TOSCO FINANCING TRUST Prospectus Supplement dated November 4, 1997 to the Prospectus dated March 26, 1997 The Selling Holders selling Offered Securities pursuant to this Prospectus Supplement and certain information concerning the sale of the Offered Securities are as follows: Number of Offered Selling Holder Offered Securities Owned Securities to be Sold American Republic Insurance Company 2,000 2,000 United Teacher Associates Insurance Company 2,600 2,600 Century-National Insurance Company 6,000 6,000 Service Lloyds Insurance Company 200 200 Service Life and Casualty Insurance Company 200 200 Old Guard Fire Insurance Company 700 700 Concord Life Insurance Company 1,000 1,000 Lone Star Life Insurance Company 1,500 1,500 Reliable Life Insurance Company 3,000 3,000 Millers Casualty Insurance Company of Texas 1,600 1,600 Guarantee Trust Life Insurance Company 1,800 1,800 Physicians Mutual Insurance Company 500 500 United National Insurance Company 5,000 5,000 Zeneca Holdings 9,000 9,000 Delaware PERS 22,000 22,000 Pension Reserves Investment Management Board 35,000 35,000 Starvest Discretionary 4,650 4,650 SAIF Corporation 50,000 50,000 Oregon Equity 100,000 100,000 Island Insurance- Convertible Acc't 2,100 2,100 Valley Insurance 1,500 1,500 Natco Chemical Co.- Retirement 4,000 4,000 The above-listed securities will be sold to purchasers by the Selling Holders. There are no special arrangements or agreements with any brokers/dealers regarding the sale of the Offered Securities. The Selling Holders do not have, and during the past three years have not had, any material relationship with Tosco Corporation or any of its affiliates. The Date of this Prospectus Supplement is November 4, 1997