1 ITEM 14(a)3,EXHIBIT 23(b) CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS We hereby consent to the references to our firm in the Annual Report of Tesoro Petroleum Corporation on Form 10-K for the fiscal year ended December 31, 1995, filed with the Securities and Exchange Commission in Washington, D.C. pursuant to the Securities Exchange Act of 1934. NETHERLAND, SEWELL & ASSOCIATES, INC. By: /s/ FREDERIC D. SEWELL ----------------------------------- Frederic D. Sewell President Dallas, Texas March 12, 1996