Exhibit 4.3              
                             
                                
                                
                      ULTRAMAR CORPORATION
                                
                  CERTIFICATE OF DESIGNATIONS
                                
           5% CUMULATIVE CONVERTIBLE PREFERRED STOCK
                                
           (Pursuant to Section 151(g) of the General
           Corporation Law of the State of Delaware)
                                 
     
               Ultramar Corporation, a corporation organized and
     existing under the laws of the State of Delaware, does
     hereby certify that:
     
               FIRST:  Ultramar Corporation (the "Corporation")
     was incorporated in the State of Delaware on April 28, 1992;
     
               SECOND:  Pursuant to authority conferred upon the
     Board of Directors under the Certificate of Incorporation of
     the Corporation ("Certificate") and the provisions of
     Sections 141 and 151 of the General Corporation Law of the
     State of Delaware, the Board of Directors of the Corporation
     acting at the Board of Directors' meeting held on
     December 3, 1996, at which a quorum was at all times present
     and voting, adopted resolutions, which are in full force and
     effect and are not in conflict with any provisions of the
     Corporation's Certificate or its By-laws, approving this
     certificate of designations and authorizing the undersigned
     to execute and deliver this certificate of designations
     setting forth the number, terms, designation, relative
     rights, preferences and limitations of a series of preferred
     stock, $.01 par value, of the Corporation as follows:
     
               (a)  Designation.  There is hereby created a class
     of preferred stock, $.01 par value, of this Corporation to
     be known as "5% Cumulative Convertible Preferred Stock" (the
     "5% Preferred Stock").  The number of shares of 5% Preferred
     Stock authorized for issuance is 1,725,000.
     
               (b)  Stated Capital.  The amount to be represented
     in stated capital at all times for each share of 5%
     Preferred Stock shall be $.01.
     
               (c)  Rank.  All 5% Preferred Stock shall rank
     prior to all of the Corporation's Common Stock, $.01 par
     value (the "Common Stock"), now or hereafter issued, both as
     to payment of dividends and as to distributions of assets
     upon liquidation, dissolution or winding up of the
     Corporation, whether voluntary or involuntary.
     
               (d)  Dividends.  The holders of shares of 5%
     Preferred Stock shall be entitled to receive dividends at
     the rate of $2.50 per annum per share, and no more, which
     shall be fully cumulative and shall accrue without interest. 
     Dividends will be payable in cash quarterly on March 15,
     June 15, September 15, and December 15 of each year
     commencing March 15, 1997 (except that if any such date is a
     Saturday, Sunday or legal holiday then such dividend shall
     be payable on the next day that is not a Saturday, Sunday or
     legal holiday) to holders of record as they appear on the
     stock books of the Corporation on the applicable record
     date, which shall be not more than 60 nor less than 10 days
     preceding the payment date for such dividends, as are fixed
     by the Board of Directors, but only when, as and if declared
     by the Board of Directors out of funds at the time legally
     available for the payment of dividends.  The amount of
     dividends payable per share of 5% Preferred Stock for each
     quarterly dividend period shall be computed by dividing the
     annual dividend amount per share by four.  The amount of
     dividends payable for any period shorter than a full
     quarterly dividend period shall be computed on the basis of
     a 360-day year of twelve 30-day months.  No dividends or
     other distributions, other than dividends payable solely in
     shares of Common Stock or other capital stock of the
     Corporation ranking junior as to dividends to the 5%
     Preferred Stock ("Junior Dividend Stock"), shall be paid or
     set apart for payment on, and no purchase, redemption or
     other acquisition shall be made by the Corporation of, any
     shares of Common Stock or Junior Dividend Stock unless and
     until all accrued and unpaid dividends on the 5% Preferred
     Stock shall have been paid or declared and set apart for
     payment.
     
               If at any time the Corporation shall have failed
     to pay, or declare and set apart for payment, in full any
     accrued dividend on any capital stock of the Corporation
     ranking senior as to dividends to the 5% Preferred Stock
     ("Senior Dividend Stock"), in whole or in part, no dividend
     shall be paid or declared and set apart for payment on the
     5% Preferred Stock unless and until all accrued and unpaid
     dividends (plus interest, if required) with respect to the
     Senior Dividend Stock shall have been paid or declared and
     set apart for payment, without interest.  No full cumulative
     dividends shall be paid or declared and set apart for
     payment on any class or series of the Corporation's capital
     stock ranking, as to dividends, on a parity with the 5%
     Preferred Stock (the "Parity Dividend Stock") for any period
     unless full cumulative dividends have been, or
     contemporaneously are, paid or declared and set apart for
     such payment on the 5% Preferred Stock for all dividend
     payment periods terminating on or prior to the date of
     payment of such full cumulative dividends.  No dividends
     shall be paid or declared and set apart for payment on the
     5% Preferred Stock for any period unless full cumulative
     dividends have been, or contemporaneously are, paid or
     declared and set apart for payment on the Parity Dividend
     Stock for all dividend periods terminating on or prior to
     the date of payment of such dividends on the 5% Preferred
     Stock.  When dividends are not paid in full upon the 5%
     Preferred Stock and the Parity Dividend Stock, all dividends
     paid or declared and set aside for payment upon shares of 5%
     Preferred Stock and the Parity Dividend Stock shall be paid
     or declared and set aside for payment pro rata so that the
     amount of dividends paid or declared and set aside for
     payment per share on the 5% Preferred Stock and the Parity
     Dividend Stock shall in all cases bear to each other the
     same ratio that accrued and unpaid dividends per share on
     the shares of 5% Preferred Stock and the Parity Dividend
     Stock bear to each other.
     
               Any reference to "distribution" contained in this
     Paragraph (d) shall not be deemed to include any stock
     dividend or distributions made in connection with any
     liquidation, dissolution or winding up of the Corporation,
     whether voluntary or involuntary.
     
               (e)  Liquidation Preference.  In the event of a
     liquidation, dissolution or winding up of the Corporation,
     whether voluntary or involuntary, the holders of 5%
     Preferred Stock shall be entitled to receive out of the
     assets of the Corporation, whether such assets are stated
     capital or surplus of any nature, an amount equal to the
     dividends accrued and unpaid thereon as of the date of final
     distribution to such holders, whether or not declared,
     without interest, and a sum equal to $50.00 per share, and
     no more, before any payment shall be made or any assets
     distributed to the holders of Common Stock or any other
     class or series of the Corporation's capital stock ranking
     junior as to liquidation rights to the 5% Preferred Stock
     (the "Junior Liquidation Stock"); provided, however, that
     such rights shall accrue to the holders of 5% Preferred
     Stock only in the event that the Corporation's payments with
     respect to the liquidation preferences of the holders of
     capital stock of the Corporation ranking senior as to
     liquidation rights to the 5% Preferred Stock (the "Senior
     Liquidation Stock") are fully met.  The entire assets of the
     Corporation available for distribution after the liquidation
     preferences of the Senior Liquidation Stock are fully met
     shall be distributed ratably among the holders of the 5%
     Preferred Stock and any other class or series of the
     Corporation's capital stock which may hereafter be created
     having parity as to liquidation rights with the 5% Preferred
     Stock in proportion to the respective preferential amounts
     to which each is entitled (but only to the extent of such
     preferential amounts).  Neither a consolidation or merger of
     the Corporation with another corporation nor a sale or
     transfer of all or part of the Corporation's assets for
     cash, securities or other property will be considered a
     liquidation, dissolution or winding up of the Corporation.
     
               (f)  Redemption at Option of the Corporation.  The
     Corporation, at its option, may at any time prior to
     June 14, 2000, redeem all or any part of the 5% Preferred
     Stock on any date set by the Board of Directors of the
     Corporation by issuing for each share of 5% Preferred Stock
     being redeemed such number of shares of Common Stock as are
     equal to $50.00 divided by the Conversion Price (as defined
     in Paragraph (h) below), and by paying an amount in cash
     equal to accrued and unpaid dividends to the date fixed for
     redemption.  The Corporation may exercise such option only
     if, for 20 of any 30 consecutive trading days, including the
     last trading day of such period, the Closing Price (as
     defined in Paragraph (h) below) of the Common Stock exceeds
     130% of the Conversion Price of the Common Stock in effect
     on the last trading day of such 30-trading-day period.  To
     exercise its redemption right under this Paragraph (f), the
     Corporation must issue a press release announcing the
     redemption prior to 9:00 a.m. New York City time on the
     second trading day after the end of any such 30-consecutive-
     trading day period described in the preceding sentence.  On
     or after June 15, 2000, the 5% Preferred Stock is redeemable
     for cash, in whole or in part, at any time at the option of
     the Corporation, at a redemption price of $50.00 per share,
     plus accrued and unpaid dividends to the date fixed for
     redemption.
     
               If the Corporation intends to redeem less than all
     of the then-outstanding shares of 5% Preferred Stock, the
     Corporation shall designate by lot, or in such other manner
     as the Board of Directors may determine, the shares to be
     redeemed, or shall effect such redemption pro rata. 
     Notwithstanding the foregoing, the Corporation shall not
     redeem less than all of the 5% Preferred Stock at any time
     outstanding until all dividends accrued and in arrears upon
     all 5% Preferred Stock then outstanding shall have been
     paid.
     
               Not more than 60 nor less than 15 days prior to
     the redemption date, and, if the redemption is to occur on
     or prior to June 14, 2000, not more than four days after the
     Corporation issues the press release required under the
     first paragraph of this Paragraph (f), notice by first class
     mail, postage prepaid, shall be given to the holders of
     record of the 5% Preferred Stock to be redeemed, addressed
     to such stockholders at their last addresses as shown on the
     stock books of the Corporation.  Each such notice of
     redemption shall specify the date fixed for redemption; the
     redemption price (if the 5% Preferred Stock is to be
     redeemed for cash); the number of shares of Common Stock to
     be delivered (if the 5% Preferred Stock is to be redeemed
     for Common Stock); the place or places for payment or
     delivery; that payment or delivery of the Common Stock will
     be made upon presentation and surrender of the certificates
     representing shares of 5% Preferred Stock being redeemed;
     that accrued but unpaid dividends to the date fixed for
     redemption will be paid on the date fixed for redemption;
     that (if the 5% Preferred Stock is to be redeemed for Common
     Stock) a cash adjustment for fractional shares of Common
     Stock will be paid on the date fixed for redemption; that
     conversion rights with respect to the 5% Preferred Stock
     will expire on the close of business on the redemption date;
     and that on and after the redemption date, dividends will
     cease to accrue on such shares.  If a dividend with respect
     to the 5% Preferred Stock has been declared by the Board of
     Directors of the Corporation and if the redemption date with
     respect to a redemption of 5% Preferred Stock for either
     cash or Common Stock falls after the dividend record date
     established by the Board of Directors of the Corporation
     with respect to such dividend, but prior to the related
     dividend payment date, the record holders of the 5%
     Preferred Stock on such record date will be entitled to
     receive the dividend payable on the 5% Preferred Stock,
     notwithstanding the redemption thereof.
     
               Any notice which is mailed as herein provided
     shall be conclusively presumed to have been duly given,
     whether or not the holder of the 5% Preferred Stock receives
     such notice; and failure to give such notice by mail, or any
     defect in such notice, to the holders of any shares
     designated for redemption shall not affect the validity of
     the proceedings for the redemption of any other shares of 5%
     Preferred Stock.  On or after the date fixed for redemption,
     as stated in such notice, each holder of the shares of 5%
     Preferred Stock called for redemption shall surrender the
     certificate evidencing such shares to the Corporation at the
     place designated in such notice and shall thereupon be
     entitled to receive payment of the redemption price or
     delivery of shares of Common Stock deliverable upon
     redemption, as the case may be.  If less than all shares
     represented by any such surrendered certificate are
     redeemed, a new certificate shall be issued representing the
     unredeemed shares.  If on the date fixed for redemption a
     sufficient number of shares of Common Stock, if applicable,
     and the funds necessary for the redemption shall be
     available therefor and shall have been irrevocably deposited
     with the transfer agent for the 5% Preferred Stock, then,
     notwithstanding that the certificates evidencing any shares
     of 5% Preferred Stock so called for redemption shall not
     have been surrendered, dividends with respect to the shares
     of 5% Preferred Stock so called for redemption shall cease
     to accrue after the date fixed for redemption, such shares
     shall no longer be deemed outstanding, and all rights
     whatsoever with respect to the shares so called for
     redemption (except the right of the holders to receive any
     Common Stock issuable and any cash payable, without
     interest, upon surrender of their certificates therefor)
     shall terminate.  Shares of 5% Preferred Stock redeemed by
     the Corporation will be restored to the status of authorized
     but unissued shares of preferred stock, without designation
     as to class, and may thereafter be issued, but not as shares
     of 5% Preferred Stock.
     
               No fractional shares of Common Stock shall be
     issued upon redemption of 5% Preferred Stock for Common
     Stock, and in lieu of any fraction of a share of Common
     Stock which would otherwise be issuable in respect of the
     aggregate number of such shares of 5% Preferred Stock
     redeemed at one time from the same record holder, the
     Corporation shall pay in cash (rounded to the nearest cent)
     an amount equal to the product of (i) the Closing Price of a
     share of Common Stock on the last trading day with respect
     to the Common Stock before the redemption date, and
     (ii) such fraction of a share.
     
               The Corporation shall not be required to pay any
     tax which may be payable in respect of any transfer involved
     in the issue and delivery upon redemption of shares of 5%
     Preferred Stock for shares of Common Stock in a name other
     than that of the record holder of the shares of the 5%
     Preferred Stock being redeemed and the Corporation shall not
     be required to issue or deliver any such shares unless and
     until the person or persons requesting the issuance thereof
     shall have paid to the Corporation the amount of any such
     tax or shall have established to the satisfaction of the
     Corporation that such tax has been paid.
     
               (g)  No Sinking Fund.  The shares of 5% Preferred
     Stock shall not be subject to the operation of a purchase,
     retirement or sinking fund.
     
               (h)  Conversion.  The holders of the 5% Preferred
     Stock may, upon surrender of the certificates therefor,
     convert any or all of their shares of 5% Preferred Stock
     into fully paid and nonassessable shares of Common Stock and
     such other securities and property as hereafter provided at
     any time after issuance thereof, but not later than the
     close of business on the date, if any, fixed for the
     redemption thereof in any notice of redemption given
     pursuant to the provisions of Paragraph (f) hereof unless
     there is a default in payment of cash, or the delivery of
     Common Stock issuable, in connection with such redemption in
     which case such conversion may be effected any time prior to
     a subsequent redemption date on which such payment of cash
     and/or delivery of Common Stock is made in full.  Each share
     of 5% Preferred Stock shall be convertible at the office of
     the transfer agent for the 5% Preferred Stock, and at such
     other office or offices, if any, as the Board of Directors
     of the Corporation may designate, into the number of fully
     paid and nonassessable shares of Common Stock (calculated as
     to each conversion to the nearest 1/100th of a share)
     obtained by dividing $50.00 by the Conversion Price in
     effect at the time of conversion.  Shares of 5% Preferred
     Stock may be converted into full shares of Common Stock at
     the initial conversion price of $25.98 per share of Common
     Stock, subject to adjustment as hereinafter provided (the
     "Conversion Price").  No adjustment shall be made in respect
     of cash dividends on Common Stock or 5% Preferred Stock that
     may be accrued and unpaid at the date of surrender for
     conversion.  Notwithstanding anything in this Paragraph (h)
     to the contrary, no change in the Conversion Price shall
     actually be made until the cumulative effect of the
     adjustments called for by this Paragraph (h) since the date
     of the last change in the Conversion Price would change the
     Conversion Price by more than 1%.  However, once the
     cumulative effect would result in a change of more than 1%,
     then the Conversion Price shall actually be changed to
     reflect all adjustments called for by this Paragraph (h) and
     not previously made.  Notwithstanding anything in this
     Paragraph (h) to the contrary, no change in the Conversion
     Price shall be made which would result in a Conversion Price
     of less than the par value of the Common Stock.
     
               The right of the holders of 5% Preferred Stock to
     convert their shares shall be exercised by surrendering for
     such purpose to the Corporation or its agent, as provided
     above, certificates representing all shares to be converted,
     duly endorsed in blank or accompanied by proper instruments
     of transfer.  The Corporation shall not be required to pay
     any tax which may be payable in respect of any transfer
     involved in the issue and delivery upon conversion of shares
     of 5% Preferred Stock for shares of Common Stock or other
     securities or property in a name other than that of the
     recordholder of the shares of 5% Preferred Stock being
     converted and the Corporation shall not be required to
     issue or deliver any such shares of Common Stock or other
     securities or property unless and until the person or
     persons requesting the issuance thereof shall have paid
     to the Corporation the amount of any such tax or shall
     have established to the satisfaction  of the Corporation
     that such tax has been paid.
     
               A number of shares of authorized but unissued
     Common Stock sufficient to provide for the conversion of the
     5% Preferred Stock outstanding upon the basis herein
     provided shall at all times be reserved by the Corporation,
     free from preemptive rights, for such conversion, subject to
     the provisions of the next succeeding paragraph.  If the
     Corporation shall issue any securities or make any change in
     its capital structure which would change the Conversion
     Price of the Common Stock into which each share of the 5%
     Preferred Stock is convertible as herein provided, the
     Corporation shall at the same time also make proper
     provision so that thereafter there shall be a sufficient
     number of shares of Common Stock authorized and reserved,
     free from preemptive rights, for conversion of the
     outstanding 5% Preferred Stock at the new Conversion Price.
     
               In case of any consolidation or merger of the
     Corporation with any other corporation (other than a wholly
     owned subsidiary of the Corporation), or in case of any sale
     or transfer of all or substantially all of the assets of the
     Corporation, or in the case of any share exchange pursuant
     to which all of the outstanding shares of Common Stock are
     converted into other securities or property, the Corporation
     shall make appropriate provision or cause appropriate
     provision to be made so that holders of each share of 5%
     Preferred Stock then outstanding shall have the right
     thereafter to convert such share of 5% Preferred Stock into
     the kind and amount of shares of stock and other securities
     and property receivable upon such consolidation, merger,
     sale, transfer or share exchange by a holder of the number
     of shares of Common Stock into which such share of 5%
     Preferred Stock might have been converted immediately prior
     to the effective date of such consolidation, merger, sale,
     transfer or share exchange.  If in connection with any such
     consolidation, merger, sale, transfer or share exchange,
     each holder of shares of Common Stock is entitled to elect
     to receive either securities, cash or other assets upon
     completion of such transaction, the Corporation shall
     provide or cause to be provided to each holder of 5%
     Preferred Stock the right to elect the securities, cash or
     other assets into which the 5% Preferred Stock held by such
     holder shall be convertible after completion of any such
     transaction on the same terms and subject to the same
     conditions applicable to holders of the Common Stock
     (including, without limitation, notice of the right to
     elect, limitations on the period in which such election
     shall be made and the effect of failing to exercise the
     election).  The Corporation shall not effect any such
     transaction unless the provisions of this paragraph have
     been complied with.  The above provisions shall similarly
     apply to successive consolidations, mergers, sales,
     transfers or share exchanges.
     
               Upon the surrender of certificates representing
     shares of 5% Preferred Stock, the person converting such
     shares shall be deemed to be the holder of record of the
     Common Stock issuable upon such conversion and all rights
     with respect to the shares surrendered shall forthwith
     terminate except the right to receive the Common Stock or
     other securities, cash or other assets as herein provided.
     
               No fractional shares of Common Stock shall be
     issued upon conversion of 5% Preferred Stock but, in lieu of
     any fraction of a share of Common Stock which would
     otherwise be issuable in respect of the aggregate number of
     such shares of 5% Preferred Stock surrendered for conversion
     at one time by the same holder, the Corporation shall pay in
     cash an amount equal to the product of (i) the Closing Price
     of a share of Common Stock on the last trading day before
     the conversion date and (ii) such fraction of a share.
     
               For the purposes of any computation pursuant to
     this Paragraph (h), the "Current Market Price" per share of
     the Common Stock shall be deemed to be the average daily
     Closing Prices of the Common Stock for the 30 consecutive
     trading days commencing 45 trading days before the date to
     which reference is made in subparagraphs (1) or (2) below. 
     The "Closing Price" for each trading day shall be the last
     reported sales price regular way or, in case no sale takes
     place on such day, the average of the closing bid and asked
     prices regular way on such day, in either case as reported
     on the New York Stock Exchange ("NYSE") Composite Tape, or
     if the Common Stock is not listed or admitted to trading on
     the NYSE, on the principal national securities exchange on
     which the Common Stock is listed or admitted to trading, or
     if not listed or admitted to trading on any national
     securities exchange, the average of the high bid and low
     asked prices on such day as reported by the National
     Association of Securities Dealers, Inc. through NASDAQ, or
     if the National Association of Securities Dealers, Inc.
     through NASDAQ shall not have reported any bid and asked
     prices for the Common Stock on such day, the average of the
     bid and asked prices for such day as furnished by any NYSE
     member firm selected from time to time by the Corporation
     for such purpose, or if no such bid and asked prices can be
     obtained from any such firm, the fair market value of one
     share of the Common Stock on such day as determined in good
     faith by the Board of Directors of the Corporation.
     
               The Conversion Price shall be adjusted from time
     to time under certain circumstances, subject to the
     provisions of the last three sentences of the first
     paragraph of this Paragraph (h) as follows:
     
               (1)  In case the Corporation shall (w) pay a
               dividend or make a distribution on its Common Stock in
               shares of its capital stock, (x) subdivide its
               outstanding Common Stock into a greater number of
               shares, (y) combine the shares of its outstanding
               Common Stock into a smaller number of shares, or
               (z) issue by reclassification of its Common Stock any
               shares of its capital stock, then in each such case the
               Conversion Price in effect immediately prior thereto
               shall be proportionately adjusted so that the holder of
               any 5% Preferred Stock thereafter surrendered for
               conversion shall be entitled to receive, to the extent
               permitted by applicable law, the number and kind of
               shares of capital stock of the Corporation which he
               would have owned or have been entitled to receive after
               the happening of such event had the 5% Preferred Stock
               held by such holder been converted immediately prior to
               the record date (or if no record date has been
               established in connection with such event, the
               effective date) for such action.  An adjustment
               pursuant to this subparagraph (1) shall become
               effective immediately after the record date in  the
               case of a stock dividend or distribution and shall
               become effective immediately after the effective date
               in the case of a subdivision, combination or
               reclassification.
     
               (2)  In case the Corporation shall issue rights or
               warrants to all holders of the Common Stock entitling
               such holders to subscribe for or purchase Common Stock
               at a price per share less than the Current Market Price
               per share of the Common Stock on the record date
               referred to below, then in each such case the
               Conversion Price in effect on such record date shall be
               adjusted in accordance with the formula:
     
                                        O + N  
                    C' = C divided by O + N x P
                                            M
     
          where
     
          C' = the adjusted Conversion Price.
          C  = the current Conversion Price.
          O  = the number of shares of Common Stock outstanding
                    on the record date.
          N  = the number of additional shares of Common Stock
                    offered.
          P  = the offering price per share of the additional
                    shares.
          M  = the Current Market Price per share of Common Stock
                    on the record date.
     
          Such adjustment shall become effective immediately
          after the record date for the determination of
          stockholders entitled to receive such rights or
          warrants.  If any or all such rights or warrants are
          not so issued or expire or terminate before being
          exercised, the Conversion Price then in effect shall be
          appropriately readjusted.
     
               Except as otherwise provided above in this
     Paragraph (h), no adjustment in the Conversion Price shall
     be made in respect of any conversion for share distributions
     or dividends theretofore declared and paid or payable on the
     Common Stock.
     
               Whenever the Conversion Price is adjusted as
     herein provided, the Corporation shall send to the transfer
     agent for the 5% Preferred Stock and to the principal
     securities exchange, if any, on which the 5% Preferred Stock
     is traded, a statement signed by the Chairman of the Board,
     the Vice-Chairman of the Board, the Chief Executive Officer,
     the President, the Chief Operating Officer or any Vice
     President of the Corporation and by its Treasurer or its
     Secretary stating the adjusted Conversion Price determined
     as provided in this Paragraph (h) and any adjustment so
     evidenced, given in good faith, shall be binding upon all
     stockholders of the Corporation and upon the Corporation. 
     Whenever the Conversion Price is adjusted, the Corporation
     will give notice by mail stating the adjustment and the
     Conversion Price at the time of, and together with, the next
     dividend payment to holders of record of 5% Preferred Stock. 
     Notwithstanding the foregoing notice provisions, failure of
     the Corporation to give such notice or a defect in such
     notice shall not affect the Corporation's obligation to
     adjust the Conversion Price as provided herein.
     
               Whenever the Corporation shall propose to take any
     of the actions specified in the third paragraph or in
     subparagraphs (1) or (2) of the eighth paragraph of this
     Paragraph (h) which would result in any adjustment in the
     Conversion Price under this Paragraph (h), the Corporation
     shall cause a notice to be mailed at least 15 days prior to
     the date on which the books of the Corporation will close or
     on which record will be taken for such action, to the
     holders of record of the outstanding 5% Preferred Stock on
     the date of such notice.  Such notice shall specify the
     action proposed to be taken by the Corporation and the date
     as of which holders of record of the Common Stock shall
     participate in any such actions or be entitled to exchange
     their Common Stock for securities or other property, as the
     case may be.  Failure to mail the notice or defect in it
     shall not affect the validity of the transaction.
     
               Notwithstanding any other provision of this
     Paragraph (h), no adjustment in the Conversion Price need be
     made (i) for a transaction referred to in subparagraphs (1)
     or (2) of the eighth paragraph of this Paragraph (h) if
     holders of 5% Preferred Stock are to participate in the
     transaction on a basis and with notice that the Board of
     Directors determines to be fair and appropriate in light of
     the basis and notice on which holders of Common Stock
     participate in the transaction; (ii) for sales of Common
     Stock pursuant to a plan for reinvestment of dividends and
     interest or pursuant to any employee benefit plan adopted by
     the Corporation; or (iii) for a change in par value of the
     Common Stock.
     
               The Corporation from time to time may decrease the
     Conversion Price by any amount for any period of time if the
     period is at least 20 days and if the decrease is
     irrevocable during the period.  Whenever the Conversion
     Price is decreased, the Corporation shall mail to holders of
     record of 5% Preferred Stock a notice of the decrease.  The
     Corporation shall mail the notice at least 15 days before
     the date the decreased Conversion Price takes effect.  The
     notice shall state the decreased Conversion Price and the
     period in which it will be in effect.  A decrease of the
     Conversion Price does not change or adjust the Conversion
     Price otherwise in effect for purposes of subparagraphs (1)
     or (2) of the eighth paragraph of this Paragraph (h).
     
               (i) Voting Rights.  The holders of 5% Preferred
     Stock will not have any voting rights except as set forth
     below or as otherwise from time to time required by law. 
     Whenever dividends on the 5% Preferred Stock or any other
     class or series of Parity Dividend Stock shall be in arrears
     in an amount equal to at least six quarterly dividends
     (whether or not consecutive), the holders of the 5%
     Preferred Stock (voting separately as a class with all other
     affected classes or series of the Parity Dividend Stock upon
     which like voting rights have been conferred and are
     exercisable) will be entitled to vote for and elect two
     directors of the Corporation (which directors shall be in
     addition to those directors then serving on the Board of
     Directors to the extent that the number of directors
     permitted by the Certificate is greater than the number of
     such directors then serving on the Board of Directors) at
     any meeting of stockholders of the Corporation at which
     directors are to be elected held during the period in which
     such dividends remain in arrears.  Whenever the right to
     elect directors shall have accrued to the holders of 5%
     Preferred Stock, the proper officers of the Corporation
     shall call a meeting for the election of such directors,
     such meeting to be held not less than 45 nor more than 90
     days after the accrual of such right.  The right of the
     holders of the 5% Preferred Stock to vote for two directors
     shall terminate when all accrued and unpaid dividends on the
     5% Preferred Stock have been declared and paid or set apart
     for payment.  The term of office of all directors so elected
     shall terminate immediately upon the termination of the
     right of the holders of the 5% Preferred Stock and such
     Parity Dividend Stock to vote for two directors.  In
     connection with such right to vote, each holder of 5%
     Preferred Stock will have one vote for each share held.
     
               Without the consent or affirmative vote of the
     holders of at least two-thirds of the outstanding shares of
     5% Preferred Stock, voting separately as a class with
     holders of any other class of the Corporation's preferred
     stock entitled to vote in such circumstances, the
     Corporation shall not authorize, create or issue any shares
     of any other class or series of Senior Dividend Stock or
     Senior Liquidation Stock.  The affirmative vote or consent
     of the holders of at least two-thirds of the outstanding
     shares of the 5% Preferred Stock, voting separately as a
     class with holders of any other class of preferred stock
     entitled to vote in such circumstances, will be required for
     any amendment, alteration or repeal, whether by merger or
     consolidation or otherwise, of the Certificate if the
     amendment, alteration or repeal would materially and
     adversely affect the powers, preferences or special rights
     of the 5% Preferred Stock.
     
               (j)  Outstanding Shares.  For purposes of this
     Certificate of Designations, all shares of 5% Preferred
     Stock shall be deemed outstanding except (i) from the date
     fixed for redemption pursuant to Paragraph (f) hereof, all
     shares of 5% Preferred Stock which have been so called for
     redemption under Paragraph (f) if the Common Stock or funds
     necessary for the redemption of such shares are available;
     (ii) from the date of surrender of certificates representing
     shares of 5% Preferred Stock, all shares of 5% Preferred
     Stock converted into Common Stock; and (iii) from the date
     of registration of transfer, all shares of 5% Preferred
     Stock held of record by the Corporation or any subsidiary of
     the Corporation.
     
               (k)  Partial Payments.  If at any time the
     Corporation does not pay amounts sufficient to redeem all 5%
     Preferred Stock called for redemption by the Corporation on
     the redemption date set pursuant to Paragraph (f) hereof,
     then such funds which are paid shall be applied to redeem
     such 5% Preferred Stock as the Corporation may designate by
     lot.
     
               (l)  Right of Action.  Notwithstanding any other
     provision of this Certificate of Designations, if the
     Corporation shall default in the payment of any amount
     required to be paid by it in respect of the 5% Preferred
     Stock, each holder of 5% Preferred Stock, individually,
     shall have a right to bring an action for payment.
     
           IN WITNESS WHEREOF, Ultramar Corporation has
     caused its corporate seal to be hereunto affixed and this
     certificate to be signed by Patrick J. Guarino, its Senior
     Vice President, General Counsel and Secretary, and attested
     by Gregory A. Robbins, its Assistant Secretary, this 3rd day
     of December, 1996.
         
                                   ULTRAMAR CORPORATION
     
                                   By: /s/ PATRICK J. GUARINO
         
                                       Patrick J. Guarino
                                       Senior Vice President,
                                       General Counsel and Secretary
     
    

     Attest:
     
     
     By: /s/ GREGORY A. ROBBINS
     
         Gregory A. Robbins
         Assistant Secretary
     
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