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                                                                   EXHIBIT 10.1


                           FIFTH AMENDMENT AGREEMENT

         This Fifth Amendment Agreement dated as of November 3, 1995 (this
"Amendment") is by and among (i) Union Texas Petroleum Holdings, Inc., a
Delaware corporation ("Company"), (ii) the undersigned lenders ("Banks") which
are parties to the Amended and Restated Credit Agreement dated as of May 13,
1994, as amended by the First Amendment Agreement dated as of November 21,
1994, the Second Amendment Agreement dated as of January 31, 1995, the Third
Amendment Agreement dated as of April 24, 1995 and the Fourth Amendment
Agreement dated as of June 16, 1995 (as so amended, the "Agreement") among the
Company, the lenders party thereto, NationsBank of Texas, N.A., as agent
("Agent"), and the Co-Agents named therein, (iii) the Agent and (iv) the
Co-Agents.  In consideration of the mutual covenants contained herein, the
Company, the Banks, the Co-Agents and the Agent agree as set forth herein.

         1.      Amendments to Credit Agreement.  The Agreement is hereby
amended as follows:

                 1.1.  Section 1.01.  Section 1.01 of the Agreement is hereby
amended by (i) deleting the definitions of "Obligors", "Required Guarantors",
"Subsidiary Guarantors" and "Subsidiary Guaranty Agreement" and (ii) amending
the definitions of "ERISA Group" and "Financing Documents" to read as follows:

                 "ERISA Group" means the Company and all members of a
         controlled group of corporations and all trades or businesses (whether
         or not incorporated) under common control which, together with the
         Company, are treated as a single employer under Section 414 of the
         Internal Revenue Code.

                 "Financing Documents" means this Agreement and the Notes.

                 1.2.  References to Obligors.  Sections 2.05(c), 2.13 and
4.04(c) of the Agreement are hereby amended, on each occurrence thereof of the
phrase "any Obligor", by deleting such phrase and inserting in lieu thereof the
phrase "the Company".  Sections 3.01(e) and 3.01(h) of the Agreement are hereby
amended, on each occurrence thereof of the phrase "the Obligors", by deleting
such phrase and inserting in lieu thereof the phrase "the Company".  Section
4.01 of the Agreement is hereby amended by deleting the phrase "Each of the
Obligors" and inserting in lieu thereof the phrase "The Company".  Section 4.02
of the Agreement is hereby amended, on each occurrence thereof of any of the
phrases "by each Obligor", "within such Obligor's corporate powers", "of such
Obligor" or "upon such Obligor", by deleting each such phrase and inserting in
lieu thereof the phrase "by the Company", "within the Company's corporate
powers", "of the Company" or "upon the Company", respectively.

                 1.3.  Section 2.17(b).  Section 2.17(b) of the Agreement is
hereby amended in its entirety to read as follows:





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                          (b)     In addition, the Company agrees to pay any
         present or future stamp or documentary taxes or any other excise or
         property taxes, assessments, charges or similar levies which arise
         from any payment made hereunder or under the Notes or from the
         execution, delivery or registration of, or otherwise with respect to,
         this Agreement or any of the Notes (hereinafter referred to as "Other
         Taxes").

                 1.4.  Section 3.01(c).  Section 3.01(c) of the Agreement is
hereby deleted in its entirety and the phrase "INTENTIONALLY DELETED" is
inserted in lieu thereof.

                 1.5.  Section 3.01(g).  Section 3.01(g) of the Agreement is
hereby deleted in its entirety and the phrase "INTENTIONALLY DELETED" is
inserted in lieu thereof.

                 1.6.  Section 4.03.  Section 4.03 of the Agreement is hereby
amended in its entirety to read as follows:

                          SECTION 4.03.  Binding Effect.  This Agreement and
         each of the Notes have been duly executed and delivered by the Company
         and constitute legal, valid and binding agreements of the Company.

                 1.7.  Section 4.08.  Section 4.08 of the Agreement is hereby
amended in its entirety to read as follows:

                          SECTION 4.08.  Subsidiaries.  All Restricted Assets
         are owned as of the date of this Agreement by the Company and the
         Persons listed in Part B of Schedule II hereto or, in the case of
         Restricted Assets sold since December 31, 1993, by Persons other than
         Unrestricted Subsidiaries.  Part A of Schedule II hereto contains a
         true, complete and accurate list of all Unrestricted Subsidiaries, and
         Part B of Schedule II hereto contains a true, complete and accurate
         list of all Restricted Subsidiaries as of the date of this Agreement.

                 1.8.  Section 5.10.  Section 5.10 of the Agreement is hereby
amended in its entirety to read as follows:

                          SECTION 5.10.  Addition of Guarantors.  If any
         Subsidiary of the Company Guarantees (i) Debt (other than Funded Debt)
         of the Company having an aggregate outstanding balance less than
         $25,000,000, and any Guarantee of such Debt has not been released or
         terminated within 60 days of the date of the incurrence of such
         obligation or (ii) Debt (other than Debt described in clause (i)
         above) of the Company, then the Company shall (a) cause all Loans and
         all other amounts payable at any time under any of the Financing
         Documents, including, without limitation, interest which accrues
         during a proceeding which occurs under the U.S. Bankruptcy Code or
         which would otherwise accrue under





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         the terms of any of the Financing Documents, but for a proceeding
         under the U.S. Bankruptcy Code, to be equally and ratably guaranteed
         by such Subsidiary, (b) cause such Subsidiary to execute and deliver a
         subsidiary guaranty agreement in form and substance satisfactory to
         the Banks, and (c) deliver an opinion of counsel and officers'
         certificate to the effect that such subsidiary guaranty agreement has
         been duly authorized and executed by such Subsidiary and constitutes
         the legal, valid, binding and enforceable obligation of such
         Subsidiary, all in form and substance satisfactory to the Banks.
         "Funded Debt" of any Person means at any date, all Debt (including,
         without limitation, Debt incurred under any revolving credit, letter
         of credit or working capital facility) of such Person that matures by
         its terms, or that is renewable at the option of such Person to a date
         more than one year after the date on which such Debt is originally
         incurred.

                 1.9.  Section 5.19.  Section 5.19 of the Agreement is hereby
deleted in its entirety and the phrase "INTENTIONALLY DELETED" is inserted in
lieu thereof.

                 1.10.  Section 5.20.  Section 5.20 of the Agreement is hereby
amended in its entirety to read as follows:

                          SECTION 5.20.  Conversion to Unrestricted Subsidiary.
         The Company may convert a Restricted Subsidiary into an Unrestricted
         Subsidiary by giving the Agent notice of such conversion at least 5
         Domestic Business Days prior to such conversion; provided that (i) no
         Restricted Subsidiary shall be so converted so long as it owns
         directly or indirectly any interest in any Restricted Asset and (ii)
         no such conversion shall be made if at the time of such notice or
         after giving effect to such conversion, any Default would exist.

                 1.11.  Section 6.01(c).  Section 6.01(c) of the Agreement is
hereby amended in its entirety to read as follows:

                          (c)              the Company or any Subsidiary shall
         fail to observe or perform any covenant or agreement contained in this
         Agreement (other than those covered by clause (a) or (b) above) for 30
         days after written notice thereof has been given to the Company by the
         Agent at the request of any Bank;

                 1.12.  Section 6.01(d).  Section 6.01(d) of the Agreement is
hereby amended in its entirety to read as follows:

                          (d)              any representation, warranty,
         certification or statement made by the Company or any Subsidiary in
         this Agreement or made in any certificate, financial statement or
         other document delivered pursuant to this Agreement shall prove to
         have been incorrect in any material respect when made (or deemed
         made);





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                 1.13.  Section 7.01.  Section 7.01 of the Agreement is hereby
amended in its entirety to read as follows:

                          SECTION 7.01.  Appointment and Authorization.  Each
         Bank irrevocably appoints and authorizes the Agent to take such action
         as agent on its behalf and to exercise such powers under the Financing
         Documents as are delegated to the Agent by the terms hereof or
         thereof, together with all such powers as are reasonably incidental
         thereto.

         2.      Return of Guaranty.  The Banks hereby consent to the release
of the Subsidiary Guarantors from the Subsidiary Guaranty Agreement (defined
below), and hereby authorize and direct the Agent, on behalf of the Banks, to
execute and deliver a Release of Guaranty substantially in the form attached as
Exhibit A hereto and to deliver to the Company the Amended and Restated
Subsidiary Guaranty Agreement dated as of May 13, 1994, as amended by the First
Amendment to Amended and Restated Subsidiary Guaranty Agreement dated as of
November 21, 1994 and by the Second Amendment to Amended and Restated
Subsidiary Guaranty Agreement dated as of April 24, 1995 (as so amended, the
"Subsidiary Guaranty Agreement") executed by Union Texas Petroleum Energy
Corporation, Union Texas Products Corporation, Union Texas East Kalimantan
Limited, Union Texas International Corporation, Unistar, Inc. and the Agent.
Upon such delivery the Subsidiary Guaranty Agreement shall be deemed released.

         3.      Effectiveness.  The effectiveness of this Amendment is subject
to the receipt by the Agent of counterparts of this Amendment signed by the
Company, the Banks, the Agent and the Co-Agents (or, in the case of any party
as to which an executed counterpart shall not have been received, receipt by
the Agent in form satisfactory to it of telegraphic, telex or other written
confirmation from such party of execution of a counterpart hereof by such
party).

         4.      Miscellaneous.

                 4.1.  Amendments, Etc.  No amendment or waiver of any
provision of this Amendment, nor consent to any departure by the Company
therefrom, shall in any event be effective unless effected in accordance with
Section 9.05 of the Agreement.

                 4.2.  Governing Law.  This Amendment and the Agreement as
amended hereby shall be construed in accordance with and governed by the laws
of the State of Texas.

                 4.3.  Preservation.  Except as specifically modified by the
terms of this Amendment, all of the terms, provisions, covenants, warranties
and agreements contained in the Agreement (including, without limitation,
exhibits thereto) or any other Financing Document remain in full force and
effect.  Undefined capitalized terms used herein are used herein as defined in
the Agreement as amended hereby.





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                 4.4.  Execution in Counterparts.  This Amendment may be
executed in any number of counterparts, each of which when so executed shall be
deemed to be an original, with the same effect as if the signatures thereto and
hereto were upon the same instrument.

                 4.5.  Representations and Warranties.  The Company hereby
represents and warrants to the Banks, the Co- Agents and the Agent that (i) the
representations and warranties contained in Article IV of the Agreement (other
than the representations and warranties contained in Sections 4.04(a) and
4.04(c) thereof) are correct on and as of the date hereof as though made on and
as of the date hereof, with this Amendment and the Agreement as amended hereby,
constituting "Financing Documents" for purposes thereof, and (ii) no event has
occurred and is continuing which constitutes a Default or an Event of Default.

                 4.6.  Default.  Without limiting any other event which may
constitute an Event of Default, in the event that any representation or
warranty set forth herein shall be incorrect or misleading in any material
respect when made, such event shall constitute an "Event of Default" under the
Agreement, as amended hereby.

                 IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be executed by their respective officers thereunto duly
authorized, as of the date first above written.


                                        UNION TEXAS PETROLEUM HOLDINGS, INC.
                                        
                                        
                                        By:   /s/ M.N. MARKOWITZ         
                                           ----------------------------------- 
                                              M.N. Markowitz
                                              Vice President and Treasurer

BANKS:

NATIONSBANK OF TEXAS, N.A.              BANK OF AMERICA NATIONAL TRUST AND    
                                        SAVINGS ASSOCIATION                   

By:   /s/  PAUL A. SQUIRES  
   -----------------------------------  By:   /s/  LAURA B. SHEPARD
      Paul A. Squires                      -----------------------------------
      Senior Vice President                   Authorized Officer              
                                              Laura B. Shepard
                                              Vice President




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UNION BANK OF SWITZERLAND,              MELLON BANK, N.A.                     
HOUSTON AGENCY                                                                
                                                                              
                                        By:   /s/  [Illegible]
By:   /s/  E. SWANN                         -----------------------------------
   -----------------------------------        Authorized Officer              
      Authorized Officer                                                      
                                                   
                                        MORGAN GUARANTY TRUST                 
By:   /s/  [Illegible]                   COMPANY OF NEW YORK                   
   -----------------------------------                                        
      Authorized Officer                                                      
                                        By:   /s/  VERNON M. FORD, JR.
                                           -----------------------------------
THE BANK OF NOVA SCOTIA                       Authorized Officer              
                                                                              
                                                                              
By:   /s/  M. D. SMITH                  BANQUE NATIONALE DE PARIS,            
   -----------------------------------  HOUSTON AGENCY                        
      Authorized Officer                                                      
      M. D. Smith
      Agent Operations                  By:   /s/  [Illegible]                 
                                           -----------------------------------
                                              Authorized Officer              
CHEMICAL BANK                                 
                                                                              
By:   /s/  [Illegible]                  LTCB TRUST COMPANY                    
   -----------------------------------                                        
      Authorized Officer                                                      
                                        By:   /s/  [Illegible]                
                                           -----------------------------------
CREDIT LYONNAIS CAYMAN                        Authorized Officer              
ISLAND BRANCH                                                                 
                                                                              
                                        SOCIETE GENERALE, SOUTHWEST AGENCY    
By:   /s/  XAVIER RATOUIS                                                     
   -----------------------------------                                        
      Authorized Officer                By:   /s/  [Illegible]                
      Xavier Ratouis                       -----------------------------------
                                              Authorized Officer              

THE FIRST NATIONAL BANK OF CHICAGO                                            
                                        THE BANK OF TOKYO, LTD.,              
                                        DALLAS AGENCY                         
By:   /s/  DANIEL B. CATLIN                                                   
   -----------------------------------                                        
      Authorized Officer                By:   /s/  J. McINTYRE                
      Daniel B. Catlin                     -----------------------------------
      Vice President                          Authorized Officer              
                                              J. McIntyre                     
                                              Vice President                  
                                        
                                       



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BANQUE PARIBAS, HOUSTON AGENCY          THE MITSUBISHI TRUST &                
                                        BANKING CORPORATION                   
                                                                              
By:   /s/  [Illegible]
   -----------------------------------  By:   /s/  [Illegible]                
      Authorized Officer                   -----------------------------------
                                              Authorized Officer              
                                                                              
By:   /s/  [Illegible]                                                        
   -----------------------------------  NATIONAL WESTMINSTER BANK             
      Authorized Officer                PLC (NEW YORK BRANCH)                 
                                                                              
                                                                              
CHRISTIANIA BANK                        By:   /s/  [Illegible]                
                                           -----------------------------------
                                              Authorized Officer              
By:   /s/  [Illegible]                                                        
   -----------------------------------                                        
      Authorized Officer                NATIONAL WESTMINSTER BANK             
                                        PLC (NASSAU BRANCH)                   
                                                                              
By:   /s/  [Illegible]                                                        
   -----------------------------------  By:   /s/  [Illegible]                
      Authorized Officer                   -----------------------------------
                                              Authorized Officer              
                                                                              
CITIBANK, N.A.                                                                
                                        THE YASUDA TRUST AND BANKING          
                                        COMPANY, LIMITED, NEW YORK            
By:   /s/  AREZOO TAFARI                BRANCH                                
   -----------------------------------                                        
      Authorized Office                                                       
      Arezoo Tafari                     By:   /s/  GERALD T. GILL
      Assistant Vice President          -----------------------------------
                                              Authorized Officer              
DRESDNER BANK AG, NEW YORK
AND GRAND CAYMAN BRANCHES                                                     
                                                                              
                                        BANK OF TAIWAN                        
By:   /s/  B. CRAIG ERICKSON
   -----------------------------------                                        
      Authorized Officer                By:   /s/  [Illegible]
      B. Craig Erickson VP              -----------------------------------
                                        Authorized Officer              


By:   /s/  J. MICHAEL LEFFLER                                
   -----------------------------------
      Authorized Officer                                        
      J. Michael Leffler
      Senior Vice President



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BANQUE FRANCAISE DU                     BANK OF AMERICA NATIONAL TRUST AND    
COMMERCE EXTERIEUR                      SAVINGS ASSOCIATION, as Co-Agent      
                                                                              
                                                                              
By: /s/ IAIN A. WHYTE                   By: /s/ LAURA B. SHEPARD
   -----------------------------------     -----------------------------------
      Authorized Officer                      Authorized Officer              
      Iain A. Whyte                           Laura B. Shepard
      Assistant Vice President                Vice President
                                                                              
By: /s/ MARK A. HARRINGTON              UNION BANK OF SWITZERLAND,            
   -----------------------------------  HOUSTON AGENCY, as Co-Agent           
      Authorized Officer
      Mark A. Harrington
      Vice President & Regional Manager

                                        By:  /s/ E. SWANN
DEN NORSKE BANK AS                         -----------------------------------
                                              Authorized Officer              
                                                                              
By: /s/ [ILLEGIBLE]
   -----------------------------------  By:  /s/ [ILLEGIBLE]
      Authorized Officer                   -----------------------------------
                                              Authorized Officer              
                                        
By: /s/ [ILLEGIBLE]                                    
   -----------------------------------  
      Authorized Officer                
                                        
                                        
FIRST INTERSTATE BANK OF TEXAS, N.A.    
                                        
                                        
By: /s/ [ILLEGIBLE]                                  
   -----------------------------------
      Authorized Officer

NATIONSBANK OF TEXAS, N.A., as Agent  
                                      
                                      
By: /s/ PAUL A. SQUIRES                                  
   -----------------------------------
      Paul A. Squires                 
      Senior Vice President           


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                                   EXHIBIT A

                              RELEASE OF GUARANTY

         This Release of Guaranty dated as of November 3, 1995 (this "Release")
is among Union Texas Petroleum Energy Corporation, Union Texas Products
Corporation, Union Texas East Kalimantan Limited, Union Texas International
Corporation, Unistar, Inc. (collectively, the "Subsidiary Guarantors"), Union
Texas Petroleum Holdings, Inc. (the "Company"), and NationsBank of Texas, N.A.,
as agent (the "Agent") for the banks under the Amended and Restated Credit
Agreement dated as of May 13, 1994 (as amended through the date hereof, the
"Credit Agreement") among the Company, the lenders and Co-Agents party thereto
and the Agent.

                             PRELIMINARY STATEMENT

         WHEREAS, the Subsidiary Guarantors have previously executed and
delivered the Amended and Restated Subsidiary Guaranty Agreement dated as of
May 13, 1994, as amended by the First Amendment to Amended and Restated
Subsidiary Guaranty Agreement dated as of November 21, 1994 and by the Second
Amendment to Amended and Restated Subsidiary Guaranty Agreement dated as of
April 24, 1995 (as so amended, the Subsidiary Guaranty Agreement") among the
Subsidiary Guarantors and the Agent;

         WHEREAS, the Company has requested that the Subsidiary Guarantors be
released from their obligations under the Subsidiary Guaranty Agreement;

         WHEREAS, Banks having at least 66 2/3% of the aggregate amount of the
Commitments (as defined in the Credit Agreement) have consented (in accordance
with clause (ii) of Section 3.03 of the Subsidiary Guaranty Agreement) to the
release of the Subsidiary Guarantors from their obligations under the
Subsidiary Guaranty Agreement and have authorized and directed the Agent to
take certain actions on behalf of the Banks pertaining to the Subsidiary
Guaranty Agreement in connection with the Fifth Amendment Agreement dated as of
November 3, 1995 among the Company, the Banks, the Co-Agents and the Agent;

         NOW, THEREFORE, the parties hereto agree as follows:

                                    RELEASE

         A.      Release of Obligations.  The Agent, on behalf of the Agent and
the Banks, hereby releases each of the Subsidiary Guarantors party to the
Subsidiary Guaranty Agreement of its respective obligations under the
Subsidiary Guaranty Agreement.





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         B.      Termination of Guaranty.  The Subsidiary Guarantors, the
Company and the Agent, on behalf of the Agent and the Banks, agree that the
Subsidiary Guaranty Agreement is hereby terminated.

         C.      Company's Acknowledgement and Confirmation.  The Company
hereby acknowledges receipt of delivery of the Subsidiary Guaranty Agreement,
and confirms to the Agent and the Banks that none of the Company's obligations
under any Financing Document (as defined in the Credit Agreement), and none of
the Banks' or the Agent's rights and remedies under any Financing Document, are
released, impaired or affected by the termination of the Subsidiary Guaranty
Agreement and the release of the Subsidiary Guarantors from their respective
obligations thereunder.

         D.      Representation.  The Subsidiary Guarantors and the Company
represent and warrant to the Agent and the Banks that each of the "Subsidiary
Guarantors" (as defined in the Subsidiary Guaranty Agreement) affected by this
Release has duly executed and delivered this Release.

         E.      Governing Law.  This Release shall be governed by and
construed in accordance with the applicable laws of the State of Texas and the
United States of America.

         F.      Counterparts.  This Release may be executed in any number of
counterparts and by different parties on separate counterparts, each of which
counterpart, when so executed and delivered, shall be deemed to be an original
and all of which counterparts taken together shall constitute a single
instrument, with the same effect as if the signatures thereto and hereto were
upon the same Release.

         IN WITNESS WHEREOF,  the parties hereto, by their officers duly
authorized have executed this Release as of the date first written above.


NATIONSBANK OF TEXAS, N.A.,             UNION TEXAS PETROLEUM
as Agent                                HOLDINGS, INC.
                                        
                                        
By:                                     By:         
   -----------------------------------     -----------------------------------
      Paul A. Squires                         M.N. Markowitz
      Senior Vice President                   Vice President and Treasurer




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SUBSIDIARY GUARANTORS:

UNION TEXAS PETROLEUM                   UNISTAR, INC.
ENERGY CORPORATION                      
                                        
                                        By:    
                                           -----------------------------------
By:                                           M.N. Markowitz
   -----------------------------------        Vice President              
      M.N. Markowitz                         
      Treasurer                         
                                        
                                        
UNION TEXAS PRODUCTS                    UNION TEXAS INTERNATIONAL
CORPORATION                             CORPORATION
                                        
                                        
By:                                     By:          
   -----------------------------------     -----------------------------------
      M.N. Markowitz                          M.N. Markowitz
      Treasurer                               Treasurer
                                        
                                        
UNION TEXAS EAST
KALIMANTAN LIMITED


By:          
   -----------------------------------
      M.N. Markowitz                                       
      Treasurer                                            





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