FFP Marketing Company, Inc.
November 30, 1998
Page 2

                                   Exhibit 5.1

                               Jenkens & Gilchrist
                           A PROFESSIONAL CORPORATION

                        FOUNTAIN PLACE
                 1445 ROSS AVENUE, SUITE 3200                   AUSTIN, TEXAS
                       DALLAS, TX 75202                        (512) 499-3800
                                                     
                         (214) 855-4500                        HOUSTON, TEXAS
                   TELECOPIER (214) 855-4300                   (713) 951-3300
              
                                                             SAN ANTONIO, TEXAS
                                                               (210) 246-5000

                                                               WASHINGTON, D.C.
WRITER'S DIRECT DIAL NUMBER                                    (202) 326-1500
    (214) 855-4361


                                November 30, 1998

FFP Marketing Company, Inc.
2801 Glenda Avenue
Fort Worth, Texas  76117

         Re:      FFP Marketing Company, Inc. Registration Statement

Gentlemen:

         We have  acted as  counsel  to FFP  Marketing  Company,  Inc.,  a Texas
corporation  (the  "Company"),   in  connection  with  the  preparation  of  the
Registration  Statement on Form S-8 (the  "Registration  Statement") to be filed
with the Securities and Exchange Commission on or about November 30, 1998, under
the  Securities  Act of 1933,  as amended (the  "Securities  Act"),  relating to
234,333  shares (the  "Shares")  of the $.01 par value common stock (the "Common
Stock") of the Company that have been or may be issued by the Company  under the
FFP Marketing Company, Inc. Nonqualified Stock Option Plan (the "Plan").

         You have  requested  the  opinion of this firm with  respect to certain
legal  aspects  of the  proposed  offering.  In  connection  therewith,  we have
examined and relied upon the original, or copies identified to our satisfaction,
of (1) the Articles of Incorporation and the Bylaws of the Company;  (2) minutes
and records of the  corporate  proceedings  of the Company  with  respect to the
establishment  of the Plan,  the  reservation  and issuance of 234,333 shares of
Common  Stock  pursuant to the Plan and related  matters;  (3) the  Registration
Statement and exhibits thereto, including the Plan; and (4) such other documents
and  instruments  as we have deemed  necessary  for the  expression  of opinions
herein  contained.  In making the  foregoing  examinations,  we have assumed the
genuineness of all signatures and the authenticity of all documents submitted to
us as  originals,  and the  conformity  to original  documents of all  documents
submitted to us as certified or photostatic  copies.  As to various questions of
fact material to this opinion, and as to the content and form of the Articles of
Incorporation,  the Bylaws, minutes, records, resolutions and other documents or
writings  of the  Company,  we have  relied,  to the  extent we deem  reasonably
appropriate,  upon  representations  or certificates of officers or directors of
the Company and upon documents,  records and instruments  furnished to us by the
Company, without independent check or verification of their accuracy.

         Based upon the firm's  examination,  consideration  of, and reliance on
the documents and other matters described above, and assuming that

         (1) the  outstanding  shares  are duly  granted,  and the  shares to be
granted in the future will be duly granted in  accordance  with the terms of the
Plan;

         (2) the Company maintains an adequate number of authorized but unissued
shares and/or  treasury  shares  available for issuance to those persons granted
shares of Common Stock under the Plan; and





FFP Marketing Company, Inc.
November 30, 1998
Page 2


         (3) the  consideration  for Common Stock issued pursuant to the Plan is
actually  received by the Company as provided in the Plan (and/or the agreements
executed in connection with the Plan), and exceeds the par value of such shares;

this firm is of the opinion that the Company  presently  has  available at least
234,333 shares of authorized but unissued and/or treasury shares of Common Stock
from which may be issued the 234,333  shares of Common  Stock issued or proposed
to be issued  pursuant to the exercise of options granted under the Plan and the
234,333  shares of Common Stock that may be issued in accordance  with the terms
of the Plan will be, when and if issued, duly and validly issued, fully paid and
nonassessable.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement and to references to our firm included in or made a part
of the Registration  Statement.  In giving this consent, we do not admit that we
come within the category of persons whose consent is required under Section 7 of
the Securities  Act or the Rules and  Regulations of the Securities and Exchange
Commission thereunder.

                                      Very truly yours,

                                      JENKENS & GILCHRIST,
                                      a Professional Corporation


                                      By: /s/ W. Alan Kailer   
                                         ---------------------
                                          W. Alan Kailer, Esq.

cc:      E. Leigh Gillett, Esq.
         Heather L. Radliff, Esq.