UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 11-K


                     ANNUAL REPORT PURSUANT TO SECTION 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                   For the fiscal year ended December 31, 2001






                         Commission File Number 1-13175






                      VALERO ENERGY CORPORATION THRIFT PLAN


                            VALERO ENERGY CORPORATION
                                One Valero Place
                            San Antonio, Texas 78212















                      VALERO ENERGY CORPORATION THRIFT PLAN

                                      Index

                                                                            Page
                                                                            ----

Reports of Independent Auditors.............................................   3

Statements of Net Assets Available for
    Benefits as of December 31, 2001 and 2000...............................   5

Statements of Changes in Net Assets Available
    for Benefits for the Years Ended December 31, 2001 and 2000.............   6

Notes to Financial Statements...............................................   7

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)
    as of December 31, 2001.................................................  17

Signature...................................................................  18

Consent of Independent Auditors.............................................  19

Notice Regarding Consent of Arthur Andersen LLP.............................  20








                                       2





                         REPORT OF INDEPENDENT AUDITORS


To the Administrative Committee of the
   Valero Energy Corporation Thrift Plan

We have audited the accompanying  statement of net assets available for benefits
of Valero Energy Corporation Thrift Plan as of December 31, 2001 and the related
statement  of changes in net assets  available  for  benefits  for the year then
ended.  These  financial   statements  are  the  responsibility  of  the  Plan's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements based on our audit.

We conducted our audit in accordance with auditing standards  generally accepted
in the United States. Those standards require that we plan and perform the audit
to obtain reasonable  assurance about whether the financial  statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting  the amounts and  disclosures in the financial  statements.  An audit
also includes assessing the accounting principles used and significant estimates
made by  management,  as well as  evaluating  the  overall  financial  statement
presentation.  We believe  that our audit  provides a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the net assets available for benefits of the Plan as of
December 31, 2001 and the changes in its net assets  available  for benefits for
the year then ended, in conformity with accounting principles generally accepted
in the United States.

Our audit was  performed  for the  purpose  of  forming  an  opinion on the 2001
financial statements taken as a whole. The accompanying supplemental schedule of
assets (held at end of year) as of December  31, 2001 is presented  for purposes
of additional  analysis and is not a required  part of the financial  statements
but is supplementary information required by the Department of Labor's Rules and
Regulations for Reporting and Disclosure  under the Employee  Retirement  Income
Security Act of 1974. This  supplemental  schedule is the  responsibility of the
Plan's management.  The supplemental schedule has been subjected to the auditing
procedures applied in our audit of the financial statements and, in our opinion,
is  fairly  stated  in all  material  respects  in  relation  to  the  financial
statements taken as a whole.

                                                           /s/ ERNST & YOUNG LLP

San Antonio, Texas
June 26, 2002



                                       3




THIS IS A COPY OF THE AUDIT REPORT  PREVIOUSLY  ISSUED BY ARTHUR ANDERSEN LLP IN
CONNECTION WITH THE VALERO ENERGY  CORPORATION THRIFT PLAN'S FILING ON FORM 11-K
FOR THE YEAR ENDED DECEMBER 31, 2000. THIS AUDIT REPORT HAS NOT BEEN REISSUED BY
ARTHUR  ANDERSEN LLP IN  CONNECTION  WITH THIS FILING ON FORM 11-K.  SEE EXHIBIT
23.2 FOR FURTHER DISCUSSION.


REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Administrative Committee of the
Valero Energy Corporation Thrift Plan:

We have audited the  accompanying  statements  of net assets  available for plan
benefits of the Valero  Energy  Corporation  Thrift Plan as of December 31, 2000
and 1999, and the related  statement of changes in net assets available for plan
benefits for the year ended December 31, 2000.  These  financial  statements and
the supplemental schedule referred to below are the responsibility of the Thrift
Plan's administrative  committee. Our responsibility is to express an opinion on
these financial statements and supplemental schedule based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States. Those standards require that we plan and perform the audit
to obtain reasonable  assurance about whether the financial  statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting  the amounts and  disclosures in the financial  statements.  An audit
also includes assessing the accounting principles used and significant estimates
made by  management,  as well as  evaluating  the  overall  financial  statement
presentation.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects,  the net assets available for plan benefits of the Valero
Energy Corporation Thrift Plan as of December 31, 2000 and 1999, and the changes
in its net assets  available for plan  benefits for the year ended  December 31,
2000, in conformity with accounting  principles generally accepted in the United
States.

Our  audits  were  made for the  purpose  of  forming  an  opinion  on the basic
financial statements taken as a whole. The supplemental schedule of assets (held
at end of year) as of December 31, 2000, is presented for purposes of additional
analysis and is not a required  part of the basic  financial  statements  but is
supplementary  information  required  by the  Department  of  Labor's  Rules and
Regulations for Reporting and Disclosure  under the Employee  Retirement  Income
Security  Act of 1974.  The  supplemental  schedule  has been  subjected  to the
auditing procedures applied in the audits of the basic financial statements and,
in our opinion,  is fairly  stated in all  material  respects in relation to the
basic financial statements taken as a whole.

                                                        /s/  ARTHUR ANDERSEN LLP

San Antonio, Texas
June 26, 2001



                                       4





                      VALERO ENERGY CORPORATION THRIFT PLAN

                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS



                                                             December 31,
                                                             ------------
                                                         2001           2000
                                                         ----           ----
Assets:
Investments......................................  $ 306,397,925   $ 274,368,874
                                                     -----------     -----------

Receivables:
    Interest and dividends.......................         89,936          21,528
    Due from brokers for securities sold.........         51,971         870,324
                                                     -----------     -----------
                                                         141,907         891,852
                                                     -----------     -----------

Cash.............................................          3,247          15,921
                                                     -----------     -----------

Net assets available for benefits................  $ 306,543,079   $ 275,276,647
                                                     ===========     ===========

                       See Notes to Financial Statements.



                                       5




                      VALERO ENERGY CORPORATION THRIFT PLAN

           STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS


                                                     Years Ended December 31,
                                                     ------------------------
                                                   2001                  2000
                                                   ----                  ----

Additions to net assets:
Investment income:
    Interest income......................    $   3,078,480        $   2,595,567
    Dividend income......................        3,199,261            9,536,475
                                               -----------          -----------
                                                 6,277,741           12,132,042
                                               -----------          -----------
Contributions:
    Employee ............................       24,912,366           21,364,745
    Employer ............................       13,364,333            8,119,871
                                               -----------          -----------
                                                38,276,699           29,484,616
                                               -----------          -----------

Asset transfers in from other plans:
   El Paso employee savings plan.........        6,557,174                    -
   Huntway 401(k) plan...................        5,704,024                    -
   ExxonMobil employee savings plan......           37,709           13,651,000
                                               -----------          -----------
                                                12,298,907           13,651,000
                                               -----------          -----------

    Total additions......................       56,853,347           55,267,658
                                               -----------          -----------

Deductions from net assets:
Withdrawals by participants..............       13,392,586           19,545,149
Administrative expenses..................          106,931              162,245
                                               -----------          -----------

    Total deductions.....................       13,499,517           19,707,394
                                               -----------          -----------

Net appreciation (depreciation) in fair
    value of investments.................      (12,087,398)          11,208,332
                                               -----------          -----------

Net increase in net assets available
    for benefits.........................       31,266,432           46,768,596

Net assets available for benefits:
    Beginning of year....................      275,276,647          228,508,051
                                               -----------          -----------

    End of year..........................    $ 306,543,079        $ 275,276,647
                                               ===========          ===========

                       See Notes to Financial Statements.



                                       6




                      VALERO ENERGY CORPORATION THRIFT PLAN

                          NOTES TO FINANCIAL STATEMENTS


1.  Description of the Plan

As used in this report, the term "Valero" may refer, depending upon the context,
to Valero Energy Corporation,  one or more of its consolidated subsidiaries,  or
all of them taken as a whole.

Valero Energy Corporation is a publicly held refining and marketing company with
over 22,000  employees.  Valero owns and  operates 12  refineries  in the United
States and Canada  with a combined  throughput  capacity  of  approximately  1.9
million barrels per day. Valero markets its refined  products  through a network
of  approximately  4,600 retail  outlets in the United States and eastern Canada
under various brand names including  Diamond Shamrock (R),  Ultramar (R), Valero
(R), Beacon (R) and Total (R). In addition,  Valero owns a pipeline and terminal
operation that  complements  its refining and marketing  operations in the Texas
Gulf Coast and Mid-Continent  regions of the United States. Valero owns 73.6% of
Valero  L.P., a master  limited  partnership  that owns and  operates  crude oil
pipelines,  refined product  pipelines and refined  product  terminals in Texas,
Oklahoma, New Mexico and Colorado.

Valero's  common  stock trades on the New York Stock  Exchange  under the symbol
"VLO" and Valero L.P.'s  common units also trade on the New York Stock  Exchange
under the symbol "VLI."

The  following  description  of the Valero Energy  Corporation  Thrift Plan (the
Thrift Plan) provides only general information. Participants should refer to the
Thrift Plan document for a complete description of the Thrift Plan's provisions.

General:
The Thrift Plan is a qualified  profit-sharing  plan covering eligible employees
of Valero in which participants' interests in Valero common stock are registered
under the  Securities  Act of 1933. The Thrift Plan is subject to the provisions
of the Employee Retirement Income Security Act of 1974 (ERISA).

An  administrative   committee,   consisting  of  persons  selected  by  Valero,
administers the Thrift Plan. The members of the  administrative  committee serve
without compensation for services in that capacity.  Merrill Lynch Trust Company
of Texas is the trustee under the Thrift Plan and has custody of the  securities
and  investments  of the Thrift Plan  through a trust (the  Thrift Plan  Trust).
Merrill Lynch, Pierce,  Fenner & Smith Incorporated is the record keeper for the
Thrift Plan.

Plan Mergers and Acquisitions:
During the second  quarter of 2000,  Valero  completed the  acquisition of Exxon
Mobil Corporation's  Benicia,  California refinery and Exxon-branded  California
retail assets (the Benicia Acquisition).  Former ExxonMobil refinery and certain
retail  employees who became  employees of Valero in connection with the Benicia
Acquisition  became  eligible to  participate in the Thrift Plan on May 16, 2000
and June 16, 2000, respectively, under the same service requirements as required
for other  Valero  employees,  with  service  including  prior  employment  with
ExxonMobil.  These  employees  could elect to transfer  their  balances from the
ExxonMobil employee savings plan into the Thrift Plan or maintain their balances
in the ExxonMobil  plan.  Amounts  transferred from the ExxonMobil plan into the
Thrift  Plan  are  included  in  asset  transfers  in from  other  plans  in the
statements of changes in net assets available for benefits.




                                       7




                      VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)


Effective  June  1,  2001,   Valero   completed  the   acquisition  of  El  Paso
Corporation's  Corpus  Christi,  Texas  refinery and related  product  logistics
business.  Former El Paso refinery  employees who became  employees of Valero in
connection with the acquisition  began  participation in the Thrift Plan on June
1, 2001, while  participation dates of former El Paso logistics employees varied
depending on when they became  employees  of Valero.  On the  beginning  date of
their  participation  in the Thrift Plan, all former El Paso employees  received
credit for eligibility and vesting  purposes for all prior service with El Paso.
These employees  became eligible to make  contributions to the Thrift Plan after
August 1, 2001 and  could  elect to  transfer  their  balances  from the El Paso
employee  savings plan or maintain their  balances in the El Paso plan.  Amounts
transferred  from the El Paso plan into the Thrift  Plan are  included  in asset
transfers  in from  other  plans  in the  statement  of  changes  in net  assets
available for benefits for the year ended December 31, 2001.

Also  effective  June 1,  2001,  Valero  completed  the  acquisition  of Huntway
Refining  Company,  a leading supplier of asphalt in California.  Former Huntway
employees  who became  employees of Valero in  connection  with the  acquisition
began  participation in the Thrift Plan and were eligible to make  contributions
on June 1, 2001, and received credit for  eligibility  and vesting  purposes for
all prior service with Huntway.  Effective September 1, 2001, the Huntway 401(k)
plan was merged into the Thrift Plan.  The net assets of the Huntway 401(k) plan
are included in asset  transfers in from other plans in the statement of changes
in net assets available for benefits for the year ended December 31, 2001.

On December 31, 2001,  Valero  completed  its  acquisition  of Ultramar  Diamond
Shamrock  Corporation (UDS). Under the terms of the acquisition  agreement,  UDS
shareholders  (excluding  certain UDS benefit plan participants)  received,  for
each share of UDS common stock they held, at their election, cash, Valero common
stock or a combination  of cash and Valero  common stock.  Based on the exchange
election results,  UDS' shareholders  electing Valero shares received,  for each
share of UDS common  stock,  0.9265  shares of Valero common stock and $16.32 in
cash.  Shareholders electing cash and non-electing  shareholders received $49.47
in cash for each  share of UDS  common  stock.  Based on the  above,  the  total
consideration  paid by Valero to UDS shareholders  included  approximately  $2.1
billion in cash and  approximately  45.9 million  shares of Valero common stock.
Valero accounted for the UDS acquisition using the purchase method.  See note 9,
"Subsequent Events".

Participation:
Participation  in the Thrift Plan is voluntary  and is open to Valero  employees
who become eligible to participate  upon the completion of 30 days of continuous
service.  However,  retail  store  employees  and former UDS  employees  are not
eligible to  participate  in the Thrift Plan as they are eligible to participate
in other plans  sponsored by Valero.  Employees are eligible to  participate  in
Valero's  employer  matching  contributions  after  completion  of one  year  of
continuous service.

Continuous  service  begins  the  first day for  which an  employee  is paid and
terminates on the date of the employee's retirement,  death or other termination
from  service.  If an employee's  employment  is terminated  and the employee is
subsequently  reemployed within 12 months, the period between the severance from
service  and the  date of  reemployment  is  generally  included  in  continuous
service.  If the employee is not  reemployed  within 12 months,  the employee is
deemed  to have  incurred  a  break  in  service.  Former  participants  who are
reemployed   after  a  break  in  service  are  generally   eligible  to  become
participants immediately following reemployment.

                                       8


                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)


Contributions:
Through December 31, 2001,  participants  could make basic  contributions of not
less than 2% or more  than 8% of their  annual  total  salary  immediately  upon
commencement  of  participation.   In  addition,  participants  making  a  basic
contribution  of 8% could also make a supplemental  contribution of up to 14% of
their  annual total  salary.  Annual  total  salary  represents a  participant's
current base salary including  commissions,  overtime, job upgrade pay and shift
differential  pay, and is not reduced for pretax  contributions for the purchase
of benefits and to  reimbursement  accounts for medical and child care  expenses
under Valero's  FlexPlan  benefits  program and pretax  contributions  under the
Thrift Plan itself.  Effective  November 1, 2000, the Thrift Plan was amended to
provide that bonuses, which previously had been included in annual total salary,
are now not included in annual total salary unless the participant  elects to do
so. Participants may change their basic or supplemental contribution percentages
at any time. In addition, any employee may make rollover contributions.

Participants  elect to make  contributions  to the Thrift  Plan on a  before-tax
and/or after-tax  basis.  Federal income taxes on before-tax  contributions  are
deferred until the time a distribution is made to the participant.  The Internal
Revenue  Code (the  Code)  establishes  an annual  limitation  on the  amount of
individual pre-tax salary deferral contributions.  The limit was $10,500 for the
years ended December 31, 2001 and 2000.

Valero  makes  an  employer  contribution  to the  Thrift  Plan  equal to 75% of
participants'  basic  contributions  up to 8% of their  annual base  salary.  If
Valero's  return on equity for the prior  year is equal to or greater  than 10%,
then Valero's employer  contribution shall equal 100% of the participant's basic
contributions  relating to the participant's annual base salary for the 12-month
period beginning February 1 of the calendar year following the year in which the
10% return is achieved.  Valero's  return on equity for the year ended  December
31, 2000 was greater  than 10%;  therefore,  Valero's  matching  percentage  was
increased from 75% to 100% for the 12-month period beginning February 1, 2001.

Forfeitures:
Valero's employer contributions are reduced by any forfeited non-vested accounts
of  terminated  participants  and  increased  by the  value of  prior  forfeited
non-vested accounts for participants who are rehired within five years from date
of termination.  Valero's  employer  contributions  are made in shares of Valero
common  stock.  For  the  year  ended  December  31,  2001  and  2000,  employer
contributions were reduced by $130,552 and $33,672, respectively, from forfeited
non-vested  accounts.  As of December 31, 2001,  forfeited  non-vested  accounts
available to reduce future employer contributions were $63.

Participant Accounts:
Employer  contributions  are  credited  to  an  Employer  Account  and  employee
contributions  are credited to an Employee  Account  maintained under the Thrift
Plan for each  participant.  The Employer and Employee  Accounts are adjusted to
reflect  all  contributions,  withdrawals,  income,  expenses,  gains and losses
attributable to these  accounts.  Employer  contributions  are allocated to each
participant's  Employer  Account in the proportion  that a  participant's  basic
contribution  attributable  to their  annual base  salary  bears to the total of
comparable basic contributions for all participants.

                                       9


                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)


Vesting:
Participants   are  vested  100%  in  their  Employee   Account  at  all  times.
Participants  vest in their  Employer  Account  at the rate of 20% per year with
100% vesting after the fifth year of continuous service.

The Thrift Plan provides that if an employee  incurs a break in service prior to
becoming  vested in any part of their Employer  Account,  the  employee's  prior
continuous service will not be disregarded for purposes of the Thrift Plan until
the break in service  equals or exceeds  the greater of five years or the period
of prior continuous service. Upon a participant's  termination of employment for
other than death, total and permanent  disability or retirement,  the non-vested
portion of the  participant's  Employer  Account is forfeited.  In the event the
participant  is  reemployed  prior  to  incurring  a break  in  service  of five
successive years, any amounts forfeited under this provision will be reinstated.

Investment Options:
Participants  direct the investment of 100% of their employee  contributions and
may transfer existing account balances into any of the funds offered.  The funds
offered  include the Valero  Common Stock Fund,  mutual funds,  pooled  separate
accounts,  a  common/collective  trust  and  other  self-directed   investments.
Employer  contributions  are invested in Valero common stock. For  contributions
made  after June 1, 2000 and  through  December  31,  2001,  participants  could
transfer up to 50% of Valero's employer  contribution to any other fund offered.
The remaining 50% could only be invested in the Valero Common Stock Fund and was
non-transferable  until the participant reached early retirement age (age 55 and
five  years of  credited  service)  or age 59 1/2.  Effective  January  1, 2002,
employer  contributions  can  be  immediately   diversified  into  other  funds,
including existing employer contributions.

Withdrawals and Distributions:
Participants may make the following types of withdrawals of all or part of their
respective accounts:
o    one withdrawal  during any 12-month period from a  participant's  after-tax
     Employee  Account and rollover  contribution  account with no suspension of
     future contributions;
o    upon  completion  of five years of  participation  in the Thrift Plan,  one
     withdrawal from the participant's  after-tax  Employee Account and Employer
     Account,  with a similar  withdrawal  allowed 36 months after the date of a
     previous  withdrawal  under this  provision,  with no  suspension of future
     contributions;
o    upon reaching age 59 1/2, one withdrawal  during any 12-month period from a
     participant's Employee Account and Employer Account;
o    upon furnishing  proof of financial  necessity,  one withdrawal  during any
     12-month  period  from the  participant's  Employee  Account and the vested
     portion  of the  Employer  Account,  but,  for  withdrawals  of  before-tax
     amounts, not to exceed the aggregate amount of the participant's before-tax
     contributions.

Upon a participant's  death, total and permanent  disability or retirement,  the
participant,  or  beneficiary  of  a  deceased  participant,  is  entitled  to a
distribution  of the entire  value of the  participant's  Employee  Account  and
Employer  Account  regardless  of whether or not the accounts are fully  vested.
Upon a  participant's  termination  for any other  reason,  the  participant  is
entitled to a distribution of only the value of their Employee  Accounts and the
vested portion of their Employer  Account.  Distributions  resulting from any of
these  occurrences  may be  received  in a single sum in whole  shares of Valero
common stock and cash,  or entirely in cash.  Alternatively,  a  participant  or
beneficiary may elect to receive this  distribution in the form of equal monthly
installments  over a period not exceeding the  participant's  life expectancy or
the joint life expectancy of the participant and their  designated  beneficiary.
The amount of this  distribution  is  dependent  upon the  participant's  age at
commencement of the  distribution and certain other factors.  In addition,  when
the value of a distribution to a participant  exceeds $5,000,  the  distribution
may  be  made  prior  to  the  participant   attaining  age  65  only  with  the
participant's consent.

                                       10


                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)


Terminated  participants  may elect to have the Thrift Plan  trustee  hold their
accounts  for  distribution  to them at a date  not  later  than  April 1 of the
calendar  year after which they  attain age 70 1/2.  In this  event,  terminated
participants  continue  to share in the  earnings  and losses of the Thrift Plan
until their accounts are distributed.

Participant Loans:
Participants  may borrow,  subject to certain  limitations,  amounts credited to
their Employee  Account and the vested portion of their  Employer  Account.  The
minimum  loan amount is $500.  The maximum  loan amount a  participant  may have
outstanding is restricted to the lesser of:
(a)  $50,000,  reduced by the excess of (i) the highest  outstanding  balance of
     the   participant's   loans   during  a  one-year   period  over  (ii)  the
     participant's  then currently  outstanding  loan balance on the day any new
     loan is made, or
(b)  one-half of the current value of the participant's vested interest in their
     Thrift Plan account.
The  term of any loan  may not  exceed  five  years  unless  the loan is for the
purchase of a participant's  principal residence, in which case, the term of the
loan may not exceed 15 years. The balance of the participant's  Employee Account
and vested portion of his Employer Account serve as security for the loan. Loans
bear  interest  at a  reasonable  rate  as  established  by  the  Administrative
Committee, presently at prime plus 1%. Loan repayments of principal and interest
are made through payroll deductions or as otherwise determined. Participants may
have up to two loans outstanding under the Thrift Plan at any time.

Plan Expenses:
Administrative  expenses of the Thrift Plan, including trustee fees and expenses
and other costs, are paid by Valero,  or at Valero's option,  by the Thrift Plan
Trust.  During the years ended  December 31, 2001 and 2000,  Valero paid $57,044
and $0 of administrative expenses.

2.  Summary of Significant Accounting Policies

Basis of Accounting:
The financial statements of the Thrift Plan are prepared on the accrual basis of
accounting  in  accordance  with United  States  generally  accepted  accounting
principles.

Use of Estimates:
The  preparation  of  financial  statements  in  conformity  with United  States
generally accepted  accounting  principles requires management to make estimates
that  affect the  amounts  reported in the  financial  statements  of assets and
changes therein,  and disclosure of contingent  assets and  liabilities.  Actual
results could differ from those estimates.

                                       11


                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)


Valuation of Investments:
The Thrift Plan's investments are stated at fair value except for the investment
contract,  which is valued at contract  value.  Quoted market prices are used to
value  investments.  Shares of mutual funds are valued at the net asset value of
shares held by the Thrift Plan as of the balance sheet date. The  investments in
common/collective trusts are stated at fair value as determined by the issuer of
the fund based on the fair value of the  underlying  assets.  Investments in the
Stable Value Fund are comprised of an investment in an investment contract and a
common/collective  trust.  Money market  funds and employee  loans are valued at
cost, which approximates fair value.

Income Recognition:
Purchases and sales of investments are recorded on a trade-date basis.  Interest
income  is  recorded  on  the  accrual  basis.  Dividends  are  recorded  on the
ex-dividend date.

The net appreciation (depreciation) in fair value of investments consists of net
realized gains and losses and the net unrealized appreciation  (depreciation) of
investments.

Withdrawals by Participants:
Withdrawals by participants are recorded when paid.

Risks and Uncertainties:
The Thrift Plan's investments, in general, are exposed to various risks, such as
interest rate,  credit and overall market  volatility risks. Due to the level of
risk associated with certain investment  securities,  it is reasonably  possible
that changes in the values of investment  securities will occur in the near term
and that such changes could materially affect participants' account balances and
amounts reflected in the statements of net assets available for benefits.

Reclassifications:
Certain  previously  reported  amounts have been  reclassified to conform to the
2001 presentation.


                                       12


                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)


3.  Investments

Investments  that  represent  5% or more of the Thrift  Plan's net assets are as
follows:

                                                           December 31,
                                                           ------------
                                                        2001            2000
                                                        ----            ----
   Valero common stock:
       Nonparticipant-directed.................... $ 32,691,074    $ 28,241,597
       Participant-directed.......................   69,342,191      53,409,660
   Fidelity Magellan Fund.........................   27,757,031      29,696,046
   MetLife investment contract....................   21,509,350      19,526,004
   American Century Ultra Fund....................   17,542,988      19,759,890
   Merrill Lynch Retirement Preservation Trust*...   16,339,232       8,906,879
   ExxonMobil common stock**......................   13,871,542      15,530,589
-----------
*    As of December  31,  2000,  this  investment  is less than 5% of the Thrift
     Plan's net assets but is shown in this  schedule for  comparative  purposes
     only.
**   As of December  31,  2001,  this  investment  is less than 5% of the Thrift
     Plan's net assets but is shown in this  schedule for  comparative  purposes
     only.

During the years ended December 31, 2001 and 2000, the Thrift Plan's investments
(including  gains and losses on  investments  bought  and sold,  as well as held
during the year) appreciated (depreciated) in value as follows:

                                                   Years Ended December 31,
                                                   ------------------------
                                                    2001             2000
                                                    ----             ----

 Common stock................................. $  3,712,899      $ 33,385,792
 Mutual funds.................................  (14,149,569)      (20,887,658)
 Common/collective trusts.....................   (1,650,728)       (1,290,702)
 Pooled separate accounts.....................            -               900
                                                 ----------        ----------
    Net appreciation (depreciation) in
      fair value of investments............... $(12,087,398)     $ 11,208,332
                                                 ==========        ==========

4.  Nonparticipant-Directed Investments

Nonparticipant-directed    investments   include   the   portion   of   employer
contributions that is required to be invested in the Valero Common Stock Fund as
discussed   in  note  1  under   Investment   Options.   Nonparticipant-directed
investments  also  include  forfeited  non-vested  employer  accounts  that  are
available to reduce future  employer  contributions.  Information  about the net
assets and the  significant  components of the changes in net assets relating to
nonparticipant-directed investments is as follows:

                                       13



                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)



                                                           December 31,
                                                           ------------
                                                       2001             2000
                                                       ----             ----
  Net assets:
    Valero common stock.......................    $ 32,691,074     $ 28,241,597
    Pooled separate accounts..................               -           11,144
    Due from brokers for securities sold......               -            5,546
                                                    ----------       ----------
                                                  $ 32,691,074     $ 28,258,287
                                                    ==========       ==========


                                                     Years Ended December 31,
                                                     ------------------------
                                                       2001             2000
                                                       ----             ----
  Changes in net assets:
    Interest income...........................    $      1,015     $      1,302
    Dividend income...........................         272,585          274,171
    Net appreciation..........................         400,642       11,719,828
    Contributions.............................       5,920,439        5,572,931
    Withdrawals by participants...............      (1,260,888)      (2,179,333)
    Participant loan repayments, net of
       loan disbursements and other...........         (12,022)         118,889
    Transfers to participant-directed
       investments...........................         (888,984)      (3,857,948)
                                                    ----------       ----------
       Net increase in net assets.............       4,432,787       11,649,840
  Net assets as of beginning of year..........      28,258,287       16,608,447
                                                    ----------       ----------
  Net assets as of end of year................    $ 32,691,074     $ 28,258,287
                                                    ==========       ==========

5.  Party in Interest Transactions

Certain  Thrift  Plan  investments  are  shares  of  Valero  common  stock,  and
collective   trusts  and  mutual  funds  that  are  managed  by  Merrill  Lynch.
Transactions in these investments qualify as party in interest transactions.

6.  Plan Termination

Although it has not  expressed  any intent to do so,  Valero has the right under
the Thrift Plan to discontinue  its  contributions  at any time and to terminate
the  Thrift  Plan  subject  to the  provisions  of  ERISA.  In the  event of any
termination  of  the  Thrift  Plan  or  complete   discontinuance   of  employer
contributions, participants would become 100% vested in their Employer Account.

7.  Tax Status

The Internal  Revenue  Service has  determined  and informed  Valero by a letter
dated  April 21,  2002,  that the Thrift Plan is  designed  in  accordance  with
applicable sections of the Code. Although the Thrift Plan has been amended since
receiving the determination letter, the Thrift Plan administrator  believes that
the Thrift Plan is designed and is currently  being operated in compliance  with
the applicable requirements of the Code.



                                       14


8. Reconciliation of Financial Statements to Form 5500

The following is a  reconciliation  of net assets available for benefits per the
financial  statements to the Form 5500 Annual  Return/Report of Employee Benefit
Plan:



                                                                                              December 31,
                                                                                              ------------
                                                                                       2001                 2000
                                                                                       ----                 ----
                                                                                                 
        Net assets available for benefits per the financial statements.........    $ 306,543,079       $ 275,276,647
            Amounts allocated to withdrawing participants .....................           (2,666)                  -
                                                                                     -----------         -----------
        Net assets available for benefits per the Form 5500 ...................    $ 306,540,413       $ 275,276,647
                                                                                     ===========         ===========


The  following  is a  reconciliation  of  withdrawals  by  participants  per the
financial  statements to the Form 5500 Annual  Return/Report of Employee Benefit
Plan:



                                                                                        Years Ended December 31,
                                                                                        ------------------------
                                                                                        2001               2000
                                                                                        ----               ----
                                                                                                  
        Withdrawals by participants per the financial statements ..............     $ 13,392,586        $ 19,545,149
            Add: Amounts allocated to withdrawing participants
              as of end of year    ............................................            2,666                   -
            Less: Amounts allocated to withdrawing participants
              as of beginning of year   .......................................                -             (96,169)
                                                                                      ----------          ----------
        Benefits paid to participants per the Form 5500 .......................     $ 13,395,252        $ 19,448,980
                                                                                      ==========          ==========


9.  Subsequent Events

Effective January 1, 2002, the Thrift Plan was amended as follows:
o    employees  covered  by  a  collective  bargaining  agreement  (unless  such
     benefits  have been  specifically  bargained  for) and UDS  Eligible  Group
     Employees, as defined in the plan document, are ineligible to participate;
o    cash bonuses are included in participants' annual total salary;
o    participants   can   authorize   contributions   up  to  30%  of   eligible
     compensation;
o    employer contributions will equal 75% of employee contributions up to 8% of
     eligible  compensation;  however,  for employee  contributions  for payroll
     periods beginning on or after January 1, 2002 and beginning before February
     1, 2002, the employer contribution will equal 100%; and
o    employer  contributions  can be immediately  diversified  into other funds,
     including existing employer contributions.

Effective March 1, 2002, withdrawals previously available once during a 12-month
period are now available for withdrawal once every six months.

Effective  April 1,  2002,  UDS  non-store  employees,  as  defined  in the plan
document,  are eligible to participate and to make  contributions  to the Thrift
Plan and will receive credit for eligibility and vesting  purposes for all prior
service with UDS.


                                       15


                     VALERO ENERGY CORPORATION THRIFT PLAN

                   NOTES TO FINANCIAL STATEMENTS - (Continued)



Effective  May 1, 2002,  the portion of the UDS 401(k)  Retirement  Savings Plan
(now renamed the Valero  Savings Plan)  related to UDS  non-store  employees was
merged  into the  Thrift  Plan.  The  assets  transferred  from  the UDS  401(k)
Retirement Savings Plan to the Thrift Plan totaled approximately $153.0 million.







                                       16





                                                             SCHEDULE H, Line 4i

                      VALERO ENERGY CORPORATION THRIFT PLAN
                                 EIN: 74-1828067
                                  Plan No. 002

                    Schedule of Assets (Held At End of Year)
                             As of December 31, 2001


                                                                      Current
Identity of Issue/Description of Investment             Cost**         Value
-------------------------------------------          ------------  -------------
    Common stock:
    *Valero Energy Corporation:
       Nonparticipant-directed..................... $ 22,974,273  $  32,691,074
       Participant-directed........................                  69,342,191
     PG&E .........................................                   5,550,533
     Citigroup Inc ................................                   5,204,217
                                                                    -----------
                                                                    112,788,015
                                                                    -----------
    Stable Value Fund:
     MetLife investment contract.................                    21,509,350
    *Merrill Lynch Retirement
      Preservation Trust.........................                    16,339,232
                                                                    -----------
                                                                     37,848,582
                                                                    -----------
    Common/collective trust:
    *Merrill Lynch Equity Index Trust.............                   12,886,267
                                                                    -----------
    Mutual funds:
     Fidelity Magellan Fund......................                    27,757,031
     American Century Ultra Fund.................                    17,542,988
     American EuroPacific Growth Fund............                    11,916,447
     MFS Massachusetts Investors Growth Fund.....                    10,624,834
    *Merrill Lynch Global Allocation Fund ........                    5,828,681
    *Merrill Lynch Basic Value Fund...............                    6,029,771
     Fidelity Equity-Income Fund.................                     2,994,383
     Fidelity Blue Chip Growth Fund..............                     1,789,441
     AIM Income Fund.............................                     1,215,093
     Templeton Foreign Fund......................                     1,439,468
    *Merrill Lynch Intermediate Corporate Bond
       Fund.................... .................                     2,106,004
     Fidelity Intermediate Bond Fund.............                       134,978
                                                                     ----------
                                                                     89,379,119
                                                                     ----------

    Self-directed account investments...............                 40,713,127

   *Participant loans (interest rates ranging
        from 7% to 11%).............................                 12,782,815
                                                                     ----------

        Total Assets (Held at End of Year)..........              $ 306,397,925
                                                                    ===========
------------------------------------------------------
*   Party  in  interest  to  the  Thrift  Plan.
**  Allowed  to be  omitted  for participant-directed investments.



                                       17




                                    SIGNATURE


The Plan.  Pursuant to the requirements of the Securities  Exchange Act of 1934,
the Administrative  Committee has duly caused this annual report to be signed on
its behalf by the undersigned hereunto duly authorized.


                                        VALERO ENERGY CORPORATION THRIFT PLAN


                                        By /s/ John D. Gibbons
                                           -------------------------------------
                                            John D. Gibbons
                                            Chairman, Administrative Committee
                                            and Executive Vice President and
                                            Chief Financial Officer,
                                            Valero Energy Corporation

Date:  June 28, 2002



                                       18






                                                                    EXHIBIT 23.1


                         CONSENT OF INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement (Form
S-8 No. 333-31727) pertaining to the Thrift Plan of Valero Energy Corporation of
our report dated June 26, 2002,  with respect to the  financial  statements  and
schedule of the Valero  Energy  Corporation  Thrift Plan included in this Annual
Report (Form 11-K) for the year ended December 31, 2001.


                                                      /s/ ERNST & YOUNG LLP



San Antonio, Texas
June 26, 2002



                                       19




                                                                    EXHIBIT 23.2


                 NOTICE REGARDING CONSENT OF ARTHUR ANDERSEN LLP

On June 12, 2002, the Valero Energy  Corporation  Thrift Plan  dismissed  Arthur
Andersen  LLP as its  independent  auditors and  appointed  Ernst & Young LLP to
replace Arthur Andersen LLP as the independent auditor of the Thrift Plan. Prior
to the date of this Form 11-K (which is  incorporated  by reference  into Valero
Energy  Corporation's  filing on Form S-8 No.  333-31727),  the Arthur  Andersen
partner  responsible  for  the  audit  of  the  most  recent  audited  financial
statements of the Valero Energy  Corporation Thrift Plan as of December 31, 2000
and for the year then ended resigned from Arthur  Andersen.  As a result,  after
reasonable efforts, the Plan has been unable to obtain Arthur Andersen's written
consent to the  incorporation  by  reference  into Valero  Energy  Corporation's
filing on Form S-8 No.  333-31727 of its audit report with respect to the Plan's
financial  statements as of December 31, 2000 and for the year then ended. Under
these circumstances, Rule 437a under the Securities Act permits the Plan to file
this Form 11-K without a written consent from Arthur Andersen LLP. However, as a
result,  Arthur  Andersen LLP will not have any liability under Section 11(a) of
the Securities Act for any untrue statements of a material fact contained in the
financial  statements  audited  by Arthur  Andersen  LLP or any  omissions  of a
material fact required to be stated therein. Accordingly, you would be unable to
assert a claim against Arthur Andersen LLP under Section 11(a) of the Securities
Act  because it has not  consented  to the  incorporation  by  reference  of its
previously issued report into Valero Energy Corporation's filing on Form S-8 No.
333-31727.


                                       20