EXHIBIT 23.3 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (No. 333-3226) of CITGO Petroleum Corporation of our report dated February 14, 2003 relating to the financial statements of LYONDELL-CITGO Refining LP, which appears in this Form 10-K. PRICEWATERHOUSECOOPERS LLP Houston, Texas March 21, 2003