TOSCO CORP
S-4, 1997-05-21
PETROLEUM REFINING
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      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 21, 1997

                                          REGISTRATION STATEMENT NO. 333-_____

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                              ---------------------

                                    FORM S-4
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                             ----------------------
                                TOSCO CORPORATION
             (Exact name of registrant as specified in its charter)

  NEVADA                           2911                          95-1865716
(State or other            (Primary Standard                 (I.R.S. employer
jurisdiction of                Industrial                 identification number)
incorporation or           Classification Code
 organization)                  Number)


                             72 Cummings Point Road
                           Stamford, Connecticut 06902
                                 (203) 977-1000
               (Address, including zip code, and telephone number,
        including area code, of registrant's principal executive offices)

                            WILKES MCCLAVE III, ESQ.
                    SENIOR VICE PRESIDENT AND GENERAL COUNSEL
                             72 CUMMINGS POINT ROAD
                           STAMFORD, CONNECTICUT 06902
                                 (203) 977-1000
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                               -------------------
                                    COPY TO:

                             MARTIN H. NEIDELL, ESQ.
                          STROOCK & STROOCK & LAVAN LLP
                                 180 Maiden Lane
                          New York, New York 10038-4982
                           --------------------------

     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC: As soon as
practicable after this Registration Statement becomes effective.
                           --------------------------

     If the Securities being registered on this form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box. |_|

<TABLE>
<CAPTION>
                         CALCULATION OF REGISTRATION FEE
- -----------------------------------------------------------------------------------------------------------------------------------

                                                            Proposed                    Proposed
Title of each                      Amount to                Maximum                     Maximum                   Amount of
Class of                           be                       Offering Price              Aggregate                 Registration
Securities to be                   Registered               Per Unit(1)                 Offering                  Fee
Registered                                                                              Price(1)
- -----------------------------------------------------------------------------------------------------------------------------------
<C>                                <C>                                <C>               <C>                       <C>      
7.25% Notes due 2007               $200,000,000                       100%              $200,000,000              $  60,606
- -----------------------------------------------------------------------------------------------------------------------------------
7.80% Debentures due 2027          $300,000,000                       100%              $300,000,000              $  90,909
- -----------------------------------------------------------------------------------------------------------------------------------
7.90% Debentures due 2047          $100,000,000                       100%              $100,000,000              $  30,303
                                                                                                                  ---------
- -----------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                             $181,818
- -----------------------------------------------------------------------------------------------------------------------------------

(1)      Estimated solely for the purpose of calculating the
         registration fee in accordance with Rule 457(c) under the
         Securities  Act.
</TABLE>

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
<PAGE>
Information contained herein is subject to completion or amendment. A
registration statement relating to these securities has been filed with the
Securities and Exchange Commission. These securities may not be sold nor may
offers to buy be accepted prior to the time the registration statement becomes
effective. This prospectus shall not constitute an offer to sell or the
solicitation of an offer to buy nor shall there be any sale of these securities
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 MAY 21, 1997

PROSPECTUS
                                TOSCO CORPORATION

      Offer to Exchange $1,000 in principal amount of 7.25% Notes due 2007,
     7.80% Debentures due 2027, and 7.90% Debentures due 2047, respectively,
    for each $1,000 in principal amount of outstanding 7.25% Notes due 2007,
     7.80% Debentures due 2027, and 7.90% Debentures due 2047, respectively

     Tosco Corporation, a Nevada corporation ("Tosco" or the "Company") hereby
offers to exchange (the "Exchange Offer") up to $200,000,000 in aggregate
principal amount of a new series of its 7.25% Notes due 2007 (the "New Notes due
2007"), $300,000,000 in aggregate principal amount of its 7.80% Debentures due
2027 (the "New Debentures due 2027"), and $100,000,000 of its 7.90% Debentures
due 2047 (the "New Debentures due 2047") (collectively, the "Exchange Notes"),
respectively, for $200,000,000 in aggregate principal amount of its outstanding
7.25% Notes due 2007, $300,000,000 in aggregate principal amount of its
outstanding 7.80% Debentures Due 2027, and $100,000,000 in aggregate principal
amount of its outstanding 7.90% Debentures due 2047 (collectively, the "Notes"),
respectively.

     The terms of the Exchange Notes are substantially identical in all respects
(including principal amount, interest rate and maturity) to the terms of the
Notes for which they may be exchanged pursuant to this offer, except that the
Exchange Notes are freely transferable by holders thereof (except as provided in
the next paragraph below) and are issued free from any covenant regarding
registration. The Exchange Notes will evidence the same debt as the Notes and
will be entitled to the benefits of an indenture which is identical in all
material respects to the indenture governing the Notes. For a complete
description of the terms of the Exchange Notes, see "Description of the Exchange
Notes." The Company will not receive any cash proceeds from this offer.

     The Notes were originally issued and sold on January 14, 1997 in a
transaction not registered under the Securities Act of 1933, as amended (the
"Securities Act"), in reliance upon the exemption provided in section 4(2) of
the Securities Act. Accordingly, the Notes may not be reoffered, resold or
otherwise pledged, hypothecated or transferred in the United States unless so
registered or unless an applicable exemption from the registration requirements
of the Securities Act is available. Exchange Notes issued pursuant to the
Exchange Offer in exchange for Notes may be offered for resale, resold and
otherwise transferred by holders thereof (other than any holder which is an
"affiliate" of the Company within the meaning of Rule 405 under the Securities
Act) without compliance with the registration and prospectus delivery provisions
of the Securities Act provided that such Exchange Notes are acquired in the
ordinary course of such holders' business and such holders have no arrangement
with any person to participate in the distribution of such Exchange Notes.

     The Notes and the Exchange Notes constitute new issues of securities with
no established trading market. Any Notes not tendered and accepted in the
Exchange Offer will remain outstanding. To the extent that Notes are tendered
and accepted in the Exchange Offer, a holder's ability to sell untendered Notes
could be adversely affected. No assurance can be given as to the liquidity of
the trading market for either the Notes or the Exchange Notes. Tosco expects to
pay the principal of and interest on the Exchange Notes and Notes from its cash
flow from operations.

     The Exchange Offer is not conditioned upon any minimum aggregate principal
amount of Notes being tendered for exchange. The Exchange Offer will expire at
5:00 p.m., New York City time, on ____________, 1997, unless extended (the
"Expiration Date"). The date of acceptance for exchange of the Notes (the
"Exchange Date") will be the first business day following the Expiration Date.
Notes tendered pursuant to the Exchange Offer may be withdrawn at any time prior
to the Expiration Date; otherwise such tenders are irrevocable.

     Interest on the Exchange Notes shall accrue from the last January 1 or July
1 (an "Interest Payment Date") on which interest was paid on the Notes so
surrendered or, if no interest has been paid on such Notes, from January 1,
1997.

     SEE "RISK FACTOR" ON PAGE 8 FOR A DESCRIPTION OF CERTAIN FACTORS THAT
SHOULD BE CONSIDERED BY PARTICIPANTS IN THE EXCHANGE OFFER.

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

          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 date of this Prospectus is May __, 1997.
<PAGE>
     NO PERSON IS AUTHORIZED BY THE COMPANY TO GIVE ANY INFORMATION OR TO MAKE
ANY REPRESENTATIONS, OTHER THAN THOSE CONTAINED HEREIN, IN CONNECTION WITH THE
SOLICITATION AND THE OFFERING MADE BY THE PROSPECTUS, AND, IF GIVEN OR MADE,
SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE THE SOLICITATION OF OR AN OFFER
TO SELL, OR A SOLICITATION OF AN OFFER TO PURCHASE ANY SECURITIES IN ANY
JURISDICTION IN WHICH SUCH SOLICITATION OR OFFERING MAY NOT LAWFULLY BE MADE.

     NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY DISTRIBUTION OF SECURITIES
MADE HEREUNDER SHALL IMPLY THAT THERE HAS BEEN NO CHANGE IN THE INFORMATION SET
FORTH HEREIN OR IN THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.


                              AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith, files reports, proxy statements and other information with the
Securities and Exchange Commission (the "Commission"). Reports, proxy statements
and other information filed by the Company may be inspected and copied at the
public reference facilities maintained by the Commission at Room 1024, 450 Fifth
Street, N.W., Washington, D.C. 20549, as well as the regional offices of the
Commission at 7 World Trade Center (13th Floor), New York, New York 10048, and
Northwestern Atrium Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661-2511. Such reports and other information filed with the
Commission may also be available at the Commission's site on the World Wide Web
located at http://www.sec.gov. Copies of such information can be obtained by
mail from the Public Reference Section of the Commission at 450 Fifth Street,
N.W., Washington, D.C. 20549, at prescribed rates. Such materials can also be
inspected at the offices of the New York Stock Exchange, Inc. and the Pacific
Stock Exchange, Inc., on which exchanges the Company's Common Stock is listed.

     The Company has filed with the Commission a Registration Statement on Form
S-4 under the Securities Act, covering the Exchange Notes being offered hereby.
This Prospectus does not contain all of the information set forth in the
Registration Statement, certain parts of which have been omitted in accordance
with the rules and regulations of the Commission. For further information with
respect to the Company and the securities offered hereby, reference is made to
the Registration Statement, including the exhibits filed as a part thereof and
otherwise incorporated therein. Statements made in this Prospectus as to the
contents of any contract, agreement or other document referred to are not
necessarily complete. With respect to each such contract, agreement or other
document filed as an exhibit to the Registration Statement, reference is made to
such exhibit for a more complete description of the matter involved, and each
such statement shall be deemed qualified in its entirety by such reference.
Copies of the Registration Statement and the exhibits may be inspected, without
charge, at the offices of the Commission, or obtained at prescribed rates from
the Public Reference Section of the Commission at the address set forth above.
<PAGE>
                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents heretofore filed by the Company with the Commission
pursuant to the Exchange Act are incorporated by reference in this Prospectus:

     1. Annual Report on Form 10-K for the year ended December 31, 1996.

     2. Current report on Form 8-K reporting on an event which occurred March
31, 1997.

     3. Quarterly report on Form 10-Q for the quarterly period ended March 31,
1997.

     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act subsequent to the date of this Prospectus and prior to
the expiration of the Exchange Offer shall be deemed to be incorporated by
reference herein and to be a part hereof from the date of the filing of such
reports and documents. Any statement contained in a document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for the purposes of this Prospectus to the extent that a statement
contained herein or in any other subsequently filed document which also is
incorporated or is deemed to be incorporated by reference herein modifies or
supersedes such statement. Any statement so modified or superseded shall not be
deemed, except as so modified or superseded, to constitute a part of this
Prospectus.

     The Company will provide a copy of any or all of such documents (exclusive
of exhibits unless such exhibits are specifically incorporated by reference
therein), without charge, to each person to whom this Prospectus is delivered,
upon written or oral request to Joseph Watson, Investor Relations, Tosco
Corporation, 72 Cummings Point Road, Stamford, Connecticut 06902 (telephone
(203) 977-1000).
                               ------------------


                SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

     Certain of the matters discussed under the caption "The Company" and
elsewhere in this Prospectus or in the information incorporated by reference
herein may constitute forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995 and as such may involve known
and unknown risks, uncertainties and other factors that may cause the actual
results, performance or achievements of Tosco to be materially different from
any future results, performance or achievements expressed or implied by such
forward- looking statements.
<PAGE>
                                TABLE OF CONTENTS

AVAILABLE INFORMATION.............................................
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE...................
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS.................
PROSPECTUS SUMMARY................................................
RISK FACTOR.......................................................
  Absence of Public Market for the Exchange Notes on Resale
THE COMPANY.......................................................
  Acquisition of Unocal Refining and Marketing Assets.............
USE OF PROCEEDS...................................................
THE EXCHANGE OFFER................................................
  Purpose of the Exchange Offer...................................
  Terms of the Exchange...........................................
  Expiration Date; Extensions; Termination; Amendments............
  How to Tender...................................................
  Terms and Conditions of the Letter of Transmittal...............
  Withdrawal Rights...............................................
  Acceptance of Notes for Exchange; Delivery of Exchange Notes
  Conditions to the Exchange Offer................................
  Exchange Agent..................................................
  Solicitation of Tenders; Expenses...............................
  Other...........................................................
DESCRIPTION OF THE EXCHANGE NOTES.................................
  General.........................................................
  Redemption......................................................
  Covenants.......................................................
  Events of Default...............................................
  Consolidation, Merger, Sale or Conveyance.......................
  Satisfaction and Discharge of Indenture.........................
  Modification of the Indenture...................................
  Defeasance and Covenant Defeasance..............................
  Applicable Law..................................................
  Concerning the Trustee..........................................
  Certain Definitions.............................................
  Book-Entry; Delivery and Form...................................
DESCRIPTION OF THE NOTES..........................................
REGISTRATION RIGHTS AGREEMENT.....................................
INCOME TAX CONSIDERATIONS.........................................
LEGAL MATTERS.....................................................
EXPERTS...........................................................
<PAGE>
                               PROSPECTUS SUMMARY

     The following summary is qualified in its entirety by the detailed
information and the Consolidated Financial Statements (including the notes
thereto) incorporated by reference in this Prospectus.

                                   THE COMPANY

     Tosco is the largest independent refiner and marketer of petroleum products
in the United States, operating principally on the East and West Coasts, and is
also the nation's largest operator of company-controlled convenience stores.
Tosco has grown rapidly through acquisitions and internal growth. Since February
1996, the Company has more than tripled its retail operations and increased its
refining capacity by approximately 76% through the completion of three
acquisitions: (i) British Petroleum's ("BP") U.S. Northeast refining and
marketing assets on February 2, 1996; (ii) The Circle K Corporation ("Circle K")
on May 30, 1996; and (iii) Union Oil Company of California's ("Unocal") West
Cost petroleum refining, marketing and related supply and transportation assets
on March 31, 1997.

     The Company currently has approximately 950,000 barrels per day of refining
capacity and approximately 13 million gallons per day of retail fuel sales
through a retail network of approximately 5,200 sites, 4,600 of which sell fuel.
Operations at the 160,000 barrels per day Trainer refinery are currently
suspended while the plant is undergoing a modernization and upgrading program.
This program is expected to be completed and refinery operations should
recommence during the second quarter of 1997. Tosco's primary operating
facilities are located in Avon, California; Linden, New Jersey; Ferndale,
Washington; Trainer, Pennsylvania; Los Angeles, California (two sites); Rodeo,
California; and Santa Maria, California.


                               THE EXCHANGE OFFER

The Exchange Offer...............  The Company is offering to exchange (the
                                   "Exchange Offer") up to $200,000,000
                                   aggregate principal amount of a new series of
                                   its 7.25% Notes due January 1, 2007,
                                   $300,000,000 aggregate principal amount of a
                                   new series of its 7.80% Debentures due
                                   January 1, 2027, and $100,000,000 aggregate
                                   principal amount of a new series of its 7.90%
                                   Debentures due January 1, 2047 (collectively,
                                   the "Exchange Notes"), respectively, for
                                   $200,000,000 aggregate principal amount of
                                   its outstanding 7.25% Notes due 2007,
                                   $300,000,000 aggregate principal amount of
                                   its outstanding 7.80% Debentures due 2027,
                                   and $100,000,000 aggregate principal amount
                                   of its outstanding 7.90% Debentures due 2047
                                   (collectively, the "Notes"), respectively.
                                   The terms of the Exchange Notes are
                                   substantially identical in all respects
                                   (including principal amount, interest rate
                                   and maturity) to the terms of the Notes for
                                   which they may be exchanged pursuant to the
                                   Exchange Offer, except that the Exchange
                                   Notes are freely transferable by holders
                                   thereof (except as provided herein -- see
                                   "The Exchange Offer -- Terms of the
                                   Exchange"), and are not subject to any
                                   obligation regarding registration under the
                                   Securities Act.

Interest Payments................  Interest on the Exchange Notes shall accrue
                                   from the last January 1 or July 1 (an
                                   "Interest Payment Date") on which interest
                                   was paid on the Notes so surrendered or, if
                                   no interest has been paid on such Notes, from
                                   January 1, 1997.

Minimum Condition................  The Exchange Offer is not conditioned upon
                                   any minimum aggregate principal amount of
                                   Notes being tendered for exchange.

Expiration Date..................  The Exchange Offer will expire at 5:00 p.m.,
                                   New York City time, on ____________, 1997,
                                   unless extended.

Exchange Date....................  The date of acceptance for exchange of the
                                   Notes will be the first business day
                                   following the Expiration Date.

Conditions of the Exchange Offer.  The Company's obligation to consummate the
                                   Exchange Offer is subject to certain
                                   conditions, including the enactment of any
                                   statute, rule or regulation or taking of any
                                   action which would prohibit, restrict or
                                   render illegal the Exchange Offer or any
                                   changes relating to the ability to exchange
                                   Exchange Notes for the Notes. See "The
                                   Exchange Offer -- Conditions to the Exchange
                                   Offer." The Company reserves the right to
                                   terminate or amend the Exchange Offer at any
                                   time prior to the Expiration Date upon the
                                   occurrence of any such condition.

Withdrawal Rights................  Tenders may be withdrawn at any time prior to
                                   the Expiration Date. Otherwise, all tenders
                                   are irrevocable.

Procedures for Tendering Notes...  See "The Exchange Offer -- How to Tender."

Federal Income Tax
Consequences.....................  The exchange of Notes for Exchange Notes will
                                   not be a taxable exchange for Federal income
                                   tax purposes. See "Income Tax
                                   Considerations."

Effect on Holders of Notes.......  As a result of the making of, and upon
                                   acceptance for exchange of all validly
                                   tendered Notes pursuant to the terms of this
                                   Exchange Offer, there will be no increase in
                                   the interest rate on the Notes and the
                                   holders of the Notes will have no further
                                   registration rights relating thereto. Holders
                                   of the Notes who do not tender their Notes in
                                   the Exchange Offer will continue to hold such
                                   Notes and will be entitled to all the rights
                                   and limitations applicable thereto under the
                                   indenture dated as of May 1, 1996, as
                                   supplemented by the supplemental indenture
                                   dated as of January 14, 1997, among the
                                   Company and State Street Bank and Trust
                                   Company, relating to the Notes (the "Notes
                                   Indenture"), except for any such rights to
                                   register such Notes. All untendered Notes
                                   will continue to be subject to the
                                   restrictions on transfer provided for in the
                                   Notes and in the Notes Indenture. To the
                                   extent that Notes are tendered and accepted
                                   in the Exchange Offer, the trading market for
                                   untendered Notes could be adversely affected.
<PAGE>
                           TERMS OF THE EXCHANGE NOTES

     The Exchange Offer applies to $600,000,000 aggregate principal amount of
the Notes. The form and terms of the Exchange Notes are substantially the same
as the form and terms of the Notes except that the Exchange Notes have been
registered under the Securities Act and, therefore, will not bear legends
restricting the transfer thereof. The Exchange Notes will evidence the same debt
as the Notes and will be entitled to the benefits of the Indenture (as defined
herein), which will be identical in all material respects to the Notes
Indenture. See "Description of the Exchange Notes."

Securities Offered..............   $200,000,000 7.25% Notes due 2007.
                                   $300,000,000 7.80% Debentures due 2027.
                                   $100,000,000 7.90% Debentures due 2047.

Maturity........................   January 1, 2007 with respect to the New Notes
                                   due 2007, January 1, 2027 with respect to the
                                   New Debentures due 2027 and January 1, 2047
                                   with respect to the New Debentures due 2047.

Interest Payment Dates..........   January 1 and July 1 commencing July 1, 1997.

Redemption......................   None.

Collateral......................   None.

Ranking.........................   The Exchange Notes will be unsecured senior
                                   obligations of the Company, and will rank
                                   pari passu in right of payment with all
                                   existing and future unsecured senior
                                   indebtedness of the Company and senior in
                                   right of payment to all existing and future
                                   subordinated indebtedness of the Company.

                                   At December 31, 1996, the Company had
                                   outstanding $300 million of first mortgage
                                   bonds collateralized by its Avon Refinery,
                                   $150 million of first mortgage bonds
                                   collateralized by its Bayway Refinery and
                                   $110 million of other collateralized debt.
                                   The Notes are also outstanding. There is no
                                   other debt which is effectively senior to the
                                   Exchange Notes.

Use of Proceeds.................   These will be no cash proceeds to the Company
                                   from the Exchange Offer. See "Use of
                                   Proceeds" below.

Certain Covenants...............   The Indenture contains certain covenants
                                   that, among other things, limit the ability
                                   of the Company and its Subsidiaries to (i)
                                   incur Debt collateralized by a lien on a
                                   Principal Property and (ii) enter into a sale
                                   and lease back transaction, and limit the
                                   ability of the Company's Subsidiaries having
                                   a Principal Property to incur debt with a
                                   maturity greater than twelve months or issue
                                   preferred stock. See "Description of the
                                   Exchange Notes."
<PAGE>
                                   RISK FACTOR

     The following factor should be carefully considered in evaluating the
Exchange Notes offered hereby.

ABSENCE OF PUBLIC MARKET FOR THE EXCHANGE NOTES ON RESALE

     Prior to this offering, there has been no public trading market for the
Exchange Notes. Accordingly, there can be no assurance that any market for the
Exchange Notes will develop or, if one does develop, that it will be maintained.
If an active market for the Exchange Notes fails to develop or be sustained, the
trading price of the Exchange Notes could be materially adversely affected.

                                   THE COMPANY


     Tosco is the largest independent refiner and marketer of petroleum products
in the United States, operating principally on the East and West Coasts, and is
also the nation's largest operator of company-controlled convenience stores.
Tosco has grown rapidly through acquisitions and internal growth. Since February
1996, the Company has more than tripled its retail operations and increased its
refining capacity by approximately 76% through the completion of three
acquisitions: (i) British Petroleum's ("BP") U.S. Northeast refining and
marketing assets on February 2, 1996; (ii) The Circle K Corporation ("Circle K")
on May 30, 1996; and (iii) Union Oil Company of California's ("Unocal") West
Cost petroleum refining, marketing and related supply and transportation assets
on March 31, 1997.

     The Company currently has approximately 950,000 barrels per day of refining
capacity and approximately 13 million gallons per day of retail fuel sales
through a retail network of approximately 5,200 sites, 4,600 of which sell fuel.
Operations at the 160,000 barrels per day Trainer refinery are currently
suspended while the plant is undergoing a modernization and upgrading program.
This program is expected to be completed and refinery operations should
recommence during the second quarter of 1997. Tosco's primary operating
facilities are located in Avon, California; Linden, New Jersey; Ferndale,
Washington; Trainer, Pennsylvania; Los Angeles, California (two sites); Rodeo,
California; and Santa Maria, California.

ACQUISITION OF UNOCAL REFINING AND MARKETING ASSETS

     On March 31, 1997, Tosco acquired Unocal's West Coast petroleum refining,
marketing and related supply and transportation assets (the "Acquisition") for a
purchase price of approximately $1.4 billion, plus inventories valued at
approximately $380 million and credit card receivables valued at approximately
$133 million. In addition, Unocal is entitled to receive contingent
participation payments over the next seven years, up to a maximum amount of $250
million, if the margin on sales to branded dealers exceeds a base index and/or
the differential between California Air Resources Board Phase II gasoline and
conventional gasoline exceeds a base index. For a period of 25 years, Unocal
will be responsible for environmental liabilities arising out of or relating to
the period prior to the closing, except that Tosco will pay the first $7 million
of such environmental liabilities each year, plus 40% of any amounts in excess
of $7 million per year, with Unocal paying the remaining 60% each year. The
aggregate maximum amount that Tosco may have to pay in total for the 25 year
period for such environmental liabilities is limited to $200 million.

     The assets which were acquired from Unocal include the following: two
petroleum refining systems comprised of four sites in California with an
aggregate throughout capacity of 250,000 barrels per day; a retail gasoline
system, consisting of approximately 1,325 76-branded gasoline stations,
approximately 1,100 of which are company-controlled, which currently sells over
130,000 barrels per day of gasoline and diesel fuel; a distribution system
comprised of 13 company-owned oil storage terminals, three modern American-flag
40,000 deadweight-ton tankers and 1,500 miles of crude oil and product pipeline;
the worldwide rights to the "76" and "Union" brands, together with the
distinctive orange ball logo, in the petroleum refining and marketing
businesses, except for pre- existing license grants relating to 76 Truckstops
and to Uno-Ven; and Unocal's lubricants manufacturing, distribution and
marketing business. Tosco sold for $48.5 million in cash the three tankers it
acquired from Unocal.

     The purchase price paid pursuant to the Acquisition consisted of
approximately $1.4 billion of cash (including inventories) and 14,092,482 shares
of Common Stock of Tosco having an aggregate value of approximately $397
million. Certain of the service stations were purchased directly from Unocal for
approximately $235 million by a special purpose entity. Such entity leased the
service stations to Tosco pursuant to a long-term lease which provides Tosco
with the option to purchase the service stations at agreed upon prices. The
shares of Common Stock which Unocal received were valued at $28.1625 per share,
which was the average of the high and low Tosco stock prices for the ten trading
days preceding the closing date. The $1.4 billion cash portion of the purchase
price for the Acquisition, including working capital, was obtained from a
combination of Tosco's available cash, borrowings under Tosco's amended and
restated revolving credit agreement, borrowings under a $250 million credit
agreement entered into on March 31, 1997 and proceeds received from Tosco's sale
of the Notes.

     Tosco was incorporated under the laws of the State of Nevada in 1955. Its
principal executive offices are located at 72 Cummings Point Road, Stamford,
Connecticut 06902 and its telephone number is (203) 977-1000.

                                 USE OF PROCEEDS

     There will be no cash proceeds to the Company from the Exchange Offer.

     The Company received net proceeds of approximately $594,101,000 from the
issuance and sale of the Notes. The Company used such net proceeds to pay a
portion of the purchase price for the Acquisition.

                               THE EXCHANGE OFFER

PURPOSE OF THE EXCHANGE OFFER

     The Notes were originally issued and sold on January 14, 1997. Such sales
were not registered under the Securities Act in reliance upon the exemption
provided by Section 4(2) of the Securities Act. In connection with the sale of
the Notes, the Company agreed to file with the Commission a registration
statement relating to an exchange offer (the "Exchange Offer Registration
Statement") pursuant to which new series of unsecured debt obligations of the
Company covered by such registration statement and containing substantially the
same terms as the Notes, would be offered in exchange for Notes tendered at the
option of the holders thereof or, if applicable interpretations of the staff of
the Commission did not permit the Company to effect such an exchange offer, the
Company agreed, at its cost, to file a shelf registration statement covering
resales of the Notes (the "Shelf Registration Statement") and use all reasonable
efforts to have such Shelf Registration Statement declared effective and kept
effective for a period of three years from the effective date thereof. In the
event that (i) the Company failed to file the Exchange Offer Registration
Statement or, if applicable, the Shelf Registration Statement, (ii) the Exchange
Offer Registration Statement or, if applicable, the Shelf Registration
Statement, were not declared effective by the Commission, or (iii) all Notes
validly tendered are not accepted for exchange pursuant to the terms of the
Exchange Offer or the Shelf Registration Statement ceases to remain effective,
in each case within specified time periods, additional interest would accrue and
be payable in cash until completion of such filing, declaration of effectiveness
or completion of such exchange. See "Registration Rights Agreement."

     The purpose of the Exchange Offer is to fulfill the Company's obligations
with respect to the foregoing Registration Rights Agreement.

TERMS OF THE EXCHANGE

     The Company hereby offers to exchange, subject to the conditions set forth
herein and in the Letter of Transmittal accompanying this Prospectus, $1,000 in
principal amount of each series of Exchange Notes for each $1,000 in principal
amount of the respective corresponding series of Notes. The terms of the
Exchange Notes are substantially identical in all respects to the terms of the
Notes for which they may be exchanged pursuant to this Exchange Offer, except
that the Exchange Notes will generally be freely transferable by holders thereof
and will not be subject to any covenant regarding registration. The Exchange
Notes will evidence the same debt as the Notes and will be entitled to the
benefits of the Indenture, which will be substantially identical in all material
respects to the Notes Indenture. See "Description of the Exchange Notes."

     The Exchange Offer is not conditioned upon any minimum aggregate principal
amount of Notes being tendered for exchange.

     The Company believes that Exchange Notes issued pursuant to the Exchange
Offer in exchange for Notes may be offered for sale, resold and otherwise
transferred by any holder of such Exchange Notes (other than any such holder
which is an "affiliate" of the Company within the meaning of Rule 405 under the
Securities Act) without compliance with the registration and prospectus delivery
provisions of the Securities Act, provided that such Exchange Notes are acquired
in the ordinary course of such holder's business and such holder has no
arrangement or understanding with any person to participate in the distribution
of such Exchange Notes. Any holder who tenders in the Exchange Offer for the
purpose of participating in a distribution of the Exchange Notes must comply
with the registration and prospectus delivery requirements of the Securities Act
in connection with a secondary resale transaction.

     Interest on the Exchange Notes shall accrue from the last Interest Payment
Date on which interest was paid on the Notes so surrendered or, if no interest
has been paid on such Notes, from January 1, 1997.

     Tendering holders of the Notes shall not be required to pay brokerage
commissions or fees or, subject to the instructions in the Letter of
Transmittal, transfer taxes with respect to the exchange of the Notes pursuant
to the Exchange Offer.

EXPIRATION DATE; EXTENSIONS; TERMINATION; AMENDMENTS

     The Exchange Offer shall expire on the Expiration Date. The term
"Expiration Date" means 5:00 p.m., New York City time, on ____________, 1997,
unless the Company in its sole discretion extends the period during which the
Exchange Offer is open, in which event the term "Expiration Date" shall mean the
latest time and date on which the Exchange Offer, as so extended by the Company,
shall expire. The Company reserves the right to extend the Exchange Offer at any
time and from time to time by giving oral or written notice to State Street Bank
and Trust Company (the "Exchange Agent") and by timely public announcement
communicated, unless otherwise required by applicable law or regulation, by
making a release to the Dow Jones News Service. During any extension of the
Exchange Offer, all Notes previously tendered pursuant to the Exchange Offer
will remain subject to the Exchange Offer. In connection with the Exchange
Offer, Tosco will comply with all applicable requirements of the federal
securities laws, including, but not limited to, Rule 14e-1 under the Securities
Exchange Act of 1934.

     The Exchange Date will be the first business day following the Expiration
Date. The Company expressly reserves the right to (i) terminate the Exchange
Offer and not accept for exchange any Notes if either of the events set forth
below under "Conditions to the Exchange Offer" shall have occurred and shall not
have been waived by the Company and (ii) amend the terms of the Exchange Offer
in any manner which, in its good faith judgment, is advantageous to the holders
of the Notes, whether before or after any tender of the Notes. Unless the
Company terminates the Exchange Offer prior to 5:00 p.m. New York City time, on
the Expiration Date, the Company will exchange the Exchange Notes for the Notes
on the Exchange Date.

HOW TO TENDER

     The tender to the Company of Notes by a holder thereof pursuant to one of
the procedures set forth below will constitute an agreement between such holder
and the Company in accordance with the terms and subject to the conditions set
forth herein and in the Letter of Transmittal.

     A holder of Notes may tender the same by (i) properly completing and
signing the Letter of Transmittal or a facsimile thereof (all references in this
Prospectus to the Letter of Transmittal shall be deemed to include a facsimile
thereof) and delivering the same, together with the certificate or certificates
representing the Notes being tendered and any required signature guarantees, to
the Exchange Agent at its address set forth on the back cover of this Prospectus
on or prior to the Expiration Date (or complying with the procedure for
book-entry transfer described below) or (ii) complying with the guarantee
delivery procedures described below.

     If tendered Notes are registered in the name of the signer of the Letter of
Transmittal and the Exchange Notes to be issued in exchange therefor are to be
issued (and any untendered Notes are to be reissued) in the name of the
registered holder (which term, for the purpose described herein, shall include
any participant in The Depository Trust Company (also referred to as a
book-entry transfer facility) whose name appears on a security listing as the
owner of the Notes), the signature of such signer need not be guaranteed. In any
other case, the tendered Notes must be endorsed or accompanied by written
instruments of transfer in form satisfactory to the Company and duly executed by
the registered holder and the signature on the endorsement or instrument of
transfer must be guaranteed by a commercial bank or trust company located or
having an office or correspondent in the United States, or by a member firm of a
national securities exchange or of the National Association of Securities
Dealers, Inc. (any of the foregoing hereinafter referred to as an "Eligible
Institution"). If the Exchange Notes and/or Notes not exchanged are to be
delivered to an address other than that of the registered holder appearing on
the register for the Notes, the signature on the Letter of Transmittal must be
guaranteed by an Eligible Institution.

     THE METHOD OF DELIVERY OF NOTES AND ALL OTHER DOCUMENTS IS AT THE ELECTION
AND RISK OF THE HOLDER. IF SENT BY MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL,
RETURN RECEIPT REQUESTED, BE USED, PROPER INSURANCE OBTAINED, AND THE MAILING BE
MADE SUFFICIENTLY IN ADVANCE OF THE EXPIRATION DATE TO PERMIT DELIVERY TO THE
EXCHANGE AGENT ON OR BEFORE THE EXPIRATION DATE.

     The Exchange Agent will make a request promptly after the date of this
Prospectus to establish accounts with respect to the Notes at the book-entry
transfer facility for the purpose of facilitating the Exchange Offer, and
subject to the establishment thereof, any financial institution that is a
participant in the book-entry transfer facility's system may make book-entry
delivery of Notes by causing such book-entry transfer facility to transfer such
Notes into the Exchange Agent's account with respect to the Notes in accordance
with the book-entry transfer facility's procedures for such transfer. Although
delivery of Notes may be effected through book-entry transfer into the Exchange
Agent's account at the book-entry transfer facility, an appropriate Letter of
Transmittal with any required signature guarantee and all other required
documents must in each case be transmitted to and received or confirmed by the
Exchange Agent at its address set forth on the back cover page of this
Prospectus on or prior to the Expiration Date, or, if the guaranteed delivery
procedures described below are complied with, within the time period provided
under such procedures.

     If a holder desires to accept the Exchange Offer and time will not permit a
Letter of Transmittal or Notes to reach the Exchange Agent before the Expiration
Date or the procedure for book-entry transfer cannot be completed on a timely
basis, a tender may be effected if the Exchange Agent has received at its office
listed on the back cover of this Prospectus on or prior to the Expiration Date a
letter, telegram or facsimile transmission from an Eligible Institution setting
forth the name and address of the tendering holder, the names in which the Notes
are registered and, if possible the certificate numbers of the Notes to be
tendered, and stating that the tender is being made thereby and guaranteeing
that within five New York Stock Exchange trading days after the date of
execution of such letter, telegram or facsimile transmission by the Eligible
Institution, the Notes, in proper form for transfer (or a confirmation of
book-entry transfer of such Notes into the Exchange Agent's account at the
book-entry transfer facility), will be delivered by such Eligible Institution
together with a properly completed and duly executed Letter of Transmittal (and
any other required documents). Unless Notes being tendered by the
above-described method are deposited with the Exchange Agent within the period
set forth above (accompanied or preceded by a properly completed Letter of
Transmittal and any other required documents), the Company may, at its option,
reject the tender. Copies of a Notice of Guaranteed Delivery which may be used
by Eligible Institutions for the purposes described in this paragraph are
available from the Exchange Agent.

     A tender will be deemed to have been received as of the date when (i) the
tendering holder's properly completed and duly signed Letter of Transmittal
accompanied by the Notes (or a confirmation of book-entry transfer of such Notes
into the Exchange Agent's account at the book-entry transfer facility) is
received by the Exchange Agent, or (ii) a Notice of Guaranteed Delivery or
letter, telegram or facsimile transmission to similar effect (as provided above)
from an Eligible Institution is received by the Exchange Agent. Issuances of
Exchange Notes in exchange for Notes tendered pursuant to a Notice of Guaranteed
Delivery or letter, telegram or facsimile transmission to similar effect (as
provided above) by an Eligible Institution will be made only against deposit of
the Letter of Transmittal (and any other required documents) and the tendered
Notes.

     All questions as to the validity, form, eligibility (including time of
receipt) and acceptance for exchange of any tender of Notes will be determined
by the Company, whose determination will be final and binding. The Company
reserves the absolute right to reject any or all tenders not in proper form or
the acceptance for exchange of which may, in the opinion of the Company's
counsel, be unlawful. The Company also reserves the absolute right to waive any
of the conditions of the Exchange Offer or any defect or irregularity in the
tender of any Notes. None of the Company, the Exchange Agent or any other person
will be under any duty to give notification of any defects or irregularities in
tenders or incur any liability for failure to give any such notification.

TERMS AND CONDITIONS OF THE LETTER OF TRANSMITTAL

     The Letter of Transmittal contains, among other things, the following terms
and conditions, which are part of the Exchange Offer.

     The party tendering Notes for exchange (the "Transferor") exchanges,
assigns and transfers the Notes to the Company and irrevocably constitutes and
appoints the Exchange Agent as the Transferor's agent and attorney-in-fact to
cause the Notes to be exchanged, assigned and transferred. The Transferor
represents and warrants that it has full power and authority to tender,
exchange, assign and transfer the Notes and to acquire Exchange Notes issuable
upon the exchange of such tendered Notes, and that, when the same are accepted
for exchange, the Company will acquire good and unencumbered title to the
tendered Notes, free and clear of all liens, restrictions, charges and
encumbrances and not subject to any adverse claim. The Transferor also warrants
that it will, upon request, execute and deliver any additional documents deemed
by the Company to be necessary or desirable to complete the exchange, assignment
and transfer of tendered Notes or transfer ownership of such Notes on the
account books maintained by a book-entry transfer facility. The Transferor
further agrees that acceptance of any tendered Notes by the Company and the
issuance of Exchange Notes in exchange therefor shall constitute performance in
full by the Company of its obligations under the Registration Rights Agreement
and that the Company shall have no further obligations or liabilities
thereunder. All authority conferred by the Transferor will survive the death or
incapacity of the Transferor and every obligation of the Transferor shall be
binding upon the heirs, legal representatives, successors, assigns, executors
and administrators of such Transferor.

     The Transferor certifies that it is not an "affiliate" of the Company
within the meaning of Rule 405 under the Securities Act and that it is acquiring
the Exchange Notes offered hereby in the ordinary course of such Transferor's
business and that such Transferor has no arrangement with any person to
participate in the distribution of such Exchange Notes.

WITHDRAWAL RIGHTS

     Tenders of Notes pursuant to the Exchange Offer are irrevocable, except
that Notes tendered pursuant to the Exchange Offer may be withdrawn at any time
prior to the Expiration Date.

     To be effective, a written, telegraphic, telex or facsimile transmission
notice of withdrawal must be timely received by the Exchange Agent at its
address set forth on the back cover of this Prospectus. Any such notice of
withdrawal must specify the person named in the Letter of Transmittal as having
tendered Notes to be withdrawn, the certificate numbers of Notes to be
withdrawn, the principal amount of Notes to be withdrawn, a statement that such
holder is withdrawing his election to have such Notes exchanged, and the name of
the registered holder of such Notes, and must be signed by the holder in the
same manner as the original signature on the Letter of Transmittal (including
any required signature guarantees) or be accompanied by evidence satisfactory to
the Company that the person withdrawing the tender has succeeded to the
beneficial ownership of the Notes being withdrawn. The Exchange Agent will
return the properly withdrawn Notes promptly following receipt of notice of
withdrawal. If Notes have been tendered pursuant to the procedure for book-entry
entry transfer, any notice of withdrawal must specify the name and number of the
account at the book-entry transfer facility to be credited with the withdrawn
Notes or otherwise comply with the book-entry transfer facility procedure. All
questions as to the validity of notices of withdrawals, including time of
receipt, will be determined by the Company, and such determination will be final
and binding on all parties.

ACCEPTANCE OF NOTES FOR EXCHANGE; DELIVERY OF EXCHANGE NOTES

     Upon the terms and subject to the conditions of the Exchange Offer, the
acceptance for exchange of Notes validly tendered and not withdrawn and issuance
of the Exchange Notes will be made on the Exchange Date. For the purposes of the
Exchange Offer, the Company shall be deemed to have accepted for exchange
validly tendered Notes when, as and if the Company has given oral or written
notice thereof to the Exchange Agent.

     The Exchange Agent will act as agent for the tendering holders of Notes for
the purposes of receiving Exchange Notes from the Company and causing the Notes
to be exchanged, assigned and transferred. Upon the terms and subject to the
conditions of the Exchange Offer, delivery of Exchange Notes to be issued in
exchange for accepted Notes will be made by the Exchange Agent promptly after
acceptance of the tendered Notes. Tendered Notes not accepted for exchange by
the Company will be returned without expense to the tendering holders promptly
following the Expiration Date or, if the Company terminates the Exchange Offer
prior to the Expiration Date, promptly after the Exchange Offer is so
terminated.

CONDITIONS TO THE EXCHANGE OFFER

     Notwithstanding any other provision of the Exchange Offer, or any extension
of the Exchange Offer, the Company will not be required to issue Exchange Notes
in respect of any properly tendered Notes not previously accepted and may
terminate the Exchange Offer (by oral or written notice to the Exchange Agent
and by timely public announcement communicated, unless otherwise required by
applicable law or regulation, by making a release to the Dow Jones News
Service), or, at its option, modify or otherwise amend the Exchange Offer, if
either of the following events occur:

                  (a) any statute, rule or regulation shall have been enacted,
         or any action shall have been taken by any court or governmental
         authority which, in the sole judgment of the Company, would prohibit,
         restrict or otherwise render illegal consummation of the Exchange
         Offer, or

                  (b) there shall occur a change which permits the Exchange
         Notes issued pursuant to the Exchange Offer in exchange for Notes to be
         offered for resale, resold and otherwise transferred by holders thereof
         (other than any such holder which is an "affiliate" of the Company
         within the meaning of Rule 405 under the Securities Act) without
         compliance with the registration and prospectus delivery provisions of
         the Securities Act provided that such Exchange Notes are acquired in
         the ordinary course of such holders' business and such holders have no
         arrangements with any person to participate in the distribution of such
         Exchange Notes.

     The Company expressly reserves the right to terminate the Exchange Offer
and not accept for exchange any Notes upon the occurrence of either of the
foregoing conditions (which represent all of the material conditions to the
acceptance by the Company of properly tendered Notes). In addition, the Company
may amend the Exchange Offer at any time prior to the Expiration Date if either
of the conditions set forth above occurs. Moreover, regardless of whether either
of such conditions has occurred, the Company may amend the Exchange Offer in any
manner which, in its good faith judgment, is advantageous to holders of the
Notes.

     The foregoing conditions are for the sole benefit of the Company and may be
waived by the Company, in whole or in part, in its sole discretion. Any
determination made by the Company concerning an event, development or
circumstance described or referred to above will be final and binding on all
parties.

 EXCHANGE AGENT

     State Street Bank and Trust Company has been appointed as the Exchange
Agent for the Exchange Offer. Letters of Transmittal must be addressed to the
Exchange Agent at its address set forth on the back cover page of this
Prospectus. State Street Bank and Trust Company also acts as Transfer Agent (the
"Transfer Agent") under the Notes Indenture.

     Delivery to an address other than as set forth herein, or transmission of
instructions via a facsimile or telex number other than the ones set forth
herein, will not constitute a valid delivery.

SOLICITATION OF TENDERS; EXPENSES

     The Company has not retained any dealer-manager or similar agent in
connection with the Exchange Offer and will not make any payments to brokers,
dealers or others for soliciting acceptances of the Exchange Offer. The Company
will, however, pay the Exchange Agent reasonable and customary fees for its
services and will reimburse it for reasonable out-of-pocket expenses in
connection therewith. The Company will also pay brokerage houses and other
custodians, nominees and fiduciaries the reasonable out-of-pocket expenses
incurred by them in forwarding copies of this and related documents to the
beneficial owners of the Notes and in handling or forwarding tenders for their
customers.

     No person has been authorized to give any information or to make any
representations in connection with the Exchange Offer other than those contained
in this Prospectus. If given or made, such information or representation should
not be relied upon as having been authorized by the Company. Neither the
delivery of this Prospectus nor any exchange made hereunder shall, under any
circumstances, create any implication that there has been no change in the
affairs of the Company since the respective dates as of which information is
given herein. The Exchange Offer is not being made to (nor will tenders be
accepted from or on behalf of) holders of Notes in any jurisdiction in which the
making of the Exchange Offer or the acceptance thereof would not be in
compliance with the laws of such jurisdiction. The Company, may, however, at its
discretion, take such action as it may deem necessary to make the Exchange Offer
in any such jurisdiction and extend the Exchange Offer to holders of Notes in
such jurisdiction. In any jurisdiction the securities laws or blue sky laws of
which require the Exchange Offer to be made by a licensed broker or dealer, the
Exchange Offer is being made on behalf of the Company by one or more registered
brokers or dealers which are licensed under the laws of such jurisdiction.

OTHER

     Participation in the Exchange Offer is voluntary and holders should
carefully consider whether to accept. Holders of the Notes are urged to consult
their financial and tax advisors in making their own decisions on what action to
take.

     As a result of the making of, and upon acceptance for exchange of all
validly tendered Notes pursuant to the terms of, this Exchange Offer, the
Company will have fulfilled a covenant contained in the terms of the Notes and
the Registration Rights Agreement. Holders of the Notes who do not tender their
certificates in the Exchange Offer will continue to hold such certificates and
will be entitled to all the rights, and limitations applicable thereto, under
the Notes Indenture, except for any such rights under the Registration Rights
Agreement, which by their terms terminate or cease to have further effectiveness
as a result of the making of this Exchange Offer. See "Description of the
Notes." All untendered Notes will continue to be subject to the restrictions on
transfer set forth in the Notes Indenture. To the extent that Notes are tendered
and accepted in the Exchange Offer, the trading market for untendered Notes
could be adversely affected.

     The Company may in the future seek to acquire untendered Notes in open
market or privately negotiated transactions, through subsequent exchange offers
or otherwise. The Company has no present plan to acquire any Notes which are not
tendered in the Exchange Offer or to file a registration statement to permit
resales of any Notes which are not tendered pursuant to the Exchange Offer.

                        DESCRIPTION OF THE EXCHANGE NOTES

     The Exchange Notes will be unsecured general obligations of the Company and
will be issued under an indenture dated as of May 1, 1996, as supplemented by
the Supplemental Indenture dated as of May __, 1997 (the "Indenture"),
between the Company and State Street Bank and Trust Company (the "Trustee").

     The following description of certain terms of the Indenture and the
Exchange Notes does not purport to be complete and is subject to, and is
qualified in its entirety by reference to, the provisions of the Indenture,
including the definitions therein of certain terms. The Company will provide,
without charge, to each person, including any beneficial owner to whom this
Prospectus is delivered, upon such person's written or oral request, a copy of
the Indenture relating to the Exchange Notes. Any such request should be
delivered to the Company, 72 Cummings Point Road, Stamford, Connecticut 06902
(telephone (203) 977-1000), Attention: Investor Relations.

GENERAL

     The New Notes due 2007 will bear interest from their date of issue at the
rate of 7.25% per annum, the New Debentures due 2027 will bear interest from
their date of issue at the rate of 7.80% per annum and the New Debentures due
2047 will bear interest from their date of issue at the rate of 7.90% per annum.
Interest will be payable on January 1 and July 1 in each year, commencing July
1, 1997, to holders of record of such Exchange Notes at the close of business on
the preceding December 15 and June 15. The New Notes due 2007 will mature on
January 1, 2007, the New Debentures due 2027 will mature on January 1, 2027 and
the New Debentures due 2047 will mature on January 1, 2047. The Exchange Notes
will be limited to $600 million aggregate principal amount. The Exchange Notes
are not subject to any sinking fund.

REDEMPTION

     The Exchange Notes are not redeemable at any time prior to maturity.

COVENANTS

     The Indenture contains various covenants, including the following:

     Limitation on Liens. The Company will not, and will not permit any
Subsidiary to, incur any Debt secured by a Lien on any Principal Property
without making effective provision for securing all Outstanding Debt Securities
of each series having the benefit of this covenant equally and ratably with such
Debt as to such Principal Property.

     The foregoing restrictions will not apply to: (i) Liens existing at the
date of original issuance of the Notes; (ii) any Liens securing Debt owed by the
Company to one or more Subsidiaries of the Company; (iii) Liens on any Principal
Property of a Person existing prior to the time (A) such Person becomes a
Subsidiary of the Company, (B) such Person merges into or consolidates with a
Subsidiary of the Company or (C) another Subsidiary of the Company merges into
or consolidates with such Person (in a transaction in which such Person becomes
a Subsidiary of the Company); (iv) Liens on any Principal Property existing at
the time of acquisition thereof; (v) Liens on any Principal Property to secure
Debt incurred for the purpose of financing all or any part of the purchase price
or the cost of construction or improvement of the Principal Property subject to
such Liens in an aggregate principal amount not to exceed the fair market value
of such property, construction or improvements; (vi) Liens on any Principal
Property of the Company or any Subsidiary in favor of governmental bodies to
secure certain advance or progress payments pursuant to any contract or statute;
and (vii) Liens to secure any extension, renewal, refinancing or refunding (or
successive extensions, renewals, refinancings or refundings), in whole or in
part, of any Debt secured by Liens referred to in the foregoing clauses (i)
through (vi), so long as such Lien does not extend to any other property and the
Debt so secured is not increased.

     Notwithstanding the foregoing, the Company or any Subsidiary may incur Debt
secured by Liens which otherwise would be subject to the foregoing restrictions,
in an aggregate amount which, together with all other such Debt outstanding
secured by Liens and all Attributable Debt outstanding in respect of Sale and
Leaseback Transactions (other than as permitted by the first paragraph under the
"Limitation on Sale and Leaseback Transactions" covenant below), does not exceed
10% of Consolidated Net Tangible Assets.

     Limitation on Sale and Leaseback Transactions. The Company will not, and
will not permit any Subsidiary to, enter into any Sale and Leaseback Transaction
on any Principal Property (except for a period not exceeding three years)
unless: (i) the Company or such Subsidiary would be entitled to incur a Lien to
secure Debt by reason of the provisions described in clauses (i) through (vii)
of the second paragraph under the "Limitation on Liens" covenant in an amount
equal to the Attributable Debt of such Sale and Leaseback Transaction without
equally and ratably securing all Outstanding Debt Securities of each series
having the benefit of this covenant or (ii) the Company or such Subsidiary
applies within 180 days an amount equal to, in the case of a sale or transfer
for cash, the net proceeds (not exceeding the net book value), and, otherwise,
an amount equal to the fair value (as determined by its Board of Directors), of
the property so leased to (A) the retirement of Debt Securities or other Funded
Debt of the Company or such Subsidiary or (B) the acquisition of property which
constitutes a Principal Property.

     Notwithstanding the foregoing, the Company or any Subsidiary may enter into
a Sale and Leaseback Transaction which would otherwise be subject to the
foregoing restriction, provided the amount of Attributable Debt in respect of
such Sale and Leaseback Transaction, together with all other such Attributable
Debt outstanding and all Debt outstanding secured by Liens (other than as
permitted by the second paragraph under the "Limitations on Liens" covenant
above), does not exceed 10% of Consolidated Net Tangible Assets.

     Limitation on Subsidiary Funded Debt and Preferred Stock. The Company will
not permit any Subsidiary of the Company having a Principal Property to incur or
suffer to exist any Funded Debt or issue any Preferred Stock except: (i) Funded
Debt outstanding under the Bank Credit Facility; (ii) Funded Debt or Preferred
Stock outstanding on the date of original issuance of the Notes; (iii) Funded
Debt or Preferred Stock issued to and held by the Company or a Subsidiary of the
Company; (iv) Funded Debt incurred or Preferred Stock issued by a Person prior
to the time (A) such Person became a Subsidiary of the Company, (B) such Person
merges into or consolidates with a Subsidiary of the Company or (C) another
Subsidiary of the Company merges into or consolidates with such Person (in a
transaction in which such Person becomes a Subsidiary of the Company); (v)
Funded Debt or Preferred Stock incurred for the purpose of financing all or any
part of the purchase price or the cost of construction of or improvements to the
property of the Company or any of its Subsidiaries in an aggregate principal
amount or liquidation preference, as the case may be, not to exceed the fair
market value of such property, construction or improvements; and (vi) Funded
Debt or Preferred Stock that is exchanged for, or the proceeds of which are used
to refinance or refund, any Funded Debt or Preferred Stock permitted to be
outstanding pursuant to clauses (i) through (v) (or any extension or renewal
thereof) in an aggregate principal amount or liquidation preference, as the case
may be (which, in the case of a Discount Security, shall be the issue price
thereof), not to exceed the principal amount of the Funded Debt or the
liquidation preference of the Preferred Stock, as the case may be, so exchanged,
refinanced or refunded (which, in the case of a Discount Security, shall be the
accreted value thereof).

     Notwithstanding the foregoing, the Company's Subsidiaries may incur Funded
Debt and Preferred Stock in an aggregate principal amount and liquidation
preference that does not exceed 10% of Consolidated Net Tangible Assets.

EVENTS OF DEFAULT

     The Indenture defines the following events as "Events of Default": (a)
failure to pay interest on the Exchange Notes after the interest becomes due and
payable and continuance of such default for a period of 30 days; (b) failure to
pay all or any portion of the principal of the Exchange Notes when such
principal becomes due and payable, whether at maturity or otherwise, without any
grace period; (c) default in the performance, or breach, of any other covenant
of the Company for the benefit of the Exchange Notes that continues for a period
of 30 days (or such other period specified in such other document) after written
notice of such default has been given (i) to the Company by the Trustee or (ii)
to the Company and the Trustee by the holders of at least 25% of the Exchange
Notes then outstanding; or (d) certain events of bankruptcy, insolvency, or
reorganization which are voluntary or, if involuntary, continue for a period of
90 days.

     The Indenture provides that the Trustee shall notify the holders of the
Exchange Notes of any continuing default known to the Trustee which has occurred
with respect to the Exchange Notes within 90 days after the occurrence thereof.
The Indenture provides that notwithstanding the foregoing, except in the case of
default in the payment of the principal of or interest on the Exchange Notes,
the Trustee may withhold such notice if the Trustee in good faith determines
that the withholding of such notice is in the interests of the holders of the
Exchange Notes.

     The Indenture provides that if an Event of Default (other than an Event of
Default described in clause (d) above) with respect to the Exchange Notes shall
have occurred and be continuing, either the Trustee or the holders of not less
than 25% in aggregate principal amount of the Exchange Notes then outstanding
may declare the principal amount of, and accrued and unpaid interest on, the
Exchange Notes to be due and payable immediately. Upon certain conditions such
acceleration may be annulled. The Indenture provides that if an Event of Default
described in clause (d) shall have occurred and be continuing, the principal
amount of (and accrued and unpaid interest on) the Exchange Notes shall ipso
facto become due and payable immediately, without any declaration or other act
on the part of the Trustee or any holder. Any past defaults and the consequences
thereof (except a default in the payment of principal of or interest on the
Exchange Notes) may be waived by the holders of a majority in principal amount
of the Exchange Notes then outstanding. The Indenture also permits the Company
not to comply with certain covenants in the Indenture with respect to the
Exchange Notes upon waiver by the holders of a majority in principal amount of
the Exchange Notes then outstanding.

     Subject to the provisions of the Indenture relating to the duties of the
Trustee, in case an Event of Default with respect to the Exchange Notes shall
occur and be continuing, the Trustee shall not be under any obligation to
exercise any of the trust powers vested in it by the Indenture at the request or
direction of any of the holders of the Exchange Notes, unless such holders shall
have offered to the Trustee reasonable security or indemnity. The holders of a
majority in aggregate principal amount of the Exchange Notes then outstanding
shall have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee under the Indenture or
exercising any trust power conferred on the Trustee with respect to the Exchange
Notes; provided that the Trustee may refuse to follow any direction which is in
conflict with any law or the Indenture and subject to certain other limitations.

     No holder of the Exchange Notes will have any right by virtue or by
availing of any provision of the Indenture to institute any proceeding at law or
in equity or in bankruptcy or otherwise upon or under or with respect to the
Indenture or for any remedy thereunder, unless such holder shall have previously
given the Trustee written notice of an Event of Default with respect to the
Exchange Notes and unless also the holders of at least 25% in aggregate
principal amount of the outstanding Exchange Notes shall have made written
request, and offered reasonable indemnity, to the Trustee to institute such
proceeding as trustee and the Trustee shall have failed to institute such
proceeding within 60 days after its receipt of such request, and the Trustee
shall not have received from the holders of a majority in aggregate principal
amount of the outstanding Exchange Notes a direction inconsistent with such
request. However, the right of a holder of any Exchange Note to receive payment
of the principal of and any interest on such Exchange Note on or after the due
dates expressed in such Exchange Note, or to institute suit for the enforcement
of any such payment on or after such dates, shall not be impaired or affected
without the consent of such holder.

CONSOLIDATION, MERGER, SALE OR CONVEYANCE

     The Indenture provides that the Company may consolidate with, or sell,
convey or lease all or substantially all of its assets to, or merge with or
into, any other corporation, if (i) either the Company is the continuing
corporation, or the successor corporation is a domestic corporation and
expressly assumes the due and punctual payment of the principal of and interest
on the Exchange Notes outstanding under the Indenture according to their tenor
and the due and punctual performance and observance of all of the covenants and
conditions of the Indenture to be performed or observed by the Company and (ii)
immediately after such merger or consolidation, or such sale, conveyance or
lease, no Event of Default, and no event which, after notice or lapse of time or
both, would become an Event of Default, shall have occurred and be continuing.

SATISFACTION AND DISCHARGE OF INDENTURE

     The Indenture with respect to the Exchange Notes (except for certain
specified surviving obligations including, among other things, the Company's
obligation to pay the principal of and interest on the Exchange Notes) will be
discharged and canceled upon the satisfaction of certain conditions, including
the payment of all principal of and interest on all the Exchange Notes or the
deposit with the Trustee of cash or appropriate Government Obligations or a
combination thereof sufficient for such payment or redemption in accordance with
the Indenture and the terms of the Exchange Notes.

MODIFICATION OF THE INDENTURE

     The Indenture contains provisions permitting the Company and the Trustee,
with the consent of the holders of not less than a majority in aggregate
principal amount of the Exchange Notes at the time outstanding under the
Indenture, to execute supplemental indentures adding any provisions to, or
changing in any manner or eliminating any of the provisions of, the Indenture or
any supplemental indenture with respect to the Exchange Notes or modifying in
any manner the rights of the holders of the Exchange Notes; provided that no
such supplemental indenture may (i) extend the stated maturity of the principal
of any Exchange Note, or reduce the principal amount thereof or any premium
thereon, or reduce the rate or extend the time of payment of any interest
thereof, or reduce any amount payable on redemption thereof (including any
amount with respect to original issue discount), or reduce the amount of
original issue discount security payable upon acceleration or provable in
bankruptcy, or impair or affect the right of any holder of Exchange Notes to
institute suit for payment thereof, or any right of repayment at the option of
the holders of the Exchange Notes, without the consent of the holder of each
Exchange Note so affected, or (ii) reduce the aforesaid percentage of Exchange
Notes the consent of holders of which is required for any such supplemental
indenture, without the consent of the holders of all Exchange Notes so affected.
Additionally, in certain prescribed instances, including the establishment of
the forms or terms of the Exchange Notes, the Company and the Trustee may
execute supplemental indentures without the consent of the holders of the
Exchange Notes.

DEFEASANCE AND COVENANT DEFEASANCE

     The Indenture provides that the Company may elect either (a) to terminate
(and be deemed to have satisfied) all its obligations with respect to such
Exchange Notes (except for the obligations to register the transfer of such
Exchange Notes, to replace mutilated, destroyed, lost or stolen Exchange Notes,
to maintain an office or agency in respect of the Exchange Notes, to compensate
and indemnify the Trustee and to punctually pay or cause to be paid the
principal of, and interest on, all Exchange Notes when due) ("defeasance") or
(b) to be released from its obligations with respect to such Exchange Notes upon
the deposit with the Trustee, in trust for such purpose, of money and/or
Government Obligations which through the payment of principal and interest in
accordance with their terms will provide money, in an amount sufficient (in the
opinion of a nationally recognized firm of independent public accountants) to
pay the principal of and interest, if any, on the outstanding Exchange Notes, on
the scheduled due dates therefor. Such a trust may be established only if, among
other things, the Company has delivered to the Trustee an opinion of counsel (as
specified in the Indenture) with regard to certain matters, including an opinion
to the effect that the holders of such Exchange Notes will not recognize income,
gain or loss for federal income tax purposes as a result of such deposit and
discharge and will be subject to federal income tax on the same amounts and in
the same manner and at the same times as would have been the case if such
deposit and defeasance had not occurred.

APPLICABLE LAW

     The Exchange Notes and the Indenture will be governed by, and construed in
accordance with, the laws of the State of New York.

 CONCERNING THE TRUSTEE

     The Trustee may provide various commercial banking services to the Company
from time to time.

CERTAIN DEFINITIONS.

     The terms set forth below are defined in the Indenture as follows:

     "Attributable Debt" when used in connection with a Sale and Leaseback
Transaction involving a Principal Property shall mean, at the time of
determination, the present value of the total net amount of rent required to be
paid under such lease during the remaining term thereof (including any renewal
term or period for which such lease has been extended), discounted at the rate
of interest set forth or implicit in the terms of such lease or, if not
practicable to determine such rate, the weighted average interest rate per annum
borne by the Exchange Notes pursuant to the Indenture compounded semi-annually.
For purposes of the foregoing definition, rent shall not include amounts
required to be paid by the lessee on account of insurance, taxes, assessments,
utility, operating and labor costs and similar charges. In the case of any lease
which is terminable by the lessee upon the payment of a penalty, such net amount
shall also include the amount of the penalty, but no rent shall be considered as
required to be paid under such lease subsequent to the first date upon which it
may be so terminated.

     "Bank Credit Facility" means the bank facility provided for under the
Fourth Amended and Restated Credit Agreement, dated as of January 14, 1997,
among the Company and the banks that are or become parties from time to time
thereto, as it may be amended, supplemented or otherwise modified from time to
time, and any successor or replacement bank facility thereto.

     "Consolidated Net Tangible Assets" means the total of all the assets
appearing on the consolidated balance sheet of the Company and its Subsidiaries,
less the following: (a) liabilities, (b) intangible assets, including, without
limitation, such items as goodwill, trademarks, trade names, patents and
unamortized debt discount and expense carried as an asset on said balance sheet,
and (c) appropriate adjustment on account of minority interests of other Persons
holding stock in any Subsidiary. Consolidated Net Tangible Assets shall be
determined in accordance with generally accepted accounting principles applied
on a consistent basis and shall be determined by reference to the most recent
publicly available quarterly or annual, as the case may be, consolidated balance
sheet of the Company. "Debt" of a Person means, all indebtedness of such Person
which is for money borrowed.

     "Funded Debt" means Debt which by its terms matures at, or can be extended
or renewed at the option of the obligor to, a date more than twelve months after
the date of the Debt's creation, including, but not limited to, outstanding
revolving credit loans.

     "Government Obligations" means, unless otherwise specified pursuant to the
Indenture, securities which are (i) direct obligations of the United States
government for which its full faith and credit is pledged or (ii) obligations of
a person controlled or supervised by, or acting as an agency or instrumentality
of, the United States government, the payment of which obligations is
unconditionally guaranteed by the United States government, and which, in either
case, are full faith and credit obligations of the United States government, and
which are not callable or redeemable at the option of the issuer thereof prior
to their stated maturity.

     "Incur" means to issue, incur, assume, guarantee, become liable,
contingently or otherwise, with respect to, or otherwise become responsible for
the payment of, any Debt.

     "Lien" means any mortgage or deed of trust, pledge, assignment, security
interest, lien, charge, or other encumbrance or preferential arrangement
(including, without limitation, any conditional sale or other title retention
agreement having substantially the same economic effect as any of the
foregoing).

     "Preferred Stock," as applied to the Capital Stock of any Person, means
Capital Stock of such Person of any class or classes (however designated) that
ranks prior, as to the payment of dividends or as to the distribution of assets
upon any voluntary or involuntary liquidation, dissolution or winding up of such
Person, to shares of Capital Stock of any other class of such Person.

     "Principal Property" means (i) any refining or processing plant (together
with any pipeline, terminal or other facility related to such refining or
processing plant and necessary for its economic operation) or corporate offices,
in any case owned or leased by the Company or any Subsidiary, or any interest of
the Company or any Subsidiary in such property (in each case including the real
estate related thereto) located within the United States of America and (ii) any
Capital Stock of any Subsidiary that owns, directly or indirectly, a Principal
Property of the type described in clause (i).

     "Sale and Leaseback Transaction" of any Person means an arrangement with
any lender or investor or to which such lender or investor is a party providing
for the leasing by such person of any property or asset of such Person which has
been or is being sold or transferred by such Person more than one year after the
acquisition thereof or the completion of construction or commencement of
operation thereof to such lender or investor or to any person to whom funds have
been or are to be advanced by such lender or investor on the security of such
property or asset. The stated maturity of such arrangement shall be the date of
the last payment of rent or any other similar amount due under such arrangement
prior to the first date on which such arrangement may be terminated by the
lessee without payment of a penalty.

     "Subsidiary" means any corporation, association, partnership or other
business entity of which more than 50% of the total voting power of the
outstanding capital stock (or other interests entitled (without regard to the
occurrence of any contingency) to vote in the election of directors, general
partners, managers, managing members, managing partners or trustees thereof or,
if such persons are not elected, to vote on any matter that is submitted to the
vote of all persons holding ownership interests in such entity) is at the time
owned or controlled, directly or indirectly, by (i) the Company, (ii) the
Company and one or more Subsidiaries or (iii) one or more Subsidiaries.

BOOK-ENTRY; DELIVERY AND FORM

     The certificates representing the Exchange Notes will be issued in fully
registered form, without coupons. The Exchange Notes will be deposited with, or
on behalf of, The Depository Trust Company, New York, New York ("DTC") and
registered in the name of Cede & Co. as DTC's nominee in the form of a global
Exchange Note certificate for each series of Exchange Notes.

                            DESCRIPTION OF THE NOTES

     The terms of the Notes are substantially identical in all respects
(including principal amount, interest rate and maturity) to the terms of the
Exchange Notes for which they may be exchanged pursuant to this Exchange Offer,
except that the Notes are not freely transferable by holders thereof and were
issued subject to certain covenants regarding registration as provided therein
and in the Registration Rights Agreement dated January 14, 1997 among the
Company and various purchasers (the "Registration Rights Agreement") (which
covenants will terminate and be of no further force or effect upon completion of
this Exchange Offer). See "Registration Rights Agreement."

                          REGISTRATION RIGHTS AGREEMENT

     Pursuant to a Registration Rights Agreement among the Company and the
initial purchasers of the Notes, the Company agreed to file with the Commission
and use all reasonable efforts to cause to become effective the Exchange Offer
Registration Statement. Under existing Commission interpretations set forth in
several no-action letters to third parties, the Exchange Notes would in general
be freely transferable (other than by holders who are broker dealers or by an
affiliate of the Company) after the Exchange Offer without further registration
under the Securities Act. In the event that due to a change in current
interpretations by the Commission, the Company is not permitted to effect such
Exchange Offer, it is contemplated that the Company will instead file a Shelf
Registration Statement and will use all reasonable efforts to cause such Shelf
Registration Statement to become effective and to keep such Shelf Registration
Statement effective for three years from the effective date thereof. The Company
shall, in the event of the filing of a Shelf Registration Statement, provide to
each holder of the Notes copies of the prospectus and notify each such holder
when the Shelf Registration Statement has become effective. A holder that sells
Notes pursuant to a Shelf Registration Statement generally will be required to
be named as a selling security holder in the related prospectus and to deliver a
current prospectus to purchasers, and will be subject to certain of the civil
liability provisions under the Securities Act in connection with such sales.

     Under the Registration Rights Agreement, the Company has agreed to use
reasonable efforts to: (i) file the Exchange Offer Registration Statement or a
Shelf Registration Statement with the Commission as promptly as reasonably
practicable, (ii) have such Exchange Offer Registration Statement or Shelf
Registration Statement declared effective by the Commission, and (iii) commence
the Exchange Offer and issue the Exchange Notes in exchange for all Notes
validly tendered in accordance with the terms of the Exchange Offer prior to the
close of the Exchange Offer, or, in the alternative, cause such Shelf
Registration Statement to remain effective for three years from the effective
date thereof.

     If the Company fails to comply with the above provisions, additional
interest (the "Penalty Interest") shall be assessed as follows:

         (i) If the Exchange Offer Registration Statement or Shelf Registration
Statement is not filed by June 13, 1997, then commencing on June 14, 1997,
Penalty Interest shall be accrued on the Notes over and above the accrued
interest at a rate of .25% per annum immediately following June 13, 1997;

        (ii) If an Exchange Offer Registration Statement or Shelf Registration
Statement is filed pursuant to (i) above and is not declared effective by July
13, 1997, then commencing on July 14, 1997, Penalty Interest shall be accrued on
the Notes over and above the accrued interest at a rate of .25% per annum
immediately following July 13, 1997; and

     (iii) If neither (A) the Company has exchanged Exchange Notes for all Notes
validly tendered in accordance with the terms of the Exchange Offer on or prior
to 35 days after the date on which the Exchange Offer Registration Statement was
declared effective, nor (B) if applicable, the Shelf Registration Statement has
been declared effective and such Shelf Registration Statement ceases to be
effective prior to three years from its original effective date, then Penalty
Interest shall be accrued on the Notes over and above the accrued interest at a
rate of .25% per annum immediately following the (x) 36th day after such
effective date, in the case of (A) above, or (y) the day such Shelf Registration
Statement ceases to be effective in the case of (B) above.

      provided, however, that the Penalty Interest rate on the Notes may not
exceed .25% per annum; and, provided, further, that (1) upon the filing of the
Exchange Offer Registration Statement or Shelf Registration Statement (in the
case of (i) above), (2) upon the effectiveness of the Exchange Offer
Registration Statement or Shelf Registration Statement (in the case of (ii)
above), or (3) upon the exchange of Exchange Notes for all Notes tendered or
upon the effectiveness of the Shelf Registration Statement which had ceased to
remain effective prior to three years from its original effective date (in the
case of (iii) above), Penalty Interest on the Notes as a result of such clause
(i), (ii) or (iii) shall cease to accrue.

      Any amounts of Penalty Interest due pursuant to clauses (i), (ii), or
(iii) above will be payable in cash, on the same original payment dates of the
Notes. The amount of Penalty Interest will be determined by multiplying the
applicable Penalty Interest rate by the principal amount of the Notes,
multiplied by a fraction, the numerator of which is the number of days such
Penalty Interest rate was applicable during such period (determined on the basis
of a 360-day year comprised of twelve 30-day months), and the denominator of
which is 360.

     The Company is entitled to close the Exchange Offer provided that it has
accepted all Notes theretofore validly tendered in accordance with the terms of
the Exchange Offer. Notes not tendered in the Exchange Offer shall bear interest
at the same rates as in effect at the time of issuance of the Notes.

                            INCOME TAX CONSIDERATIONS

     The exchange of Notes for Exchange Notes will not constitute a recognition
event for federal income tax purposes. Consequently, no gain or loss will be
recognized by holders upon receipt of the Exchange Notes. For purposes of
determining gain or loss upon the subsequent sale or exchange of Exchange Notes,
a holder's basis in Exchange Notes will be the same as such holder's basis in
the Notes exchanged therefor. Holders will be considered to have held the
Exchange Notes from the time of their original acquisition of the Notes.

                                  LEGAL MATTERS

     The validity of the Exchange Notes offered hereby will be passed upon for
the Company by Stroock & Stroock & Lavan LLP of New York, New York.

                                     EXPERTS

     The financial statements incorporated by reference in this Prospectus have
been incorporated herein in reliance on the report of Coopers & Lybrand, L.L.P.,
independent accountants, given on the authority of that firm as experts in
accounting and auditing.
<PAGE>
                       STATE STREET BANK AND TRUST COMPANY
                                 EXCHANGE AGENT

By Hand/Overnight Express Mail:

         State Street Bank and Trust Company
         Two International Plaza
         Boston, Massachusetts  02110

By Facsimile:

         (617) 664-5371

By Telephone:

         (617) 786-3000
<PAGE>
                                    PART II.
                     INFORMATION NOT REQUIRED IN PROSPECTUS


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The Restated Articles of Incorporation of the Registrant provide that the
Registrant shall, to the fullest extent provided by the Nevada General
Corporation Law (the "Nevada GCL"), indemnify any and all persons whom it shall
have the power to indemnify under the Nevada GCL from and against any and all of
the expenses, liabilities or other matters referred to in or covered by the
Nevada GCL. The indemnification provided for in the Registrant's Restated
Articles of Incorporation shall not be deemed exclusive of any other rights to
which those indemnified may be entitled under any By-Law, agreement, vote of
stockholders or disinterested Directors, statute, rule or by common law or
otherwise.

     The By-Laws of the Registrant also provide certain indemnification rights
to the Directors and officers of the Registrant.

     The Registrant continues to maintain Directors and officers liability
insurance policies. The Registrant presently carries $15 million of such
coverage under a policy maintained with a wholly-owned subsidiary of the
Registrant engaged in the insurance business in Bermuda. In addition, the
Registrant carries $50,000,000 of Directors and officers liability coverage
under policies maintained with private unaffiliated insurance carriers. The
insurance subsidiary has deposited in trust the insurance premiums received by
it from the Registrant which will be used to pay losses which are covered by the
insurance policy issued by such subsidiary.

     The Restated Articles of Incorporation of the Registrant include a
provision which eliminates the liability of Directors and officers to the
Registrant or its stockholders for damages for breaches of their fiduciary duty,
except for liability (i) for acts or omissions which involve intentional
misconduct, fraud or a knowing violation of law; or (ii) for the payment of
dividends in violation of the provisions of the Nevada GCL which provide that
directors who, willfully or with gross negligence, permit the payment of a
dividend or the making of a distribution other than as permitted by the Nevada
GCL are jointly and severally liable for the lesser of the amount of the
dividend or the loss sustained by reason of the dividend or other distribution
to stockholders.

     Under Nevada law, absent the foregoing provision, Directors and officers
would be liable for negligence or misconduct in the performance of their duties
to the Registrant. The provision absolves Directors and officers of liability
for negligence, including gross negligence, in the performance of their duties.
They will remain liable for acts or omissions which involve intentional
misconduct, fraud, a knowing violation of law or a violation of the provision
referred to above concerning payment of dividends. The provision has no effect
on the availability of equitable remedies such as injunction or rescission upon
breach of such duty. In addition, the Registrant understands that the Commission
takes the position that the provision will not affect the liability of such
persons under the federal securities laws. The Commission's position appears to
be that (1) the Nevada law authorizing this provision by its terms only permits
the elimination or limitation for breach of fiduciary duty as a director or
officer, which is a state law liability and not one imposed by the federal
securities laws, and (2) the federal securities laws preempt attempts by the
states to limit liability for violations of such laws. However, these issues
have not been litigated and are unresolved at the present time. The Nevada law
authorizing this provision does not state whether charter amendments adopted
pursuant thereto will apply prospectively only or whether they will also apply
to acts or omissions which are alleged to have occurred prior to their adoption
and the Nevada courts have not addressed such issue. In the event that such
amendments are determined by the Nevada courts to apply retroactively, the
Registrant intends the provision to have such retroactive application.

     Registrant has entered into indemnification agreements with its Directors
which provide them with certain indemnification rights.
<PAGE>
ITEM 16.  EXHIBITS.

4.1  -    Form of Indenture between Registrant and State Street
          Bank and Trust Company, as Trustee,  relating to Debt
          Securities.  Incorporated by reference to Exhibit 4.1
          to Registration Statement on  Form S-3 (File No.
          333-521).

4.2  -    Supplemental Indenture dated May    , 1997 relating to Exchange Notes.

5    -    Opinion of Stroock & Stroock & Lavan LLP as to the legality of the
          Exchange Notes.

12   -    Statement regarding computation of ratio of earnings to fixed charges.

23.1 -    Consent of Stroock & Stroock & Lavan LLP (included in Exhibit 5).

23.2 -    Consent of Coopers & Lybrand, L.L.P.

24.1 -    Power of attorney (included on signature page of this Registration
          Statement).

25   -    Statement of Eligibility and Qualification under the
          Trust Indenture Act of 1939 on Form T-1 of  State
          Street Bank and Trust Company.  

ITEM 17.  UNDERTAKINGS.

     (a) The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange
Act (and, where applicable, each filing of an employee benefit plan's annual
report pursuant to Section 15(d) of the Exchange Act) that is incorporated by
reference in the Registration Statement shall be deemed to be a new registration
statement relating to the securities offered therein and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.

     (b) The undersigned Registrant hereby undertakes that:

          (1) For purposes of determining any liability under the Securities
Act, the information omitted from the form of prospectus filed as part of this
Registration Statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this Registration
Statement as of the time it was declared effective.

          (2) For the purpose of determining any liability under the Securities
Act, each post-effective amendment that contains a form of prospectus shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

     (c) Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to Directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Commission such indemnification is
against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a Director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
Director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.

     (d) The undersigned Registrant hereby undertakes:

          (1) To respond to requests for information that is incorporated by
reference into the prospectus pursuant to Item 4, 10(b), 11 or 13 of this form,
within one business day of receipt of such request, and to send the incorporated
documents by first class mail or other equally prompt means. This includes
information contained in documents filed subsequent to the effective date of the
Registration Statement through the date of responding to the request.

          (2) To supply by means of a post-effective amendment all information
concerning a transaction, and the company being acquired involved therein, that
was not the subject of and included in the registration statement when it became
effective.

     (e) Pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K, the Registrant
hereby agrees to furnish to the Commission upon request any instrument
evidencing long-term debt of the Registrant that is not being filed as an
exhibit hereto.
<PAGE>
                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Stamford, State of Connecticut, on May 21, 1997.


                                   TOSCO CORPORATION

                                   By:  /S/ THOMAS D. O'MALLEY
                                        Thomas D. O'Malley
                                        Chairman of the Board of Directors
                                        and Chief Executive Officer

                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Thomas D. O'Malley, Jefferson F. Allen and Wilkes
McClave III, and each of them, his true and lawful attorneys-in-fact and agents
with full power of substitution and resubstitution for him and in his name,
place and stead, in any and all capacities, to sign any or all amendments
(including post-effective amendments) of and supplements to this Registration
Statement and any Registration Statement relating to any offering made pursuant
to this Registration Statement that is to be effective upon filing pursuant to
Rule 462(b) under the Securities Act, and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto such attorney-in-fact and agents and each of
them full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, to all intents and
purposes and as fully as they might or could do in person, hereby ratifying and
confirming all that such attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.

Signature                             TITLE                             DATE

/S/ THOMAS D. O'MALLEY       Chairman of the Board of Directors    May 21,1997
- ----------------------       and Chief Executive Officer
Thomas D. O'Malley

/S/ JEFFERSON F. ALLEN       Principal Financial Officer           May 21, 1997
- ----------------------       and Director
Jefferson F. Allen

/S/ ROBERT I. SANTO          Principal Accounting Officer          May 21, 1997
- ------------------
Robert I. Santo

                             Director                              May   , 1997
- -----------------
Wayne A. Budd

/S/ PATRICK M. DEBARROS      Director                              May 21, 1997
- -----------------------
Patrick M. deBarros

/S/ HOUSTON I. FLOURNOY      Director                              May 21, 1997
- -----------------------
Houston I. Flournoy

/S/ EDMUND A. HAJIM          Director                              May 21, 1997
- -------------------
Edmund A. Hajim

/S/ JOSEPH P. INGRASSIA      Director                              May 21, 1997
- -----------------------
Joseph P. Ingrassia

/S/ CHARLES J. LUELLEN       Director                              May 21, 1997
- ----------------------
Charles J. Luellen

/S/ MARK R. MULVOY           Director                              May 21, 1997
- ------------------
Mark R. Mulvoy

                             Director                              May   , 1997
- -------------------
Eija Malmivirta
<PAGE>
                                  EXHIBIT INDEX

EXHIBIT                     DESCRIPTION

4.1   -   Form of Indenture between Registrant and State Street Bank and Trust
          Company, as Trustee, relating to Debt Securities.  Incorporated by 
          reference to Exhibit 4.1 to Registration Statement on Form S-3 
          (File No. 333-521).

4.2   -   Supplemental Indenture dated May    , 1997 relating to Exchange Notes.

5     -   Opinion of Stroock & Stroock & Lavan LLP as to the legality of
          the Exchange Notes.

12    -   Statement regarding computation of ratio of earnings to fixed charges.

23.1  -   Consent of Stroock & Stroock & Lavan LLP (included in Exhibit 5).

23.2  -   Consent of Coopers & Lybrand, L.L.P.

24.1  -   Power of attorney (included on signature page of this Registration
          Statement).

25    -   Statement of Eligibility and Qualification under the Trust Indenture
          Act of 1939 on Form T-1 of State Street Bank and Trust Company.
          
<PAGE>

                                                                    EXHIBIT 4.2
                             SUPPLEMENTAL INDENTURE

     SUPPLEMENTAL INDENTURE dated as of May __, 1997 (the "Supplemental
Indenture"), to the Indenture, dated as of May 1, 1996 (the "Indenture"),
between TOSCO CORPORATION, a Nevada corporation (hereinafter called the
"Company"), and STATE STREET BANK AND TRUST COMPANY, a trust company organized
under the laws of the Commonwealth of Massachusetts (hereinafter called the
"Trustee").


                             RECITALS OF THE COMPANY

     WHEREAS, the Company has duly authorized the execution and delivery of the
Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (hereinafter called the
"Securities") to be issued in one or more series, as provided in the Indenture;

     WHEREAS, the Company desires and has requested the Trustee to join it in
the execution and delivery of this Supplemental Indenture in order to establish
and provide for the issuance by the Company of three new series of Securities
designated as (i) its 7.25% Notes due 2007 (the "Notes due 2007") in the
aggregate principal amount of $200,000,000, a specimen copy of which is attached
hereto as Exhibit A; (ii) its 7.80% Debentures due 2027 (the "Debentures due
2027") in the aggregate principal amount of $300,000,000, a specimen copy of
which is attached hereto as Exhibit B; and (iii) its 7.90% Debentures due 2047
(the "Debentures due 2047") in the aggregate principal amount of $100,000,000, a
specimen copy of which is attached hereto as Exhibit C (the Notes due 2007,
Debentures due 2027 and Debentures due 2047 are collectively referred to herein
as the "Notes"), all on the terms set forth herein;

     WHEREAS, Section 8.1 of the Indenture provides that a supplemental
indenture may be entered into by the Company and the Trustee without the consent
of any holder of any Securities to, inter alia, (a) establish the terms of any
Securities as permitted by Sections 2.1 and 2.3 of the Indenture, provided
certain conditions are met, (b) add to the covenants of the Company and (c)
change certain provisions of the Indenture when there is no Outstanding Security
of any affected Series under the Indenture;

     WHEREAS, the conditions set forth in the Indenture for the execution and
delivery of this Supplemental Indenture have been complied with; and

     WHEREAS, all things necessary to make this Supplemental Indenture a valid
agreement of the Company and the Trustee, in accordance with its terms, and a
valid amendment of, and supplement to, the Indenture have been done.

     NOW THEREFORE:

     There are hereby established three new series (as that term is used in
Section 2.3 of the Indenture) of Securities to be issued under the Indenture,
which series of Securities shall have the terms set forth herein and in the
Notes, and in consideration of the premises and the exchange for and acceptance
of the Notes by the holders thereof, the Company mutually covenants and agrees
with the Trustee, for the equal and proportionate benefit of all holders of the
Notes, that the Indenture is supplemented and amended, to the extent and for the
purposes expressed herein, as follows:


                                   ARTICLE ONE

                      SCOPE OF THIS SUPPLEMENTAL INDENTURE;
                    GENERAL TERMS AND CONDITIONS OF THE NOTES

     Section 1.1. CHANGES, ETC. APPLICABLE ONLY TO THE NOTES. The changes,
modifications and supplements to the Indenture effected by this Supplemental
Indenture shall be applicable only with respect to, and govern the terms of, the
Notes, which shall be limited in aggregate principal amount to $600,000,000,
except as provided in Section 2.3(b) of the Indenture, and shall not apply to
any other Securities which may be issued under the Indenture unless a
supplemental indenture with respect to such other Securities specifically
incorporates such changes, modifications and supplements.

     Section 1.2 DESIGNATION AND PRINCIPAL AMOUNT. There are hereby authorized
three new series of Notes, designated (a) the "Notes due 2007", limited in
aggregate principal amount to $200,000,000, (b) the "Debentures due 2027",
limited in aggregate principal amount to $300,000,000 and (c) the "Debentures
due 2047", limited in aggregate principal amount to $100,000,000. The amounts of
the Notes shall be as set forth in any written order of the Company for the
authentication and delivery of Notes pursuant to Section 2.4 of the Indenture.

     Section 1.3 MATURITY. The Maturity Date of the Notes due 2007 is January 1,
2007, the Maturity Date of the Debentures due 2027 is January 1, 2027 and the
Maturity Date of the Debentures due 2047 is January 1, 2047.

     Section 1.4 FORM AND PAYMENT. (a) The Notes shall be issued in fully
registered certificated form without coupons in denominations of $100,000 in
principal amount and integral multiples of $1,000 in excess thereof. Principal
and interest on the Notes issued in certificated form will be payable and the
transfer of such Notes will be registrable at the office or agency of the
Trustee; provided, however, that payment of interest may be made at the option
of the Company by check mailed to the Holder at such address as shall appear in
the Security Register.

     (b) In accordance with Section 2.3 of the Indenture, the Notes are subject
to the terms set forth in this Supplemental Indenture including, without
limitation, Exhibits A, B and C hereto, the terms of which are hereby
incorporated in their entirety by reference. In addition to the other terms of
the Notes which are set forth elsewhere in this Supplemental Indenture and
Exhibits A, B and C hereto, the Notes are subject to all of the provisions of
the Indenture as supplemented by this Supplemental Indenture, except as
otherwise provided in this Supplemental Indenture.

     (c) The Notes shall have the Trustee's Certificate of Authentication
endorsed thereon substantially in the form of Exhibit A, B or C, as applicable,
to this Supplemental Indenture.

     Section 1.5 DEPOSITARY.

     So long as Notes are eligible for book-entry settlement with the
Depositary, or unless otherwise required by law, all Notes that are so eligible
may be represented by one or more Notes in global form ("Global Notes")
registered in the name of the Depositary or the nominee of the Depositary,
except as otherwise specified below. The transfer and exchange of beneficial
interests in any such Notes in global form shall be effected through the
Depositary in accordance with the Indenture and the procedures of the Depositary
therefor.

     The Depositary shall be a clearing agency registered under the Exchange
Act. The Company initially appoints DTC to act as Depositary with respect to the
Notes in global form. Initially, the Global Notes shall be issued to DTC,
registered in the name of Cede & Co., as the nominee of DTC, and deposited with
the Trustee as custodian for Cede & Co.

     If at any time the Depositary for the Global Notes notifies the Company
that it is unwilling or unable to continue as Depositary for such Notes, the
Company may appoint a successor Depositary with respect to such Notes. If a
successor Depositary for the Notes is not appointed by the Company within 90
days after the Company receives such notice, the Company will execute, and the
Trustee, upon receipt of an Officers' Certificate for authentication and
delivery of Notes, will authenticate and deliver Notes in definitive form, in an
aggregate principal amount equal to the principal amount of the Global Notes, in
exchange for the Global Notes.

     Definitive Notes issued in exchange for all or a part of a Global Note
pursuant to this Section 1.5 shall be registered in such names and in such
authorized denominations as the Depositary, pursuant to instructions from its
direct or indirect participants or otherwise, shall instruct the Trustee. Upon
execution and authentication, the Trustee shall deliver such definitive Notes to
the person in whose names such definitive Notes are so registered.

     At such time as all interests in a Global Note have been redeemed,
exchanged, repurchased or canceled, such Global Note shall be, upon receipt
thereof, canceled by the Trustee in accordance with standing procedures and
instructions of the Depositary. At any time prior to such cancellation, if any
interest in a Global Note is exchanged for definitive Notes, redeemed,
exchanged, repurchased by the Company or canceled, or transferred for part of a
Global Note, the principal amount of such Global Note shall, in accordance with
the standing procedures and instructions of the Depositary, be reduced or
increased, as the case may be, and an endorsement shall be made on such Global
Note by, or at the direction of, the Trustee to reflect such reduction or
increase.

     1.6 ORIGINAL ISSUE OF NOTES. Notes in the aggregate principal amount of up
to $600,000,000 may, upon execution of this Supplemental Indenture, be executed
by the Company and delivered to the Trustee for authentication, and the Trustee
shall thereupon authenticate and make available for delivery said Notes to or
upon the written order of the Company, signed by its Chairman, its Vice
Chairman, its Executive Vice President, its President, or any Vice President and
its Treasurer, any Assistant Treasurer, Secretary or any Assistant Secretary,
without any further action by the Company.


                                   ARTICLE TWO

                           AMENDMENTS TO THE INDENTURE

     Section 2.1. AMENDMENTS TO SECTION 1.1. Section 1.1 of the Indenture is
hereby amended by adding the following definitions in their proper alphabetical
order:

          "Affiliate" has the same meaning as given to that term in Rule 405 of
     the Securities Act.

          "Attributable Debt" when used in connection with a Sale and Leaseback
     Transaction involving a Principal Property shall mean, at the time of
     determination, the present value of the total net amount of rent required
     to be paid under such lease during the remaining term thereof (including
     any renewal term or period for which such lease has been extended),
     discounted at the rate of interest set forth or implicit in the terms of
     such lease or, if not practicable to determine such rate, the weighted
     average interest rate per annum borne by the Securities of each Series
     outstanding pursuant to this Indenture compounded semi-annually. For
     purposes of the foregoing definition, rent shall not include amounts
     required to be paid by the lessee on account of insurance, taxes,
     assessments, utility, operating and labor costs and similar charges. In the
     case of any lease which is terminable by the lessee upon the payment of a
     penalty, such net amount shall also include the amount of the penalty, but
     no rent shall be considered as required to be paid under such lease
     subsequent to the first date upon which it may be so terminated.

          "Bank Credit Facility" means the bank facility provided for under the
     Fourth Amended and Restated Credit Agreement, dated as of January 14, 1997,
     among the Company and the banks that are or become parties from time to
     time thereto, as it may be amended, supplemented or otherwise modified from
     time to time, and any successor or replacement bank facility thereto.

          "Consolidated Net Tangible Assets" means the total of all the assets
     appearing on the consolidated balance sheet of the Company and its
     Subsidiaries, less the following: (a) liabilities, (b) intangible assets,
     including, without limitation, such items as goodwill, trademarks, trade
     names, patents and unamortized debt discount and expense carried as an
     asset on said balance sheet, and (c) appropriate adjustment on account of
     minority interests of other persons holding stock in any Subsidiary.
     Consolidated Net Tangible Assets shall be determined in accordance with
     generally accepted accounting principles applied on a consistent basis and
     shall be determined by reference to the most recent publicly available
     quarterly or annual, as the case may be, consolidated balance sheet of the
     Company.

          "covenant defeasance" has the meaning specified in Section
     10.1(b)(iii).

          "DTC" means The Depository Trust Company.

          "Funded Debt" means Debt which by its terms matures at, or can be
     extended or renewed at the option of the obligor to, a date more than
     twelve months after the date of the Debt's creation, including, but not
     limited to, outstanding revolving credit loans.

          "Global Notes" has the meaning specified in Section 1.5.

          "Indebtedness" of a Person means, without duplication, (a) all
     indebtedness of such Person which is (i) for money borrowed or (ii)
     evidenced by a bond, debenture, note or similar instrument or letter of
     credit given in connection with the acquisition of any businesses,
     properties or assets of any kind other than trade accounts payable or
     accrued liabilities arising in the ordinary course of business; (b)
     obligations of such Person as lessee under leases required to be
     capitalized on the balance sheet of the lessee under generally accepted
     accounting principles and leases of property or assets made as part of any
     sale and leaseback transaction to which such Person is a party; (c)
     amendments, renewals, extensions, modifications, refundings and
     refinancings of any indebtedness or obligations referred to in clause (a)
     or (b); and (d) guarantees by such Person of any indebtedness or
     obligations of the type referred to in clause (a), (b) or (c).

          "Original Notes" means the debt securities issued by the Company
     pursuant to the Original Supplemental Indenture.

          "Original Supplemental Indenture" means the supplemental indenture
     dated as of January 14, 1997, to the Indenture.

          "Preferred Stock", as applied to the Capital Stock of any Person,
     means Capital Stock of such Person of any class or classes (however
     designated) that ranks prior, as to the payment of dividends or as to the
     distribution of assets upon any voluntary or involuntary liquidation,
     dissolution or winding up of such Person, to shares of Capital Stock of any
     other class of such Person.

          "Principal Property" means (i) any refining or processing plant
     (together with any pipeline, terminal or other facility related to such
     refining or processing plant and necessary for its economic operation) or
     corporate offices, in any case owned or leased by the Company or any
     Subsidiary, or any interest of the Company or any Subsidiary in such
     property (in each case including the real estate related thereto) located
     within the United States of America and (ii) any Capital Stock of any
     Subsidiary that owns, directly or indirectly, a Principal Property of the
     type described in clause (i).

          "Sale and Leaseback Transaction" of any Person means an arrangement
     with any lender or investor or to which such lender or investor is a party
     providing for the leasing by such person of any property or asset of such
     Person which has been or is being sold or transferred by such Person more
     than one year after the acquisition thereof or the completion of
     construction or commencement of operation thereof to such lender or
     investor or to any person to whom funds have been or are to be advanced by
     such lender or investor on the security of such property or asset. The
     stated maturity of such arrangement shall be the date of the last payment
     of rent or any other similar amount due under such arrangement prior to the
     first date on which such arrangement may be terminated by the lessee
     without payment of a penalty.

          "Securities Act" means the Securities Act of 1933, as amended from
     time to time, or any successor legislation.

     Section 2.2. AMENDMENT TO SECTION 2.3. Section 2.3 of the Indenture is
hereby amended by deleting paragraph (u) in its entirety and inserting instead
the following new paragraph (u):

              (u)  the application, if any, of either or both
         of Sections 10.1(b)(ii) or 10.1(b)(iii) to the
         Securities  of the Series.

     Section 2.3. AMENDMENT TO ARTICLE III. Article III of the Indenture is
hereby amended by adding the following Sections 3.5 through 3.8:

          SECTION 3.5 Limitation on Liens. (a) The Company shall not, and shall
     not permit any Subsidiary to, incur any Debt secured by a Lien on any
     Principal Property without making effective provision for securing all
     Outstanding Securities of each Series having the benefit of this covenant
     equally and ratably with such Debt as to such Principal Property.

          (b) With respect to any particular Series of Securities, the foregoing
     restrictions will not apply to: (i) Liens existing at the date of original
     issuance of such Series of Securities; (ii) any Liens securing Debt owed by
     the Company to one or more Subsidiaries of the Company; (iii) Liens on any
     Principal Property of a Person existing prior to the time (A) such Person
     becomes a Subsidiary of the Company, (B) such Person merges into or
     consolidates with a Subsidiary of the Company or (C) another Subsidiary of
     the Company merges into or consolidates with such Person (in a transaction
     in which such Person becomes a Subsidiary of the Company); (iv) Liens on
     any Principal Property existing at the time of acquisition thereof; (v)
     Liens on any Principal Property to secure Debt incurred for the purpose of
     financing all or any part of the purchase price or the cost of construction
     or improvement of the Principal Property subject to such Liens in an
     aggregate principal amount not to exceed the fair market value of such
     property, construction or improvements; (vi) Liens on any Principal
     Property of the Company or any Subsidiary in favor of governmental bodies
     to secure certain advance or progress payments pursuant to any contract or
     statute; and (vii) Liens to secure any extension, renewal, refinancing or
     refunding (or successive extensions, renewals, refinancings or refundings),
     in whole or in part, of any Debt secured by Liens referred to in the
     foregoing clauses (i) to (vi), so long as such Lien does not extend to any
     other property and the Debt so secured is not increased.

          (c) Notwithstanding the foregoing, the Company or any Subsidiary may
     incur Debt secured by Liens which otherwise would be subject to the
     foregoing restrictions, in an aggregate amount which, together with all
     other such Debt outstanding secured by Liens and all Attributable Debt
     outstanding in respect of Sale and Leaseback Transactions (other than as
     permitted by Section 3.6(a)), does not exceed 10% of Consolidated Net
     Tangible Assets.

          SECTION 3.6 Limitation on Sale and Leaseback Transactions. (a) The
     Company shall not, and shall not permit any Subsidiary to, enter into any
     Sale and Leaseback Transaction on any Principal Property (except for a
     period not exceeding three years) unless: (i) the Company or such
     Subsidiary would be entitled to incur a Lien to secure Debt by reason of
     the provisions described in clauses (i) through (vii) of Section 3.5(b) in
     an amount equal to the Attributable Debt of such Sale and Leaseback
     Transaction without equally and ratably securing all Outstanding Securities
     of each series having the benefit of this covenant or (ii) the Company or
     such Subsidiary applies within 180 days an amount equal to, in the case of
     a sale or transfer for cash, the net proceeds (not exceeding the net book
     value), and, otherwise, an amount equal to the fair value (as determined by
     its Board of Directors), of the property so leased to (A) the retirement of
     Securities or other Funded Debt of the Company or such Subsidiary or (B) to
     the acquisition of property which constitutes a Principal Property.

          (b) Notwithstanding the foregoing, the Company or any Subsidiary may
     enter into a Sale and Leaseback Transaction which would otherwise be
     subject to the foregoing restriction, provided the amount of Attributable
     Debt in respect of such Sale and Leaseback Transaction, together with all
     other such Attributable Debt outstanding and all Debt outstanding secured
     by Liens (other than as permitted by Section 3.5(b)), does not exceed 10%
     of Consolidated Net Tangible Assets.

          SECTION 3.7 Limitation on Subsidiary Funded Debt and Preferred Stock.
     The Company will not permit any Subsidiary of the Company having a
     Principal Property to incur or suffer to exist any Funded Debt or issue any
     Preferred Stock except: (i) Funded Debt outstanding under the Bank Credit
     Facility; (ii) Funded Debt or Preferred Stock outstanding on the date of
     original issuance of the Securities of a particular series; (iii) Funded
     Debt or Preferred Stock issued to and held by the Company or a Subsidiary
     of the Company; (iv) Funded Debt incurred or Preferred Stock issued by a
     Person prior to the time (A) such Person becomes a Subsidiary of the
     Company, (B) such Person merges into or consolidates with a Subsidiary of
     the Company or (C) another Subsidiary of the Company merges into or
     consolidates with such Person (in a transaction in which such Person
     becomes a Subsidiary of the Company); (v) Funded Debt or Preferred Stock
     incurred for the purpose of financing all or any part of the purchase price
     or the cost of construction of or improvements to the property of the
     Company or any of its Subsidiaries in an aggregate principal amount or
     liquidation preference, as the case may be, not to exceed the fair market
     value of such property, construction or improvements; and (vi) Funded Debt
     or Preferred Stock that is exchanged for, or the proceeds of which are used
     to refinance or refund, any Funded Debt or Preferred Stock permitted to be
     outstanding pursuant to clauses (i) through (v) (or any extension or
     renewal thereof) in an aggregate principal amount or liquidation
     preference, as the case may be (which, in the case of a Discount Security,
     shall be the issue price thereof), not to exceed the principal amount of
     the Funded Debt or the liquidation preference of the Preferred Stock, as
     the case may be, so exchanged, refinanced or refunded (which, in the case
     of a Discount Security, shall be the accreted value thereof).

          Notwithstanding the foregoing, the Company's Subsidiaries may incur
     Funded Debt and Preferred Stock in an aggregate principal amount and
     liquidation preference that does not exceed 10% of Consolidated Net
     Tangible Assets.

          SECTION 3.8 Waiver of Certain Covenants. The Company may omit in any
     particular instance to comply with any term, provision or condition set
     forth in Sections 3.5, 3.6 or 3.7 with respect to the Securities of any
     Series if before the time for such compliance the Holders of at least a
     majority in principal amount of the Outstanding Securities of such Series
     shall either waive such compliance in such instance or generally waive
     compliance with such term, provision or condition, but no such waiver shall
     extend to or affect such term, provision or condition except to the extent
     so expressly waived, and, until such waiver shall become effective, the
     obligations of the Company and the duties of the Trustee in respect of any
     such term, provision or condition shall remain in full force and effect.

     Section 2.4 AMENDMENT TO ARTICLE V. Article V of the Indenture is hereby
amended by deleting paragraphs (d) and (e) of Section 5.1 in their entirety.

     Section 2.5 AMENDMENT TO ARTICLE VII. Article VII of the Indenture is
hereby amended by adding the following Section 7.6:

          Section 7.6 Holders of Notes and Holders of Original Notes Vote as
     Single Class. Whenever any provision of this Indenture provides for the
     Holders of a Series of the Notes to vote and/or consent on any matter, the
     Holders of such Series will vote and/or consent on any and all such matters
     together with the holders of the corresponding Series of the Original Notes
     as one class, and neither the Holders nor the holders of the Original Notes
     corresponding to such Series will have the right to vote and/or consent as
     a separate class on any matter.

     Section 2.6. AMENDMENT TO SECTION 10.1(B). Section 10.1(b) of the Indenture
is hereby amended by deleting subparagraphs 10.1(b)(i), (ii) and (iii) in their
entirety and inserting instead the following new subparagraphs 10.1(b)(i),(ii),
(iii) and (iv):

          SECTION 10.1(b)(i) In addition to the provisions of Section 10.1, the
     Company may, at its option by or pursuant to, or otherwise in a manner or
     by such Persons as may be authorized pursuant to, one or more resolutions
     duly adopted by the Board of Directors, at any time with respect to the
     Securities of any Series, elect to have defeasance under subsection (ii) or
     covenant defeasance under subsection (iii) of this Section 10.1(b) be
     applied to the Outstanding Securities of such Series provided that
     provision therefor is made for such application pursuant to Section 2.3 and
     the applicable conditions thereto as set forth in this Section 10.1(b) have
     been satisfied.

          SECTION 10.1(b) (ii) Upon the Company's exercise of the option
     referenced in Section 10.1(b)(i) applicable to this subsection, the Company
     may terminate its obligations under the Outstanding Securities of any
     Series and hereunder with respect to such Series on the date the conditions
     set forth below are satisfied (hereinafter, "defeasance"). For this
     purpose, such defeasance means that the Company shall be deemed to have
     paid and discharged the entire indebtedness represented by the Outstanding
     Securities of such Series and to have satisfied all its other obligations
     under such Securities insofar as such Securities are concerned (and the
     Trustee, at the expense and request of the Company, shall execute proper
     instruments acknowledging the same), except for the following: (1) the
     rights of Holders of Outstanding Securities of such Series to receive
     payments in respect of the principal of and interest on such Securities
     when such payments are due, (2) the Company's obligations with respect to
     such Securities under Sections 2.8, 2.9, 2.11, 3.2, 6.7, 10.4 and 10.5 of
     the Indenture, (3) the rights, powers, trusts, duties and immunities of the
     Trustee hereunder, and (4) this Section 10.1(b).

          SECTION 10.1(b)(iii) Upon the Company's exercise of the option
     referenced in Section 10.1(b)(i) applicable to this subsection, the Company
     shall be released from its obligations under Sections 3.5, 3.6 and 3.7 with
     respect to the Outstanding Securities of such Series on and after the date
     the conditions set forth below are satisfied (hereinafter, the "covenant
     defeasance"). For this purpose, such covenant defeasance means that, with
     respect to the Outstanding Securities of such Series, the Company may omit
     to comply with and shall have no liability in respect of any term,
     condition or limitation set forth in any such Section, whether directly or
     indirectly by reason of any reference elsewhere herein to any such Section
     or by reason of any reference in any such Section to any other provision
     herein or in any other document (including, without limitation, the form of
     Securities of such Series), but the remainder of this Indenture and the
     rights of each Holder of such Securities shall be unaffected thereby.

          SECTION 10.1(b)(iv) The following shall be the conditions to the
     application of Section 10.1(b)(ii) or (iii) to the Outstanding Securities
     of such Series:

          (A) The Company shall have irrevocably deposited or caused to be
          deposited with the Trustee (or another trustee satisfying the
          requirements of Section 6.10 who shall agree to comply with the
          provisions of this Section 10.1(b) applicable to it) under the terms
          of an irrevocable trust agreement, as trust funds in trust solely for
          the purpose of making the following payments, specifically pledged as
          security for, and dedicated solely to, the benefit of the Holders of
          Securities of such Series, (i) cash in Dollars, or (ii) Government
          Obligations maturing as to principal and interest in such amounts and
          at such times as are sufficient, to pay the principal of and interest
          on the Outstanding Securities of such Series to Maturity or
          redemption, as the case may be, or (iii) a combination thereof, in
          each case sufficient, in the opinion of a nationally recognized firm
          of independent public accountants expressed in a written certification
          thereof delivered to the Trustee, to pay and discharge, and which
          shall be applied by the Trustee (or other qualifying trustee) to pay
          and discharge, (x) the principal of and each installment of principal
          of and interest, if any, on the Outstanding Securities of such Series
          on the Stated Maturity of such principal or installment of principal
          or interest, if any, and (y) any mandatory sinking fund payments or
          analogous payments applicable to the Outstanding Securities of such
          Series on the day on which such payments are due and payable in
          accordance with the terms of this Indenture and of such Securities.
          Such irrevocable trust agreement shall include, among other things,
          (i) provision for the payments referenced in clauses (x) and (y) of
          the immediately preceding sentence, (ii) the payment of the reasonable
          expenses of the Trustee incurred or to be incurred in connection with
          carrying out such trust provisions, (iii) rights of registration,
          transfer, substitution and exchange of Securities of such Series in
          accordance with the terms stated in this Indenture and (iv)
          continuation of the rights and obligations and immunities of the
          Trustee as against the Holders of Securities of such Series as stated
          in this Indenture.

          (B) No Event of Default or event which with notice or lapse of time or
          both would constitute an Event of Default with respect to the
          Securities of such Series shall have occurred and be continuing on the
          date of such deposit or shall occur as a result of such deposit or,
          insofar as Section 5.1(f) and 5.1(g) are concerned, at any time during
          the period ending on the 91st day after the date of such deposit (it
          being understood that this condition shall not be deemed satisfied
          until the expiration of such period).

          (C) Such deposit, defeasance or covenant defeasance shall not result
          in a breach or violation of, or constitute a default under, this
          Indenture or any other material agreement or instrument to which the
          Company is a party or by which it is bound.

          (D) The Company shall have delivered to the Trustee an Opinion of
          Counsel of recognized national standing to the effect that
          Securityholders of such Series will not recognize income, gain or loss
          for federal income tax purposes as a result of such deposit and
          discharge and will be subject to federal income tax on the same
          amounts and in the same manner and at the same time as would have been
          the case if such deposit and defeasance or covenant defeasance, as the
          case may be, had not occurred.

          (E) The Company shall have delivered to the Trustee an Officers'
          Certificate and Opinion of Counsel, each stating that all conditions
          precedent provided for herein relating to the deposit and defeasance
          or covenant defeasance, as the case may be, contemplated by this
          Section 10.1(b) have been complied with.

     Section 2.7 AMENDMENT TO SECTION 10.4. Section 10.4 of the Indenture is
hereby amended by deleting Section 10.4 in its entirety and inserting instead
the following new Section 10.4:

          SECTION 10.4 Return of Unclaimed Moneys Held by Trustee and Paying
     Agent. Any moneys deposited with or paid to the Trustee or any Paying Agent
     (including the Company acting as its own Paying Agent) for the payment of
     the principal of or interest on any Security of any Series and not applied
     but remaining unclaimed for two years after the date upon which such
     principal or interest shall have become due and payable, shall, upon the
     written request of the Company, and subject to applicable escheat laws,
     promptly be repaid to the Company by the Trustee for such Series or such
     Paying Agent (except that with respect to any amounts then held by the
     Company in trust as its own Paying Agent no such request need be given and
     at such time the Company shall be discharged from its request to hold such
     moneys in trust as Paying Agent), and the Holder of the Securities of such
     Series shall, unless otherwise required by mandatory provisions of
     applicable escheat or abandoned or unclaimed property laws, thereafter look
     only to the Company for any payment which such Holder may be entitled to
     collect, and all liability of the Trustee or any Paying Agent with respect
     to such moneys shall thereupon cease; provided, however, that the Trustee
     or such Paying Agent, before being required to make any such repayment with
     respect to moneys deposited with it for any payment in respect to
     Securities of any Series, shall at the expense and written request of the
     Company, mail by first-class mail to Holders of such Securities at their
     addresses as they shall appear on the Security Register, notice, that such
     moneys remain and that, after a date specified therein, which shall not be
     less than thirty days from the date of such mailing, any unclaimed balance
     of such money then remaining will be repaid to the Company. Anything in
     this Article X to the contrary notwithstanding, the Trustee shall deliver
     or pay to the Company from time to time upon the written request of the
     Company any money or Government Obligations held by it as provided in
     Section 10.1(b)(iv) which, in the opinion of a nationally recognized firm
     of independent public accountants expressed in a written certification
     thereof delivered to the Trustee, are in excess of the amount thereof which
     would then be required to be deposited to effect such defeasance or
     covenant defeasance, as the case may be, in accordance with the provisions
     of this Indenture.

     Section 2.8. RANKING. The Notes will be unsecured obligations of the
Company, ranking equally and PARI PASSU with all other unsecured and
unsubordinated debt of the Company.

     Section 2.9. TERMS OF THE NOTES. In accordance with Section 2.3 of the
Indenture, the Notes are subject to the terms set forth in this Supplemental
Indenture including, without limitation, Exhibits A, B and C hereto, the terms
of which are hereby incorporated in their entirety by reference. In addition to
the other terms of the Notes which are set forth elsewhere in this Supplemental
Indenture and Exhibits A, B and C hereto, the Notes are subject to all of the
provisions of the Indenture including, without limitation, the Company's
defeasance option and covenant defeasance option pursuant to Section 10.1 of the
Indenture, as supplemented by this Supplemental Indenture. For purposes of
Section 10.1 of the Indenture, as supplemented by this Supplemental Indenture,
the restrictive covenants referred to therein shall include the covenants set
forth in Article Two of this Supplemental Indenture. Each series of Notes shall
act as a separate Series with respect to all actions to be taken by, or matters
relating to, such Series.


                                  ARTICLE THREE

                             REDEMPTION OF THE NOTES

     Section 3.1. REDEMPTION. The Notes are not redeemable at any time prior to
their maturity.

     Section 3.2. NO SINKING FUND. The Notes are not entitled to the benefit of
any sinking fund.

                                  ARTICLE FOUR

                                  MISCELLANEOUS

     Section 4.1. DEFINED TERMS. Unless otherwise provided in this Supplemental
Indenture, all defined terms used in this Supplemental Indenture shall have the
meanings assigned to them in the Indenture.

     Section 4.2. CONFLICT OF ANY PROVISION OF INDENTURE WITH TRUST INDENTURE
ACT OF 1939. If and to the extent that any provision of this Supplemental
Indenture limits, qualifies or conflicts with another provision included in this
Supplemental Indenture or in the Indenture which is required to be included
herein or therein by any of Sections 310 to 317, inclusive, of the Trust
Indenture Act of 1939, as amended, such required provision shall control.

     Section 4.3. NEW YORK LAW TO GOVERN. THIS SUPPLEMENTAL INDENTURE AND THE
NOTES SHALL BE DEEMED TO BE CONTRACTS MADE AND TO BE PERFORMED ENTIRELY IN THE
STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF SAID STATE WITHOUT REGARD TO THE CONFLICTS OF LAW
RULES OF SAID STATE.

     Section 4.4. COUNTERPARTS. This Supplemental Indenture may be executed in
any number of counterparts, each of which shall be an original, but such
counterparts shall together constitute but one and the same instrument.

     Section 4.5. EFFECT OF HEADINGS. The Article and Section headings herein
are for convenience only and shall not affect the construction hereof.

     Section 4.6. SEVERABILITY OF PROVISIONS. In case any provision in this
Supplemental Indenture or in the Notes shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

     Section 4.7. SUCCESSORS AND ASSIGNS. All covenants and agreements in this
Supplemental Indenture by the parties hereto shall bind their respective
successors and assigns and inure to the benefit of their respective successors
and assigns, whether so expressed or not.

     Section 4.8. BENEFIT OF SUPPLEMENTAL INDENTURE. Nothing in this
Supplemental Indenture, express or implied, shall give to any Person, other than
the parties hereto, any Security Registrar, any Paying Agent and their
successors hereunder, and the Holders of the Notes, any benefit or any legal or
equitable right, remedy or claim under this Supplemental Indenture.


     Section 4.9. ACCEPTANCE BY TRUSTEE. The Trustee accepts the amendments to
the Indenture effected by this Supplemental Indenture and agrees to execute the
trusts created by the Indenture as hereby amended, but only upon the terms and
conditions set forth in the Indenture. Without limiting the generality of the
foregoing, the Trustee assumes no responsibility for the correctness of the
recitals contained herein, which shall be taken as the statements of the Company
and except as provided in the Indenture the Trustee shall not be responsible or
accountable in any way whatsoever for or with respect to the validity or
execution or sufficiency of this Supplemental Indenture and the Trustee makes no
representation with respect thereto.

     Section 4.10. RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURE CONTROLS;
SCOPE OF SUPPLEMENTAL INDENTURE.

     (a) The Indenture, as supplemented by this Supplemental Indenture, is in
all respects ratified and confirmed, and this Supplemental Indenture shall be
deemed part of the Indenture in the manner and to the extent herein and therein
provided. The provisions of this Supplemental Indenture shall, subject to
Section 4.2 hereof, supersede the provisions of the Indenture to the extent the
Indenture is inconsistent herewith.

     (b) The changes, modifications and supplements to the Indenture effected by
this Supplemental Indenture shall be applicable only with respect to, and govern
the terms of, the Notes, and shall not apply to any other Securities which may
be issued under the Indenture unless a supplemental indenture with respect to
such other Securities specifically incorporates such changes, modifications and
supplements.
<PAGE>
     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed, all as of the day and year first above written.

                                      TOSCO CORPORATION


                                      By:_______________________
                                         Name:
                                         Title:

                                      STATE STREET BANK
                                        AND TRUST COMPANY,
                                      as Trustee


                                      By:_______________________
                                         Name:
                                         Title:
<PAGE>
                                                                       EXHIBIT A

                             (FORM OF FACE OF NOTE)

     [Legend if Note is to be deposited for securities clearance and settlement
through the facilities of The Depository Trust Company.

     UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE ISSUED
IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON
IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO.,
HAS AN INTEREST HEREIN.]

No. ______________________                            CUSIP NO. ______________


                                TOSCO CORPORATION

                               7.25% NOTE DUE 2007

     TOSCO CORPORATION, a Nevada corporation (the "Company", which term includes
any successor corporation under the Indenture hereinafter referred to), for
value received, hereby promises to pay to __________ or registered assigns, at
the office or agency of the Company in New York, New York, the [principal sum of
____________Dollars](1) on January 1, 2007, in the coin or currency of the
United States, and to pay interest, semi-annually on January 1 and July 1 of
each year, commencing July 1, 1997, on said principal sum at said office or
agency, in like coin or currency, at the rate per annum specified in the title
of this Note, from the January 1 or the July 1, as the case may be, next
preceding the date of this Note to which interest has been paid, unless the date
hereof is a date to which interest has been paid, in which case from the date of
this Note, or unless no interest has been paid or duly provided for on the
corresponding Original Notes, in which case from January 1, 1997 until payment
of said principal sum has been made or duly provided for. Payments of such
principal and interest shall be made at the office or agency of the Company
maintained for such purpose, which, subject to the right of the Company to vary
or terminate the appointment of such agency, shall initially be at the principal
corporate trust office of State Street Bank and Trust Company in Boston,
Massachusetts; PROVIDED, that payment of interest may be made at the option of
the Company by check mailed to the address of the person entitled thereto as
such address shall appear on the Security Register or by wire transfer as
provided in the Indenture. Notwithstanding the foregoing, if the date hereof is
after December 15 or June 15, as the case may be, and before the following
January 1 or July 1, this Note shall bear interest from such January 1 or July
1; PROVIDED, that if the Company shall default in the payment of interest due on
such January 1 or July 1, then this Note shall bear interest from the next
preceding January 1 or July 1, to which interest has been paid or duly provided
for or, if no interest has been paid or duly provided for on the corresponding
Original Notes, from January 1, 1997. The interest so payable on any January 1
or July 1 will, subject to certain exceptions provided in the Indenture referred
to on the reverse hereof, be paid to the person in whose name this Note is
registered at the close of business on the December 15 or June 15, as the case
may be, next preceding such January 1 or July 1, whether or not such day is a
Business Day.

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

     This Note shall not be valid or become obligatory for any purpose until the
certificate of authentication hereon shall have been signed by or on behalf of
the Trustee under the Indenture referred to on the reverse hereof.

     IN WITNESS WHEREOF, TOSCO CORPORATION has caused this instrument to be
signed manually or by facsimile by its duly authorized officers and has caused a
facsimile of its corporate seal to be affixed hereunto or imprinted hereon.

Dated: __________, 1997

(SEAL)                                      TOSCO CORPORATION


                                            By________________________



Attest:


- ---------------------------
(1)  In the case of a Global Note the bracketed text will be replaced with
     the following:  "principal amount set forth on Schedule A hereto."
<PAGE>
                          CERTIFICATE OF AUTHENTICATION


     This is one of the Securities of the Series designated herein and referred
to in the within-mentioned Indenture.

Dated: _________, 1997              STATE STREET BANK AND TRUST
                                     COMPANY, as Trustee


                                     By:_________________________
                                         Authorized Signatory
<PAGE>
                                 REVERSE OF NOTE

                                TOSCO CORPORATION

                               7.25% Note due 2007

     This Note is one of a duly authorized issue of debentures, notes, bonds or
other evidences of indebtedness of the Company (hereinafter called the
"Securities") of the Series hereinafter specified, all issued or to be issued
under and pursuant to an indenture dated as of May 1, 1996, as supplemented by
the Supplemental Indenture dated as of May __, 1997 (herein called the
"Indenture"), duly executed and delivered by the Company to State Street Bank
and Trust Company, as Trustee (herein called the "Trustee", which term includes
any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a description of
the rights, limitations of rights, obligations, duties and immunities thereunder
of the Trustee, the Company and the Holders of the Securities and of the terms
upon which the Securities are, and are to be, authenticated and delivered. The
Securities may be issued in one or more series, which different series may be
issued in various aggregate principal amounts, may mature at different times,
may bear interest (if any) at different rates, may be subject to different
redemption provisions (if any), may be subject to different sinking, purchase or
analogous funds (if any) and may otherwise vary as provided in the Indenture.
This Note is one of a Series designated as the 7.25% Notes due 2007 of the
Company, limited in aggregate principal amount to $200,000,000.

     Interest will be computed on the basis of a 360-day year of twelve 30-day
months. The Company shall pay interest on overdue principal and, to the extent
lawful, on overdue installments of interest at the rate PER ANNUM borne by this
Note. If a payment date is not a Business Day as defined in the Indenture at a
place of payment, payment may be made at that place on the next succeeding day
that is a Business Day, and no interest shall accrue for the intervening period.

     In case an Event of Default with respect to the Notes due 2007, as defined
in the Indenture, shall have occurred and be continuing, the principal hereof
and the interest accrued hereon, if any, may be declared, and upon such
declaration shall become, due and payable, in the manner, with the effect and
subject to the conditions provided in the Indenture.

     The Indenture contains provisions permitting the Company and the Trustee,
with the consent of the Holders of a majority of the aggregate principal amount
of the Securities at the time Outstanding of all Series to be affected (treated
as one class), evidenced as provided in the Indenture, to execute supplemental
indentures adding any provisions to or changing in any manner or eliminating any
of the provisions of the Indenture or of any supplemental indenture or modifying
in any manner the rights of the Holders of the Securities of each such Series;
provided, however, that no such supplemental indenture shall (i) extend the
Stated Maturity of any Security, or reduce the principal amount thereof or any
premium thereon, or reduce the rate or extend the time of payment of interest
thereon, or reduce any amount payable upon redemption thereof, or impair or
affect the right of any Holder to institute suit for the payment thereof or, if
the Securities provide therefor, any right of repayment at the option of the
Securityholder, without the consent of the Holder of each Security so affected,
or (ii) reduce the aforesaid percentage of Securities of any Series, the Holders
of which are required to consent to any such supplemental indenture, without the
consent of the Holder of each Security affected. It is also provided in the
Indenture that, with respect to certain defaults or Events of Default regarding
the Securities of any Series, prior to any declaration accelerating the maturity
of such Securities, the Holders of a majority in aggregate principal amount
Outstanding of the Securities of such Series (or, in the case of certain
defaults or Events of Default, all or certain Series of the Securities), may on
behalf of the Holders of all the Securities of such Series (or all or certain
Series of the Securities), as the case may be, waive any such past default or
Event of Default and its consequences. The preceding sentence shall not,
however, apply to a default in the payment of the principal of or premium, if
any, or interest on any of the Securities. Any such consent or waiver by the
Holder of this Note (unless revoked as provided in the Indenture) shall be
conclusive and binding upon such Holder and upon all future Holders and owners
of this Note and any Note which may be issued in exchange or substitution
therefor, irrespective of whether or not any notation thereof is made upon this
Note or such other Note.

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

     It is also provided in the Indenture that, subject to certain conditions,
the Holders of at least a majority in principal amount of the outstanding
Securities of all Series affected (voting as a single class), by notice to the
Trustee, may waive an existing Default or Event of Default with respect to the
Securities of such Series and its consequences, except a Default in the payment
of principal of or interest on any Security or in respect of a covenant or
provision of the Indenture which cannot be modified or amended without the
consent of the Holder of each Outstanding Security affected. Upon any such
waiver, such Default shall cease to exist, and any Event of Default with respect
to the Securities of such Series arising therefrom shall be deemed to have been
cured, for every purpose of the Indenture; but no such waiver shall extend to
any subsequent or other Default or Event of Default or impair any right
consequent thereto.

     As provided in the Indenture, this Note is transferable by the registered
Holder hereof on the Security Register of the Company, upon surrender of this
Note for registration of transfer at the office or agency of the Trustee in the
City and State of New York accompanied by a written instrument or instruments of
transfer in form satisfactory to the Company or the Trustee duly executed by the
registered Holder hereof or his attorney duly authorized in writing, and
thereupon one or more new Notes of authorized denominations and for the same
aggregate principal amount and series will be issued to the designated
transferee or transferees. No service charge will be made for any such transfer,
but the Company may require payment of a sum sufficient to cover any tax or
other governmental charge payable in relation thereto.

     The Company, the Trustee and any agent of the Company or the Trustee may
deem and treat the registered Holder hereof as the absolute owner of this Note
(whether or not this Note shall be overdue and notwithstanding any notation of
ownership or other writing hereon), for the purpose of receiving payment of, or
on account of, the principal hereof and, subject to the provisions hereof,
interest hereon, and for all other purposes, and neither the Company nor the
Trustee nor any authorized agent of the Company or the Trustee shall be affected
by any notice to the contrary.

     No recourse under or upon any obligation, covenant or agreement of the
Company in the Indenture or any indenture supplemental thereto or in any Note,
or because of the creation of any indebtedness represented thereby, shall be had
against any incorporator, shareholder, officer or director, as such, past,
present, or future, of the Company or of any successor corporation, either
directly or through the Company or any successor corporation, under any rule of
law, statute or constitutional provision or by the enforcement of any assessment
or by any legal or equitable proceeding or otherwise, all such liability being
expressly waived and released by the acceptance hereof and as part of the
consideration for the issue hereof.

     The Indenture with respect to any Series will be discharged and canceled
except for certain Sections thereof, subject to the terms of the Indenture, upon
the payment of all the Securities of such Series or upon the irrevocable deposit
with the Trustee of cash or Government Obligations (or a combination thereof)
sufficient for such payment in accordance with Article X of the Indenture.

     The Notes of this Series are issuable only in registered form without
Coupons in denominations of $100,000 and any integral multiple of $1,000 in
excess thereof. As provided in the Indenture and subject to certain limitations
therein set forth, Notes of this Series are exchangeable for a like aggregate
principal amount of Notes of this Series of a different authorized denomination,
as requested by the Holder surrendering the same.

     This Indenture and this Note shall be deemed to be contracts made under the
laws of the State of New York, and for all purposes shall be governed by, and
construed in accordance with, the laws of such State.

     Terms used herein which are defined in the Indenture shall have the
respective meanings assigned thereto in the Indenture.

<PAGE>
                                   ASSIGNMENT

            [FORM OF ASSIGNMENT FOR NOTES THAT ARE NOT GLOBAL NOTES]

     For value received ______________ hereby sell(s), assign(s) and transfer(s)
unto

- ---------------------------------------------
(Please insert Social Security or other taxpayer
identification number of assignee.)

the within Note and hereby irrevocably constitutes and appoints
_________________ attorney to transfer the said Note on the books of the
Company, with full power of substitution in the premises.

Dated: ____________________


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


                           -----------------------------
                               Signature(s)

                           Signature(s) must be
                           guaranteed by a
                           commercial bank or
                           trust company or a
                           member firm of a major
                           stock exchange.


                           -------------------------
                           Signature Guarantee


NOTICE: The above signatures of the holder(s) hereof must correspond with the
name as written upon the face of this Note in every particular without
alteration or enlargement or any change whatever.
<PAGE>
          [FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL NOTE TO REFLECT
                          CHANGES IN PRINCIPAL AMOUNT]

                                   Schedule A

                   Changes to Principal Amount of Global Note

===============================================================================
                Principal Amount of
             Securities by which this          Remaining
             Global Security is to be          Principal
             Reduced or Increased, and       Amount of this
              Reason for Reduction or            Global            Notation
Date                 Increase                   Security            Made by
- -------------------------------------------------------------------------------

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

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

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

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

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

===============================================================================
<PAGE>
                                                                      EXHIBIT B

                           (FORM OF FACE OF DEBENTURE)

     [Legend if Debenture is to be deposited for securities clearance and
settlement through the facilities of The Depository Trust Company.

     UNLESS THIS DEBENTURE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY DEBENTURE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT
HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE &
CO., HAS AN INTEREST HEREIN.]

No. ______________________                           CUSIP NO. ______________


                                TOSCO CORPORATION

                            7.80% DEBENTURE DUE 2027

     TOSCO CORPORATION, a Nevada corporation (the "Company", which term includes
any successor corporation under the Indenture hereinafter referred to), for
value received, hereby promises to pay to ___________, or registered assigns, at
the office or agency of the Company in New York, New York, the [principal sum of
____________Dollars](1) on January 1, 2027, in the coin or currency of the
United States, and to pay interest, semi-annually on January 1 and July 1 of
each year, commencing July 1, 1997, on said principal sum at said office or
agency, in like coin or currency, at the rate per annum specified in the title
of this Debenture, from the January 1 or the July 1, as the case may be, next
preceding the date of this Debenture to which interest has been paid, unless the
date hereof is a date to which interest has been paid, in which case from the
date of this Debenture, or unless no interest has been paid or duly provided for
on the corresponding Original Notes, in which case from January 1, 1997 until
payment of said principal sum has been made or duly provided for. Payments of
such principal and interest shall be made at the office or agency of the Company
maintained for such purpose, which, subject to the right of the Company to vary
or terminate the appointment of such agency, shall initially be at the principal
corporate trust office of State Street Bank and Trust Company in Boston,
Massachusetts; PROVIDED, that payment of interest may be made at the option of
the Company by check mailed to the address of the person entitled thereto as
such address shall appear on the Security Register or by wire transfer as
provided in the Indenture. Notwithstanding the foregoing, if the date hereof is
after December 15 or June 15, as the case may be, and before the following
January 1 or July 1, this Debenture shall bear interest from such January 1 or
July 1; PROVIDED, that if the Company shall default in the payment of interest
due on such January 1 or July 1, then this Debenture shall bear interest from
the next preceding January 1 or July 1, to which interest has been paid or duly
provided for or, if no interest has been paid or duly provided for on the
corresponding Original Notes, from January 1, 1997. The interest so payable on
any January 1 or July 1 will, subject to certain exceptions provided in the
Indenture referred to on the reverse hereof, be paid to the person in whose name
this Debenture is registered at the close of business on the December 15 or June
15, as the case may be, next preceding such January 1 or July 1, whether or not
such day is a Business Day.

     Reference is made to the further provisions of this Debenture set forth on
the reverse hereof. Such further provisions shall for all purposes have the same
effect as through fully set forth at this place.

     This Debenture shall not be valid or become obligatory for any purpose
until the certificate of authentication hereon shall have been signed by or on
behalf of the Trustee under the Indenture referred to on the reverse hereof.

     IN WITNESS WHEREOF, TOSCO CORPORATION has caused this instrument to be
signed manually or by facsimile by its duly authorized officers and has caused a
facsimile of its corporate seal to be affixed hereunto or imprinted hereon.

Dated: __________, 1997

(SEAL)                                      TOSCO CORPORATION


                                            By________________________



Attest:


- ---------------------------
(1)  In the case of a Global Debenture the bracketed text will be replaced with
     the following:  "principal amount set forth on Schedule A hereto."

<PAGE>
                          CERTIFICATE OF AUTHENTICATION


     This is one of the Securities of the Series designated herein and referred
to in the within-mentioned Indenture.

Dated: _______, 1997                      STATE STREET BANK AND TRUST
                                           COMPANY, as Trustee


                                           By:_________________________
                                               Authorized Signatory

<PAGE>
                              REVERSE OF DEBENTURE

                                TOSCO CORPORATION

                            7.80% Debenture due 2027

     This Debenture is one of a duly authorized issue of debentures, notes,
bonds or other evidences of indebtedness of the Company (hereinafter called the
"Securities") of the Series hereinafter specified, all issued or to be issued
under and pursuant to an indenture dated as of May 1, 1996, as supplemented by
the Supplemental Indenture dated as of May __, 1997 (herein called the
"Indenture"), duly executed and delivered by the Company to State Street Bank
and Trust Company, as Trustee (herein called the "Trustee", which term includes
any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a description of
the rights, limitations of rights, obligations, duties and immunities thereunder
of the Trustee, the Company and the Holders of the Securities and of the terms
upon which the Securities are, and are to be, authenticated and delivered. The
Securities may be issued in one or more series, which different series may be
issued in various aggregate principal amounts, may mature at different times,
may bear interest (if any) at different rates, may be subject to different
redemption provisions (if any), may be subject to different sinking, purchase or
analogous funds (if any) and may otherwise vary as provided in the Indenture.
This Debenture is one of a Series designated as the 7.80% Debentures due 2027 of
the Company, limited in aggregate principal amount to $300,000,000.

     Interest will be computed on the basis of a 360-day year of twelve 30-day
months. The Company shall pay interest on overdue principal and, to the extent
lawful, on overdue installments of interest at the rate PER ANNUM borne by this
Debenture. If a payment date is not a Business Day as defined in the Indenture
at a place of payment, payment may be made at that place on the next succeeding
day that is a Business Day, and no interest shall accrue for the intervening
period.

     In case an Event of Default with respect to the Debentures due 2027, as
defined in the Indenture, shall have occurred and be continuing, the principal
hereof and the interest accrued hereon, if any, may be declared, and upon such
declaration shall become, due and payable, in the manner, with the effect and
subject to the conditions provided in the Indenture.

     The Indenture contains provisions permitting the Company and the Trustee,
with the consent of the Holders of a majority of the aggregate principal amount
of the Securities at the time Outstanding of all Series to be affected (treated
as one class), evidenced as provided in the Indenture, to execute supplemental
indentures adding any provisions to or changing in any manner or eliminating any
of the provisions of the Indenture or of any supplemental indenture or modifying
in any manner the rights of the Holders of the Securities of each such Series;
provided, however, that no such supplemental indenture shall (i) extend the
Stated Maturity of any Security, or reduce the principal amount thereof or any
premium thereon, or reduce the rate or extend the time of payment of interest
thereon, or reduce any amount payable upon redemption thereof, or impair or
affect the right of any Holder to institute suit for the payment thereof or, if
the Securities provide therefor, any right of repayment at the option of the
Securityholder, without the consent of the Holder of each Security so affected,
or (ii) reduce the aforesaid percentage of Securities of any Series, the Holders
of which are required to consent to any such supplemental indenture, without the
consent of the Holder of each Security affected. It is also provided in the
Indenture that, with respect to certain defaults or Events of Default regarding
the Securities of any Series, prior to any declaration accelerating the maturity
of such Securities, the Holders of a majority in aggregate principal amount
Outstanding of the Securities of such Series (or, in the case of certain
defaults or Events of Default, all or certain Series of the Securities), may on
behalf of the Holders of all the Securities of such Series (or all or certain
Series of the Securities), as the case may be, waive any such past default or
Event of Default and its consequences. The preceding sentence shall not,
however, apply to a default in the payment of the principal of or premium, if
any, or interest on any of the Securities. Any such consent or waiver by the
Holder of this Debenture (unless revoked as provided in the Indenture) shall be
conclusive and binding upon such Holder and upon all future Holders and owners
of this Debenture and any Debenture which may be issued in exchange or
substitution therefor, irrespective of whether or not any notation thereof is
made upon this Debenture or such other Debenture.

     No reference herein to the Indenture, and no provision of this Debenture or
of the Indenture, shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of (and premium, if any) and
interest on this Debenture in the manner, at the respective times, at the rate,
and in the coin or currency herein prescribed.

     It is also provided in the Indenture that, subject to certain conditions,
the Holders of at least a majority in principal amount of the outstanding
Securities of all Series affected (voting as a single class), by notice to the
Trustee, may waive an existing Default or Event of Default with respect to the
Securities of such Series and its consequences, except a Default in the payment
of principal of or interest on any Security or in respect of a covenant or
provision of the Indenture which cannot be modified or amended without the
consent of the Holder of each Outstanding Security affected. Upon any such
waiver, such Default shall cease to exist, and any Event of Default with respect
to the Securities of such Series arising therefrom shall be deemed to have been
cured, for every purpose of the Indenture; but no such waiver shall extend to
any subsequent or other Default or Event of Default or impair any right
consequent thereto.

     As provided in the Indenture, this Debenture is transferable by the
registered Holder hereof on the Security Register of the Company, upon surrender
of this Debenture for registration of transfer at the office or agency of the
Trustee in the City and State of New York accompanied by a written instrument or
instruments of transfer in form satisfactory to the Company or the Trustee duly
executed by the registered Holder hereof or his attorney duly authorized in
writing, and thereupon one or more new Debentures of authorized denominations
and for the same aggregate principal amount and series will be issued to the
designated transferee or transferees. No service charge will be made for any
such transfer, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in relation thereto.

     The Company, the Trustee and any agent of the Company or the Trustee may
deem and treat the registered Holder hereof as the absolute owner of this
Debenture (whether or not this Debenture shall be overdue and notwithstanding
any notation of ownership or other writing hereon), for the purpose of receiving
payment of, or on account of, the principal hereof and, subject to the
provisions hereof, interest hereon, and for all other purposes, and neither the
Company nor the Trustee nor any authorized agent of the Company or the Trustee
shall be affected by any notice to the contrary.

     No recourse under or upon any obligation, covenant or agreement of the
Company in the Indenture or any indenture supplemental thereto or in any
Debenture, or because of the creation of any indebtedness represented thereby,
shall be had against any incorporator, shareholder, officer or director, as
such, past, present, or future, of the Company or of any successor corporation,
either directly or through the Company or any successor corporation, under any
rule of law, statute or constitutional provision or by the enforcement of any
assessment or by any legal or equitable proceeding or otherwise, all such
liability being expressly waived and released by the acceptance hereof and as
part of the consideration for the issue hereof.

     The Indenture with respect to any Series will be discharged and canceled
except for certain Sections thereof, subject to the terms of the Indenture, upon
the payment of all the Securities of such Series or upon the irrevocable deposit
with the Trustee of cash or Government Obligations (or a combination thereof)
sufficient for such payment in accordance with Article X of the Indenture.

     The Debentures of this Series are issuable only in registered form without
Coupons in denominations of $100,000 and any integral multiple of $1,000 in
excess thereof. As provided in the Indenture and subject to certain limitations
therein set forth, Debentures of this Series are exchangeable for a like
aggregate principal amount of Debentures of this Series of a different
authorized denomination, as requested by the Holder surrendering the same.

     This Indenture and this Debenture shall be deemed to be contracts made
under the laws of the State of New York, and for all purposes shall be governed
by, and construed in accordance with, the laws of such State.

     Terms used herein which are defined in the Indenture shall have the
respective meanings assigned thereto in the Indenture.
<PAGE>
                                   ASSIGNMENT

             [FORM OF ASSIGNMENT FOR DEBENTURES THAT ARE NOT GLOBAL
                                   DEBENTURES]

     For value received ______________ hereby sell(s), assign(s) and transfer(s)
unto

- ---------------------------------------------
(Please insert Social Security or other
taxpayer identification number of assignee.)

the within Debenture and hereby irrevocably constitutes and appoints
_________________ attorney to transfer the said Debenture on the books of the
Company, with full power of substitution in the premises.

                           Dated: ____________________


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


                           -----------------------------
                                   Signature(s)

                           Signature(s) must be
                           guaranteed by a
                           commercial bank or
                           trust company or a
                           member firm of a major
                           stock exchange.


                           -------------------------
                           Signature Guarantee


NOTICE: The above signatures of the holder(s) hereof must correspond with the
name as written upon the face of this Debenture in every particular without
alteration or enlargement or any change whatever.
<PAGE>
            [FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL DEBENTURE TO
                      REFLECT CHANGES IN PRINCIPAL AMOUNT]

                                   Schedule A

                 Changes to Principal Amount of Global Debenture

================================================================================
              Principal Amount of
           Securities by which this             Remaining
           Global Security is to be             Principal
           Reduced or Increased, and          Amount of this
            Reason for Reduction or               Global          Notation
Date               Increase                      Security          Made by
- --------------------------------------------------------------------------------

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

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

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

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

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

===============================================================================
<PAGE>
                                                                      EXHIBIT C

                           (FORM OF FACE OF DEBENTURE)

     [Legend if Debenture is to be deposited for securities clearance and
settlement through the facilities of The Depository Trust Company.

     UNLESS THIS DEBENTURE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY DEBENTURE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT
HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE &
CO., HAS AN INTEREST HEREIN.]

No. ______________________                            CUSIP NO. ______________


                                TOSCO CORPORATION

                            7.90% DEBENTURE DUE 2047

     TOSCO CORPORATION, a Nevada corporation (the "Company", which term includes
any successor corporation under the Indenture hereinafter referred to), for
value received, hereby promises to pay to ___________, or registered assigns, at
the office or agency of the Company in New York, New York, the [principal sum of
____________Dollars](1) on January 1, 2047, in the coin or currency of the
United States, and to pay interest, semi-annually on January 1 and July 1 of
each year, commencing July 1, 1997, on said principal sum at said office or
agency, in like coin or currency, at the rate per annum specified in the title
of this Debenture, from the January 1 or the July 1, as the case may be, next
preceding the date of this Debenture to which interest has been paid, unless the
date hereof is a date to which interest has been paid, in which case from the
date of this Debenture, or unless no interest has been paid or duly provided for
on the corresponding Original Notes, in which case from January 1, 1997 until
payment of said principal sum has been made or duly provided for. Payments of
such principal and interest shall be made at the office or agency of the Company
maintained for such purpose, which, subject to the right of the Company to vary
or terminate the appointment of such agency, shall initially be at the principal
corporate trust office of State Street Bank and Trust Company in Boston,
Massachusetts; PROVIDED, that payment of interest may be made at the option of
the Company by check mailed to the address of the person entitled thereto as
such address shall appear on the Security Register or by wire transfer as
provided in the Indenture. Notwithstanding the foregoing, if the date hereof is
after December 15 or June 15, as the case may be, and before the following
January 1 or July 1, this Debenture shall bear interest from such January 1 or
July 1; PROVIDED, that if the Company shall default in the payment of interest
due on such January 1 or July 1, then this Debenture shall bear interest from
the next preceding January 1 or July 1, to which interest has been paid or duly
provided for or, if no interest has been paid or duly provided for on the
corresponding Original Notes, from January 1, 1997. The interest so payable on
any January 1 or July 1 will, subject to certain exceptions provided in the
Indenture referred to on the reverse hereof, be paid to the person in whose name
this Debenture is registered at the close of business on the December 15 or June
15, as the case may be, next preceding such January 1 or July 1, whether or not
such day is a Business Day.

     Reference is made to the further provisions of this Debenture set forth on
the reverse hereof. Such further provisions shall for all purposes have the same
effect as through fully set forth at this place.

     This Debenture shall not be valid or become obligatory for any purpose
until the certificate of authentication hereon shall have been signed by or on
behalf of the Trustee under the Indenture referred to on the reverse hereof.

     IN WITNESS WHEREOF, TOSCO CORPORATION has caused this instrument to be
signed manually or by facsimile by its duly authorized officers and has caused a
facsimile of its corporate seal to be affixed hereunto or imprinted hereon.

Dated: ___________, 1997

(SEAL)                                TOSCO CORPORATION


                                      By________________________



Attest:


- ---------------------------
(1)  In the case of a Global Debenture the bracketed text will be replaced with
     the following:  "principal amount set forth on Schedule A hereto."

<PAGE>
                          CERTIFICATE OF AUTHENTICATION


     This is one of the Securities of the Series designated herein and referred
to in the within-mentioned Indenture.

Dated: _________, 1997                     STATE STREET BANK AND TRUST
                                            COMPANY, as Trustee


                                            By:_________________________
                                                Authorized Signatory
<PAGE>
                              REVERSE OF DEBENTURE

                                TOSCO CORPORATION

                            7.90% Debenture due 2047

     This Debenture is one of a duly authorized issue of debentures, notes,
bonds or other evidences of indebtedness of the Company (hereinafter called the
"Securities") of the Series hereinafter specified, all issued or to be issued
under and pursuant to an indenture dated as of May 1, 1996, as supplemented by
the Supplemental Indenture dated as of May __, 1997 (herein called the
"Indenture"), duly executed and delivered by the Company to State Street Bank
and Trust Company, as Trustee (herein called the "Trustee", which term includes
any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a description of
the rights, limitations of rights, obligations, duties and immunities thereunder
of the Trustee, the Company and the Holders of the Securities and of the terms
upon which the Securities are, and are to be, authenticated and delivered. The
Securities may be issued in one or more series, which different series may be
issued in various aggregate principal amounts, may mature at different times,
may bear interest (if any) at different rates, may be subject to different
redemption provisions (if any), may be subject to different sinking, purchase or
analogous funds (if any) and may otherwise vary as provided in the Indenture.
This Debenture is one of a Series designated as the 7.90% Debentures due 2047 of
the Company, limited in aggregate principal amount to $100,000,000.

     Interest will be computed on the basis of a 360-day year of twelve 30-day
months. The Company shall pay interest on overdue principal and, to the extent
lawful, on overdue installments of interest at the rate PER ANNUM borne by this
Debenture. If a payment date is not a Business Day as defined in the Indenture
at a place of payment, payment may be made at that place on the next succeeding
day that is a Business Day, and no interest shall accrue for the intervening
period.

     In case an Event of Default with respect to the Debentures due 2047, as
defined in the Indenture, shall have occurred and be continuing, the principal
hereof and the interest accrued hereon, if any, may be declared, and upon such
declaration shall become, due and payable, in the manner, with the effect and
subject to the conditions provided in the Indenture.

     The Indenture contains provisions permitting the Company and the Trustee,
with the consent of the Holders of a majority of the aggregate principal amount
of the Securities at the time Outstanding of all Series to be affected (treated
as one class), evidenced as provided in the Indenture, to execute supplemental
indentures adding any provisions to or changing in any manner or eliminating any
of the provisions of the Indenture or of any supplemental indenture or modifying
in any manner the rights of the Holders of the Securities of each such Series;
provided, however, that no such supplemental indenture shall (i) extend the
Stated Maturity of any Security, or reduce the principal amount thereof or any
premium thereon, or reduce the rate or extend the time of payment of interest
thereon, or reduce any amount payable upon redemption thereof, or impair or
affect the right of any Holder to institute suit for the payment thereof or, if
the Securities provide therefor, any right of repayment at the option of the
Securityholder, without the consent of the Holder of each Security so affected,
or (ii) reduce the aforesaid percentage of Securities of any Series, the Holders
of which are required to consent to any such supplemental indenture, without the
consent of the Holder of each Security affected. It is also provided in the
Indenture that, with respect to certain defaults or Events of Default regarding
the Securities of any Series, prior to any declaration accelerating the maturity
of such Securities, the Holders of a majority in aggregate principal amount
Outstanding of the Securities of such Series (or, in the case of certain
defaults or Events of Default, all or certain Series of the Securities), may on
behalf of the Holders of all the Securities of such Series (or all or certain
Series of the Securities), as the case may be, waive any such past default or
Event of Default and its consequences. The preceding sentence shall not,
however, apply to a default in the payment of the principal of or premium, if
any, or interest on any of the Securities. Any such consent or waiver by the
Holder of this Debenture (unless revoked as provided in the Indenture) shall be
conclusive and binding upon such Holder and upon all future Holders and owners
of this Debenture and any Debenture which may be issued in exchange or
substitution therefor, irrespective of whether or not any notation thereof is
made upon this Debenture or such other Debenture.

     No reference herein to the Indenture, and no provision of this Debenture or
of the Indenture, shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of (and premium, if any) and
interest on this Debenture in the manner, at the respective times, at the rate,
and in the coin or currency herein prescribed.

     It is also provided in the Indenture that, subject to certain conditions,
the Holders of at least a majority in principal amount of the outstanding
Securities of all Series affected (voting as a single class), by notice to the
Trustee, may waive an existing Default or Event of Default with respect to the
Securities of such Series and its consequences, except a Default in the payment
of principal of or interest on any Security or in respect of a covenant or
provision of the Indenture which cannot be modified or amended without the
consent of the Holder of each Outstanding Security affected. Upon any such
waiver, such Default shall cease to exist, and any Event of Default with respect
to the Securities of such Series arising therefrom shall be deemed to have been
cured, for every purpose of the Indenture; but no such waiver shall extend to
any subsequent or other Default or Event of Default or impair any right
consequent thereto.

     As provided in the Indenture, this Debenture is transferable by the
registered Holder hereof on the Security Register of the Company, upon surrender
of this Debenture for registration of transfer at the office or agency of the
Trustee in the City and State of New York accompanied by a written instrument or
instruments of transfer in form satisfactory to the Company or the Trustee duly
executed by the registered Holder hereof or his attorney duly authorized in
writing, and thereupon one or more new Debentures of authorized denominations
and for the same aggregate principal amount and series will be issued to the
designated transferee or transferees. No service charge will be made for any
such transfer, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in relation thereto.

     The Company, the Trustee and any agent of the Company or the Trustee may
deem and treat the registered Holder hereof as the absolute owner of this
Debenture (whether or not this Debenture shall be overdue and notwithstanding
any notation of ownership or other writing hereon), for the purpose of receiving
payment of, or on account of, the principal hereof and, subject to the
provisions hereof, interest hereon, and for all other purposes, and neither the
Company nor the Trustee nor any authorized agent of the Company or the Trustee
shall be affected by any notice to the contrary.

     No recourse under or upon any obligation, covenant or agreement of the
Company in the Indenture or any indenture supplemental thereto or in any
Debenture, or because of the creation of any indebtedness represented thereby,
shall be had against any incorporator, shareholder, officer or director, as
such, past, present, or future, of the Company or of any successor corporation,
either directly or through the Company or any successor corporation, under any
rule of law, statute or constitutional provision or by the enforcement of any
assessment or by any legal or equitable proceeding or otherwise, all such
liability being expressly waived and released by the acceptance hereof and as
part of the consideration for the issue hereof.

     The Indenture with respect to any Series will be discharged and canceled
except for certain Sections thereof, subject to the terms of the Indenture, upon
the payment of all the Securities of such Series or upon the irrevocable deposit
with the Trustee of cash or Government Obligations (or a combination thereof)
sufficient for such payment in accordance with Article X of the Indenture.

     The Debentures of this Series are issuable only in registered form without
Coupons in denominations of $100,000 and any integral multiple of $1,000 in
excess thereof. As provided in the Indenture and subject to certain limitations
therein set forth, Debentures of this Series are exchangeable for a like
aggregate principal amount of Debentures of this Series of a different
authorized denomination, as requested by the Holder surrendering the same.

     This Indenture and this Debenture shall be deemed to be contracts made
under the laws of the State of New York, and for all purposes shall be governed
by, and construed in accordance with, the laws of such State.

     Terms used herein which are defined in the Indenture shall have the
respective meanings assigned thereto in the Indenture.
<PAGE>
                                   ASSIGNMENT

             [FORM OF ASSIGNMENT FOR DEBENTURES THAT ARE NOT GLOBAL
                                   DEBENTURES]

     For value received ______________ hereby sell(s), assign(s) and transfer(s)
unto

- ---------------------------------------------
(Please insert Social Security or other
taxpayer identification number of
assignee.)

the within Debenture and hereby irrevocably constitutes and appoints
_________________ attorney to transfer the said Debenture on the books of the
Company, with full power of substitution in the premises.

                           Dated: ____________________


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


                           -----------------------------
                                    Signature(s)

                           Signature(s) must be
                           guaranteed by a
                           commercial bank or
                           trust company or a
                           member firm of a major
                           stock exchange.


                           -------------------------
                           Signature Guarantee


NOTICE: The above signatures of the holder(s) hereof must correspond with the
name as written upon the face of this Debenture in every particular without
alteration or enlargement or any change whatever.
<PAGE>
            [FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL DEBENTURE TO
                      REFLECT CHANGES IN PRINCIPAL AMOUNT]

                                   Schedule A

                 Changes to Principal Amount of Global Debenture

===============================================================================
              Principal Amount of
           Securities by which this        Remaining
           Global Security is to be        Principal
           Reduced or Increased, and     Amount of this
            Reason for Reduction or          Global            Notation
Date               Increase                 Security            Made by
- -------------------------------------------------------------------------------

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

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

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

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

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

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

                                                                  EXHIBIT 5
                                                                  212-806-5400

May 21, 1997


Tosco Corporation
72 Cummings Point Road
Stamford, CT 06902

Ladies and Gentlemen:

We have acted as counsel to Tosco Corporation, a Nevada corporation (the
"Company") in connection with the preparation and filing of a Registration
Statement on Form S-4 (the "Registration Statement") relating to the issuance by
the Company of up to $200,000,000 in aggregate principal amount of 7.25% Notes
due 2007, $300,000,000 in aggregate principal amount of 7.80% Debentures due
2027 and $100,000,000 in aggregate principal amount of 7.90% Debentures due 2047
(collectively, the "Notes").

We have examined copies of the Restated Articles of Incorporation and Bylaws of
the Company, the Registration Statement and all exhibits thereto, and such other
corporate records, documents, statutes and authorities, and have made such
examinations of law, as we have deemed necessary to form the basis for the
opinion hereinafter expressed. In our examination of such material, we have
assumed the genuineness of all signatures, the authenticity of all documents
submitted to us as originals and the conformity to original documents of all
copies submitted to us. As to various questions of fact material to such
opinion, we have relied upon statements and certificates of officers and
representatives of the Company and others.

We are members of the bar of the State of New York and do not purport to be
experts on the laws of any other state or jurisdiction relevant to this opinion.

Based upon the foregoing, we are of the opinion that when (i) the applicable
provisions of the Securities Act of 1933, as amended, and such "Blue Sky" or
other securities laws as may be applicable shall have been complied with and
(ii) the Supplemental Indenture, to be entered into between the Company and
State Street Bank and Trust Company, as Trustee (the "Indenture"), pursuant to
which the Notes are to be issued, shall have been qualified under the Trust
Indenture Act of 1939, as amended, and shall have been duly executed and
delivered by the parties thereto, the Notes, when executed, authenticated and
exchanged in accordance with the Indenture and as described in the Prospectus
forming a part of the Registration Statement, will be legally issued and binding
obligations of the Company.

The foregoing opinion is subject to the effect of bankruptcy, insolvency,
reorganization, moratorium, fraudulent conveyance and other similar laws
relating to or affecting creditors' rights generally and court decisions with
respect thereto and we express no opinion with respect to the availability of
equitable remedies.

We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement, to the reference to this firm under the caption "Legal
Matters" in the Prospectus forming a part of the Registration Statement and to
the filing of this opinion as an exhibit to any application made by or on behalf
of the Company or any dealer in connection with the registration of the Notes
under the securities or blue sky laws of any state or jurisdiction. In giving
such permission, we do not admit hereby that we come within the category of
persons whose consent is required under Section 7 of the Securities Act of 1933,
as amended, or the Rules and Regulations of the Securities and Exchange
Commission thereunder.

Very truly yours,

/s/ STROOCK & STROOCK & LAVAN LLP

STROOCK & STROOCK & LAVAN LLP


                                                                EXHIBIT 12 

                       TOSCO CORPORATION AND SUBSIDIARIES
                       RATIO OF EARNINGS TO FIXED CHARGES
                   (Thousands of Dollars, Except Ratio Data)
                                   (Unaudited)

                                                   Three Months Ended March 31,
                                                   ---------------------------- 
                                                      1997            1996    
                                                    -----------     -----------
Income before income taxes                           $ 6,193         $ 39,618

Fixed charges to be added to income before income taxes:
  Interest expense, including amortization of         
   debt expenses                                      24,143           16,723
  Dividends on company-obligated, mandatorily
   redeemable, convertible preferred securities        4,312
  Interest factor of rental expense                    7,175            4,718
                                                    ----------       ----------
Income as adjusted                                   $41,823         $ 61,059
                                                    ----------       ----------
Fixed charges:                                       
  Interest expense, including amortization of 
    debt expenses                                    $24,143         $ 16,723
  Interest capitalized                                   249              340
  Dividends on company-obligated, mandatorily
    redeemable, convertible preferred securities       4,312
  Interest factor of rental expense                    7,175            4,718
                                                     ----------      ----------
Total fixed charges                                  $35,879          $21,781

Ratio of earnings to fixed charges                      1.17             2.80
                                                     ==========      ==========

                                                                    EXHIBIT 23.2

                       CONSENT OF INDEPENDENT ACCOUNTANTS

We consent to the incorporation by reference in this registration statement of
Tosco Corporation on Form S-4 (File No. 333-__________) of our report dated
February 28, 1997, on our audits of the consolidated financial statements and
financial statement schedule of Tosco Corporation and subsidiaries as of
December 31, 1996 and 1995, and for the years ended December 31, 1996, 1995 and
1994.  We also consent to the reference to our firm under the caption
"Experts."

/s/ Coopers & Lybrand L.L.P.

San Francisco, California
May 19, 1997

<PAGE>
                                                                     EXHIBIT 25
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM T-1
                                    ---------

                       STATEMENT OF ELIGIBILITY UNDER THE
                        TRUST INDENTURE ACT OF 1939 OF A
                    CORPORATION DESIGNATED TO ACT AS TRUSTEE

                Check if an Application to Determine Eligibility
                  of a Trustee Pursuant to Section 305(b)(2) __


                       STATE STREET BANK AND TRUST COMPANY
               (Exact name of trustee as specified in its charter)

       Massachusetts                                          04-1867445
  (Jurisdiction of                                         (I.R.S. Employer
   incorporation or                                       Identification No.)
 organization if not a U.S.
     national bank)


          225 Franklin Street, Boston, Massachusetts        02110
         (Address of principal executive offices)         (Zip Code)

       John R. Towers, Esq. Senior Vice President and Corporate Secretary
                225 Franklin Street, Boston, Massachusetts 02110
                                 (617) 654-3253
            (Name, address and telephone number of agent for service)

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

                                TOSCO CORPORATION
               (Exact name of obligor as specified in its charter)

     MASSACHUSETTS                                        (95-1865716)
(State or other jurisdiction of                         (I.R.S. Employer
incorporation or organization)                         Identification No.)


                             72 CUMMINGS POINT ROAD
                           STAMFORD, CONNECTICUT 06902
               (Address of principal executive offices) (Zip Code)



                        $200,000,000 7.25% NOTES DUE 2007
                     $300,000,000 7.80% DEBENTURES DUE 2027
                     $100,000,000 7.90% DEBENTURES DUE 2047
                         (Title of indenture securities)
<PAGE>
                                     GENERAL

ITEM 1.  GENERAL INFORMATION.

         FURNISH THE FOLLOWING INFORMATION AS TO THE TRUSTEE:

         (A)  NAME AND ADDRESS OF EACH EXAMINING OR SUPERVISORY
AUTHORITY TO WHICH IT IS SUBJECT.

          Department of Banking and Insurance of The Commonwealth of
          Massachusetts, 100 Cambridge Street, Boston, Massachusetts.

          Board of Governors of the Federal Reserve System, Washington, D.C.,
          Federal Deposit Insurance Corporation, Washington, D.C.

         (B)  WHETHER IT IS AUTHORIZED TO EXERCISE CORPORATE
TRUST POWERS.

          Trustee is authorized to exercise corporate trust powers.

ITEM 2.   AFFILIATIONS WITH OBLIGOR.

          IF THE OBLIGOR IS AN AFFILIATE OF THE TRUSTEE, DESCRIBE EACH SUCH
          AFFILIATION.

          The obligor is not an affiliate of the trustee or of its parent, State
          Street Boston Corporation.

          (See note on page 2.)

ITEM 3. THROUGH ITEM 15.  NOT APPLICABLE.

ITEM 16.   LIST OF EXHIBITS.

          LIST BELOW ALL EXHIBITS FILED AS PART OF THIS STATEMENT OF
          ELIGIBILITY.

         1.   A COPY OF THE ARTICLES OF ASSOCIATION OF THE
TRUSTEE AS NOW IN EFFECT.

          A copy of the Articles of Association of the trustee, as now in
          effect, is on file with the Securities and Exchange Commission as
          Exhibit 1 to Amendment No. 1 to the Statement of Eligibility and
          Qualification of Trustee (Form T-1) filed with the Registration
          Statement of Morse Shoe, Inc. (File No. 22-17940) and is incorporated
          herein by reference thereto.

         2.   A COPY OF THE CERTIFICATE OF AUTHORITY OF THE
TRUSTEE TO COMMENCE BUSINESS, IF NOT CONTAINED IN THE
ARTICLES OF ASSOCIATION.

          A copy of a Statement from the Commissioner of Banks of Massachusetts
          that no certificate of authority for the trustee to commence business
          was necessary or issued is on file with the Securities and Exchange
          Commission as Exhibit 2 to Amendment No. 1 to the Statement of
          Eligibility and Qualification of Trustee (Form T-1) filed with the
          Registration Statement of Morse Shoe, Inc. (File No. 22-17940) and is
          incorporated herein by reference thereto.

          3. A COPY OF THE AUTHORIZATION OF THE TRUSTEE TO EXERCISE CORPORATE
TRUST POWERS, IF SUCH AUTHORIZATION IS NOT CONTAINED IN THE DOCUMENTS SPECIFIED
IN PARAGRAPH (1) OR (2), ABOVE.

          A copy of the authorization of the trustee to exercise corporate trust
          powers is on file with the Securities and Exchange Commission as
          Exhibit 3 to Amendment No. 1 to the Statement of Eligibility and
          Qualification of Trustee (Form T-1) filed with the Registration
          Statement of Morse Shoe, Inc. (File No. 22-17940) and is incorporated
          herein by reference thereto.

         4.   A COPY OF THE EXISTING BY-LAWS OF THE TRUSTEE, OR
INSTRUMENTS CORRESPONDING THERETO.

          A copy of the by-laws of the trustee, as now in effect, is on file
          with the Securities and Exchange Commission as Exhibit 4 to the
          Statement of Eligibility and Qualification of Trustee (Form T-1) filed
          with the Registration Statement of Eastern Edison Company (File No.
          33-37823) and is incorporated herein by reference thereto.

         5.   A COPY OF EACH INDENTURE REFERRED TO IN ITEM 4.
IF THE OBLIGOR IS IN DEFAULT.

          Not applicable.

         6.   THE CONSENTS OF UNITED STATES INSTITUTIONAL
TRUSTEES REQUIRED BY SECTION 321(B) OF THE ACT.

          The consent of the trustee required by Section 321(b) of the Act is
          annexed hereto as Exhibit 6 and made a part hereof.

         7.   A COPY OF THE LATEST REPORT OF CONDITION OF THE
TRUSTEE PUBLISHED PURSUANT TO LAW OR THE REQUIREMENTS  OF
ITS SUPERVISING OR EXAMINING AUTHORITY.

          A copy of the latest report of condition of the trustee published
          pursuant to law or the requirements of its supervising or examining
          authority is annexed hereto as Exhibit 7 and made a part hereof.


                                      NOTES

     In answering any item of this Statement of Eligibility which relates to
matters peculiarly within the knowledge of the obligor or any underwriter for
the obligor, the trustee has relied upon information furnished to it by the
obligor and the underwriters, and the trustee disclaims responsibility for the
accuracy or completeness of such information.

     The answer furnished to Item 2. of this statement will be amended, if
necessary, to reflect any facts which differ from those stated and which would
have been required to be stated if known at the date hereof.



                                    SIGNATURE

     Pursuant to the requirements of the Trust Indenture Act of 1939, as
amended, the trustee, State Street Bank and Trust Company, a corporation
organized and existing under the laws of The Commonwealth of Massachusetts, has
duly caused this statement of eligibility to be signed on its behalf by the
undersigned, thereunto duly authorized, all in the City of Boston and The
Commonwealth of Massachusetts, on the 19th day of May 1997.

                            STATE STREET BANK AND TRUST COMPANY


                            By: /s/ PATRICK E. THEBADO
                                ----------------------
                                NAME: PATRICK E. THEBADO
                                TITLE: ASSISTANT VICE PRESIDENT

<PAGE>
                                    EXHIBIT 6


                             CONSENT OF THE TRUSTEE

     Pursuant to the requirements of Section 321(b) of the Trust Indenture Act
of 1939, as amended, in connection with the proposed issuance by Tosco
Corporation of its $200,000,000 7.25% NOTES DUE 2007, $300,000,000 7.80%
DEBENTURES DUE 2027, $100,000,000 7.90% DEBENTURES DUE 2047, we hereby consent
that reports of examination by Federal, State, Territorial or District
authorities may be furnished by such authorities to the Securities and Exchange
Commission upon request therefor.

                           STATE STREET BANK AND TRUST COMPANY


                           By: /s/ PATRICK E. THEBADO
                               ---------------------
                               NAME: PATRICK E. THEBADO
                               TITLE:  ASSISTANT VICE PRESIDENT

DATED: MAY 19, 1997
<PAGE>
                                    EXHIBIT 7

Consolidated Report of Condition of State Street Bank and Trust Company of
Boston, Massachusetts and foreign and domestic subsidiaries, a state banking
institution organized and operating under the banking laws of this commonwealth
and a member of the Federal Reserve System, at the close of business DECEMBER
31, 1996, published in accordance with a call made by the Federal Reserve Bank
of this District pursuant to the provisions of the Federal Reserve Act and in
accordance with a call made by the Commissioner of Banks under General Laws,
Chapter 172, Section 22(a).

<TABLE>
<CAPTION>

                                                                              Thousands of
ASSETS                                                                         Dollars

Cash and balances due from depository institutions:
<S>                                                             <C>             <C>      
         Noninterest-bearing balances and currency and coin ............        1,561,409
         Interest-bearing balances......................................        7,562,240
Securities..............................................................        9,388,513
Federal funds sold and securities purchased
  under agreements to resell in
  domestic offices of the bank and its Edge subsidiary..................        5,622,962
Loans and lease financing receivables:
         Loans and leases, net of unearned income .............. 4,858,187
         Allowance for loan and lease losses....................    72,614
         Loans and leases, net of unearned income and allowances........        4,785,573
Assets held in trading accounts.........................................          874,700
Premises and fixed assets...............................................          383,955
Other real estate owned.................................................              870
Investments in unconsolidated subsidiaries..............................           93,621
Customers' liability to this bank on acceptances outstanding............           35,022
Intangible assets.......................................................          148,190
Other assets............................................................          932,673
                                                                                ---------

Total assets............................................................       31,389,728
                                                                              ===========

LIABILITIES

Deposits:
         In domestic offices............................................        8,508,096
                  Noninterest-bearing........................... 6,435,131
                  Interest-bearing.............................. 2,072,965
         In foreign offices and Edge subsidiary.........................        11,395,724
                  Noninterest-bearing...........................    27,508
                  Interest-bearing..............................11,368,216
Federal funds purchased and securities sold under
         agreements to repurchase in domestic offices of
         the bank and of its Edge subsidiary............................         7,518,222
Demand notes issued to the U.S. Treasury and Trading Liabilities........           733,935
Other borrowed money....................................................           650,578
Bank's liability on acceptances executed and outstanding................            35,022
Other liabilities.......................................................           770,029
                                                                                ----------

Total liabilities.......................................................        29,611,606

EQUITY CAPITAL
Common stock............................................................            29,931
Surplus.................................................................           358,146
Undivided profits.......................................................         1,389,720
Cumulative foreign currency translation adjustments.....................               325
                                                                                ----------

Total equity capital....................................................         1,778,122
                                                                                ----------

Total liabilities and equity capital....................................        31,389,728
                                                                              ============
</TABLE>
<PAGE>

I, Rex S. Schuette, Senior Vice President and Comptroller of the above named
bank do hereby declare that this Report of Condition has been prepared in
conformance with the instructions issued by the Board of Governors of the
Federal Reserve System and is true to the best of my knowledge and belief.

                                             Rex S. Schuette


We, the undersigned directors, attest to the correctness of this Report of
Condition and declare that it has been examined by us and to the best of our
knowledge and belief has been prepared in conformance with the instructions
issued by the Board of Governors of the Federal Reserve System and is true and
correct.

                                             David A. Spina
                                             Marshall N. Carter
                                             Charles F. Kaye
<PAGE>
     5. A COPY OF EACH INDENTURE REFERRED TO IN ITEM 4. IF THE OBLIGOR IS IN
DEFAULT.

     Not applicable.

     6. THE CONSENTS OF UNITED STATES INSTITUTIONAL TRUSTEES REQUIRED BY SECTION
321(B) OF THE ACT.

     The consent of the trustee required by Section 321(b) of the Act is annexed
hereto as Exhibit 6 and made a part hereof.

     7. A COPY OF THE LATEST REPORT OF CONDITION OF THE TRUSTEE PUBLISHED
PURSUANT TO LAW OR THE REQUIREMENTS OF ITS SUPERVISING OR EXAMINING AUTHORITY.

     A copy of the latest report of condition of the trustee published pursuant
to law or the requirements of its supervising or examining authority is annexed
hereto as Exhibit 7 and made a part hereof.

                                      NOTES

     In answering any item of this Statement of Eligibility which relates to
matters peculiarly within the knowledge of the obligor or any underwriter of the
obligor, the trustee has relied upon the information furnished to it by the
obligor and the underwriters, and the trustee disclaims responsibility for the
accuracy or completeness of such information.

     The answer to Item 2. of this statement will be amended, if necessary, to
reflect any facts which differ from those stated and which would have been
required to be stated if known at the date hereof.


                                    SIGNATURE

     Pursuant to the requirements of the Trust Indenture Act of 1939, as
amended, the trustee, State Street Bank and Trust Company, a corporation duly
organized and existing under the laws of The Commonwealth of Massachusetts, has
duly caused this statement of eligibility to be signed on its behalf by the
undersigned, thereunto duly authorized, all in the City of Boston and The
Commonwealth of Massachusetts, on the 19th day of May 1997.

                                 STATE STREET BANK AND TRUST COMPANY


                                 By:/s/ PATRICK E. THEBADO
                                    ----------------------
                                    NAME: PATRICK E. THEBADO
                                    TITLE: ASSISTANT VICE PRESIDENT

<PAGE>
                                    EXHIBIT 6


                             CONSENT OF THE TRUSTEE

     Pursuant to the requirements of Section 321(b) of the Trust Indenture Act
of 1939, as amended, in connection with the proposed issuance by TOSCO
CORPORATION of its $200,000,000 7.25% NOTES DUE 2007, $300,000,000 7.80%
DEBENTURES DUE 2027, $100,000,000 7.90% DEBENTURES DUE 2047, we hereby consent
that reports of examination by Federal, State, Territorial or District
authorities may be furnished by such authorities to the Securities and Exchange
Commission upon request therefor.

                                 STATE STREET BANK AND TRUST COMPANY


                                 By:/s/ PATRICK E. THEBADO
                                    ----------------------
                                    NAME: PATRICK E. THEBADO
                                    TITLE: ASSISTANT VICE PRESIDENT

DATED:    MAY 19, 1997


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