee, is the  registered Holder of  a
Global  Registered Security, the Depositary or such nominee, as the case may be,
will be considered the sole owner and Holder of such Global Registered  Security
and  the Registered  Securities represented thereby  for all  purposes under the
Registered Securities and  the Indenture.  Except in  the limited  circumstances
referred  to  above,  owners  of beneficial  interests  in  a  Global Registered
Security will not  be entitled to  have such Global  Registered Security or  any
Registered  Securities represented thereby  registered in their  names, will not
receive or be entitled to  receive physical delivery of certificated  Registered
Securities  in exchange therefor and will not  be considered to be the owners or
Holders  of  such  Global  Registered  Security  or  any  Registered  Securities
represented  thereby  for any  purpose under  the  Registered Securities  or the
Indenture. All payments of principal of and any premium and interest on a Global
Registered Security will be made to the  Depositary or its nominee, as the  case
may  be, as  the Holder  thereof. The  laws of  some jurisdictions  require that
certain purchasers of securities  take physical delivery  of such securities  in
definitive  form.  These  laws may  impair  the ability  to  transfer beneficial
interests in a Global Registered Security.

    Ownership of beneficial interests  in a Global  Registered Security will  be
limited  to institutions that  have accounts with the  Depositary or its nominee
("participants") and  to  persons that  may  hold beneficial  interests  through
participants. In connection with the issuance of any Global Registered Security,
the  Depositary will credit, on its book-entry registration and transfer system,
the respective principal  amounts of  Registered Securities  represented by  the
Global  Registered Security  to the accounts  of its  participants. Ownership of
beneficial interests in a Global Registered Security will be shown only on,  and
the transfer of those ownership interests will be effected only through, records
maintained  by the Depositary  (with respect to  participants' interests) or any
such participant (with respect to interests of persons held by such participants
on their behalf). Payments, transfers,  exchanges and other matters relating  to
beneficial  interests in a Global Registered  Security may be subject to various
policies and procedures adopted by the Depositary from time to time. NONE OF THE
COMPANY, AMOCO, AMOCO COMPANY, THE TRUSTEE  OR ANY AGENT OF THE COMPANY,  AMOCO,
AMOCO  COMPANY OR THE TRUSTEE WILL HAVE  ANY RESPONSIBILITY OR LIABILITY FOR ANY
ASPECT OF THE  DEPOSITARY'S OR  ANY PARTICIPANT'S  RECORDS RELATING  TO, OR  FOR
PAYMENTS  MADE  ON  ACCOUNT  OF, BENEFICIAL  INTERESTS  IN  A  GLOBAL REGISTERED
SECURITY, OR FOR MAINTAINING, SUPERVISING  OR REVIEWING ANY RECORDS RELATING  TO
SUCH BENEFICIAL INTERESTS.

    Secondary  trading in notes and debentures of corporate issuers is generally
settled in clearing-house or next-day  funds. In contrast, beneficial  interests
in  a Global Registered Security,  in some cases, may  trade in the Depositary's
same-day funds settlement system, in which secondary market trading activity  in
those  beneficial interests  would be  required by  the Depositary  to settle in
immediately available funds.  There is no  assurance as to  the effect, if  any,
that settlement in immediately available funds would have on trading activity in
such   beneficial  interests.  Also,  settlement  for  purchases  of  beneficial
interests in a Global Registered Security upon the original issuance thereof may
be required to be made in immediately available funds.

PAYMENT AND PAYING AGENTS

    Unless otherwise indicated in the applicable Prospectus Supplement,  payment
of  interest on a Registered Security on  any Interest Payment Date will be made
to the Person in whose name such Registered Security (or one or more Predecessor
Securities) is registered at  the close of business  on the Regular Record  Date
for such interest. (SECTION 307.)

    Unless   otherwise  indicated  in   the  applicable  Prospectus  Supplement,
principal of and  any premium  and interest on  the Registered  Securities of  a
particular  series will be payable  at the office of  the Principal Paying Agent
or, subject  to  any other  fiscal  or  other laws  and  regulations  applicable
thereto,  such Paying Agent  or Paying Agents  as the Company  may designate for
such purpose from time to time, except that at the option of the Company payment
of any  interest may  be made  by  check mailed  to the  address of  the  Person
entitled  thereto  as  such address  appears  in the  Security  Register. Unless
otherwise indicated in the applicable

                                       13
<PAGE>
Prospectus Supplement, the corporate trust office of the Trustee in The City  of
New York and the office of the Paying Agent located in the City of Buenos Aires,
Argentina  will be  designated as  the Company's  sole agents  for payments with
respect to  Registered  Securities  of  each series.  Any  other  Paying  Agents
initially  designated  by  the  Company  for  the  Registered  Securities  of  a
particular series will  be named  in the applicable  Prospectus Supplement.  The
Company  may  at any  time  designate additional  Paying  Agents or  rescind the
designation of any Paying Agent or approve a change in the office through  which
any  Paying Agent acts, except  that the Company will  be required to maintain a
Paying Agent  in  each Place  of  Payment for  the  Registered Securities  of  a
particular  series.  Unless  otherwise specified  in  the  applicable Prospectus
Supplement, the  Company will  maintain a  Paying Agent  in the  City of  Buenos
Aires,  Argentina and  in The  City of New  York for  the Registered Securities.
(SECTION 1002.)

    The principal of and any premium  and interest on a Temporary Bearer  Global
Security  and  a  Permanent Bearer  Global  Security  will be  paid  to  each of
Euroclear and Cedel with respect to that portion of such Temporary Bearer Global
Security or Permanent Bearer Global Security  held for its account. The  Company
understands  that in accordance  with current operating  procedures of Euroclear
and Cedel each of Euroclear and Cedel will credit such principal and any premium
and interest received by it in respect of a Temporary Bearer Global Security  or
Permanent  Bearer Global Security to the  respective accounts of the persons who
on its  records are  owners of  beneficial interests  in such  Temporary  Bearer
Global Security or Permanent Bearer Global Security. If a Registered Security is
issued  in exchange for any portion of  a Permanent Bearer Global Security after
the close of business at the office or agency where such exchange occurs on  (i)
any  regular record date  and before the  opening of business  at such office or
agency on the relevant  Interest Payment Date, or  (ii) any special record  date
and  before the  opening of  business at  such office  or agency  on the related
proposed date for payment of defaulted interest, interest or defaulted interest,
as the  case may  be, will  not  be payable  on such  Interest Payment  Date  or
proposed  date for payment,  as the case  may be, in  respect of such Registered
Security, but will be payable on such Interest Payment Date or proposed date for
payment, as  the case  may be,  only to  Euroclear and  Cedel, and  the  Company
understands  that Euroclear  and Cedel will  undertake in  such circumstances to
credit such interest to the account of  the person who was the beneficial  owner
of  such portion of such Permanent Bearer Global Security on such regular record
date or special record date, as the case may be. (SECTION 305.)

    Unless otherwise  indicated  in  the  Bearer  Security  and  the  applicable
Prospectus  Supplement, payment  of any  interest on  Bearer Securities  will be
payable by check upon surrender of  any applicable coupon, and principal of  and
any premium on Bearer Securities will be payable by check upon surrender of such
Securities, at such offices or agencies outside the United States as the Company
may  from time to time designate; PROVIDED,  that no interest will be payable on
any Bearer Security  (including a  Temporary Bearer Global  Security) until  the
Owner  Tax Certification described under  "Temporary Bearer Global Securities --
Certifications" is  delivered  to Euroclear  or  Cedel and  Euroclear  or  Cedel
delivers  the  Depositary Tax  Certification  described under  "Temporary Bearer
Global Securities  -- Interest  Payment  Date Prior  to  Exchange Date"  to  the
Company  or its agent.  No payment with  respect to any  Bearer Security will be
made at any office or agency in the United States or its possessions or by check
mailed to any address in the United States or its possessions or by transfer  to
an  account  maintained  with  a  bank  located  in  the  United  States  or its
possessions. (SECTIONS 304 AND 305.) Notwithstanding the foregoing, payments  of
principal  of and any premium  and interest on Bearer  Securities payable in U.S
dollars will be made in the United States  if (but only if) payment of the  full
amount  thereof in U.S. dollars  at the office of  each Paying Agent outside the
United States appointed and maintained by the Company is illegal or  effectively
precluded by exchange controls or other similar restrictions.

    Bearer Securities called or presented for redemption should be presented for
payment  of the applicable redemption price together with all unmatured coupons.
Amounts due in respect  of any missing unmatured  coupons will be deducted  from
the  sum due  for payment. Interest  due on or  prior to the  redemption date on
Bearer Securities will be payable only  upon the surrender of the  corresponding
coupons. (SECTION 1106.)

    All  moneys paid by the Company, Amoco  or Amoco Company to any Paying Agent
for the  payment of  the principal  of or  any premium,  interest or  Additional
Amounts  on any Security which remain unclaimed  at the end of three years after
such principal,  premium, interest  or  Additional Amounts  has become  due  and

                                       14
<PAGE>
payable  will be repaid to the Company, Amoco  or Amoco Company, as the case may
be, and the Holder  of such Security  thereafter may look  only to the  Company,
Amoco and Amoco Company for payment thereof. (SECTION 1003.)

GUARANTEES BY AMOCO AND AMOCO COMPANY

    Amoco  and  Amoco Company  will each  jointly and  severally unconditionally
guarantee the due and punctual payment of the principal of (and premium, if any)
and interest, if any, on the Securities, and the due and punctual payment of any
sinking fund or analogous payments (including all Additional Amounts), when  and
as  the same shall become due and payable, whether at maturity, upon redemption,
by declaration  of acceleration  or otherwise.  Holders of  Securities need  not
exhaust  their recourse against the Company prior to proceeding against Amoco or
Amoco Company under their respective  Guarantees and may proceed against  either
or both of Amoco or Amoco Company. (SECTION 1401.)

    The  Guarantees will be direct,  unsecured and unsubordinated obligations of
Amoco and Amoco Company and will  rank equally and ratably with other  unsecured
and unsubordinated indebtedness of Amoco or Amoco Company, as the case may be.

CERTAIN COVENANTS OF THE COMPANY

    PAYMENT  OF ADDITIONAL AMOUNTS.   The Company will pay  to the Holder of any
Security of a series  or any coupon appertaining  thereto additional amounts  as
provided  in the next paragraph  and will also pay  any other additional amounts
provided for in the Securities of a series and in accordance with the  Indenture
(such  additional  amounts provided  in the  next paragraph  and any  such other
additional amounts  provided for  in the  Securities of  a series  being  herein
referred to as "Additional Amounts").

    All  payments in respect  of the Securities,  including, without limitation,
payments of  principal, interest,  and premium,  if any,  shall be  made by  the
Company  without withholding or deduction for or  on account of any Taxes now or
hereafter imposed or established by or  on behalf of Argentina or any  political
subdivision  thereof or taxing authority therein,  except as otherwise set forth
below. In the event any  such Taxes are so  imposed or established, the  Company
shall  pay such  Additional Amounts as  may be  necessary in order  that the net
amounts receivable by the Holders after any withholding or deduction in  respect
of  such Taxes  shall equal  the respective  amounts of  principal, interest and
premium, if any, which would have  been receivable in respect of the  Securities
in the absence of such withholding or deduction; PROVIDED, HOWEVER, that no such
Additional  Amounts shall be payable (i) to, or on behalf of, a Holder for or on
account of any such Taxes that have been imposed by reason of the Holder being a
resident of Argentina or  having some connection with  Argentina other than  the
mere  holding or owning of any Security  or the receipt of principal or interest
or premium, if any, in respect thereof, (ii)  to, or on behalf of, a Holder  for
or  on account of  any such Taxes that  would not have been  imposed but for the
presentation by the  Holder of  a Security  for payment  (where presentation  is
required)  on a  date more  than 30 days  after the  date on  which such payment
became due and payable  or the date  on which payment  thereof is duly  provided
for,  whichever occurs later,  except to the  extent that the  Holder would have
been entitled to such Additional Amounts on presenting such Security for payment
on the last date of  such period of 30 days,  (iii) with respect to any  estate,
inheritance,  gift, sales, transfer, asset or personal property tax (other than,
to the extent provided in respect of  the Securities of a series, any  Argentine
individual  asset tax  imposed on or  paid by  the Holders) or  any similar tax,
assessment or governmental charge, (iv) to, or on behalf of, a Holder for or  on
account  of any such  Taxes which are  payable otherwise than  by withholding or
deduction from payments  on or  in respect  of any Security,  or (v)  to, or  on
behalf of, a Holder of any Security to the extent that such Holder is liable for
such  Taxes that would not have been imposed  but for the failure of such Holder
to comply with any certification, identification, information, documentation  or
other  reporting requirements  if (a) such  compliance is  required by Argentine
law, regulation  or  administrative  practice  or any  applicable  treaty  as  a
precondition  to  exemption from,  or  reduction in  the  rate of,  deduction or
withholding of, such Taxes,  (b) at least  30 days prior  to the first  Interest
Payment  Date with respect  to which such requirements  shall apply, the Company
shall have notified  all Holders  of the Securities  that such  Holders will  be
required  to comply  with such  requirements and  (c) such  requirements are not
materially more  onerous  to such  Holders  (in form,  in  procedure or  in  the
substance  of  information  disclosed)  than  comparable  information  or  other
reporting requirements imposed under U.S.

                                       15
<PAGE>
tax law, regulation and administrative practice (such as IRS Forms 1001, W-8 and
W-9). Furthermore,  no Additional  Amounts shall  be paid  with respect  to  any
payment  on a Security to  a Holder that is a  fiduciary or partnership or other
than the sole beneficial owner of such payment to the extent that a  beneficiary
or  settlor with respect  to such fiduciary  or a member  of such partnership or
beneficial owner would not have been entitled to receive the Additional  Amounts
had  such beneficiary, settlor, member or  beneficial owner been the Holder. Any
reference herein or  in the  Securities to  principal and/or  interest shall  be
deemed  also to refer to  any Additional Amounts which  may be payable under the
undertakings described in this paragraph.

    The Company will  also pay  any stamp, issue,  registration, documentary  or
other  similar taxes  and duties, including  interest and  penalties, payable in
Argentina or any political  subdivision thereof or  taxing authority therein  in
respect  of the  creation, issuance and  initial offering of  the Securities. In
addition, the Company will, to the extent provided in respect of the  Securities
of  a series  (and indicated in  the applicable Prospectus  Supplement), pay and
indemnify the  Holders  from and  against  any Argentine  individual  asset  tax
imposed  on  or paid  by  the Holders.  Furthermore,  the Company  will  pay and
indemnify the  Holders from  and against  all  court taxes  or other  taxes  and
duties,  including interest and penalties, imposed on  or paid by any of them in
Argentina in connection with any action permitted to be taken by the Holders  to
enforce  the obligations of the Company under the Securities; PROVIDED, HOWEVER,
the Company will not be required to pay or indemnify the Holders for such  court
taxes  and  other  taxes and  duties  to the  extent  that the  Holders  are not
successful in enforcing such obligations of the Company. (SECTION 1007.)

    MAINTENANCE OF  OFFICE  OR  AGENCY.    Unless  otherwise  indicated  in  the
applicable  Prospectus Supplement, the Company will maintain in each of the City
of Buenos Aires, Argentina and  The City of New York  an office or agency  where
the  Registered Securities  of any  series may  be presented  or surrendered for
payment (including payment of  Additional Amounts), where Registered  Securities
of  that  series may  be  surrendered for  registration  of transfer,  where the
Securities may be surrendered for exchange  and where notices and demands to  or
upon  the Company in respect of the  Securities and the Indenture may be served.
If the Securities  are issued  as Bearer Securities,  the applicable  Prospectus
Supplement  will set  forth the  place or places  where such  Securities and any
coupons  may  be  surrendered  for  payment  (including  payment  of  Additional
Amounts),  where  such  Securities may  be  surrendered for  exchange  and where
notices and demands to or upon the Company in respect of such Securities and the
Indenture may be served. (SECTION 1002.)

    CONSOLIDATION, MERGER  AND  SALE  OF  ASSETS.   The  Company  may  merge  or
consolidate with, or sell or convey all or substantially all of its property to,
any  other corporation if (except  in the sale or  conveyance to any Subsidiary)
such other  corporation  assumes  the  obligations  of  the  Company  under  the
Securities and the Indenture and if immediately after the merger, consolidation,
conveyance  or sale, the Company or such successor corporation is not in default
in the performance  of any  covenants or obligations  of the  Company under  the
Indenture  or the Securities. EACH  HOLDER OF SECURITIES OF  ANY SERIES SHALL BE
DEEMED TO  HAVE  IRREVOCABLY  WAIVED,  TO THE  FULLEST  EXTENT  PERMITTED  UNDER
APPLICABLE  LAW,  ITS RIGHTS  AS  A CREDITOR  OF THE  COMPANY  BY VIRTUE  OF ITS
OWNERSHIP OR HOLDING  OF SUCH  SECURITIES TO  OPPOSE OR  TO TAKE  ANY ACTION  TO
OPPOSE  ANY SUCH CONSOLIDATION, MERGER, SALE  OR CONVEYANCE UNDER ARGENTINE LAW.
(SECTION 801.)

CERTAIN COVENANTS OF AMOCO AND AMOCO COMPANY

    The Indenture  will  not  limit  the  amount  of  debt,  either  secured  or
unsecured, which may be issued by Amoco or Amoco Company.

    LIMITATION  ON LIENS.  Amoco Company will  covenant in the Indenture that it
will not, nor  will it  permit any Restricted  Subsidiary to,  issue, assume  or
guarantee  any Debt if such Debt is secured by a Mortgage upon (i) any Producing
Property, (ii) any  Refining or Manufacturing  Property or (iii)  any shares  of
stock  or indebtedness  of any Restricted  Subsidiary, without in  any such case
effectively providing, concurrently with  the issuance, assumption or  guarantee
of  any such Debt, that the Securities (together with, if Amoco Company shall so
determine, any other indebtedness  of, or guaranteed by,  Amoco Company or  such

                                       16
<PAGE>
Restricted  Subsidiary ranking equally with the  Securities and then existing or
thereafter created) shall be secured equally and ratably with (or prior to) such
Debt, so long  as such Debt  shall be  so secured; PROVIDED,  HOWEVER, that  the
foregoing restriction shall not apply to:

        (i)  Mortgages existing  as of  the date  of the  first issuance  by the
    Company of the Securities of any series;

        (ii) Mortgages  on property,  shares  of stock  or indebtedness,  or  in
    respect  of  indebtedness,  of any  corporation  existing at  the  time such
    corporation becomes a Restricted Subsidiary, or arising thereafter  pursuant
    to contractual commitments entered into prior to and not in contemplation of
    such corporation becoming a Restricted Subsidiary;

       (iii)  Mortgages  on property,  shares of  stock  or indebtedness,  or in
    respect of  indebtedness,  existing  at  the  time  of  acquisition  thereof
    (including  acquisition through  merger, amalgamation  or consolidation), or
    arising thereafter pursuant to contractual commitments entered into prior to
    and not in  contemplation of the  acquisitions of such  property, shares  of
    stock or indebtedness;

        (iv)  Mortgages securing the payment of all  or any part of the purchase
    price of any property or securing any Debt incurred prior to, at the time of
    or within 90 days after the acquisition of such property for the purpose  of
    financing  all  or any  part of  the purchase  price thereof  (provided such
    Mortgages are limited to such property and improvements thereon);

        (v) Mortgages which secure Debt  owing by any Restricted Subsidiary,  to
    the Company, Amoco, Amoco Company or to a Restricted Subsidiary;

        (vi)  Mortgages on any  Producing Property or  Refining or Manufacturing
    Property to secure all  or any part of  the cost of surveying,  exploration,
    mining,  drilling, extraction, development, construction, alteration, repair
    or improvement of all or any part thereof, or to secure Debt incurred  prior
    to,  at  the  time of  or  within 12  months  after the  completion  of such
    surveying,   exploration,   mining,   drilling,   extraction,   development,
    construction, alteration, repair or improvement, whichever is later, for the
    purpose  of financing all or any part  of such cost (provided such Mortgages
    are limited to such property and improvements thereon);

       (vii) Mortgages securing Debt  in respect of  commitments of purchase  or
    sale of, or the transportation or distribution of, products derived from the
    property so mortgaged;

      (viii)  Mortgages on personal property, other  than on any shares of stock
    or indebtedness of any Restricted Subsidiary;

        (ix) Mortgages securing Debt  incurred in connection with  environmental
    law  obligations  imposed by  or  pursuant to  legislative,  governmental or
    regulatory authority;

        (x) Mortgages in favor of or at the request of the United States or  any
    state  or territory thereof, or any other country or any department, agency,
    instrumentality or political  subdivision of  any such  jurisdiction, or  in
    favor  of holders  of securities  issued by  any such  entity, securing Debt
    owing thereto or partial, progress, advance or other payments or performance
    pursuant to the provisions  of any contract, subcontract  or statute, or  to
    secure  any indebtedness  incurred for the  purpose of financing  all or any
    part of any purchase price or cost of constructing or improving the property
    subject thereto, including, without limitation, any Mortgages securing  Debt
    issued,  assumed or guaranteed in industrial development, pollution control,
    or similar revenue bonds;

        (xi) Mortgages arising by reason of any judgment, decree or order of any
    court, so long  as any  appropriate legal  proceedings which  may have  been
    initiated  for the review of  such judgment, decree or  order shall not have
    been finally  terminated  or  so  long  as  the  period  within  which  such
    proceedings  may be initiated  shall not have  expired, or by  reason of any
    deposit or pledge  with any  surety company  or clerk  of any  court, or  in
    escrow,  as collateral in connection with, or in lieu of, any bond on appeal
    from

                                       17
<PAGE>
    any judgment or decree against Amoco Company or any Restricted Subsidiary or
    in connection with other proceedings  or actions at law  or in equity by  or
    against Amoco Company or any Restricted Subsidiary;

       (xii) Mortgages on current assets to secure Debt incurred in the ordinary
    course  of business and maturing  not more than twelve  months from the date
    incurred; and

      (xiii) any extension,  renewal, alteration or  replacement (or  successive
    extensions,  renewals, alterations or replacements), in whole or in part, of
    any Mortgage  referred  to  in  the  foregoing  clauses  (i)  through  (xii)
    inclusive;  provided that the principal amount of Debt secured thereby shall
    not materially exceed the principal amount of Debt so secured at the time of
    such extension, renewal, alteration or replacement and that such  extension,
    renewal,  alteration or replacement shall be limited to all or a part of the
    property (plus improvements on such property) which secured the Mortgage  so
    extended, renewed, altered or replaced.

    Notwithstanding  the foregoing, Amoco Company and any one or more Restricted
Subsidiaries may  issue,  assume  or  guarantee any  secured  Debt  which  would
otherwise be subject to the foregoing restrictions in an aggregate amount which,
together  with all other such  secured Debt of Amoco  Company and its Restricted
Subsidiaries and the amount of capitalized lease obligations (as included in the
latest annual audited consolidated balance  sheet of Amoco) related to  property
subject  to  Sale and  Lease-Back  Transactions which  would  be subject  to the
restrictions on Sale and  Lease-Back Transactions described  below but for  this
paragraph, does not at the time exceed 10% of Consolidated Adjusted Net Assets.

    For  the purpose of  the foregoing and the  Sale and Lease-Back Transactions
described below, the following types of transactions, among others, shall not be
deemed to create  Debt: (i)  the sale  or other transfer  of oil,  gas or  other
minerals  in place for  a period of time  until, or in an  amount such that, the
purchaser  will  realize  therefrom  a   specified  amount  of  money   (however
determined)  or a specified  amount of such  minerals or (ii)  the sale or other
transfer of any other interest in property of the character commonly referred to
as a "production payment".

    Amoco Company also will covenant in the Indenture that it will not, nor will
it permit  any  Restricted Subsidiary  to,  merge or  consolidate  with  another
corporation  if any Producing Property or  Refining or Manufacturing Property or
shares of stock or indebtedness  of any Restricted Subsidiary owned  immediately
prior  thereto  which remains  Producing Property  or Refining  or Manufacturing
Property or  shares  of  stock  or indebtedness  of  any  Restricted  Subsidiary
immediately  thereafter would  thereupon become  subject to  any Mortgage, other
than a  Mortgage  referred  to  in the  foregoing  clauses  (i)  through  (xiii)
inclusive  and other than a Mortgage for,  evidencing or with respect to secured
Debt which  is permitted  pursuant  to the  provision  described in  the  second
preceding  paragraph above, unless  Amoco Company or  such Restricted Subsidiary
shall have effectively  provided that  the Securities (together  with, if  Amoco
Company  shall so  determine, any other  indebtedness of or  guaranteed by Amoco
Company or such Restricted  Subsidiary ranking equally  with the Securities  and
then  existing or thereafter created) shall be  secured by a direct lien on such
Producing Property or Refining or Manufacturing  Property or shares of stock  or
indebtedness  of any Restricted  Subsidiary, equally and  ratably with (or prior
to) such Mortgage, so long as such Mortgage shall exist. (SECTION 1005.)

    LIMITATION ON SALE AND LEASE-BACK TRANSACTIONS.  Amoco Company will covenant
in the Indenture that it will not, nor will it permit any Restricted  Subsidiary
to,  enter into  any arrangement  with any Person  providing for  the leasing by
Amoco Company or a Restricted Subsidiary  of any Producing Property or  Refining
or  Manufacturing Property (except for  temporary leases for a  term of not more
than three years), which property  has been or is to  be sold or transferred  by
the Company or such Restricted Subsidiary to such Person (a "Sale and Lease-Back
Transaction"),  unless the proceeds of such sale  are at least equal to the fair
value (as  determined  by the  Board  of Directors  of  Amoco Company)  of  such
property and

        (a)  Amoco Company  or such Restricted  Subsidiary would  be entitled to
    issue, assume or guarantee Debt,  in an amount equal  to the fair value  (as
    determined by the Board of Directors of Amoco

                                       18
<PAGE>
    Company) of the property so leased, secured by a Mortgage on the property to
    be  leased without equally and ratably securing the Securities of any series
    and without violating the covenant described above under "Certain  Covenants
    of Amoco and Amoco Company -- Limitation on Liens";

        (b) Amoco Company shall apply within 12 months after the consummation of
    such  transaction an amount equal to the net proceeds of such transaction to
    the retirement (other than any mandatory retirement) of Debt issued, assumed
    or guaranteed  by  Amoco  Company which  by  its  terms matures  at,  or  is
    extendible or renewable at the option of the obligor to, a date more than 12
    months after the date of the creation of such Debt; or

        (c)  since the date of  the Indenture and within  a period commencing 12
    months prior to the  consummation of such transaction  and ending 12  months
    after the consummation of such transaction, Amoco Company or such Restricted
    Subsidiary  has  expended  or shall  expend  for any  Producing  Property or
    Refining or Manufacturing Property an amount  equal to (A) the net  proceeds
    of  such transaction and Amoco Company elects  to designate such amount as a
    credit against such transaction or  (B) a part of  the net proceeds of  such
    transaction  and Amoco Company  elects to designate such  amount as a credit
    against such transaction and applies an amount equal to the remainder of the
    net proceeds as provided in clause (b) above. (SECTION 1006.)

    CONSOLIDATION, MERGER AND  SALE OF  ASSETS.   Amoco and  Amoco Company  will
covenant  in the Indenture that they will  not merge or consolidate with another
corporation or sell or convey all or substantially all of their property to  any
other  corporation  unless  such  other  corporation  (except  in  any  sale  or
conveyance to the Company or one of the Restricted Subsidiaries or, in the  case
of  Amoco, to Amoco Company and, in the case of Amoco Company, to Amoco) assumes
the obligations  of Amoco  or  Amoco Company,  as the  case  may be,  under  the
Guarantees. Amoco Company will, however, be subject to the restrictions referred
to  under "Certain Covenants of Amoco and  Amoco Company -- Limitation on Liens"
in connection with any such consolidation,  merger or sale of assets.  (SECTIONS
803 AND 1005.)

    REPORTING.    Amoco and  Amoco  Company will  also  covenant that  they will
furnish certain  information  and  certificates  to the  Trustee  on  the  dates
specified in the Indenture.

CERTAIN DEFINITIONS

    For  purposes of the covenants described above under "Covenants of Amoco and
Amoco Company -- Limitation on Liens" and "-- Limitation on Sale and  Lease-Back
Transactions", the following terms have the following definitions:

    "Consolidated  Adjusted Net Assets" means total  assets of Amoco Company and
its consolidated subsidiaries, if any, less (i) their total prepaid and deferred
charges and (ii) their total current liabilities (excluding any portion  thereof
which  may by  its terms  be extended or  renewed at  the option  of the obligor
thereon to a  time more than  12 months after  the time as  of which the  amount
thereof  is  being  computed), all  as  included  in the  latest  annual audited
consolidated balance sheet of Amoco.

    "Debt" means any indebtedness for money borrowed.

    "Mortgage" means any mortgage, pledge, security interest or lien.

    "Producing Property" means  any property  interest of Amoco  Company or  any
Restricted  Subsidiary  in  land located  within  the United  States  of America
considered by Amoco Company or the Restricted Subsidiary, as the case may be, to
be productive  of crude  oil, natural  gas or  other petroleum  hydrocarbons  in
paying quantities.

    "Refining  or Manufacturing  Property" means  any refining  or manufacturing
property of Amoco Company or any  Restricted Subsidiary which is located  within
the  United States of America,  other than any such  property or portion thereof
which (a) in the opinion  of the Board of Directors  of Amoco Company is not  of
material  importance  to  the business  of  Amoco Company  and  its consolidated
subsidiaries as a whole, (b) is classified by the corporation which owns it as a
transportation  or   marketing   facility   or  (c)   is   owned   directly   or

                                       19
<PAGE>
indirectly  by Amoco  Company or  one or  more of  its Subsidiaries  or by Amoco
Company and one or more of its Subsidiaries jointly or in common with others and
the aggregate interest therein  of Amoco Company and  its Subsidiaries does  not
equal at least fifty percent (50%).

    "Restricted Subsidiary" means:

        (1)  each of the following corporations so  long as the major portion of
    its assets is located within the territorial limits of the United States  of
    America  and  its territorial  possessions:  Amoco Oil  Company  (a Maryland
    corporation), Amoco Production  Company (a Delaware  corporation) and  Amoco
    Chemical Company (a Delaware corporation); and

        (2)  any other corporation (A) substantially all the assets of which are
    located within the territorial  limits of the United  States of America  and
    its  territorial possessions, (B) which has  total assets in excess of three
    percent (3%)  of the  total consolidated  assets of  Amoco Company  and  its
    consolidated   subsidiaries,  as  included  in  the  latest  annual  audited
    consolidated balance  sheet of  Amoco,  and (C)  of  which at  least  eighty
    percent  (80%) of the outstanding stock having by the terms thereof ordinary
    voting power  to  elect  a  majority  of the  board  of  directors  of  such
    corporation  (irrespective of whether or not at  the time stock of any other
    class or classes of such corporation  shall have or might have voting  power
    by  reason of the happening  of any contingency) is  at the time directly or
    indirectly owned or controlled by Amoco Company;

PROVIDED, HOWEVER,  that the  term "Restricted  Subsidiary" shall  not mean  any
corporation  (i) the principal  operating properties of which  consist of oil or
gas pipeline  properties,  (ii) the  principal  assets  of which  are  stock  or
indebtedness  of corporations which conduct  substantially all of their business
outside the  territorial  limits  of  the  United  States  of  America  and  its
territorial  possessions or (iii) principally  engaged in financing receivables,
making loans, extending credit or other activities of a character conducted by a
credit or acceptance company.

EVENTS OF DEFAULT

    Each of  the  following  will  constitute an  Event  of  Default  under  the
Indenture with respect to Securities of any series:

        (a)  failure to pay principal of or  any premium on any Security of that
    series when due;

        (b) failure  to  pay  any  interest or  any  Additional  Amount  on  any
    Securities of that series when due, continued for 30 days;

        (c) failure to deposit any sinking fund payment, when due, in respect of
    any Security of that series;

        (d) failure to perform any other covenant of the Company, Amoco or Amoco
    Company  in the Indenture  (other than a covenant  included in the Indenture
    solely for the benefit of a series other than that series), continued for 90
    days (or such other period, if  any, described in the applicable  Prospectus
    Supplement)  after  written notice  has been  given by  the Trustee,  or the
    Holders of at  least twenty-five percent  (25%) in principal  amount of  the
    Outstanding Securities of that series, as provided in the Indenture;

        (e)  certain events with respect to  the Company, Amoco or Amoco Company
    in bankruptcy, insolvency or reorganization; and

        (f) any other Event  of Default described  in the applicable  Prospectus
    Supplement. (SECTION 501.)

    If  an Event of Default described in clauses (a) through (c) above or clause
(d) above (in the event of a  default with respect to less than all  Outstanding
series  of Securities) or clause (f) above shall occur and be continuing, either
the Trustee or the  Holders of at least  twenty-five percent (25%) in  aggregate
principal  amount  of the  Outstanding Securities  of that  series by  notice as
provided in the Indenture may declare the principal amount of the Securities  of
that  series (or, in the case of any Security that is an Original Issue Discount
Security or the principal amount of which is not then determinable, such portion
of the principal amount of such Security,  or such other amount in lieu of  such
principal amount, as may be specified in the

                                       20
<PAGE>
terms  of  such Security)  to be  due and  payable immediately.  If an  Event of
Default described in clause (d) above (in the event of a default with respect to
all Outstanding series of  Securities) or clause (e)  above shall have  occurred
and  be continuing, either  the Trustee or  the Holders of  at least twenty-five
percent (25%) in aggregate principal amount of the Outstanding Securities of all
series by notice as provided in  the Indenture may declare the principal  amount
of  the Securities of  all series (or,  in the case  of any Security  that is an
Original Issue Discount Security  or the principal amount  of which is not  then
determinable,  such portion  of the principal  amount of such  Security, or such
other amount in lieu of such principal amount, as may be specified in the  terms
of   such  Security)  to  be  due   and  payable  immediately.  After  any  such
acceleration, but before a judgment or decree based on acceleration, the Holders
of a majority  in aggregate principal  amount of the  Outstanding Securities  of
that  series (or of all  Outstanding Securities, as the  case may be) may, under
certain circumstances,  rescind and  annul such  acceleration if  all Events  of
Default, other than the non-payment of accelerated principal (or other specified
amount),  have been cured or waived as provided in the Indenture. (SECTION 502.)
For information as to waiver of defaults, see "Modification and Waiver".

    The foregoing provisions shall  be without prejudice to  the rights of  each
individual  Holder to initiate an action against  the Company for the payment of
any principal,  premium, interest  and any  Additional Amount  past due  on  any
Security, as established by Article 29 of the Negotiable Obligations Law.

    Subject  to the provisions  of the Indenture  relating to the  duties of the
Trustee, in case an Event of Default shall occur and be continuing, the  Trustee
will  be under no obligation  to exercise any of its  rights or powers under the
Indenture at the request or direction of any of the Holders, unless such Holders
shall have offered to the  Trustee reasonable indemnity. (SECTION 603.)  Subject
to  such provisions  for the  indemnification of the  Trustee, the  Holders of a
majority in  aggregate principal  amount of  the Outstanding  Securities of  any
series affected by any Event of Default (or of all Outstanding Securities of all
series,  as the case may be) will have  the right to direct the time, method and
place of conducting any  proceeding for any remedy  available to the Trustee  or
exercising  any trust  or power  conferred on  the Trustee  with respect  to the
Securities of that series (or of all  Securities, as the case may be).  (SECTION
512.)

    No  Holder of a Security of any  series will, except as provided above, have
any right to institute any proceeding with respect to the Indenture, or for  the
appointment  of a  receiver or  a trustee, or  for any  other remedy thereunder,
unless (i) such Holder has previously given  to the Trustee written notice of  a
continuing  Event of Default with respect to the Securities of that series, (ii)
the Holders of at least twenty-five percent (25%) in aggregate principal  amount
of the Outstanding Securities of that series (or all series, as the case may be)
have  made written request,  and such Holder or  Holders have offered reasonable
indemnity, to the Trustee to institute such proceeding as trustee and (iii)  the
Trustee  has failed to institute such proceeding,  and has not received from the
Holders  of  a  majority  in  aggregate  principal  amount  of  the  Outstanding
Securities  of  that series  (or all  series, as  the case  may be)  a direction
inconsistent with such request,  within 60 days after  such notice, request  and
offer.  (SECTION  507.)  However,  such  limitations  do  not  apply  to  a suit
instituted by a  Holder of  a Security  for the  enforcement of  payment of  the
principal  of  or any  premium  or interest  on such  Security  on or  after the
applicable due date specified in such Security. (SECTION 508.)

    The Company, Amoco  and Amoco  Company will be  required to  furnish to  the
Trustee  annually  a statement  by certain  of their  respective officers  as to
whether or not the Company, Amoco or Amoco Company, as the case may be, to their
knowledge, is in default in the performance  or observance of any of the  terms,
provisions and conditions of the Indenture and, if so, specifying all such known
defaults. (SECTION 1004.)

REDEMPTION FOR TAX REASONS

    If at any time after the date of the Indenture as a result of any change in,
or  amendment to,  laws or  regulations, or  as a  result of  any change  in the
application or official interpretation of  laws or regulations, of Argentina  or
any  political subdivision thereof  or taxing authority therein  or of any other
country or any political subdivision thereof  or taxing authority therein as  to
which  the payment of Additional Amounts is  provided for in the Securities of a
series and in accordance with the  Indenture, which change or amendment  becomes
effective  after the date of the Indenture, the Company becomes obligated to pay
any Additional

                                       21
<PAGE>
Amounts as provided or referred to above under "Certain Covenants of the Company
- -- Payment of Additional Amounts" and  such obligation cannot be avoided by  the
Company  taking reasonable measures available to it, then the Securities will be
redeemable as a whole (but  not in part), at the  option of the Company, at  any
time upon not less than 30 nor more than 60 days' notice given to the Holders as
provided  in the Indenture at  their principal amount (or,  if any Securities of
that series  are  Original  Issue  Discount  Securities,  such  portion  of  the
principal  amount of such Securities  as may be specified  by the terms thereof)
together with accrued  interest thereon to  the date fixed  for redemption  (the
"Redemption  Date"). The Company will also pay  to the Holders on the Redemption
Date any  Additional  Amounts which  are  then payable.  In  order to  effect  a
redemption  of the Securities  under this paragraph, the  Company is required to
deliver to the  Trustee at  least 45  days prior to  the Redemption  Date (i)  a
certificate  signed by two Directors of  the Company stating that the obligation
to pay  such  Additional  Amounts  cannot  be  avoided  by  the  Company  taking
reasonable  measures available  to it and  (ii) an opinion  of independent legal
counsel of recognized standing to the effect that the Company has or will become
obligated to  pay  such  Additional  Amounts  as a  result  of  such  change  or
amendment.  No notice of redemption  may be given earlier  than 60 days prior to
the earliest date on which the Company would be obligated to pay such Additional
Amounts were a payment in respect of the Securities then due.

    The applicable  Prospectus  Supplement  will  set forth  the  terms  of  any
additional  redemption  of the  Securities of  a  series, at  the option  of the
Company, for tax reasons  in circumstances in which  the Company, to the  extent
provided  in respect  of the  Securities of  such series  (and indicated  in the
applicable Prospectus Supplement),  becomes obligated  to pay  or indemnify  the
Holders from or against any Argentine individual asset tax imposed on or paid by
the Holders. (SECTION 1108.)

MODIFICATION AND WAIVER

    The  Indenture  will  provide  that  modifications  and  amendments  of  the
Indenture may be made by the Company, the Argentine Branch, Amoco, Amoco Company
and the Trustee  with the  consent of the  Holders of  sixty-six and  two-thirds
percent (66 2/3%) in aggregate principal amount of the Outstanding Securities of
each  series affected by such modification or amendment obtained at a meeting of
Holders held in accordance with the  Indenture; PROVIDED, HOWEVER, that no  such
modification  or  amendment  may, without  the  consent  of the  Holder  of each
Outstanding Security affected  thereby, (a)  change the Stated  Maturity of  the
principal  of, or any installment of principal  of or interest on, any Security,
(b) reduce the principal amount of, or any premium or interest on, any Security,
(c) change  the  obligation  of the  Company,  Amoco  or Amoco  Company  to  pay
Additional  Amounts, (d)  reduce the  amount of  principal of  an Original Issue
Discount Security  or  any  other  Security payable  upon  acceleration  of  the
Maturity  thereof, (e) change the place or  currency of payment of principal of,
or any premium or  interest or Additional Amounts  on, any Security, (f)  impair
the  right  to institute  suit for  the enforcement  of any  payment on  or with
respect to  any Security,  (g)  reduce the  percentage  in principal  amount  of
Outstanding  Securities of any series, the  consent of whose Holders is required
for modification or  amendment of the  Indenture, (h) reduce  the percentage  in
principal amount of Outstanding Securities of any series necessary for waiver of
compliance  with certain  provisions of the  Indenture or for  waiver of certain
defaults, (i) reduce  the requirements  with respect  to quorum  or voting,  (j)
modify such provisions with respect to modification and waiver, or (k) change in
any manner adverse to the interests of the Holders of any Outstanding Securities
the terms and conditions of the Guarantees. (SECTION 902.)

    The  Holders  of sixty-six  and two-thirds  percent  (66 2/3%)  in principal
amount of the Outstanding Securities of any  series by act of such Holders at  a
meeting  of Holders held in accordance with the terms of the Indenture may waive
compliance by  the Company,  Amoco and  Amoco Company  with certain  restrictive
provisions  of  the Indenture.  (SECTION  1008.) The  Holders  of a  majority in
principal amount of the Outstanding Securities of any series (or all series,  as
the  case  may be)  may waive  any past  default under  the Indenture,  except a
default in the payment of principal, premium or interest (except that a  default
in  payment resulting  from a declaration  of acceleration  which declaration of
acceleration has been rescinded  and annulled pursuant to  the Indenture may  be
waived)  and certain covenants  and provisions of the  Indenture which cannot be
amended without the consent of the  Holder of each Outstanding Security of  such
series (or all series, as the case may be) affected. (SECTION 513.)

                                       22
<PAGE>
    The  Indenture will provide  that in determining whether  the Holders of the
requisite principal amount of the Outstanding Securities have given or taken any
direction, notice, consent, waiver or other action under the Indenture as of any
date, or whether a quorum is present at a meeting of Holders of Securities,  (i)
the  principal amount of an Original Issue Discount Security that will be deemed
to be Outstanding will be the amount of the principal thereof that would be  due
and  payable as of such  date upon acceleration of  the Maturity thereof to such
date, (ii) if,  as of  such date,  the principal  amount payable  at the  Stated
Maturity  of a Security is not determinable (for example, because it is based on
an index), the principal amount of such Security deemed to be Outstanding as  of
such  date  will be  an  amount determined  in  the manner  prescribed  for such
Security and (iii) the principal amount of a Security denominated in one or more
foreign currencies or currency units that will be deemed to be Outstanding  will
be  the  U.S.  dollar equivalent,  determined  as  of such  date  in  the manner
prescribed for such Security, of the  principal amount of such Security (or,  in
the  case of  a Security described  in clause (i)  or (ii) above,  of the amount
described in such clause). Certain Securities, including those for whose payment
or redemption money has been deposited or set aside in trust for the Holders and
those that have been fully defeased pursuant to Section 1302, will not be deemed
to be Outstanding. (SECTION 101.)

    Except in certain limited circumstances, the Company will be entitled to set
any day  as  a  record date  for  the  purpose of  determining  the  Holders  of
Outstanding  Securities of  any series entitled  to give or  take any direction,
notice, consent, waiver or other action  under the Indenture, in the manner  and
subject  to  the  limitations  provided in  the  Indenture.  In  certain limited
circumstances, the Trustee also will be entitled to set a record date for action
by Holders. If a record date is set for  any action to be taken by Holders of  a
particular  series, such action may be taken  only by persons who are Holders of
Outstanding Securities of that series on the record date. To be effective,  such
action  must  be taken  by Holders  of  the requisite  principal amount  of such
Securities within  a  specified  period  following  the  record  date.  For  any
particular  record date, this period will be  180 days or such shorter period as
may be specified by the Company (or the Trustee, if it set the record date), and
may be shortened  or lengthened (but  not beyond  180 days) from  time to  time.
(SECTION 104.)

DEFEASANCE AND COVENANT DEFEASANCE

    The  Indenture will  provide that,  if and  to the  extent indicated  in the
applicable Prospectus Supplement, the  Company may elect, at  its option at  any
time,  to  have  the provisions  of  Section  1302, relating  to  defeasance and
discharge of indebtedness, or  Section 1303, relating  to defeasance of  certain
restrictive covenants in the Indenture, applied to the Securities of any series,
or to any specified part of a series. (SECTION 1301.)

    DEFEASANCE  AND  DISCHARGE.    The Indenture  will  provide  that,  upon the
Company's exercise of its option  (if any) to have  Section 1302 applied to  any
Securities,  the Company,  Amoco and Amoco  Company will be  discharged from all
their respective obligations with respect to such Securities (except for certain
obligations to  exchange or  register  the transfer  of Securities,  to  replace
stolen,  lost or mutilated  Securities, to maintain paying  agencies and to hold
moneys for payment in trust)  upon the deposit in trust  for the benefit of  the
Holders  of such Securities of money  or Government Obligations, or both, which,
through the payment of principal and  interest in respect thereof in  accordance
with  their  terms,  will provide  money  in  an amount  sufficient  to  pay the
principal of and any premium and  interest on such Securities on the  respective
Stated  Maturities  in  accordance with  the  terms  of the  Indenture  and such
Securities. Such defeasance or discharge may occur only if, among other  things,
the Company, Amoco and Amoco Company have delivered to the Trustee an Opinion of
Counsel to the effect that the Company, Amoco, or Amoco Company, as the case may
be,  has  received from,  or  there has  been  published by,  the  United States
Internal Revenue Service  a ruling,  regulation or  pronouncement of  comparable
authority,  or there has been a change in  tax law, in either case to the effect
that Holders of  such Securities  will not recognize  gain or  loss for  Federal
income  tax purposes as a  result of such deposit,  defeasance and discharge and
will be subject to Federal income tax on the same amount, in the same manner and
at the same times as  would have been the case  if such deposit, defeasance  and
discharge were not to occur. (SECTIONS 1302 AND 1304.)

    DEFEASANCE  OF CERTAIN COVENANTS.  The Indenture will provide that, upon the
Company's exercise of its option  (if any) to have  Section 1303 applied to  any
Securities, the Company, Amoco and Amoco Company

                                       23
<PAGE>
may omit to comply with certain restrictive covenants, including those described
under "Certain Covenants of Amoco and Amoco Company -- Limitation on Liens", "--
Limitation  on Sale and  Lease-Back Transactions" and  "-- Consolidation, Merger
and Sale of Assets", and any that may be described in the applicable  Prospectus
Supplement, and the occurrence of certain Events of Default, which are described
above  in clause (d) (with respect  to such restrictive covenants) under "Events
of Default"  and  any  that  may  be  described  in  the  applicable  Prospectus
Supplement,  will be deemed not to be or  result in an Event of Default, in each
case with respect to such Securities. In order for the Company to exercise  such
option,  the Company, Amoco  and Amoco Company  will be required  to deposit, in
trust for the  benefit of the  Holders of such  Securities, money or  Government
Obligations,  or both, which,  through the payment of  principal and interest in
respect thereof in accordance with their terms, will provide money in an  amount
sufficient  to  pay  the principal  of  and  any premium  and  interest  on such
Securities on the respective Stated Maturities  in accordance with the terms  of
the  Indenture and  such Securities. The  Company, Amoco and  Amoco Company will
also be required, among other  things, to deliver to  the Trustee an Opinion  of
Counsel to the effect that Holders of such Securities will not recognize gain or
loss  for Federal income tax purposes as a result of such deposit and defeasance
of certain obligations and  will be subject  to Federal income  tax on the  same
amount,  in the same manner and at the same times as would have been the case if
such deposit  and  defeasance  were not  to  occur.  In the  event  the  Company
exercised  this option with  respect to any Securities  and such Securities were
declared due and payable because of the occurrence of any Event of Default,  the
amount  of  money and  Government  Obligations so  deposited  in trust  would be
sufficient to pay amounts due on such Securities at the time of their respective
Stated Maturities  but  may  not  be  sufficient to  pay  amounts  due  on  such
Securities  upon any acceleration resulting from  such Event of Default. In such
case, the  Company,  Amoco  and  Amoco Company  would  remain  liable  for  such
payments. (SECTIONS 1303 AND 1304.)

TEMPORARY BEARER GLOBAL SECURITIES

  GENERAL

    Unless  otherwise  specified  in  the  Bearer  Security  and  the applicable
Prospectus Supplement,  the  Securities  constituting  a  separate  identifiable
tranche  (within  the meaning  of Regulation  S under  the Securities  Act) will
initially be represented by a Temporary Bearer Global Security, to be  deposited
with  a common depositary  in London for  Euroclear and Cedel  for credit to the
designated accounts.

    The Temporary Bearer Global  Security will be  exchangeable for a  Permanent
Bearer  Global Security on the Exchange  Date as described under "Form, Exchange
and Transfer" above.

  INTEREST PAYMENT DATE PRIOR TO EXCHANGE DATE

    In the  case of  a Temporary  Bearer Global  Security that  has an  Interest
Payment  Date prior to the Exchange Date, a member organization appearing in the
records of Euroclear or Cedel as entitled  to a portion of the principal  amount
of  such Temporary Bearer Global Security (a "Member Organization") must provide
an Owner  Tax  Certification  (as  defined below)  to  Euroclear  or  Cedel  and
Euroclear  or Cedel must provide to the  Company or its agent a certification in
the form required by the Indenture  (a "Depositary Tax Certification"), in  each
case,  prior to  the payment  of interest. Until  an Owner  Tax Certification is
provided by the Member Organization to Euroclear or Cedel and Euroclear or Cedel
provides to the Company or its agent a Depositary Tax Certification, such Member
Organization will not be  entitled to receive any  interest with respect to  its
interest  in the  Temporary Bearer Global  Security or to  exchange its interest
therein for a portion of the Permanent Bearer Global Security.

  EXCHANGE DATE PRIOR TO INTEREST PAYMENT DATE

    In the case  of a Temporary  Bearer Global  Security that does  not have  an
Interest  Payment Date prior to the  Exchange Date, the Member Organization must
provide to Euroclear or Cedel an Owner Tax Certification and Euroclear or  Cedel
must  provide to the Company or its  agent a Depositary Tax Certification. Until
the  requisite  certifications  are  provided  by  the  Member  Organization  to
Euroclear  or Cedel and Euroclear or Cedel provides the requisite certifications
to the Company or its Agent, such  Member Organization shall not be entitled  to
receive any interest with respect to its interest in the Temporary Bearer Global
Security or to exchange its interest in the Temporary Bearer Global Security for
a portion of the Permanent Bearer Global Security.

                                       24
<PAGE>
  CERTIFICATIONS

    As  described above, no interest will be paid on any Temporary Bearer Global
Security and no exchange of a Temporary Bearer Global Security for a portion  of
the  Permanent Bearer  Global Security  may occur  until the  person entitled to
receive such  interest or  a portion  of the  Permanent Bearer  Global  Security
furnishes  written certification  (the "Owner  Tax Certification"),  in the form
required by the Indenture, to  the effect that such person  (i) is not a  United
States  person  (as  defined  below  under  "Limitation  on  Issuance  of Bearer
Securities"), (ii) is a foreign branch of a United States financial  institution
purchasing  for its own account or for resale,  or is a United States person who
acquired the Security  through such a  financial institution and  who holds  the
Security  through  such  financial  institution on  the  date  of certification,
provided in either case that  such financial institution provides a  certificate
to  the Company or  the distributor selling  the Security to  it stating that it
agrees to comply with  the requirements of Section  165(j)(3)(A), (B) or (C)  of
the  U.S.  Internal Revenue  Code of  1986,  as amended,  and the  United States
Treasury Regulations thereunder, or (iii) is a financial institution holding for
purposes of resale  during the restricted  period (as defined  in United  States
Treasury  Regulations Section  1.163-5(c)(2)(i)(D)(7)). A  financial institution
described in  clause  (iii) of  the  preceding  sentence (whether  or  not  also
described  in clause  (i) or  (ii)) must  certify that  it has  not acquired the
Security for purposes  of resale  directly to  a United  States person  or to  a
person within the United States or its possessions.

NOTICES -- TO HOLDERS OF REGISTERED SECURITIES

    Notices  to Holders of Registered Securities will, subject to the provisions
of the Indenture, be deemed to be validly given if (i) sent by first class  mail
to  them at their respective addresses as recorded in the Security Register, and
will be deemed to have  been validly given on the  fifth Business Day after  the
date  of such  mailing and  (ii) published in  a leading  daily newspaper having
general circulation in  Argentina and, when  required by Argentine  law, in  the
OFFICIAL  GAZETTE OF  ARGENTINA. Notices by  publication will be  deemed to have
been given on the date of latest publication. (SECTION 106.)

NOTICES -- TO HOLDERS OF BEARER SECURITIES

    Notices to Holders of Bearer Securities  will, subject to the provisions  of
the Indenture, be deemed to be validly given if (i) published in a leading daily
English  language  newspaper  having  general circulation  in  London  (which is
expected to be the FINANCIAL TIMES) or, if such publication is not  practicable,
if  published in a leading English language newspaper having general circulation
in Europe or, in  the case of  a Temporary Bearer  Global Security or  Permanent
Bearer Global Security, if delivered to Euroclear and Cedel for communication by
them to the person shown in their respective records as having interests therein
and  (ii) published in  a leading daily newspaper  having general circulation in
Argentina and,  when required  by  Argentine law,  in  the OFFICIAL  GAZETTE  OF
ARGENTINA.  Notices by publication will be deemed to have been given on the date
of latest publication. (SECTION 106.)

TITLE

    Title to any Temporary Bearer  Global Security, any Permanent Bearer  Global
Security,  any Bearer Security and any coupons appertaining to any such Security
will pass by delivery. The Company, the Trustee and any agent of the Company  or
the  Trustee may deem and treat the Holder of any Bearer Security and the Holder
of any  coupon  and the  registered  owner of  any  Registered Security  as  the
absolute  owner thereof (whether or not such Security or coupon shall be overdue
and notwithstanding  any notice  to  the contrary)  for  the purpose  of  making
payment and for all other purposes. (SECTION 308.)

                                       25
<PAGE>
MEETINGS OF HOLDERS OF SECURITIES

    A  meeting of Holders of Securities of any  series may be called at any time
to make, give  or take  any request, demand,  authorization, direction,  notice,
consent,  waiver or other action provided by  the Indenture to be made, given or
taken by Holders of Securities of such series, including but not limited to  any
of the following purposes:

        (1)  to give any notice to the Company, to Amoco, to Amoco Company or to
    the Trustee, or to give any directions to the Trustee, or to consent to  the
    waiving  of any default hereunder and its consequences, or to take any other
    action or  authorization to  be taken  by  Holders pursuant  to any  of  the
    provisions described under "Events of Default";

        (2) to remove the Trustee and nominate a successor trustee;

        (3) to consent to the execution of a supplemental indenture; or

        (4)  to take any other action authorized to  be taken by or on behalf of
    the Holders  of any  specified principal  amount of  the Securities  of  any
    series  under any other provisions of the Indenture or under applicable law.
    (SECTION 1501.)

    The Trustee may at any time call  a meeting of Holders of Securities of  any
series  for any purpose specified above, to be held in the City of Buenos Aires,
Argentina; PROVIDED,  HOWEVER,  that  the  Trustee may  determine  to  hold  any
meetings  simultaneously in the City of Buenos  Aires, Argentina and in The City
of New  York or  in London,  England  by means  of any  telecommunication  which
permits  the participants to hear and speak  to each other. In any case meetings
shall be held at such time and such place in any such city as the Trustee  shall
determine.  Notice  of every  meeting of  Holders of  Securities of  any series,
setting forth the date, time and the place of such meeting, in general terms the
action proposed to  be taken  at such meeting  and the  requirements to  attend,
shall  be given in the OFFICIAL GAZETTE OF ARGENTINA and in the manner set forth
under "Notices  -- To  Holders  of Registered  Securities"  and "Notices  --  To
Holders  of Bearer Securities", not less than 10  nor more than 30 days prior to
the date fixed for the  meeting, and any publication  thereof shall be for  five
consecutive business days. (SECTION 1502.)

    The Company, the Argentine Branch, Amoco, Amoco Company or the Holders of at
least five percent (5%) in principal amount of the Outstanding Securities of any
series  may direct the Trustee to call a meeting of the Holders of Securities of
such series for any purpose specified above, by written request setting forth in
reasonable detail  the action  proposed to  be taken  at the  meeting.  (SECTION
1502.)

    The  Persons entitled to vote sixty percent (60%) in principal amount of the
Outstanding Securities of a  series shall constitute a  quorum for a meeting  of
Holders  of  Securities of  such  Series. The  Persons  entitled to  vote thirty
percent (30%) in  principal amount  of the  Outstanding Securities  of a  series
shall  constitute a quorum  for a reconvened  meeting of Holders  of such series
adjourned for lack of the requisite quorum. (SECTION 1504.)

    Any Holder of  Securities that wishes  to attend any  meeting of Holders  of
Securities must notify either the Registrar or the Co-Registrar of the intention
of  such Holder  to attend  such meeting in  person or  by proxy  at least three
calendar days prior to the date of such meeting.

    At any meeting of Holders of Securities,  each Holder of a Security of  such
series will be entitled to one vote for each U.S. $1.00 principal amount (or its
equivalent)  of the Outstanding Securities of such series held or represented by
such Holder. (SECTION 1505.)

    Any resolution passed or decision taken at any duly held meeting of  Holders
of Securities of any series shall be binding on all the Holders of Securities of
such  series and any related  coupons, whether or not  present or represented at
the meeting. (SECTION 1504.)

GOVERNING LAW AND ENFORCEABILITY

    The Negotiable Obligations Law establishes the legal requirements  necessary
for  the Securities  to qualify as  "negotiable obligations".  The execution and
delivery by the Argentine Branch of the Securities

                                       26
<PAGE>
and any coupons shall be governed by the laws of Argentina. All other matters in
respect of the Securities, any coupons,  the Guarantees and the Indenture  shall
be  governed by, and construed in accordance with,  the laws of the State of New
York. (SECTION 112.)

    The Company, Amoco  and Amoco  Company have consented  to the  non-exclusive
jurisdiction  of any court  of the State of  New York or  any U.S. Federal Court
sitting in the Borough of  Manhattan, The City of  New York, United States,  and
any  appellate court  from any  thereof, and  have waived  any objection  on the
grounds of venue, residence, domicile or inconvenient forum to the  jurisdiction
of  such  courts over  any suit,  action or  proceeding that  may be  brought in
connection with  the Indenture,  the  Securities or  the Guarantees.  Any  suit,
action or proceeding brought in connection with the Indenture, the Securities or
the  Guarantees may also be brought in any competent court in the City of Buenos
Aires, Argentina, unless such  suit, action or proceeding  cannot be brought  or
maintained  for any reason in the City of Buenos Aires, Argentina, in which case
such suit, action  or proceeding  may be instituted  in any  competent court  in
Argentina. (SECTION 113.)

CURRENCY INDEMNITY

    Any  amount  received or  recovered in  respect  of any  sum payable  by the
Company, Amoco or Amoco Company, as the case may be, under or in connection with
any Security, including damages, in a currency other than the currency in  which
such  Security is denominated (the "denomination currency") (whether as a result
of, or  of  the  enforcement  of,  a  judgment  or  order  of  a  court  of  any
jurisdiction,  in the winding up or dissolution  of the Company or otherwise) by
any Holder in respect  of any sum expressed  to be due to  it from the  Company,
Amoco or Amoco Company, as the case may be, shall only constitute a discharge of
the  Company, Amoco or Amoco Company,  as the case may be,  to the extent of the
amount in the denomination currency which the recipient is able to purchase with
the amount so received or recovered in  that other currency on the date of  that
receipt  or recovery (or, if it is not practicable to make that purchase on that
date, on the  first date on  which it is  practicable to do  so). If the  amount
received  or recovered  in that other  currency is  less than the  amount in the
denomination currency expressed to be due  to the recipient under such  Security
or  the related Guarantees, the Company, Amoco and Amoco Company shall indemnify
such recipient against  any loss  (as measured  by the  difference between  such
amount  in  the  denomination currency  and  the amount  received  or recovered)
sustained by it as a result. In any event, the Company, Amoco and Amoco  Company
shall  indemnify the recipient against the cost of making any such purchase. For
the purposes of this paragraph, it will be sufficient for the Holder to  certify
in  a satisfactory manner  (indicating the sources of  information used) that it
would have suffered a loss had  an actual purchase of the denomination  currency
been  made with  the amount so  received in that  other currency on  the date of
receipt or recovery (or, if a purchase of the denomination currency on such date
had not  been  practicable, on  the  first date  on  which it  would  have  been
practicable,  it being required that the need  for a change of date be certified
in the manner  mentioned above). The  foregoing indemnities constitute  separate
and  independent obligations  of each of  the Company, Amoco  and Amoco Company,
shall give  rise to  a separate  and independent  cause of  action, shall  apply
irrespective  of any  waiver granted  by any Holder  and shall  continue in full
force and effect despite any such judgment or order as aforesaid. (SECTION 515.)

REGARDING THE TRUSTEE

    The Chase Manhattan Bank (National Association) is depository for funds  of,
makes  loans to, acts as trustee for certain employee benefit plans and performs
other services for the Company, Amoco and Amoco Company in the normal course  of
business.  H. Laurance  Fuller, the Chairman  of the Board,  President and Chief
Executive Officer of Amoco, is a Director of The Chase Manhattan Corporation and
The Chase Manhattan Bank (National Association).

    The Chase Manhattan Bank (National  Association) serves as trustee under  an
indenture  relating to debt  securities of Amoco  Canada Petroleum Company Ltd.,
guaranteed as to payment of principal, premium, if any, and interest, if any, by
Amoco and Amoco Company.

                                       27
<PAGE>
                  LIMITATIONS ON ISSUANCE OF BEARER SECURITIES

    In compliance with United  States federal tax  laws and regulations,  Bearer
Securities  (including Temporary  Bearer Global Securities  and Permanent Bearer
Global Securities) may not be offered  or sold during the restricted period  (as
defined  in United  States Treasury  Regulations Section 1.163-5(c)(2)(i)(D)(7))
within the United States or its possessions or to United States persons (each as
defined below) other than to an office located outside the United States and its
possessions of  a United  States financial  institution (as  defined in  Section
1.165-12(c)(1)(v) of the United States Treasury Regulations), purchasing for its
own account or for resale or for the account of certain customers, that provides
a  certificate stating that it agrees to comply with the requirements of Section
165(j)(3)(A), (B) or (C) of the United States Internal Revenue Code of 1986,  as
amended,  and the United  States Treasury Regulations  thereunder, or to certain
other persons  described  in  Section  1.163-(5)(c)(2)(i)(D)(1)(iii)(B)  of  the
United  States Treasury Regulations. Moreover, such Bearer Securities may not be
delivered in connection with their sale during the restricted period within  the
United  States  or  its  possessions. Any  distributor  (as  defined  in Section
1.163-5(c)(2)(i)(D)(4) of the United States Treasury Regulations)  participating
in  the offering  or sale of  Bearer Securities  must covenant that  it will not
offer or sell  during the  restricted period  any Bearer  Securities within  the
United  States or its  possessions or to  United States persons  (other than the
persons described above),  it will not  deliver in connection  with the sale  of
Bearer  Securities during the restricted period any Bearer Securities within the
United States or  its possessions  and it  has in  effect procedures  reasonably
designed  to ensure that  its employees and  agents who are  directly engaged in
selling the Bearer Securities are aware of the restrictions on offers and  sales
described  above. No  Bearer Securities  (other than  a Temporary  Bearer Global
Security) may be delivered,  nor may interest be  paid on any Bearer  Securities
until  receipt by the Company of (i)  a Depositary Tax Certification in the case
of Temporary Bearer Global Securities or (ii) an Owner Tax Certification in  all
other  cases as  described above under  "Description of  Securities -- Temporary
Bearer Global  Securities  -- Certifications".  Bearer  Securities will  bear  a
legend  to  the  following effect:  "Any  United  States person  who  holds this
obligation will be  subject to limitations  under the United  States income  tax
laws,  including the limitations provided in  Sections 165(j) and 1287(a) of the
Internal Revenue Code."

    As used  in  this section,  "United  States  person" means  any  citizen  or
resident  of the  United States,  any corporation,  partnership or  other entity
created or organized in or under the laws of the United States and any estate or
trust the income of  which is subject to  United States federal income  taxation
regardless  of its  source, "United States"  means the United  States of America
including the States thereof and the District of Columbia) and "possessions"  of
the  United States include  Puerto Rico, the U.S.  Virgin Islands, Guam, America
Samoa, Wake Islands and Northern Mariana Islands.

                                    TAXATION

    The following  are general  summaries of  certain Argentine  tax and  United
States  federal income tax  consequences relating to  the acquisition, ownership
and disposition of the Securities of any series.

    The  applicable  Prospectus   Supplement  may  set   forth  additional   tax
considerations relevant to the Securities of any series.

    The following summaries are based upon the provisions of laws (including, in
the  case of  Argentina, the Argentine  Income Tax Law  and, in the  case of the
United States, the United States Internal Revenue Code of 1986, as amended  (the
"Code")), and regulations, rulings and judicial decisions as of the date of this
Prospectus,  and such laws,  regulations, rulings and  judicial decisions may be
repealed, revoked or modified so as to result in Argentine or United States  tax
consequences different from those summarized below.

    PROSPECTIVE  PURCHASERS OF SECURITIES SHOULD  CONSULT THEIR OWN TAX ADVISORS
CONCERNING THE  ARGENTINE,  UNITED STATES  AND  OTHER TAX  CONSEQUENCES  OF  THE
ACQUISITION, OWNERSHIP AND DISPOSITION OF THE SECURITIES OF ANY SERIES.

                                       28
<PAGE>
ARGENTINE TAXATION

    The  following summary of  certain Argentine tax  considerations relating to
the Securities  is based  upon the  advice of  Perez Alati,  Grondona,  Benites,
Arntsen & Martinez de Hoz (h), Argentine counsel to the Company, Amoco and Amoco
Company.

    PAYMENTS  OF  INTEREST.    Except  as  set  forth  below,  interest payments
(including accretions  of original  issue discount)  on the  Securities will  be
exempt  from Argentine  income tax  provided that  the Securities  are issued in
accordance with  the  Negotiable Obligations  Law  and qualify  for  tax  exempt
treatment  under Article  36 of  such Law. Under  this Article,  interest on the
Securities  will  be  exempt  if  the  following  conditions  (the  "Article  36
Conditions") are satisfied:

        (a)  the Securities are  placed through a  public offering authorized by
    the CNV;

        (b) the proceeds of the offering are used by the Company for (i) working
    capital purposes  within  Argentina,  (ii) investments  in  physical  assets
    located   in  Argentina,   (iii)  refinancing  of   indebtedness  and  other
    liabilities, and/or (iv)  contributions to  the capital of  a controlled  or
    affiliated  corporation,  provided  the  latter uses  the  proceeds  of such
    contribution for the purposes specified  in clauses (i), (ii) and/or  (iii);
    and

        (c)  the Company provides evidence  to the CNV that  the proceeds of the
    offering have been used for the purposes described in (b) above.

    The Securities  will be  issued in  compliance with  all of  the Article  36
Conditions  and the CNV has authorized the  public offering of the Securities by
Resolution No. 10,982.

    If the Company does not comply with the Article 36 Conditions, Article 38 of
the Negotiable Obligations Law provides that the Company will be responsible for
the payment of any taxes on interest received by the Holders. In such event, the
Holders shall receive the full amount of interest provided for in the Securities
without any deduction or withholding of Argentine income taxes.

    Decree No. 1076/92, as  amended by Decree No.  1157/92, ratified by Law  No.
24,307  (the "Decree"), eliminated the exemption  described above in the case of
Holders which  are subject  to Title  VI of  the Argentine  Income Tax  Law  (in
general,  entities  organized  or incorporated  under  Argentine  law, Argentine
branches of foreign entities, sole  proprietorships and individuals carrying  on
certain  commercial activities in Argentina ("Argentine Entities")). As a result
of the Decree, interest paid to Argentine Entities is subject to withholding  as
prescribed by Argentine tax regulations. Argentine Entities must, in the case of
the  Securities  of any  series,  hold Securities  in the  form  of one  or more
definitive Registered Securities  and not in  the form of  Bearer Securities  or
interests in Global Bearer Securities or Global Registered Securities.

    INCOME  TAX  ON CAPITAL  GAINS.   Resident  and nonresident  individuals and
corporations and  other entities  which  are not  organized or  incorporated  in
Argentina  and which do not have a  permanent establishment in Argentina are not
subject to taxation on capital gains derived from the sale or other  disposition
of  the Securities if the Article 36 Conditions have been satisfied. As a result
of the Decree, Argentine  Entities are subject  to tax on  capital gains on  the
sale  or  other disposition  of the  Securities as  prescribed by  Argentine tax
regulations.

    OTHER TAXES.    All  transactions  related to  the  issuance,  offer,  sale,
transfer,  payment of principal and/or interest  or redemption of the Securities
are exempt  from Argentine  value added  tax if  the Article  36 Conditions  are
satisfied.

    Individuals (whether or not citizens of, or residents in, Argentina) will be
subject to a one-half of one percent (0.5%) individual asset tax on the value of
their holdings of Securities as of December 31 of each year.

    Corporations  and other entities organized  or incorporated in Argentina and
corporations and  other entities  which  are not  organized or  incorporated  in
Argentina  but which have a permanent  establishment in Argentina generally will
not be subject to  the individual asset  tax with respect  to their holdings  of
Securities.

    Securities  held as of  December 31 of  each year by  corporations and other
entities which are not organized or  incorporated in Argentina and which do  not
have  a  permanent  establishment  in  Argentina,  but  which  are  organized or
incorporated in a jurisdiction  that does not require  private securities to  be
issued in

                                       29
<PAGE>
registered  form, will be subject to a one-half of one percent (0.5%) individual
asset tax to be  assessed on the value  of such Securities as  of such date,  if
such Securities are held in co-ownership, possession, use, disposition, deposit,
tenancy,  custody,  management or  safekeeping  by individuals,  corporations or
entities resident in Argentina. In such cases, the individuals, corporations  or
entities  resident in Argentina will be  responsible for assessing and remitting
the tax to the Argentine tax authorities, but will be entitled to  reimbursement
from  the owners  of the  Securities. Securities  owned by  insurance companies,
pension funds, open-end  investment companies or  banking or financial  entities
organized  in countries in which the relevant central bank applies the standards
approved by  the  Committee  of Banks  of  Basle  will not  be  subject  to  the
individual asset tax.

    The  Argentine tax authorities have  not yet issued regulations implementing
certain aspects of the law providing for the individual asset tax in its current
form, and  neither the  tax authorities  nor  the courts  have had  occasion  to
interpret  such law.  It remains  unclear, for  example, whether  the concept of
ownership as  used  in the  law  refers to  record  ownership or  to  beneficial
ownership.  The reference to private securities in the law is also unclear. Such
term may be interpreted to  mean debt and equity  securities that have not  been
authorized  for listing or public offering. As  of the date hereof, there can be
no assurances concerning the interpretation of these and other provisions of the
law by the tax authorities and the courts.

    The Argentine tax authorities have not implemented any mechanisms to collect
the individual asset tax from individuals  who are not resident in Argentina  or
from  corporations and other entities which are not organized or incorporated in
Argentina and which do not have a permanent establishment in Argentina. The  tax
authorities  have not imposed any obligation on Argentine issuers of securities,
including the  Company, to  collect  such tax  by  withholding or  deduction  in
respect of payments on such securities.

    In  the event that it becomes necessary to institute enforcement proceedings
in relation to the  Company in Argentina,  a court tax (currently  at a rate  of
three  percent) will be  imposed on the  amount of any  claim brought before the
Argentine courts sitting in the City of Buenos Aires.

UNITED STATES FEDERAL INCOME TAXATION

    The following is a general summary  of certain United States federal  income
tax considerations relating to the Securities.

    As  used herein, a "United States Holder"  of a Security means a Holder that
is a "United  States person" (as  is defined under  "Limitations on Issuance  of
Bearer  Securities"). A  "Non-United States  Holder" is a  Holder that  is not a
United States Holder.

    The summary deals only  with Securities that are  held as capital assets  by
United  States Holders and does not address special situations, such as those of
dealers in  securities or  currencies,  financial institutions,  life  insurance
companies,  persons  holding Securities  as a  part of  a hedging  or conversion
transaction or a straddle or  United States Holders whose "functional  currency"
is not the U.S. dollar, in each case except as otherwise noted. In addition, the
summary  assumes that the Securities are not  sold at an original issue discount
or denominated  in a  currency or  currency unit  other than  U.S. dollars.  Any
special  United  States  federal  income  tax  considerations  relevant  to  the
Securities of  any  series  will  be set  forth  in  the  applicable  Prospectus
Supplement.

    PAYMENTS OF INTEREST.  Interest on a Security will generally be taxable to a
United  States Holder as ordinary income from domestic sources at the time it is
paid or  accrued  in  accordance  with the  United  States  Holder's  method  of
accounting for tax purposes.

    MARKET  DISCOUNT.   If a  United States Holder  purchases a  Security for an
amount that is less than its  principal amount, such difference will be  treated
as  "market discount" for United States federal income tax purposes, unless such
difference is less than a specified DE MINIMIS amount. Under the market discount
rules, a United States  Holder will be required  to treat any principal  payment
on,  or any gain  on the sale,  exchange, retirement or  other disposition of, a
Security as ordinary income to the extent  of the market discount which has  not
previously  been included  in income  and is treated  as having  accrued on such
Security at the  time of such  payment or disposition.  In addition, the  United
States  Holder may be required  to defer, until the  maturity of the Security or
its earlier disposition  in a  taxable transaction, the  deduction of  all or  a
portion  of the  interest expense on  any indebtedness incurred  or continued to
purchase or carry such Security.

                                       30
<PAGE>
    Any market discount will be considered  to accrue ratably during the  period
from  the date of acquisition  to the maturity date  of the Security, unless the
United States Holder elects  to accrue on a  constant interest method. A  United
States  Holder of  a Security  may elect  to include  market discount  in income
currently as it accrues  (on either a ratable  or constant interest method),  in
which  case the rule  described above regarding  deferral of interest deductions
will not apply. This  election to include market  discount in income  currently,
once  made, applies to all market discount  obligations acquired on or after the
first taxable year to which the election applies and may not be revoked  without
the consent of the United States Internal Revenue Service (the "IRS").

    AMORTIZABLE  BOND PREMIUM.  A United States Holder that purchases a Security
for an amount  in excess  of the  sum of all  principal amounts  payable on  the
Security  after  the purchase  date  will be  considered  to have  purchased the
Security at a "premium".

    A United States Holder generally may elect to amortize the premium over  the
remaining  term of the Security on a constant yield method. The amount amortized
in any  year will  be  treated as  a reduction  of  the United  States  Holder's
interest  income from the Security. Bond premium  on a Security held by a United
States Holder that  does not make  such an  election will decrease  the gain  or
increase  the  loss otherwise  recognized on  disposition  of the  Security. The
election to amortize premium on a constant yield method once made applies to all
debt obligations held  or subsequently  acquired by the  electing United  States
Holder on or after the first day of the first taxable year to which the election
applies and may not be revoked without the consent of the IRS.

    SALE,  EXCHANGE AND RETIREMENT OF SECURITIES.   A United States Holder's tax
basis in  a  Security will,  in  general, be  the  United States  Holder's  cost
therefor,  increased by  market discount  previously included  in income  by the
United States  Holder and  reduced  by any  amortized  premium. Upon  the  sale,
exchange or retirement of a Security, a United States Holder will recognize gain
or  loss equal  to the  difference between  the amount  realized upon  the sale,
exchange or retirement  (less any  accrued interest,  which will  be taxable  as
such)  and the adjusted tax basis of the  Security. With respect to gain or loss
attributable to market discount, such gain or loss will be capital gain or  loss
and  will be long-term capital gain or loss  if at the time of sale, exchange or
retirement the Security has been held for more than one year. Under current law,
net capital  gains of  individuals are,  under certain  circumstances, taxed  at
lower  rates than items of ordinary  income. The deductibility of capital losses
is subject to limitations.

    NON-UNITED STATES HOLDERS.  Under  current United States federal income  and
estate   tax  law,  and  subject  to  the  discussion  below  concerning  backup
withholding:

        (a) no withholding of United States federal income tax will be  required
    with  respect to the payment by the Company or any Paying Agent of principal
    or interest on a Security owned by a Non-United States Holder, provided  (i)
    that  the  beneficial  owner does  not  actually or  constructively  own ten
    percent or more of the total combined  voting power of all classes of  stock
    of  the Company entitled to vote within  the meaning of Section 871(h)(3) of
    the Code and the regulations thereunder, (ii) the beneficial owner is not  a
    controlled  foreign corporation that is related to the Company through stock
    ownership, (iii)  the  beneficial owner  is  not  a bank  whose  receipt  of
    interest  on a Security is described in Section 881(c)(3)(A) of the Code and
    (iv) in the case  of a Registered Security,  the beneficial owner  satisfies
    the  statement requirement (described generally  below) set forth in Section
    871(h) and Section 881(c) of the Code and the regulations thereunder;

        (b) no withholding of United States federal income tax will be  required
    with  respect to any gain  or income realized by  a Non-United States Holder
    upon the sale, exchange or retirement of a Security; and

        (c) a Security beneficially  owned by an individual  who at the time  of
    death  is a Non-United  States Holder will  not be subject  to United States
    federal estate tax  as a result  of such individual's  death, provided  that
    such  individual does not actually or constructively own ten percent or more
    of the total combined voting  power of all classes  of stock of the  company
    entitled  to vote within  the meaning of  Section 871(h)(3) of  the Code and
    provided that the interest payments with respect to such Security would  not
    have  been, if received at the  time of such individual's death, effectively
    connected with the  conduct of  a United States  trade or  business by  such
    individual.

                                       31
<PAGE>
    To  satisfy the statement  requirement referred to  in clause (a)(iv) above,
the beneficial owner of  such Security, or a  financial institution holding  the
Security  on behalf  of such owner,  must provide, in  accordance with specified
procedures, a paying agent of  the Company with a  statement to the effect  that
the  beneficial  owner  is  not  a United  States  person.  Pursuant  to current
temporary Treasury  regulations,  these requirements  will  be met  if  (1)  the
beneficial  owner provides  his or  her name  and address,  and certifies, under
penalties of  perjury, that  he or  she is  not a  United States  person  (which
certification  may be  made on  an IRS  Form W-8  (or successor  form) or  (2) a
financial institution holding  the Security  on behalf of  the beneficial  owner
certifies,  under penalties of perjury, that such statement has been received by
it and furnishes a paying agent with a copy thereof.

    Payments to  Non-United  States  Holders not  meeting  the  requirements  of
paragraph  (a) above  and thus subject  to withholding of  United States federal
income tax may nevertheless  be exempt from such  withholding if the  beneficial
owner of the Security provides the Company with a properly executed (1) IRS Form
1001  (or  successor  form) claiming  an  exemption from  withholding  under the
benefit of a tax treaty  or (2) IRS Form 4224  (or successor form) stating  that
interest  paid on the Security  is not subject to  withholding tax because it is
effectively connected with  the owner's conduct  of a trade  or business in  the
United States.

    BACKUP  WITHHOLDING  AND  INFORMATION REPORTING.    In  general, information
reporting requirements will  apply to certain  payments of principal,  interest,
and premium paid on Securities and to the proceeds of sale of a Security made to
United   States  Holders   other  than   certain  exempt   recipients  (such  as
corporations). A thirty-one percent (31%)  backup withholding tax will apply  to
such  payments  if  the  United  States  Holder  fails  to  provide  a  taxpayer
identification number  or certification  of foreign  or other  exempt status  or
fails to report in full dividend and interest income.

    No information reporting or backup withholding will be required with respect
to payments made by the Company or any paying agent to Non-United States Holders
if  a statement  described in clause  (a)(iv) under  "Non-United States Holders"
above has been received and  the payor does not  have actual knowledge that  the
beneficial owner is a United States person.

    In  addition, backup withholding and information reporting will not apply if
payments of  the principal,  interest, or  premium  on a  Security are  paid  or
collected  by a foreign office of a custodian, nominee or other foreign agent on
behalf of the beneficial  owner of such  Security, or if a  foreign office of  a
broker  (as defined in applicable Treasury regulations) pays the proceeds of the
sale of a Security to the  owner thereof. If, however, such nominee,  custodian,
agent  or  broker is,  for United  States  federal income  tax purposes,  a U.S.
person, a controlled foreign corporation or a foreign person that derives  fifty
percent  or more of its  gross income for certain periods  from the conduct of a
trade or business in  the United States,  such payments will  not be subject  to
backup withholding but will be subject to information reporting, unless (1) such
custodian, nominee, agent or broker has documentary evidence in its records that
the  beneficial owner is not a United States person and certain other conditions
are met  or  (2)  the  beneficial  owner  otherwise  establishes  an  exemption.
Temporary  Treasury regulations provide that the Treasury is considering whether
backup withholding  will  apply with  respect  to such  payments  of  principal,
interest  or the proceeds of  a sale that are  not subject to backup withholding
under the current regulations. Under proposed Treasury regulations not currently
in effect  backup withholding  will not  apply to  such payments  absent  actual
knowledge that the payee is a United States person.

    Payments  of  principal, interest,  and premium  on a  Security paid  to the
beneficial owner of a Security by a United States office of a custodian, nominee
or agent, or the payment by the United States office of a broker of the proceeds
of sale  of  a  Security,  will  be  subject  to  both  backup  withholding  and
information  reporting  unless  the  beneficial  owner  provides  the  statement
referred to in clause (a)(iv) above and the payor does not have actual knowledge
that the beneficial owner is a United States person or otherwise establishes  an
exemption.

    Any amounts withheld under the backup withholding rules will be allowed as a
refund  or  a credit  against such  holder's U.S.  federal income  tax liability
provided the required information is furnished to the IRS.

                                       32
<PAGE>
                              PLAN OF DISTRIBUTION

    The Company may sell the Securities being offered hereby (i) through agents,
(ii) through underwriters, (iii) through dealers, (iv) directly to purchasers or
to purchasers and  dealers (through  a specific  bidding or  auction process  or
otherwise), or through a combination of any such methods of sale.

    Securities  may be offered and sold through agents designated by the Company
from time  to  time. Any  such  agent  involved in  the  offer or  sale  of  the
Securities  in respect of which this Prospectus  is delivered will be named, and
any commissions payable by the Company to  such agent will be set forth, in  the
Prospectus  Supplement. Unless otherwise indicated in the Prospectus Supplement,
any such agent  will be acting  on a best  efforts basis for  the period of  its
appointment  (ordinarily three  business days  or less).  Any such  agent may be
deemed to be an underwriter,  as that term is defined  in the Securities Act  of
1933,  as amended (the "Securities Act"), of the Securities so offered and sold.
Agents may  be entitled  under agreements  which may  be entered  into with  the
Company  and the Guarantors to indemnification by the Company and the Guarantors
against certain liabilities, including liabilities under the Securities Act, and
may be customers  of, engage in  transactions with or  perform services for  the
Company or the Guarantors in the ordinary course of business.

    If  any  underwriter  or  underwriters  are  utilized  in  the  sale  of the
Securities,  the  Company  and  the  Guarantors  will  execute  an  underwriting
agreement  with such  underwriter or underwriters  at the time  an agreement for
such sale is  reached, and  the names of  the specific  managing underwriter  or
underwriters,  as  well  as  any  other  underwriters,  and  the  terms  of  the
transaction, including compensation  of the  underwriters and  dealers, if  any,
will  be  set forth  in the  Prospectus Supplement,  which will  be used  by the
underwriters to  make  resales  of  the Securities  in  respect  of  which  this
Prospectus  is delivered to the public.  The underwriters may be entitled, under
the relevant underwriting agreement, to  indemnification by the Company and  the
Guarantors   against  certain  liabilities,   including  liabilities  under  the
Securities Act.  Chemical Securities  Inc.,  Citicorp Securities,  Inc.,  Morgan
Stanley  & Co.  Incorporated and/or other  underwriters named  in the Prospectus
Supplement may  act as  managing  underwriter with  respect  to an  offering  of
Securities  effected  through  underwriters.  Only  underwriters  named  in  the
Prospectus Supplement  are deemed  to  be underwriters  in connection  with  the
Securities  offered thereby,  and if any  of Chemical  Securities Inc., Citicorp
Securities, Inc.  and Morgan  Stanley &  Co. Incorporated  is not  named in  the
Prospectus  Supplement, it  will not  be a  party to  the underwriting agreement
relating to such Securities, it will not be purchasing any such Securities  from
the  Company in  connection with  such offering  and it  will have  no direct or
indirect participation in the underwriting  of such Securities, although it  may
participate  in the distribution of such Securities under circumstances where it
may be entitled to a dealer's commission.

    If a dealer is utilized  in the sale of the  Securities in respect of  which
this  Prospectus  is delivered,  the Company  will sell  such Securities  to the
dealer, as principal. The dealer may  then resell such Securities to the  public
at varying prices to be determined by such dealer at the time of resale. Dealers
may be entitled, under agreements which may be entered into with the Company and
the  Guarantors, to  indemnification by the  Company and  the Guarantors against
certain liabilities, including liabilities under the Securities Act. The name of
the dealer and the terms of the transaction will be set forth in the  Prospectus
Supplement relating thereto.

    Offers  to purchase Securities may be  solicited directly by the Company and
sales thereof may be made by the Company directly to institutional investors  or
others.  The terms  of any  such sales,  including the  terms of  any bidding or
auction process  if utilized,  will be  described in  the Prospectus  Supplement
relating thereto.

    If  so  indicated  in the  Prospectus  Supplement  relating to  a  series of
Securities which provides Holders with the option to cause the Company to  repay
said  Securities prior to  maturity under specified  circumstances, the Company,
Amoco and Amoco  Company may reserve  the right  to elect, with  respect to  any
Securities  which  Holders  have  surrendered  for  repayment,  to  designate  a
purchaser which will purchase the Securities at a price equal to their repayment
price. The  purchaser may  resell  or otherwise  dispose  of the  Securities  so
purchased.  By surrendering the Securities for repayment, the Holders consent to
sell the Securities to any such  purchaser. If such purchaser fails to  purchase
any Securities, the Company will repay the Securities on the specified repayment
date.   If  a   purchaser  is   designated,  the   procedures  for  surrendering

                                       33
<PAGE>
any Securities and for  repayment will be determined  by mutual agreement  among
the Company, Amoco, Amoco Company, such purchaser, the Trustee and any paying or
escrow agent and will be set forth in the Prospectus Supplement.

    The  Securities may be publicly offered in  Argentina only by the Company or
agents, underwriters  or dealers  registered  as agents  under Article  6(d)  of
Argentine Law No. 17,811, as amended.

    The  place and time of  delivery of the Securities  in respect of which this
Prospectus is delivered are set forth in the accompanying Prospectus Supplement.

                                 LEGAL OPINIONS

    The validity of the Securities and Guarantees offered hereby will be  passed
upon  for the  Company, Amoco  and Amoco Company  by Daniel  B. Pinkert, General
Attorney-Corporate of Amoco and Vice President and Assistant Secretary of  Amoco
Company.  As of June 30, 1995, Mr.  Pinkert owned directly or indirectly through
the Amoco Performance Share  Plan, had interests in  the Amoco Employee  Savings
Plan  for, and  had options  to purchase,  an aggregate  of approximately 14,719
shares of  common  stock  of Amoco.  The  validity  of the  Securities  and  the
Guarantees  will also be passed upon for the Company, Amoco and Amoco Company by
Perez Alati, Grondona, Benites, Arntsen & Martinez de Hoz (h), Argentine counsel
for the Company, Amoco and Amoco Company.

    Certain matters of U.S. Federal and  New York law regarding the issuance  of
the  Securities and Guarantees will be  passed upon for underwriters and certain
other purchasers by  Simpson Thacher  & Bartlett (a  partnership which  includes
professional  corporations), New York, New York.  Simpson Thacher & Bartlett may
rely as to all matters of Indiana  law upon the opinion of Mr. Pinkert.  Certain
matters  of  Argentine law  regarding  the issuance  of  the Securities  and the
Guarantees will be passed upon for underwriters and certain other purchasers  by
Hope, Duggan & Silva, Buenos Aires, Argentina.

                                    EXPERTS

    The  consolidated financial  statements incorporated  in this  Prospectus by
reference to the  Amoco April  5, 1995  Form 8-K  have been  so incorporated  in
reliance  on the report of Price  Waterhouse LLP, independent accountants, given
on the authority of said firm as experts in auditing and accounting.

                                       34
<PAGE>
NO  DEALER,  SALESPERSON OR  OTHER INDIVIDUAL  HAS BEEN  AUTHORIZED TO  GIVE ANY
INFORMATION OR  TO MAKE  ANY REPRESENTATIONS  NOT CONTAINED  OR INCORPORATED  BY
REFERENCE  IN THIS  PROSPECTUS SUPPLEMENT  OR THE  PROSPECTUS, AND,  IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED BY THE COMPANY, THE  GUARANTORS OR THE UNDERWRITERS. THIS  PROSPECTUS
SUPPLEMENT  AND  THE  PROSPECTUS  DO  NOT  CONSTITUTE  AN  OFFER  TO  SELL  OR A
SOLICITATION OF ANY OFFER  TO BUY ANY  OF THE SECURITIES  OFFERED HEREBY IN  ANY
JURISDICTION  TO ANY PERSON  TO WHOM IT IS  UNLAWFUL TO MAKE  SUCH OFFER IN SUCH
JURISDICTION.  NEITHER  THE  DELIVERY  OF  THIS  PROSPECTUS  SUPPLEMENT  OR  THE
PROSPECTUS  NOR ANY SALE  MADE HEREUNDER SHALL,  UNDER ANY CIRCUMSTANCES, CREATE
ANY IMPLICATION THAT THE INFORMATION HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT
TO THE DATE  HEREOF OR  THAT THERE  HAS BEEN  NO CHANGE  IN THE  AFFAIRS OF  THE
COMPANY OR THE GUARANTORS SINCE SUCH DATE.

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

<TABLE>
<CAPTION>
                                                          PAGE
                                                          -----

<S>                                                    <C>
PROSPECTUS SUPPLEMENT
Use of Proceeds                                               S-2
Description of Securities Due 2005                            S-2
Underwriting                                                  S-5

PROSPECTUS
Available Information                                           2
Incorporation of Certain Documents by Reference                 2
The Company                                                     4
Amoco Corporation                                               4
Amoco Company                                                   4
Ratios of Earnings to Fixed Charges                             5
Selected Financial Data                                         5
Use of Proceeds                                                 7
Description of Securities                                       8
Limitations on Issuance of Bearer Securities                   28
Taxation                                                       28
Plan of Distribution                                           33
Legal Opinions                                                 34
Experts                                                        34
</TABLE>

Prospectus Supplement

AMOCO ARGENTINA OIL COMPANY
ARGENTINE BRANCH

U.S.$100,000,000
  % NEGOTIABLE OBLIGATIONS DUE 2005

UNCONDITIONALLY AND IRREVOCABLY
GUARANTEED BY

AMOCO CORPORATION AND
AMOCO COMPANY

                                     [LOGO]
CHEMICAL SECURITIES INC.
CITICORP SECURITIES, INC.
MORGAN STANLEY & CO.
        INCORPORATED

Dated September   , 1995


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