EXHIBIT 23.3 To: The Securities and Exchange Commission Re: Vista Exploration Corporation EXPERT CONSENT I consent to the reference to me in the discussion contained in "About Us and Our Current Plan of Operation - - Phase 1 - Our Area of Interest" and under the heading "Experts" in the Prospectus, which is part of this Post-Effective Amendment No. 1 to Registration Statement No. 333-65708 of Vista Exploration Corporation. /s/ William T. Stoeckinger -------------------------- William T. Stoeckinger Bartlesville, Oklahoma July 20, 2002