1 EXHIBIT 23 CONSENT OF INDEPENDENT AUDITORS We consent to the use of our reports dated March 22, 1996 and March 24, 1995 with respect to the Combined Financial Statements of Medo Industries, Inc., Medo Manufacturing Corp. and Medo Industries Canada, Ltd. for each of the three years in the period ended December 31, 1995 incorporated by reference in the Current Report on Form 8-K dated October 2, 1996 of Quaker State Corporation. /s/ Ernst & Young LLP ERNST & YOUNG LLP White Plains, New York October 8, 1996.