EXHIBIT 23 HOWELL CORPORATION Independent Auditors' Consent To Howell Corporation: We consent to the incorporation by reference in Registration Statement No. 33-28389 of Howell Corporation on Form S-8 of our report dated February 28, 2000, appearing in this Annual Report on Form 10-K of Howell Corporation for the year ended December 31, 1999. DELOITTE & TOUCHE LLP Houston, Texas March 22, 2000