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                                                                     Exhibit 5.1





          (412) 288-3196                     May 12, 1994


          Quaker State Corporation
          255 Elm Street
          Oil City, PA  16301


                    Re:  Registration Statement on Form S-8 for the
                         1994 Non-Employee Directors' Stock Option Plan
                         ----------------------------------------------
          Gentlemen:

                    We have acted as counsel to Quaker State Corporation, a
          Delaware corporation (the "Corporation"), in connection with the
          above-captioned Registration Statement (the "Registration Statement")
          covering 100,000 shares of Capital Stock, par value $1.00 per share,
          of the Corporation (the "Capital Stock") which may be purchased by
          non-employee directors of the Corporation under the Corporation's
          1994 Non-Employee Directors' Stock Option Plan (the "Plan").  The
          Plan provides that either authorized but unissued or treasury shares
          of Capital Stock may be issued or delivered upon the exercise of
          stock options granted under the Plan.  In rendering our opinion
          below, we have assumed that any previously issued shares reacquired
          by the Corporation and delivered under the Plan will have been duly
          authorized, validly issued and fully paid at the time of their
          original issuance.

                    In connection with this opinion, we have examined, among
          other things:

               (1)  the Plan, as currently in effect;

               (2)  the resolutions adopted by the Board of Directors of the
          Corporation on December 16, 1993 adopting the Plan subject to
          stockholder approval, authorizing the issuance of up to 100,000
          shares of Capital Stock thereunder and reserving 100,000 shares of
          Capital Stock for such purpose, such number of shares to be subject
          to adjustment or substitution in certain events as provided in
          Section 5 of the Plan;

               (3)  the Composite Certificate of Incorporation of the
                    Corporation; and

               (4)  the By-Laws of the Corporation, as currently in effect.

                    We also acted as counsel to the Corporation in connection
          with the preparation of the Proxy Statement for the Annual Meeting of
          Stockholders of the Corporation held on the date hereof at which
          approval of the adoption of the Plan was submitted to the
          Corporation's stockholders.  The Plan was attached to the Proxy
          Statement as an exhibit and was described
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       Quaker State Corporation       -2-                    May 12, 1994




          in the Proxy Statement.  A representative of this firm attended the
          Annual Meeting and examined the report of the Judges of Election
          which indicated that the adoption of the Plan was approved by the
          Corporation's stockholders.

                    Based upon the foregoing and upon an examination of such
          other documents, corporate proceedings, statutes, decisions and
          questions of law as we considered necessary in order to enable us to
          furnish this opinion, and subject to the assumption set forth above,
          we are pleased to advise you that in our opinion the 100,000 shares
          of Capital Stock being registered and which may be issued by the
          Corporation upon the exercise of stock options granted under the Plan
          have been duly authorized, and upon such issuance in accordance with
          the provisions of the Plan such shares will be validly issued, fully
          paid and nonassessable.

                    We hereby consent to the filing of this opinion as an
          Exhibit to the Registration Statement and to the use of our name
          under the caption "Legal Opinion" in the Section 10(a) Prospectus
          used in connection with the Plan and the Registration Statement.


                                             Yours truly,

                                             /s/ Reed Smith Shaw & McClay

                                             REED SMITH SHAW & McCLAY


          cc:  Gerald W. Callahan,
               Vice President, General Counsel
               and Secretary