Exhibit 23.3 INDEPENDENT AUDITORS' CONSENT We consent to the use in this Amendment No. 1 to the Registration Statement of Clark Refining & Marketing, Inc. on Form S-4 of our report dated February 6, 1998, appearing in the Prospectus, which is part of this Registration Statement. We also consent to the reference to us under the headings "Selected Financial Data" and "Experts" in such Prospectus. DELOITTE & TOUCHE LLP St. Louis, Missouri October 16, 1998