Exhibit 4 (b) AMENDMENT NO. 1 AMENDMENT NO. 1 dated as of December 20, 1993 between CROWN CENTRAL PETROLEUM CORPORATION, a corporation duly organized and validly existing under the laws of the State of Maryland (the "Company"); each of the lenders that is a signatory hereto ------- (individually, a "Bank" and, collectively, the "Banks"); and THE ---- ----- CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), a national banking association, as agent and letter of credit agent for the Banks (in such capacity, together with its successors in such capacity, the (Agent"). ----- The Company, the Banks and the Agent are parties to a Credit Agreement dated as of May 10, 1993 (as heretofore modified and supplemented and in effect on the date hereof, the "Credit ------ Agreement"), providing, subject to the terms and conditions - --------- thereof, for extensions of credit (by making loans and issuing letters of credit) to be made by said Banks to the Company in an aggregate principal or face amount not exceeding $125,000,000. The Company, the Banks and the Agent wish to amend the Credit Agreement in certain respects and, accordingly, the parties hereto hereby agree as follows: Section 1. Definitions. Except as otherwise defined ----------- in the Amendment No. 1, terms defined in the Credit Agreement are used herein as defined therein. Section 2. Amendment. Subject to the satisfaction of --------- the conditions precedent specified in Section 3 below, but effective as of the date hereof, Section 8.10(h) of the Credit Agreement shall be amended by deleting the words "purchase money" therefrom. Section 3. Conditions Precedent. As provided in -------------------- Section 2 above, the amendment to the Credit Agreement set forth in said Section 2 shall become effective, as of the date hereof, upon the execution and delivery of this Amendment No. 1 by the Company, the Majority Banks and the Agent. Section 4. Miscellaneous. Except as herein provided, ------------- the Credit Agreement shall remain unchanged and in full force and effect. This Amendment No. 1 may be executed in any number of counterparts, all of which taken together shall constitute one and the same amendatory instrument and any of the parties hereto may execute this Amendment No. 1 by signing any such counterpart. This Amendment No. 1 shall be governed by, and construed in accordance with, the law of the State of New York. Amendment No. 1 --------------- IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1 to be duly executed and delivered as of the day and year first above written. CROWN CENTRAL PETROLEUM CORPORATION By s/ --- Edward L. Rosenberg --------------------------------- Senior Vice President Finance and Administration THE CHASE MANHATTAN BANK (NATIONAL ASSOCIATION) By /s/ --- Caryn E. Cosentini ---------------------------------- Vice President THE FIRST NATIONAL BANK OF MARYLAND By /s/--- Theodore K. Oswald --------------------------------- Vice President SIGNET BANK/MARYLAND By /s/ --- Janice E. Godwin --------------------------------- Vice President FIRST NATIONAL BANK OF BOSTON By /s/ --- Stefen Breuer ---------------------------------- Vice President TEXAS COMMERCE BANK NATIONAL ASSOCIATION By /s/ --- Martha Gerwit ---------------------------------- Vice President YASUDA BANK AND TRUST COMPANY (U.S.A.) By /s/--- Rohn Laudenschlager --------------------------------- First Vice President BANK OF NOVA SCOTIA By /s/ --- J. Alan Edwards ---------------------------------- Vice President NATIONSBANK OF TEXAS, N.A. By /s/ --- Beverly J. Anderson --------------------------------- Vice President MARYLAND NATIONAL BANK By /s/ --- Michael Heredia ---------------------------------- Vice President THE CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), as Agent and Letter of Credit Agent By /s/ --- Caryn E. Cosentini ---------------------------------- Vice President