Exhibit 2.2
                                                                     -----------
                             STOCK OPTION AGREEMENT
                             ----------------------

         THIS STOCK OPTION AGREEMENT (this "Agreement"), dated as of October 15,
2000, between Chevron Corporation, a Delaware corporation ("Parent"), and Texaco
Inc., a Delaware corporation (the "Company").

                                               W I T N E S S E T H :

         WHEREAS, Parent and the Company are concurrently with the execution and
delivery of this  Agreement  entering  into an Agreement and Plan of Merger (the
"Merger  Agreement")  pursuant to which,  among other things,  Merger Subsidiary
will merge with and into the Company on the terms and subject to the  conditions
stated therein; and

         WHEREAS,  in order to induce Parent to enter into the Merger  Agreement
and as a condition  for  Parent's  agreeing so to do, the Company has granted to
Parent the Stock Option (as  hereinafter  defined),  on the terms and conditions
set forth herein;

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
set forth  herein and in the Merger  Agreement,  and for other good and valuable
consideration,  the adequacy of which is hereby acknowledged, the parties hereto
agree as follows:

         Section 1.  Definitions.  Capitalized terms used and not defined herein
have the respective meanings assigned to them in the Merger Agreement.

         Section 2.  Grant of Stock Option.
                     ---------------------

         (a) The  Company  hereby  grants to Parent an  irrevocable  option (the
"Stock Option") to purchase,  on the terms and subject to the conditions hereof,
for $53.71 per share (the  "Exercise  Price") in cash, up to  107,000,000  fully
paid and  non-assessable  shares (the "Option  Shares") of the Company's  common
stock, par value $3.125 per share (the "Common  Stock").  The Exercise Price and
number of Option  Shares shall be subject to  adjustment as provided in Sections
2(b) and 6 below.

         (b) In the event  that any (i)  additional  shares of Common  Stock are
issued or otherwise  become  outstanding  after the date of the Agreement (other
than  pursuant to this  Agreement)  or (ii) shares of Common Stock are redeemed,
repurchased,  retired or otherwise cease to be outstanding after the date of the
Agreement,  the number of shares of Common  Stock  subject  to the Stock  Option
shall be increased or decreased, as appropriate,  so that after such issuance or
redemption,  such number  equals  19.9% of the number of shares of Common  Stock
then issued and  outstanding  (without  giving  effect to any shares  subject or
issued pursuant to the Stock Option).  Nothing contained in this Section 2(b) or
elsewhere in this Agreement  shall be deemed to authorize  Parent or the Company
to breach any provision of the Merger Agreement.



                                      -1-


         Section 3.  Exercise of Stock Option.
                     ------------------------

         (a) Parent may, subject to the provisions of this Section, exercise the
Stock Option,  in whole or in part, at any time or from time to time,  after the
occurrence  of a  Company  Trigger  Event  (defined  below)  and  prior  to  the
Termination  Date.  "Termination  Date"  shall  mean  the  earliest  of (i)  the
Effective  Time  of the  Merger,  (ii) 90  days  after  the  date  full  payment
contemplated  by Section 10.5 of the Merger  Agreement is made by the Company to
Parent  thereunder  or (iii) one day after  the date of the  termination  of the
Merger  Agreement  so long as,  in the case of this  clause  (iii),  no  Company
Trigger Event has occurred or could still occur  pursuant to Section 10.5 of the
Merger Agreement. Notwithstanding the occurrence of the Termination Date, Parent
shall be entitled  to purchase  Option  Shares  pursuant to any  exercise of the
Stock Option,  on the terms and subject to the conditions  hereof, to the extent
Parent  exercised the Stock Option prior to the  occurrence  of the  Termination
Date. A "Company  Trigger Event" shall mean an event the result of which is that
the Company becomes obligated to pay a fee to Parent pursuant to Section 10.5 of
the Merger Agreement.

         (b) Parent may purchase Option Shares pursuant to the Stock Option only
if all  of the  following  conditions  are  satisfied:  (i)  no  preliminary  or
permanent  injunction  or other  order  issued by any  federal or state court of
competent  jurisdiction  in the  United  States  shall be in effect  prohibiting
delivery of the Option Shares,  (ii) any applicable waiting period under the HSR
Act shall have expired or been terminated,  and (iii) any prior  notification to
or approval of any other regulatory  authority in the United States or elsewhere
required in  connection  with such  purchase  shall have been made or  obtained,
other than those which if not made or obtained  would not reasonably be expected
to result in a Material  Adverse  Effect on the  Company  and its  Subsidiaries,
taken as a whole.

         (c) If Parent  shall be entitled  to and wishes to  exercise  the Stock
Option, it shall do so by giving the Company written notice (the "Stock Exercise
Notice") to such effect,  specifying the number of Option Shares to be purchased
and a place and closing date not earlier than three business days nor later than
10 business  days from the date of such Stock  Exercise  Notice.  If the closing
cannot be  consummated  on such date  because any  condition  to the purchase of
Option Shares set forth in Section 3(b) has not been satisfied or as a result of
any  restriction  arising under any applicable  law or  regulation,  the closing
shall  occur  five days (or such  earlier  time as  Parent  may  specify)  after
satisfaction of all such conditions and the cessation of all such  restrictions;
provided that in no event shall the closing of the purchase be postponed by more
than nine months after the Termination Date as a result of this clause (c).

         (d) So long as the Stock Option is exercisable pursuant to the terms of
Section 3(a) Parent may elect to send a written notice to the Company (the "Cash
Exercise  Notice")  specifying  a date not later than 20  business  days and not
earlier than 10 business  days  following the date such notice is given on which
date the Company  shall pay to Parent in exchange  for the  cancellation  of the
relevant  portion of the Stock  Option an amount in cash equal to the Spread (as
hereinafter  defined)  multiplied  by all or such  portion of the Option  Shares
subject to the Stock Option as Parent shall  specify.  As used herein,  "Spread"
shall mean the excess,  if any, over the Exercise  Price of the higher of (x) if
applicable,  the highest  price per share of Common Stock



                                      -2-


paid or proposed to be paid by any Person pursuant to any  Acquisition  Proposal
relating to the Company (the "Alternative Exercise Price") or (y) the average of
the  closing  price of the shares of Common  Stock on the NYSE at the end of the
regular session,  as reported on the Consolidated  Tape,  Network A for the five
consecutive  trading days ending on and including  the trading date  immediately
preceding  the date on which the Cash  Exercise  Notice is given  (the  "Average
Market Price").  If the  Alternative  Exercise Price includes any property other
than cash, the Alternative Exercise Price shall be the sum of (i) the fixed cash
amount,  if any,  included in the Alternative  Exercise Price plus (ii) the fair
market  value  of such  other  property.  If such  other  property  consists  of
securities with an existing  public trading  market,  the average of the closing
prices (or the average of the closing bid and asked prices if closing prices are
unavailable) for such securities in their principal public trading market on the
five trading days ending five days prior to the date on which the Cash  Exercise
Notice is given shall be deemed to equal the fair market value of such property.
If such other property  includes  anything other than cash or securities with an
existing public trading market,  the Alternative  Exercise Price shall be deemed
to equal the Average  Market Price.  Upon exercise of its right pursuant to this
Section  3(d) and the  receipt  by Parent of the  applicable  cash  amount  with
respect to the Option Shares or the applicable portion thereof,  the obligations
of the  Company to  deliver  Option  Shares  pursuant  to Section  3(e) shall be
terminated  with  respect to the number of Option  Shares  specified in the Cash
Exercise Notice. The Spread shall be appropriately  adjusted, if applicable,  to
give effect to Section 6.

         (e) (i) At any closing  pursuant to Section 3(c)  hereof,  Parent shall
make  payment to the  Company  of the  aggregate  purchase  price for the Option
Shares to be purchased  and the Company  shall  deliver to Parent a  certificate
representing  the purchased  Option Shares,  registered in the name of Parent or
its  designee  and (ii) at any closing  pursuant  to Section  3(d)  hereof,  the
Company will deliver to Parent cash in an amount determined  pursuant to Section
3(d) hereof.  Any payment  made by Parent to the  Company,  or by the Company to
Parent, pursuant to this Agreement shall be made by wire transfer of immediately
available funds to a bank designated by the party receiving such funds, provided
that the  failure or refusal by the  Company to  designate  such a bank  account
shall not preclude  Parent from  exercising the Stock Option.  If at the time of
the  issuance of Option  Shares  pursuant to the  exercise of the Stock  Option,
Company Rights or any similar securities are outstanding, then the Option Shares
issued pursuant to such exercise shall be accompanied by  corresponding  Company
Rights or such similar securities.

         (f) Certificates for Common Stock delivered at the closing described in
Section 3(c) hereof shall be endorsed with a restrictive legend which shall read
substantially as follows:

         "The transfer of the shares  represented by this certificate is subject
         to resale  restrictions  arising under the  Securities  Act of 1933, as
         amended. The shares represented by this certificate are also subject to
         repurchase by the Issuer  pursuant to the Stock Option  Agreement dated
         as of October 15, 2000, a copy of which  agreement may be obtained upon
         request from the Issuer."

                                      -3-


         It is  understood  and agreed that the above legend shall be removed by
delivery of substitute certificate(s) without this reference (i) if Parent shall
have delivered to the Company a copy of a no-action letter from the staff of the
Securities and Exchange Commission, or a written opinion of counsel, in form and
substance reasonably satisfactory to the Company, to the effect that such legend
is not  required  for  purposes  of, or resale may be  effected  pursuant  to an
exemption from registration under, the Securities Act or (ii) in connection with
any sale registered  under the Securities Act. In addition,  these  certificates
shall bear any other legend as may be required by applicable law.

         (g) At any time  following  the exercise by Parent of the Stock Option,
the Company shall have the right, within 5 business days after written notice to
Parent,  to  purchase  for cash all of the  Option  Shares  received  by  Parent
pursuant to this  Agreement at a purchase price per share equal to the higher of
(x) the  Alternative  Exercise  Price or (y) the Average  Market  Price.  At any
closing  pursuant to this Section 3(g), the Company shall make payment to Parent
of the aggregate purchase price for the Option Shares to be purchased and Parent
shall deliver to the Company a  certificate  representing  the purchased  Option
Shares.

         Section 4.  Representations and Warranties of the Company.  The Company
hereby represents and warrants to Parent as follows:

         (a) The Company is a corporation  duly  incorporated,  validly existing
and in good  standing  under the laws of the State of Delaware.  The  execution,
delivery and  performance by the Company of this Agreement and the  consummation
by the  Company  of the  transactions  contemplated  hereby  (i) are  within the
Company's  corporate  powers,  (ii) have been duly  authorized  by all necessary
corporate  action,  (iii) require no action by or in respect of, or filing with,
any  governmental  body,  agency or  official,  except for  compliance  with any
applicable  requirements  of the HSR Act, the Exchange Act, the Securities  Act,
and laws, rules and regulations in foreign jurisdictions  governing antitrust or
merger control matters (iv) assuming  compliance with the matters referred to in
clause (iii), do not contravene,  or constitute a violation of, any provision of
applicable law or regulation or of the certificate of  incorporation  or by-laws
of the Company or of any judgment,  injunction, order or decree binding upon the
Company or any of its Subsidiaries, (v) do not and will not constitute a default
under or give rise to a right of  termination,  cancellation  or acceleration of
any right or obligation of the Company or any of its  Subsidiaries  or to a loss
of any benefit to which the Company or any of its Subsidiaries is entitled under
any provision of any agreement,  contract or other  instrument  binding upon the
Company or any of its  Subsidiaries or any license,  franchise,  permit or other
similar  authorization held by the Company or any of its Subsidiaries,  and (vi)
do not and will not  result in the  creation  or  imposition  of any Lien on any
asset of the Company or any of its Subsidiaries, except for such contraventions,
conflicts  or  violations  referred  to in clause  (iv) or  defaults,  rights of
termination,  cancellation  or  acceleration,  or losses or Liens referred to in
clauses (v) and (vi) that would not,  individually  or in the aggregate,  have a
Material  Adverse  Effect on the Company.  This Agreement has been duly executed
and delivered by the Company and  constitutes  a valid and binding  agreement of
the Company.



                                      -4-


         (b) The Company has taken all necessary  corporate  action to authorize
and  reserve  and to permit it to issue,  and at all times from the date  hereof
until such time as the  obligation to deliver Option Shares upon the exercise of
the Stock Option  terminates,  will have reserved for issuance upon any exercise
of the Stock  Option,  the number of Option  Shares  subject to the Stock Option
(less the number of Option Shares previously issued upon any partial exercise of
the Stock Option).  All of the Option Shares to be issued  pursuant to the Stock
Option  have been duly  authorized  and,  upon  issuance  and  delivery  thereof
pursuant to this Agreement, will be duly authorized,  validly issued, fully paid
and  nonassessable,  and will be delivered free and clear of all claims,  liens,
charges,  encumbrances and security  interests (other than those created by this
Agreement).  Option  Shares issued upon exercise of the Stock Option will not be
subject to any  preemptive  or similar  rights.  The Board of  Directors  of the
Company  has  resolved  to, and the Company  promptly  after  execution  of this
Agreement will, take all necessary action to render the Company Rights Agreement
inapplicable  to the grant or exercise of the Stock Option and the  transactions
contemplated  hereby.  The  Board of  Directors  of the  Company  has  taken all
necessary  action  to  render  section  203 of the  Delaware  Law,  or any other
antitakeover  statute or similar  statute or regulation,  and the  supermajority
voting provisions of Article XIII of the Company's  certificate of incorporation
and Article VII of the Company's by-laws  inapplicable to the acquisition of the
Option Shares pursuant to this Agreement.

         Section 5.  Representations  and  Warranties  of Parent.  Parent hereby
represents and warrants to the Company as follows:  Parent is a corporation duly
incorporated,  validly existing and in good standing under the laws of the State
of Delaware. The execution, delivery and performance by Parent of this Agreement
and the  consummation  of the  transactions  contemplated  hereby (i) are within
Parent's  corporate  powers and (ii) have been duly  authorized by all necessary
corporate action.  The Option Shares acquired by Parent upon the exercise of the
Stock Option will not be, and the Stock Option is not being,  acquired by Parent
with the intention of making a public  distribution  thereof.  Neither the Stock
Option nor the Option Shares  acquired upon exercise of the Stock Option will be
sold or otherwise disposed of by Parent except in compliance with the Securities
Act.  This  agreement  has been  duly  executed  and  delivered  by  Parent  and
constitutes a valid and binding agreement of Parent.

         Section 6. Adjustment upon Changes in Capitalization or Merger.

         (a) In the  event of any  change  in the  outstanding  shares of Common
Stock by reason of a stock dividend, stock split, reverse stock split, split-up,
merger, consolidation,  recapitalization,  combination,  conversion, exchange of
shares, extraordinary or liquidating dividend or similar transaction which would
affect  Parent's rights  hereunder,  the type and number of shares or securities
purchasable  upon the exercise of the Stock Option and the Exercise  Price shall
be adjusted  appropriately,  and proper provision will be made in the agreements
governing  such  transaction,  as shall fully  preserve  the  economic  benefits
provided  hereunder  to  Parent  and  the  full  satisfaction  of the  Company's
obligations  hereunder.  In no event shall the number of shares of Common  Stock
subject to the Stock Option exceed 19.9% of the number of shares of Common Stock
issued and  outstanding  at the time of exercise  (without  giving effect to any
shares subject or issued pursuant to the Stock Option).



                                      -5-


         (b)  Without  limiting  the  foregoing,  whenever  the number of Option
Shares  purchasable upon exercise of the Stock Option is adjusted as provided in
this Section 6, the Exercise Price shall be adjusted by multiplying the Exercise
Price by a  fraction,  the  numerator  of which is equal to the number of Option
Shares purchasable prior to the adjustment and the denominator of which is equal
to the number of Option Shares purchasable after the adjustment.

         (c) Without  limiting or altering the parties'  rights and  obligations
under  the  Merger  Agreement,  in the event  that the  Company  enters  into an
agreement (i) to consolidate with or merge into any Person, other than Parent or
one of its Subsidiaries, and the Company will not be the continuing or surviving
corporation in such  consolidation or merger,  (ii) to permit any Person,  other
than  Parent  or one of its  Subsidiaries,  to merge  into the  Company  and the
Company will be the continuing or surviving corporation,  but in connection with
such merger,  the shares of Common Stock  outstanding  immediately  prior to the
consummation of such merger will be changed into or exchanged for stock or other
securities of the Company or any other Person or cash or any other property,  or
the shares of Common Stock outstanding  immediately prior to the consummation of
such merger will, after such merger,  represent less than 50% of the outstanding
voting securities of the merged company,  or (iii) to sell or otherwise transfer
all or substantially  all of its assets to any Person,  other than Parent or one
of its Subsidiaries,  then, and in each such case, the agreement  governing such
transaction  will make proper  provision so that the Stock Option will, upon the
consummation of any such transaction and upon the terms and conditions set forth
herein,  be converted  into, or exchanged  for, an option with  identical  terms
appropriately  adjusted  to  acquire  the  number  and  class of shares or other
securities  or  property  that Parent  would have  received in respect of Option
Shares  had  the  Stock  Option  been  exercised   immediately   prior  to  such
consolidation,  merger,  sale  or  transfer  or the  record  date  therefor,  as
applicable,  and shall make any other necessary  adjustments.  The Company shall
take such steps in connection with such  consolidation,  merger,  liquidation or
other  such  transaction  as may be  reasonably  necessary  to  assure  that the
provisions hereof shall thereafter apply as nearly as possible to any securities
or property thereafter deliverable upon exercise of the Stock Option.

         Section 7.  Further Assurances; Remedies.
                     ----------------------------

         (a) The  Company  agrees  to  maintain,  free from  preemptive  rights,
sufficient  authorized  but unissued or treasury  shares of Common Stock so that
the Stock Option may be fully  exercised  without  additional  authorization  of
Common Stock after giving  effect to all other  options,  warrants,  convertible
securities and other rights of third parties to purchase  shares of Common Stock
from the Company,  and to issue the appropriate number of shares of Common Stock
pursuant to the terms of this  Agreement.  All of the Option Shares to be issued
pursuant to the Stock  Option,  upon issuance and delivery  thereof  pursuant to
this  Agreement,  will  be duly  authorized,  validly  issued,  fully  paid  and
non-assessable,  and will be  delivered  free and  clear of all  claims,  liens,
charges,  encumbrances and security  interests (other than those created by this
Agreement).

         (b) The  Company  agrees  not to  avoid or seek to  avoid  (whether  by
charter amendment or through reorganization,  consolidation, merger, issuance of
rights,  dissolution  or



                                      -6-


sale of assets,  or by any other voluntary act) the observance or performance of
any of the  covenants,  agreements  or  conditions  to be observed or  performed
hereunder by the Company.

         (c) The Company  agrees that promptly after the occurrence of a Company
Trigger  Event it shall take all  actions  as may from time to time be  required
(including (i) complying with all applicable premerger  notification,  reporting
and  waiting  period  requirements  under the HSR Act and (ii) in the event that
prior  notification  to or approval  of any other  regulatory  authority  in the
United  States  or  elsewhere  is  necessary  before  the  Stock  Option  may be
exercised, complying with its obligations thereunder and cooperating with Parent
in preparing and processing the required  notices or  applications)  in order to
permit Parent to exercise the Stock Option and purchase  Option Shares  pursuant
to such exercise.

         (d) The parties agree that Parent would be  irreparably  damaged if for
any  reason  the  Company  failed to issue any of the  Option  Shares  (or other
securities or property  deliverable  pursuant to Section 6 hereof) upon exercise
of the  Stock  Option or to  perform  any of its other  obligations  under  this
Agreement,  and that Parent  would not have an adequate  remedy at law for money
damages  in such  event.  Accordingly,  Parent  shall be  entitled  to  specific
performance and injunctive and other equitable relief to enforce the performance
of this  Agreement by the Company.  Accordingly,  if Parent should  institute an
action or proceeding seeking specific  enforcement of the provisions hereof, the
Company hereby waives the claim or defense that Parent has an adequate remedy at
law and hereby agrees not to assert in any such action or  proceeding  the claim
or defense that such a remedy at law exists. The Company further agrees to waive
any  requirements  for the  securing or posting of any bond in  connection  with
obtaining any such equitable relief.  This provision is without prejudice to any
other rights that Parent may have against the Company for any failure to perform
its obligations under this Agreement.

         Section 8. Listing of Option Shares. Promptly after the occurrence of a
Company Trigger Event and from time to time thereafter if necessary, the Company
will apply to list all of the Option  Shares  subject to the Stock Option on the
NYSE and will use its reasonable best efforts to obtain approval of such listing
as soon as practicable.

         Section 9. Registration of the Option Shares.
                    ---------------------------------

         (a) If,  within two years of the exercise of the Stock  Option,  Parent
requests the Company in writing to register  under the Securities Act any of the
Option Shares received by Parent hereunder,  the Company will use its reasonable
best  efforts to cause the  offering of the Option  Shares so  specified in such
request  to be  registered  as soon as  practicable  so as to permit the sale or
other  distribution by Parent of the Option Shares specified in its request (and
to keep such  registration  in effect for a period of at least 90 days),  and in
connection  therewith  the  Company  shall  prepare  and  file  as  promptly  as
reasonably possible (but in no event later than 60 days from receipt of Parent's
request)  a  registration  statement  under the  Securities  Act to effect  such
registration on an appropriate  form,  which would permit the sale of the Option
Shares by Parent in accordance with the plan of disposition  specified by Parent
in its request.  The Company shall not be obligated to make  effective more than
two  registration  statements  pursuant  to the  foregoing  sentence;  provided,
however,  that the Company may postpone the filing of a


                                      -7-


registration  statement relating to a registration  request by Parent under this
Section 9 for a period  of time  (not in excess of 90 days) if in the  Company's
reasonable,  good faith judgment (i) such filing would require the disclosure of
material  information  that the  Company  has a bona fide  business  purpose for
preserving  as  confidential  or (ii) the sale of Option  Shares by Parent would
materially interfere with any pending or anticipated  acquisition,  financing or
transaction involving the Company or its Subsidiaries (but in no event shall the
Company  exercise  such  postponement  right more than once in any  twelve-month
period).

         (b) The Company  shall  notify  Parent in writing not less than 10 days
prior to filing a registration  statement under the Securities Act (other than a
filing on Form S-4 or S-8 or any  successor  form) with respect to any shares of
Common Stock. If Parent wishes to have any portion of its Option Shares included
in such  registration,  it shall  advise the  Company in writing to that  effect
within two business days following receipt of such notice,  and the Company will
thereupon  include  the  number of  Option  Shares  indicated  by Parent in such
registration;  provided  that if the  managing  underwriter(s)  of the  offering
pursuant to such registration statement advise the Company that in their opinion
the  number  of  shares  of  Common  Stock  requested  to be  included  in  such
registration exceeds the number which can be sold in such offering,  the Company
shall only include in such  registration  such number or dollar amount of Option
Shares which, in the good faith opinion of the managing  underwriter(s),  can be
sold without materially and adversely affecting such offering.

         (c) All expenses  relating to or in  connection  with any  registration
contemplated  under this  Section 9 and the  transactions  contemplated  thereby
(including all filing,  printing,  reasonable  professional,  roadshow and other
fees and expenses  relating thereto) will be at the Company's expense except for
underwriting  discounts or commissions and brokers' fees. The Company and Parent
agree to enter into a customary  underwriting  agreement with  underwriters upon
such  terms  and  conditions  as  are  customarily   contained  in  underwriting
agreements with respect to secondary distributions.  The Company shall indemnify
Parent,  its officers,  directors,  agents,  other  controlling  persons and any
underwriters  retained  by Parent in  connection  with such sale of such  Option
Shares  in  the  customary  way,  and  shall  agree  to  customary  contribution
provisions  with such  persons,  with  respect  to claims,  damages,  losses and
liabilities (and any expenses relating thereto) arising (or to which Parent, its
officers,  directors,  agents,  other controlling persons or underwriters may be
subject) in connection with any such offer or sale under the federal  securities
laws or otherwise,  except for information furnished in writing by Parent or its
underwriters to the Company.  Parent and its underwriters,  respectively,  shall
indemnify the Company to the same extent with respect to  information  furnished
in writing to the Company by Parent and such underwriters, respectively.

         Section 10.  Miscellaneous.
                      -------------

         (a) Extension of Exercise Periods.  The periods during which Parent may
exercise its rights under  Sections 2 and 3 hereof,  or the Company may exercise
its  rights  under  Section  2(g),  shall be  extended  in each such case at the
request of Parent to the extent  necessary  to avoid  liability  by Parent under
Section 16(b) of the Exchange Act by reason of such exercise.

                                      -8-


         (b) Amendments;  Entire Agreement.  This Agreement may not be modified,
amended,  altered or  supplemented,  except upon the execution and delivery of a
written agreement executed by the parties hereto. This Agreement,  together with
the Merger Agreement  (including any exhibits and schedules  thereto),  contains
the entire  agreement  between  the parties  hereto with  respect to the subject
matter  hereof  and  supersedes  all prior and  contemporaneous  agreements  and
understandings, oral or written, with respect to such transactions.

         (c) Notices.  All notices, requests and other communications to either
             -------
party hereunder shall be inwriting (including facsimile or similar writing) and
shall be given,

         if to Parent, to:

                  Harvey D. Hinman, Esq.
                  Vice President and General Counsel
                  Chevron Corporation
                  575 Market Street
                  San Francisco, California  94105
                  Facsimile No.: (415) 894-6017

         with copies to:

                  Alfred L. Pepin, Esq.
                  1156 Mee Lane
                  St. Helena, California 94574
                  Facsimile No.: (707) 967-0551

         and

                  Arthur Fleischer, Jr., Esq.
                  Gary P. Cooperstein, Esq.
                  Fried, Frank, Harris, Shriver & Jacobson
                  One New York Plaza
                  New York, NY 10004-1980
                  Facsimile No.: (212) 859-4000

         and

                  Terry M. Kee, Esq.
                  Rodney R. Peck, Esq.
                  Pillsbury Madison & Sutro LLP
                  50 Fremont Street
                  San Francisco, California 94105
                  Facsimile No.: (415) 983-1200




                                      -9-


         if to the Company, to:

                  William M. Wicker
                  Senior Vice President
                  Texaco Inc.
                  2000 Westchester Avenue
                  White Plains, New York  10650
                  Facsimile No.: (914) 253-4280

         with copies to:

                  Deval Patrick, Esq.
                  General Counsel and Vice President
                  Texaco Inc.
                  2000 Westchester Avenue
                  White Plains, New York  10650
                  Facsimile No.: (914) 253-4477

         and

                  Dennis S. Hersch, Esq.
                  Ulrika Ekman, Esq.
                  Davis Polk & Wardwell
                  450 Lexington Avenue
                  New York, NY  10017
                  Facsimile No.: (212) 450-4800


or to such  other  address or  facsimile  number as either  party may  hereafter
specify for the purpose by notice to the other party  hereto.  Each such notice,
request or other  communication  shall be effective  (i) if given by  facsimile,
when such  facsimile is transmitted  to the facsimile  number  specified in this
Section and the appropriate facsimile  confirmation is received or (ii) if given
by any other means, when delivered at the address specified in this Section.

         (d) Expenses.  Each party hereto shall pay its own expenses incurred in
connection with this Agreement, except as otherwise specifically provided herein
and without limiting anything contained in the Merger Agreement.

         (e) Severability.  If any term,  provision,  covenant or restriction of
this Agreement is held to be invalid,  void or  unenforceable,  the remainder of
the terms, provisions, covenants and restrictions of this Agreement shall remain
in  full  force  and  effect  and  shall  in no way  be  affected,  impaired  or
invalidated.

         (f) Governing Law;  Jurisdiction.  This Agreement  shall be governed by
and  construed  in  accordance  with the laws of the State of  Delaware  without
regard to principles of conflicts of law. Any suit, action or proceeding seeking
to  enforce  any  provision  of,  or based on



                                      -10-


any  matter  arising  out  of or in  connection  with,  this  Agreement  or  the
transactions  contemplated  hereby may be brought in any  federal or state court
located in the State of Delaware, and each of the parties hereby consents to the
jurisdiction of such courts (and of the appropriate  appellate courts therefrom)
in any such suit,  action or proceeding and irrevocably  waives,  to the fullest
extent permitted by law, any objection which it may now or hereafter have to the
laying of the venue of any such suit,  action or proceeding in any such court or
that any such suit,  action or proceeding which is brought in any such court has
been  brought in an  inconvenient  forum.  Process  in any such suit,  action or
proceeding may be served on any party  anywhere in the world,  whether within or
without the jurisdiction of any such court. Without limiting the foregoing, each
party agrees that service of process on such party as provided in Section  10(c)
hereof shall be deemed effective service of process on such party.

         (g) Waiver of Jury Trial. EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY
WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF
OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

         (h) Counterparts.  This Agreement may be executed in two or more
             ------------
counterparts, each of which shallbe an original, but all of which together shall
constitute one and the same agreement.

         (i) Headings.  The section headings herein are for convenience only and
             --------
 shall not affect the construction hereof.

         (j) Assignment.  This Agreement shall be binding upon each party hereto
and such party's successors and assigns.  This Agreement shall not be assignable
by the Company,  but may be assigned by Parent in whole or in part to any direct
or indirect wholly-owned subsidiary of Parent, provided that Parent shall remain
liable for any obligations so assigned.

         (k) Survival.  All representations,  warranties and covenants contained
herein  shall  survive the  execution  and  delivery of this  Agreement  and the
consummation of the transactions contemplated hereby.

         (l) Time of the Essence.  The parties agree that time shall be of the
             -------------------
essence in the performance of obligations hereunder.

         (m) Public Announcement.  Parent and the Company will consult with each
other  before  issuing  any press  release or making any public  statement  with
respect to this Agreement and the transactions contemplated hereby and shall not
issue any such press release or make any such public statement without the prior
consent  of  the  other  party,  which  shall  not  be  unreasonably   withheld.
Notwithstanding the foregoing, any such press release or public statement as may
be  required  by  applicable  law or any  listing  agreement  with any  national
securities  exchange,  may be issued  prior to such  consultation,  if the party
making such release or statement has used its reasonable efforts to consult with
the other party.



                                      -11-


         Section 11.  Profit Limitation.
                      -----------------

         (a) Notwithstanding any other provision of this Agreement or the Merger
Agreement,  in no event shall  Parent's  Total Profit (as defined  below) exceed
$1,100,000,000  (the "Maximum  Amount")  and, if it otherwise  would exceed such
Maximum  Amount,  Parent at its sole  election  may (i) pay cash to the Company,
(ii) deliver to the Company for cancellation Option Shares previously  purchased
by Parent, or (iii) any combination  thereof, so that Parent's actually realized
Total Profit (as defined below) shall not exceed the Maximum Amount after taking
into account the foregoing actions.

         (b)  Notwithstanding  any other provision of this Agreement,  the Stock
Option may not be exercised  for a number of Option  Shares as would,  as of the
date of the Stock Exercise Notice or Cash Exercise Notice, as applicable, result
in a Notional  Total Profit (as defined  below) of more than the Maximum  Amount
and, if exercise of the Stock  Option  otherwise  would  result in the  Notional
Total Profit exceeding such amount, Parent, at its discretion,  may (in addition
to any of the actions  specified in Section  11(a) above)  increase the Exercise
Price for that number of Option Shares set forth in the Stock Exercise Notice or
Cash Exercise Notice, as applicable, so that the Notional Total Profit shall not
exceed  the  Maximum  Amount;  provided,  that  nothing in this  sentence  shall
restrict  any exercise of the Stock Option  permitted  hereby on any  subsequent
date at the Exercise Price set forth in Section 2 hereof.

         (c) As used herein,  the term "Total  Profit"  shall mean the aggregate
amount (before taxes) of the following: (i) the cash amount actually received by
Parent  pursuant to Section 10.5 of the Merger  Agreement  less any repayment by
Parent to the Company pursuant to Section 11(a)(i) hereof, (ii) (x) the net cash
amounts or the fair market value of any property  received by Parent pursuant to
the sale of Option  Shares  (or of any other  securities  into or for which such
Option Shares are converted or exchanged),  less (y) Parent's purchase price for
such  Option  Shares  (or other  securities)  plus (iii) the  aggregate  amounts
received by Parent pursuant to Section 3(d).

         (d) As used herein,  the term  "Notional  Total Profit" with respect to
any number of Option Shares as to which Parent may propose to exercise the Stock
Option  shall  mean the  Total  Profit  determined  as of the date of the  Stock
Exercise Notice or Cash Exercise Notice, as applicable,  assuming that the Stock
Option was  exercised on such date for such number of Option Shares and assuming
that such  Option  Shares,  together  with all other  Option  Shares  previously
acquired upon exercise of the Stock Option and held by Parent and its affiliates
as of such  date,  were sold for cash at the  closing  price on the NYSE for the
Common  Stock as of the close of  business  on the  preceding  trading day (less
customary brokerage commissions).



                                      -12-


         IN WITNESS  WHEREOF,  the Company and Parent have caused this Agreement
to be duly executed as of the day and year first above written.


                     TEXACO INC.


                     By:             /s/ PETER I. BIJUR
                           -------------------------------------------
                           Name:         Peter I. Bijur
                           Title       Chairman of the Board and
                                       Chief Executive Officer

                     CHEVRON CORPORATION


                     By:             /s/ DAVID J. O'REILLY
                           -------------------------------------------
                           Name:         David J. O'Reilly
                           Title:      Chairman of the Board and
                                       Chief Executive Officer

                                      -13-