EXHIBIT 99.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Penn Octane Corporation (the "Company") on Form 10-K for the period ending July 31, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned, Jerome B. Richter, Chief Executive Officer of the Company, and Ian T. Bothwell, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ Jerome B. Richter ------------------------------------------ Jerome B. Richter, Chief Executive Officer November 4, 2002 /s/ Ian T. Bothwell ------------------------------------------ Ian T. Bothwell, Chief Financial Officer November 4, 2002 84