EXHIBIT 99


                      SETTLEMENT AND STANDSTILL AGREEMENT
                      -----------------------------------

               This Agreement, dated as  of  April  4,  1996,  is among Kevin S.
Flannery, Alan Kaufman, Robert S. Washburn, James H.  Stone,  George  F.  Baker,
Douglas  Thompson, Gale E. Galloway, and Whelan Management Corp.  (together, the
"Solicitation  Parties"),  Ardsley  Advisory  Partners  ("Ardsley"),  and Tesoro
Petroleum Corporation ("Tesoro").

               WHEREAS,  on  or  about  December  26,  1995,  The   Stockholders
Committee  for  New  Management  of  Tesoro  Petroleum Corporation, comprised of
Messrs.   Flannery,  Kaufman,  Washburn,   Stone  and  Baker  (the  "Committee),
announced its intention to engage in  a  solicitation  (the  "Solicitation")  of
written consents for the purpose, inter alia, of removing the current members of
the  Board  of Directors of Tesoro and replacing them with a new Board comprised
of Messrs.  Kaufman,  Stone,  Baker,  Thompson  and  Galloway, and in connection
therewith filed with the Securities and Exchange Commission ("SEC") Schedule 13D
and preliminary Schedule 14A statements relating thereto; and

               WHEREAS, on or about December 26, 1995, the  Committee  commenced
an  action in the United States District Court for the Western District of Texas
(C.A. No. SA-95-CA-1298) (the  "Pending  Action")  against  Tesoro and its Chief
Executive Officer Bruce A. Smith; and

               WHEREAS, on or about January 8, 1996, defendants in  the  Pending
Action  filed  their  answer  to  the  amended  complaint,  and defendant Tesoro
asserted various  counterclaims  against  the  Solicitation  Parties  and others
relating, inter alia, to the Solicitation; and

               WHEREAS, on or  about  March  1,  1996,  the  Committee  filed  a
definitive  Schedule 14A (the "Committee Schedule") with the SEC, and thereafter
commenced the Solicitation pursuant thereto; and

               WHEREAS, the  parties  hereto  have  agreed  to  the  terms  of a
proposed settlement that would result in the dismissal of the Pending Action and
termination of the Solicitation substantially in accord with the terms set forth
below;

               NOW, THEREFORE, in order to effectuate the  settlement,  and  for
other   good  and  valuable  consideration,  the  receipt  of  which  is  hereby
acknowledged, the parties hereto agree as follows:

               1.  The  parties shall execute and file with the Court as soon as
practicable a stipulation  of  dismissal  without  prejudice  or costs to either
side, encompassing all


claims and counterclaims  in  the  Pending  Action.   All  discovery  and  other
proceedings in the Pending Action shall be suspended in the interim.

               2.  The  Solicitation  Parties  hereby  agree  to  terminate  the
Solicitation by, among other things, (a) promptly filing an amended Schedule 13D
Statement  announcing the termination of the Solicitation, (b) promptly issuing,
or causing to  be  issued,  with  Tesoro  a  joint  press release announcing the
settlement and termination of the Solicitation, and  (c)  executing  such  other
documents  as  may  be necessary or appropriate to accomplish the settlement set
forth herein.  In addition, by executing this Agreement Kevin S. Flannery hereby
revokes all notices to Tesoro of  his  intention to submit a slate of candidates
at the Company's 1996 annual meeting.

               3.  For a period beginning on the date hereof and ending  on  the
earlier  of  the  day  after  Tesoro's 1999 annual meeting or June 30, 1999 (the
"Standstill Period"),  each  of  the  Solicitation  Parties  severally agrees on
behalf of himself or itself and his or its affiliates, agents,  representatives,
or any person or entity controlled or under common control with any such member,
that  he  or  it  shall  not,  directly  or  indirectly, (a) make, or in any way
participate or assist in, or otherwise  encourage any attempt to take control of
Tesoro, without the approval of the Board, whether through  the  acquisition  of
shares  of  capital  stock during a tender offer for the common stock of Tesoro,
exercising voting rights with respect  to  shares of capital stock or otherwise,
provided,  however,  that  this  provision  shall  not  preclude  any   of   the
Solicitation  Parties  from  tendering  shares in response to a tender offer for
Tesoro  shares  that   is   made   without   the  participation,  assistance  or
encouragement of any of the Solicitation Parties; (b)  solicit  any  consent  or
participate or assist in any way or otherwise encourage any consent solicitation
seeking,  without  the approval of the Board, to remove any member of the Tesoro
Board of Directors and/or to  elect  one  or  more  new directors or to take any
other action which would have the effect of removing any member  of  the  Tesoro
Board  of  Directors;  (c)  commence,  support  (including without limitation by
giving a proxy or voting) or otherwise encourage any "solicitation" of "proxies"
to vote (as such terms are defined  in Rule 14a-1 of the Securities Exchange Act
of 1934) or become a "participant" in any "election contest" (as such terms  are
defined  in  Rule  14a-11  of the Securities Exchange Act of 1934) in connection
with any annual or special meeting of stockholders seeking, without the approval
of the Board, to remove any  member  of  the Tesoro Board of Directors and/or to
elect one or more new directors not nominated for election by the  Tesoro  Board
of  Directors;  (d)  nominate, support (including without limitation by giving a
proxy or voting)  or  otherwise  encourage  the  nomination  or  election of any
alternate director or slate of directors proposed from the

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floor at any annual or  special  meeting  of Tesoro stockholders; or (e) without
the approval of the Board, solicit, support or otherwise encourage any offers or
indications of interest with respect to the acquisition or disposition of Tesoro
or any of its business units.

               4.  Tesoro's Board of Directors shall be expanded to include nine
members.  Dr. Alan Kaufman shall be added to the Tesoro Board of Directors on or
before April 12,  1996.   Tesoro  further  agrees  that  Dr.  Kaufman  shall  be
nominated  for  election  as  part  of the Board of Directors' recommended slate
throughout the Standstill Period unless he  dies, resigns or is removed pursuant
to paragraph 9 below.  Dr. Kaufman agrees to serve as a director, if elected  by
the  requisite  vote of shareholders, throughout the Standstill Period unless he
dies, resigns or is removed pursuant to paragraph 9 below.

               5.  Tesoro  also  agrees  to  add   to  its  Board  of  Directors
throughout the Standstill Period another  independent  director  with  no  prior
relationship  or  connection  to  Tesoro,  Ardsley  or  any  of the Solicitation
Parties, who shall be  selected  by  the  Board  of Directors in accordance with
governance procedures that have been adopted by the Board.  Tesoro  agrees  that
the  individual  selected  pursuant  to  this  paragraph  shall  be proposed for
election as soon as possible but in  no  event later than July 31, 1996.  In the
event that the independent director selected pursuant to this paragraph shall at
any time during the Standstill Period die, resign or be removed from  the  Board
of  Directors  (for  any  reason other than the failure to receive the requisite
vote of shareholders),  Tesoro  agrees  to  replace  such  director with another
independent director selected  in  accordance  with  the  Company'  By-laws  and
governance procedures then in effect.

               6.  Tesoro  also  agrees to provide Ardsley during the Standstill
Period with the right to designate  one  of its employees (who shall not include
any of the Solicitation Parties or any affiliate, agent or representative of, or
other person or entity controlled by or under common control with,  any  of  the
Solicitation  Parties) as a nominee for election to Tesoro's Board of Directors,
subject to a normal background check.   Tesoro agrees that the person designated
by Ardsley pursuant to this paragraph will be added to the Tesoro  Board  on  or
before  April  12,  1996.  Tesoro further agrees that the employee designated by
Ardsley pursuant to this paragraph  shall  be  nominated for election as part of
the Board's recommended slate throughout the Standstill Period unless  he  dies,
resigns  or is removed pursuant to paragraph 10 below.  If such employee dies or
resigns, Ardsley shall be  entitled  to  designate  another employee to become a
director, subject to a normal background check.

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               7.  Dr. Kaufman hereby agrees not to disclose without the consent
of Tesoro any non-public information or trade secrets of Tesoro obtained in  his
capacity  as  a  director of Tesoro to any unauthorized person including without
limitation any of the Solicitation Parties, except as may be required by law.

               8.  Ardsley hereby agrees that  the person designated pursuant to
paragraph 6  above  shall  not  disclose  without  the  consent  of  Tesoro  any
non-public  information or trade secrets of Tesoro obtained in his capacity as a
director of Tesoro to any  unauthorized  person including without limitation any
of the Solicitation Parties, except as may be required by law.

               9.  In the event of a breach  of  the  provisions  set  forth  in
paragraphs  2,  3,  7,  12  or  13  of this Agreement by any of the Solicitation
Parties, or in the event  that  the  total  common stock holdings of Dr. Kaufman
shall at any time during the Standstill Period be reduced to less  than  400,000
shares,  or  in  the  event  that  Dr.  Kaufman  shall,  at  any time during the
Standstill Period, while he is a member of Tesoro's Board of Directors, announce
his intention to  vote  or  vote  his  shares  of  Tesoro  common  stock for any
candidate other than the nominees for election to  the  Board  of  Directors  of
Tesoro  proposed  by a majority of Tesoro's Board, Dr. Kaufman shall immediately
tender his resignation and, at the option  of Tesoro, be removed from the Tesoro
Board.  The death,  resignation  or  removal  pursuant  to  the  terms  of  this
Agreement of Dr. Alan Kaufman from the Tesoro Board shall not relieve any of the
Solicitation  Parties from their obligations hereunder, which shall continue and
remain in effect until the conclusion of the Standstill Period.

               10.  In the event of  a  breach  of  the  provisions set forth in
paragraph 8 above, or in the event that at any time during the Standstill Period
(a) the total common stock holdings of Ardsley shall at any time be  reduced  to
50  percent  or  less of the number of shares held as of the date hereof, or (b)
Ardsley agrees or takes any action to  support  a change of control of Tesoro or
the election to the Tesoro Board of any person other than a Board  nominee,  the
director  designated  by Ardsley pursuant to paragraph 6 above shall immediately
tender his resignation and, at the option  of Tesoro, be removed from the Tesoro
Board.  Ardsley agrees to vote all shares of common stock  of  Tesoro  owned  by
Ardsley  or with respect to which it or its affiliates have voting discretion in
favor of the entire slate of  candidates  proposed for election at Tesoro's 1996
annual meeting, provided  it  includes  the  individuals  selected  pursuant  to
paragraphs  4  and  6  above.   For purposes of this paragraph, Ardsley shall be
deemed the owner as of  the  date  hereof  of  all  shares covered by the option
granted to Whelan Management Corp. on November 18, 1995, unless the

                                       4

option is exercised, in whole or  in  part,  by  Whelan  or  any  other  of  the
Solicitation  Parties, in which case Ardsley shall not be deemed the owner as of
the date hereof of any shares acquired pursuant to the exercise of such option.

               11.  In consideration of  the  above  and  in  order to eliminate
future legal fees and expenses associated with continued  protracted  litigation
and  the  Solicitation,  Tesoro  agrees  to pay the Solicitation Parties each of
their reasonable  out-of-pocket  costs  (including  reasonable  attorneys' fees)
actually incurred in connection with the Pending Action and/or the Solicitation,
up to a maximum of $700,000.  Tesoro also agrees to pay Ardsley  its  reasonable
out-of-pocket  costs (including reasonable attorneys' fees) actually incurred in
connection with the Pending Action, up  to a maximum of $200,000.  Tesoro hereby
agrees to pay $500,000 to the Solicitation Parties and $140,000 to Ardsley  upon
execution  of this Agreement and issuance of the joint press release required by
paragraph 2 of this Agreement, with  the  balance  to  be paid within 15 days of
receipt of the documentation required by the succeeding sentence.  Tesoro  shall
have  the  right  to  examine  all invoices and other documentation necessary to
substantiate the amount and  reasonableness  of  any fees and expenses incurred.
In the event of any dispute regarding the amount of expenses  to  be  reimbursed
pursuant  to  this paragraph, the parties agree to submit the dispute to binding
arbitration.  The arbitrator shall be  Dean  John  Feerick of Fordham Law School
or, if he declines or is unable to serve, a mutually agreeable person of similar
standing in the legal community.   The  decision  of  the  arbitrator  shall  be
rendered  within  90  days  from  the  date  submitted to the arbitrator and the
decision shall be final,  conclusive  and  not  subject  to appeal.  In any such
arbitration, the prevailing party (i.e., the party to whom the arbitrator awards
the largest portion  of  the  amount  in  dispute)  shall  recover  his  or  its
reasonable attorneys' fees in connection therewith.

               12.  Each   of  the  Solicitation  Parties,  Ardsley  and  Tesoro
severally agrees that during the  Standstill  Period  neither  he nor it nor any
affiliate shall make any statement or  take  any  action  that  is  critical  or
disparaging  of  each other or the management or performance of Tesoro.  Each of
the Solicitation Parties and  Ardsley  further  severally agrees that throughout
the Standstill Period neither he nor it nor any of his or  its  affiliates  will
issue  any  press  release,  knowingly make any statements to the press or other
news media, or make  any  critical  or  disparaging  statement to any securities
analyst or institutional investor regarding the  management  or  performance  of
Tesoro.

               13.  Each  of  the  Solicitation Parties has delivered herewith a
Revocation of Consent (the "Revocation"), revoking

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all consents previously  executed  by  such  member  or  his affiliates, agents,
representatives, or any person or entity controlled by or under  common  control
with such member, if any, and such member represents and warrants to such effect
to  Tesoro.  Each of such members, on behalf of himself or itself and his or its
affiliates, agents,  representatives,  and  any  person  controlled  by or under
common control with him, agrees to the following:

               A.  Except as contemplated by paragraph C  of  this  Section  13,
          neither  he  nor  it  nor  any  of  his  or  its  affiliates,  agents,
          representatives, or any person or entity controlled by or under common
          control  with  such member, will sign or deliver any consents relating
          to any of the matters (the  "Matters")  as to which consents are, were
          or are proposed to be solicited pursuant to the Committee Schedule.

               B.  Neither he nor it nor any of his or its  affiliates,  agents,
          representatives, or any person or entity controlled by or under common
          control  with  such  member,  will  take  any  action  to  revoke  the
          Revocation.

               C.  Neither  he  nor it nor any of his or its affiliates, agents,
          representatives, or any person or entity controlled by or under common
          control with such member, will deliver to Tesoro any consents relating
          to any  of  the  Matters,  except  the  consent  dated  April 1, 1996,
          relating to 100 shares of common stock of Tesoro held in the  name  of
          Kevin  S.  Flannery,  which  consent  is  covered  and  revoked by the
          Revocation.

               D.  He   and   it   and   his   and   its   affiliates,   agents,
          representatives, and  any  person  or  entity  controlled  by or under
          common control with such member,  will  immediately  cease  soliciting
          consents relating to the Matters, will not encourage, and, in response
          to  any  inquiry  will specifically discourage, all other persons with
          respect to the delivery to Tesoro  of  consents relating to any of the
          Matters.

               14.  The parties  hereto  agree  that  any  breach  of  the  this
Agreement  shall  constitute  irreparable  harm  and entitle any party to obtain
immediate injunctive relief to  enforce  compliance  with the terms hereof.  The
failure of any party to seek or obtain immediate relief shall not  constitute  a
waiver  of,  and  shall  not  relieve  any  party  from,  his or its obligations
hereunder.

               15.  In the event that Tesoro or the Board of Directors of Tesoro
shall breach the provisions of paragraphs 4,  5,  6 or 12 of this Agreement, the
Solicitation  Parties  shall  be  relieved  of  their  obligations  pursuant  to
paragraphs

                                       6

3 and 12 of this Agreement for the balance of the  Standstill  Period.   In  the
event  any of the Solicitation Parties shall breach the provisions of paragraphs
2, 3, 7, 12 or  13,  Tesoro  shall  be  relieved  of its obligations pursuant to
paragraphs 4, 5 and 12 of this Agreement.  In the event that Tesoro or the Board
of Directors of Tesoro shall breach the provisions of paragraphs 6 or 12 of this
Agreement, Ardsley shall be relieved of its obligations pursuant  to  paragraphs
10  and  12  of this Agreement for the balance of the Standstill Period.  In the
event that Ardsley shall breach the provisions of paragraphs 8, 10 or 12, Tesoro
shall be relieved of its  obligations  pursuant  to  paragraphs 6 and 12 of this
Agreement.

               16.  Immediately following the  end  of  the  Standstill  Period,
provided  that  the  parties  shall  have  complied  with the provisions of this
Agreement in all material  respects,  the  parties  hereto shall exchange mutual
general releases with respect to all claims or counterclaims which have or could
have been asserted, or which arise out of  any  of  the  acts,  transactions  or
events  alleged,  in  the Pending Action (the "Released Claims").  Tesoro hereby
covenants not to sue any or  each  of the Solicitation Parties or Ardsley during
the Standstill Period with respect to any  Released  Claim  provided  that  such
Solicitation  Party  or  Ardsley,  as  the case may be, complies with his or its
respective obligations pursuant to paragraphs 2, 3, 7, 12 and 13 above.  Each of
the  Solicitation  Parties  hereby  covenants  not  to  sue  Tesoro  during  the
Standstill Period  with  respect  to  any  Released  Claim  provided that Tesoro
complies with its obligations pursuant to paragraphs 4, 5, 6 and 12 above.  Each
of the parties hereto hereby agrees  to  toll  the  running  of  the  applicable
statutes of limitations with respect to the Released Claims until the conclusion
of the Standstill Period.  The provisions of this paragraph shall not operate as
a bar to an action to enforce the terms of this Agreement.

               17.  Except  as  otherwise  provided herein, this Agreement shall
remain in full force and effect  throughout the Standstill Period, unless all of
the parties hereto agree in writing to terminate this  Agreement  prior  to  the
conclusion of the Standstill Period.

               18.  No  modification,  amendment  or waiver of the terms of this
Agreement shall  be  enforceable  against  any  party  hereto  absent  a written
agreement signed by Tesoro and such other party.

               19.  If for any reason the settlement provided for herein is  not
consummated,  all  negotiations and proceedings relating to the settlement shall
be without prejudice to the rights of  the parties hereto, who shall be restored
to the status quo existing as of the date of this agreement.

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               20.  Neither this Agreement, nor the fact of  its  existence  nor
any  of  the terms hereof, nor any negotiations or proceedings relating thereto,
shall be offered or received in evidence  in  the Pending Action or in any other
action or proceeding, other than an action to  enforce  the  terms  hereof,  nor
shall  they  be  deemed  to constitute any evidence or admission of liability or
wrongdoing on the part of  any  party  to  the  Pending  Action, all of which is
expressly denied, it being understood that the parties have agreed to enter into
this Agreement and the settlement contemplated hereunder  solely  to  avoid  the
expense,  distraction  and  inconvenience  of  further protracted litigation and
other proceedings.

               21.  This Agreement shall inure to  the benefit of and is binding
upon the parties and their respective officers, directors, employees,  partners,
heirs, executors, successors, representatives, agents and assigns.

               22.  This Agreement shall be governed by the laws of the State of
New York, exclusive of the law on conflicts of laws.

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               23.  This   Agreement   may   be   executed   in  any  number  of
counterparts, each of which when so executed and delivered shall be an original.
The executed signature pages from  each  actual or telecopied counterpart may be
joined together and attached to such original and shall constitute one  and  the
same instrument.



Whelan Management Corp.                            /s/ Kevin S. Flannery
                                                   -----------------------------
                                                   Kevin S. Flannery


By: /s/ Kevin S. Flannery                          /s/ Alan Kaufman
   -------------------------------                 -----------------------------
   Title: President                                Alan Kaufman


Ardsley Advisory Partners                          /s/ Robert S. Washburn
                                                   -----------------------------
                                                   Robert S. Washburn


By: /s/ Kevin M. McCormack                         /s/ James H. Stone
   -------------------------------                 -----------------------------
   Title: Partner                                  James H. Stone


Tesoro Petroleum Corp.                             /s/ George F. Baker
                                                   -----------------------------
                                                   George F. Baker


By: /s/ Bruce A. Smith                             /s/ Douglas Thompson
   -------------------------------                 -----------------------------
   Title: President and                            Douglas Thompson
     Chief Executive
        Officer
                                                   /s/ Gale E. Galloway
                                                   -----------------------------
                                                   Gale E. Galloway




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