P.M.I. TRADING LIMITED
- --------------------------------------------------------------------------------

                                                             SEPTEMBER 28, 1998.
                                                                   DTIR-0273-98.


TO:        PENN OCTANE CORPORATION
ATT'N:     MR. J.B. RICHTER. / JORGE BRACAMONTES.
FAX:       (415) 368 1505. / 543 6837


P.M.I.  TRADING  LIMITED, IS PLEASED TO CONFIRM THE "LPG MIX" CONTRACT PURCHASE,
ACCORDING  TO  THE  FOLLOWING  TERMS  AND  CONDITIONS:

(1)  PMI ORDER NO.:  WILL  BE  INFORMED  MONTH  BY  MONTH  IN OUR FAX OPERATION.
                     PLEASE  REFER  IN  ALL  DOCUMENTS  TO  PMI'S  ORDER NUMBER.

(2)  BUYER:          P.M.I.  TRADING  LIMITED
                     ------------------------

     ADDRESS:        AV.  MARINA  NACIONAL  No.  329
                     TORRE  EJECUTIVA,  PISO  20
                     COL.  HUASTECA
                     11311  MEXICO,  D.F.

     COMMERCIAL  CONTACT
     -------------------

     NAME:           LEOPOLDO SIMON / LUIS FELIPE VACA / ISMAEL HERNANDEZ
     TELEPHONE No.:  (52-5) 227-0121 / 227-0169 / 227-0158
     TELEX  No.:     1773671 / 1773509
     FAX  No.:       (52-5) 227-0140 / (713) 567-0140

     OPERATIONS  CONTACT
     -------------------

     NAME:           VICTOR  GOMEZ  /  ELIN  VAZQUEZ  /  JUAN  ANTONIO  LIRA
     TELEPHONE No.:  (52-5)  227-0114  /  227-1049  /  227-0157
     TELEX  No.:     1773671  /  1773509
     FAX  No.:       (52-5)  227-0111  /  (713)  567-0111

     FINANCIAL  CONTACT
     ------------------

     NAME:           ARMANDO  CONTRERAS  /  FRANCISCO  CERVANTES
     TELEPHONE No.:  (52-5)  227-0073
     TELEX  No.:     1773671  /  1773509
     FAX  No.:       (52-5)  227-0072  /  (713)  567-0072

(3)  SELLER:         PENN  OCTANE  CORPORATION

     ADDRESS:        12118  SOUTH  BLOOMFIELD
                     SANTA  FE  SPRINGS,  CA  90670


- --------------------------------------------------------------------------------
AV. MARINA NACIONAL 329                                   TELEX:  1773669  PMIME
TORRE EJECUTIVA, PISO 20                                          FAX:  227-0140
COL. HUASTECA                                                     Tel.  227-0121
MEXICO. D.F. C.P.  11311                                          Tel.  227-0159


                                                                   DTIR-0273-98.
                                                                      Page no. 2

     COMMERCIAL  CONTACT
     -------------------

     NAME:           MR.  JORGE  R.  BRACAMONTES
     TELEPHONE No.:  (525)  687  6513  /  687  1189.
     FAX  No.:       (525)  543  6837.


     OPERATIONS  CONTACT
     -------------------

     NAME:           MR. JOE MARTINEZ.
     TELEPHONE No:   (210) 831 9442.
     FAX  No:        (210) 831 9447.


     FINANCIAL  CONTACT
     ------------------

     NAME:           MR. IAN BOTHWELL
     TELEPHONE No.:  (562) 929 1984.
     FAX  No.:       (562) 929 1921.

(4)  GENERAL AGREEMENT
     -----------------

     4.1.  SUBJECT TO ALL TERMS AND  CONDITIONS OF THIS  AGREEMENT,  BUYER SHALL
     PURCHASE  "LPG MIX" (AS HEREIN  DEFINED)  FROM SELLER AND SELLER  AGREES TO
     SELL "LPG MIX" TO BUYER UNDER THE TERMS OF THIS AGREEMENT.  AS USED IN THIS
     AGREEMENT,  "LPG MIX" IS A PROPANE/BUTANE  PRODUCT MIXTURE CONSISTING OF 90
     PERCENT PROPANE AND 10 PERCENT COMMERCIAL BUTANE.

     4.2.     COMMERCIAL  TERMS:
              ------------------

     EXW  (EX  WORKS)  BROWNSVILLE,  TEXAS  AT  PENN  OCTANE'S  LOADING  RACK IN
     ACCORDANCE WITH INCOTERMS 1990.

(5)  TERM
     ----

     UNLESS EITHER PARTY BREACHES ITS OBLIGATION UNDER THIS AGREEMENT,  THE TERM
     SHALL BE ONE YEAR  COMMENCING  ON  OCTOBER  1ST,  1998  AND  CONCLUDING  ON
     SEPTEMBER 30, 1999.

     IN CASE SELLER OBTAINS LEGAL RIGHTS TO IMPORT PROPANE INTO MEXICO OR/AND IF
     BURGOS  BASIN STARTS  PRODUCING,  THEN EITHER PARTY SHALL HAVE THE RIGHT TO
     NOTIFY THE OTHER PARTY ITS  INTENTION TO BEGIN A  RENEGOTIATION  PROCESS OF
     THIS CONTACT.  SUCH RENEGOTIATION PROCESS SHALL START NO LATER THAN 10 DAYS
     AFTER THE NOTIFICATION IS GIVEN.  RENEGOTIATION PROCESS CAN NOT ENDURE MORE
     THAN 90 DAYS. IF AN AGREEMENT IS REACHED DURING THE  RENEGOTIATION  PROCESS
     THIS  CONTACT  SHALL BE MODIFIED BY MUTUALLY  AGREEMENT,  OTHERWISE  EITHER
     PARTY SHALL HAVE THE RIGHT TO CANCEL.


                                                                   DTIR-0273-98.
                                                                      Page no. 3

(6)  VOLUMES
     -------

     6.1.  BUYER WILL  SCHEDULE,  PURCHASE AND ACCEPT AND SELLER WILL DELIVER AN
     ANNUAL VOLUME OF "LPG MIX" EQUAL TO  81,180,000  GALLONS +/- 15% AT BUYER'S
     OPTION, COMPLYING WITH THE FOLLOWING MINIMUM MONTHLY VOLUMES:

     WINTER  SEASON     MINIMUM  7,500,000  GALLONS  PER  MONTH.
     SUMMER  SEASON     MINIMUM  4,000,000  GALLONS  PER  MONTH.

     SUCH  VOLUMES  TO  BE  REFERRED  HEREIN  AS  "MINIMUM  MONTHLY  VOLUME"
                                                   ------------------------

                SEASONALITY  IS  DEFINED  AS  DESCRIBED  BELOW:
                -----------------------------------------------

     WINTER  SEASON  SHALL MEAN THE PERIOD FROM OCTOBER 1998 THROUGH MARCH 1999.
     --------------

     SUMMER  SEASON  SHALL  MEAN  THE  PERIOD FROM APRIL 1999 THROUGH STEPTEMBER
     --------------
     1999.

     6.2 NOTWITHSTANDING THE FOREGOING,  BUYER MAY REQUEST ADDITIONAL VOLUMES TO
     THE  MINIMUM  MONTHLY  VOLUME,  IN ANY MONTH.  SUCH  VOLUMES TO BE REFERRED
     HEREIN AS "ADDITIONAL VOLUME".
                -----------------

     EXCEPT FOR THE SCHEDULE OF THE "MINIMUM  MONTHLY VOLUME" OF THIS AGREEMENT,
     AT LEAST SEVEN (7) DAYS PRIOR TO EACH MONTH,  BUYER SHALL  SUBMIT TO SELLER
     AN ADDITIONAL  VOLUME REQUEST.  THE SUM OF THE "MINIMUM MONTHLY VOLUME" AND
     THE  "ADDITIONAL  VOLUME"  SHALL BE DEFINED AS "MONTHLY  NOMINATED  VOLUME"
                                                     --------------------------

     6.3 BUYER SHALL PROVIDE  SELLER WITH A THREE MONTH  FORECAST,  FOR "MONTHLY
     NOMINATED  VOLUMES" TO BE SCHEDULED WITH A RANGE OF +/- 15% BUYER'S OPTION.
     SELLER WILL ACCEPT AND DELIVER TO BUYER THE ADDITIONAL  VOLUME REQUESTED AT
     LEAST BETWEEN THE 15% RANGE OF BUYER'S THREE MONTH FORECAST.

     6.4 BUYER  WILL  SCHEDULE  ITS  LIFTING  OF "LPG MIX" WITH  SELLER FOR EACH
     DELIVERY  MONTH AT LEAST SEVEN NATURAL DAYS BEFORE THE  BEGINNING  MONTH OF
     DELIVERIES.

     6.5.  BUYER WILL  ACCEPT  DELIVERY  OF THE "LPG MIX" VIA TRUCK AT  SELLER'S
     TERMINAL IN  BROWNSVILLE,  TEXAS (THE  TERMINAL) AS SCHEDULED BY BUYER,  AS
     LONG AS IT MEETS THE SPECS DESCRIBED IN ATTACHMENT "A".

(7)  PRICE OF "LPG MIX"
     -----------------

     7.1.  PRICE  FORMULA FOR  PROPANE AND BUTANE  SHALL BE BASED ON THE MONTHLY
     AVERAGE OF THE DELIVERY MONTH, AS PUBLISHED BY OPIS (OIL PRICE  INFORMATION
     SERVICE)  UNDER MT.  BELVIEU  NON-TET SPOT POSTINGS FOR 90% PROPANE AND 10%
     N-BUTANE,  PLUS A SERVICE COST TO BE DETERMINED IN ACCORDANCE WITH CLAUSE 8
     OF THIS AGREEMENT.

     7.2. THE  ESTIMATED  PRICE FOR  TEMPORARY  INVOICING  PURPOSES  WILL BE THE
     POSTING PRICE OF THE FIFTH DAY QUOTATIONS PRIOR OF THE DELIVERY MONTH, PLUS
     THE  SERVICE  COSTS OF  x.xxxx  USD/GAL.  AFTER  DELIVERY  MONTH  ENDS,  AN
     ADJUSTMENT  SHALL BE MADE (AS  DESCRIBED IN  PARAGRAPH  9.2 BELOW) SO AS TO
     REFLECT THE FINAL PRICE COMPUTED AS PER SUBCLAUSE 7.1.


                                                                   DTIR-0273-98.
                                                                      Page no. 4

(8)  SERVICE COST DETERMINATION
     --------------------------

     8.1. WHEN BUYER LIFTS THE "MINIMUM  MONTHLY VOLUME" OR LESS OF THE "MINIMUM
     MONTHLY VOLUME", BUYER SHALL PAY TO SELLER A SERVICE COST OF:

     (i)     USD  xxx,xxx.xx  -  PER  MONTH  DURING  WINTER  SEASON  MONTHS.
     (ii)    USD  xxx,xxx.xx  -  PER  MONTH  DURING  SUMMER  SEASON  MONTHS.

     THESE AMOUNTS REFLECT A SERVICE COST OF x.xxxx  USD/GAL.  FOR EACH "MINIMUM
     MONTHLY VOLUME".

     8.2 IF THE  ACTUAL  VOLUME  LIFTED AT THE END OF ANY MONTH IS LESS THAN THE
     "MINIMUM  MONTHLY VOLUME" DUE TO: A) OPERATIVE  PROBLEMS AT THE BROWNSVILLE
     TERMINAL  OWNED BY PENN OCTANE OR AT THE PIPELINE OR B) SHORTAGE OF PRODUCT
     AT THE BROWNSVILLE  TERMINAL,  THEN THE SERVICE COSTS FOR THE ACTUAL VOLUME
     LIFTED SHOULD BE x.xxxx USD/GAL.

     8.3 IF THE  ACTUAL  VOLUME  LIFTED AT THE END OF ANY MONTH IS LESS THAN THE
     "MONTHLY  NOMINATED  VOLUME"  (MINUS)  -10%  DUE  TO:  A)  CLOSURE  OF  THE
     US-MEXICAN BOARDER OR B) ANY CAUSE BEYOND EITHER PARTY RESPONSIBILITY, THEN
     THE SERVICES COSTS FOR THE TOTAL VOLUME LIFTED SHOULD BE x.xxxx USD/GAL.

     8.4 IF THE  ACTUAL  VOLUME  LIFTED AT THE END OF ANY MONTH IS LESS THAN THE
     "MONTHLY NOMINATED VOLUME" (MINUS) -10% DUE TO A) OPERATIVE PROBLEMS AT THE
     BROWNSVILLE TERMINAL OWNED BY PENN OCTANE OR AT THE PIPELINE OR B) SHORTAGE
     OF PRODUCT AT THE BROWNSVILLE  TERMINAL, OR IF THE VOLUME LIFTED AT THE END
     OF ANY MONTH IS WITHIN THE RANGE OF THE "MONTHLY NOMINATED VOLUME" +/- 10%.
     THEN  BUYER  SHALL  PAY TO  SELLER  A  SERVICE  COST  CORRESPONDING  TO THE
     DIFFERENTIAL  VOLUME  BETWEEN  THE  MINIMUM  MONTHLY  VOLUME AND THE ACTUAL
     VOLUME LIFTED  (ATTACHMENT  "B").  SUCH SERVICE COST FOR ADDITIONAL  VOLUME
     SHALL BE COMPUTED AS FOLLOWS:

     CSF  =  x.xxxx USD/GAL LESS ADJ.

     WHERE
     CSF  =  SERVICE  COST  FOR  ADDITIONAL  VOLUMES.
     ADJ  =  ADJUSTMENT  FOR  THE  INCREMENTAL  VOLUME.

     WHERE

     ADJ  =  [x.xxxxUSD/GAL - (x.xxxx * MMV)] / 2
                               ------------
                                   AVL

     THUS

     ADJ  =  [x.xxxx * (1 - MMV)] / 2
                            ---
                            AVL
     THUS

     ADJ  =  x.xxxxx * (1 - MMV) / 2
                            ---
                            AVL
     WHERE


                                                                   DTIR-0273-98.
                                                                      Page no. 5

     MMV  =  MINIMUM  MONTHLY  VOLUME.
     AVL  =  ACTUAL  VOLUME  LIFTED  DURING  THE  DELIVERY  MONTH.

     8.5 IF THE ACTUAL  VOLUME LIFTED AT THE END OF ANY MONTH IS HIGHER THAN THE
     MONTHLY  NOMINATED  VOLUME  (PLUS) + 10%,  THEN THE  SERVICE  COSTS FOR THE
     GALLONS EXCEEDING THE "MONTHLY  NOMINATED VOLUME" +10% SHOULD BE NEGOTIATED
     BETWEEN SELLER AND BUYER. SUCH NEGOTIATION SHOULD NOT EXCEED 3 WORKING DAYS
     UPON NOTICE FROM BUYER TO SELLER.

(9)  INVOICING
     ---------

     9.1.  SELLER  WILL  INVOICE  BUYER EVERY WEEK FOR THE TOTAL  VOLUME  LOADED
     DURING THE IMMEDIATELY PRECEDING WEEK.

     9.2. THE PRICE PER GALLON  INVOICED  WILL BE,  ACCORDING  TO THE  ESTIMATED
     PRICE AS DESCRIBED IN SUBCLAUSE  7.2. THE  ADJUSTMENT  FOR THE ACTUAL PRICE
     AND SERVICE COST SHOULD BE INVOICED THROUGH  DEBIT/CREDIT NOTES TO BUYER IN
     THE FIRST WEEK OF THE FOLLOWING MONTH TO DELIVERY MONTH.

     9.3.  ALL  THE  INVOICES  MUST  COMPLY  WITH  BUYER'S  TREASURY  DEPARTMENT
     INSTRUCTIONS   AND   SHALL   BE   SENT   TO  THE   ATTENTION   OF   ARMANDO
     CONTRERAS/FRANCISCO CERVANTES.

(10) PAYMENT TERMS
     -------------

     FULL NET CASH IN U.S.  DOLLARS PAYABLE WITH 12 DAYS AFTER ORIGINAL  INVOICE
     IN HARD COPY IS RECEIVED BY BUYER IN ITS OFFICES,  TREASURY DEPARTMENT (AV.
     MARINA NACIONAL 329, TORRE EJECUTIVA PISO 20).

     A FAX TRANSMISSION OF THE CORRESPONDING INVOICE WILL BE ACCEPTABLE TO BUYER
     IN ORDER TO REVIEW IT AS SOON AS POSSIBLE AND TO ASSURE  PROMPT  PAYMENT AS
     OUTLINED IN THE ABOVE  PARAGRAPH TO SELLER,  IN ACCORDANCE WITH THE PAYMENT
     TERMS HEREIN AGREED. HOWEVER,  ORIGINAL INVOICE MUST BE RECEIVED AT LEAST 7
     DAYS PRIOR TO PAYMENT DUE DATE.

     IN CASE  THAT THE  PAYMENT  DATE  FALLS ON A SUNDAY  OR  HOLIDAY,  THEN THE
     PAYMENT DATE WILL BE THE NEXT WORKING  DATE.  IN CASE THAT THE PAYMENT DATE
     FALLS ON A SATURDAY, THEN THE PAYMENT DATE WILL BE THE PRIOR WORKING DATE.

(11) OFFICE EXPENSE
     --------------

     SELLER SHOULD PROVIDE TELEPHONE, TELEFAX, CLEANING SERVICES AND SECRETARIAL
     EXPENSES INCURRED BY PEMEX GAS  REPRESENTATIVES  SUPERVISING RECEIPT OF THE
     "LPG MIX" DELIVERIES AT THE TEMRINAL.  SELLER SHALL INVOICE x,xxx USD EVERY
     MONTH FOR THOSE  SERVICES  AT THE END OF EACH  MONTH,  AND BUYER  SHALL PAY
     FIFTEEN  DAYS AFTER  INVOICE  RECEIPT AS PER  BUYER'S  TREASURY  DEPARTMENT
     INSTRUCTIONS.


                                                                   DTIR-0273-98.
                                                                      Page no. 6

     IF THE PAYMENT DATE IS A WEEKEND OR HOLIDAY,  PAYMENT  SHALL BE MADE ON THE
     NEXT BUSINESS DAY.

(12) SCHEDULE OF SERVICE
     -------------------

     12.1.  SELLER WILL PROVIDE  LOADING  SERVICES AT THE TERMINAL  SEVEN DAYS A
     WEEK,  TWENTY-FOUR HOURS PER DAY. HOWEVER HOURS OF SERVICE SHALL BE SUBJECT
     TO AVAILABILITY OF BUYER'S  AUTHORIZED  PERSON(S) TO DISPATCH THE "LPG MIX"
     FROM THE TERMINAL.

     12.2.  SELLER WILL PROVIDE BUYER A DAILY  ACTIVITY  REPORT  SPECIFYING  THE
     QUANTITY  (WEIGHT AND VOLUME)  AND  QUALITY OF THE "LPG MIX"  DELIVERED  TO
     BUYER AT THE TERMINAL, AS PER INDEPENDENT INSPECTOR REPORTS.

(13) QUALITY
     -------

     THE  "LPG  MIX"  SHALL  MEET  THE  SPECIFICATIONS  ATTACHED  AS EXHIBIT "A"

(14) MEASUREMENT
     -----------

     14.1 THE QUANTITY OF PRODUCT  DELIVERED  SHALL BE DETERMINED BY NET WEIGHT,
     AND FOR PAYMENT  PURPOSES,  THE WEIGHT OF THE "LPG MIX"  DELIVERED TO BUYER
     WILL BE  CONVERTED  TO VOLUME  (CORRECTED  TO 60 F) VIA ANALYSIS OF SAMPLES
     USING A GAS CHROMATOGRAPH.  THE CHROMATOGRAPH MUST BE CALIBRATED  ACCORDING
     TO THE ASTM AND GPA PROCEDURES.  BUYER AND SELLER WILL CAUSE AN INDEPENDENT
     INSPECTOR,  MUTUALLY AGREED BY THE PARTIES, TO SAMPLE AND ANALYZE EACH LOAD
     OF THE "LPG MIX". THE COST OF SUCH INSPECTIONS WILL BE BORNED BY BUYER.

     14.2.  BEFORE  ENTERING THE TERMINAL,  EMPTY TRUCKS WILL BE WEIGHTED AT THE
     PORT OF BROWNSVILLE  PUBLIC SCALES OR OTHER SCALE  MUTUALLY  AGREED BY BOTH
     PARTIES.  LOADED  TRUCK WILL BE WEIGHTED AT THE SAME SCALE UPON  DEPARTURE.
     THE VOLUME  OBTAINED BY THE  DIFFERENTIAL  BETWEEN  THESE TWO  MEASUREMENTS
     SHALL BE THE VOLUME TO BE INVOICED  BY SELLER AND PAID BY BUYER.  THE SCALE
     WILL BE TESTED  AND  ADJUSTED  TO  ACCURACY  AT LEAST ONCE EVERY 30 DAYS OR
     ACCORDING  TO  GOVERNMENT  REGULATIONS.  THE COSTS OF  WEIGHTING  THE TRUCK
     BEFORE AND AFTER  LOADING,  AND/OR IF A THIRD  PARTY IS REQUIRED TO TEST OR
     CALIBRATE THE SCALE,  WILL BE SHARED BY THE PARTIES ON A 50%/50% BASIS.  IF
     SELLER, AT ANY TIME, INSTALLS SCALES AT THE TERMINAL,  THEY WILL THEREAFTER
     BE THE SCALES FOR ALL TRUCKS RECEIVING "LPG MIX" AT THE TERMINAL,  AND THEY
     SHOULD BE OPERATED AND MAINTAINED IN ACCORDANCE WITH THE ABOVE  PROVISIONS.
     THE CHARGE FOR SUCH SCALES SHALL BE 100% FOR SELLERS ACCOUNT.

     IF SELLER'S  SCALE IS USED,  THEN BUYER SHALL HAVE THE RIGHT TO SEND TRUCKS
     TO AN  INDEPENDENT  SCALE IN A RANDOMLY BASIS EVERY WEEK, IN ORDER TO CHECK
     SELLER'S  SCALE  ACCURACY.  COST OF  INDEPENDENT  SCALE SHALL BE ON BUYER'S
     ACCOUNT.


                                                                   DTIR-0273-98.
                                                                      Page no. 7

(15) TITLE AND RISK
    ---------------

     TITLE AND RISK OF LOSS OF THE "LPG  MIX" WILL PASS FROM  SELLER TO BUYER AT
     OUTLET FLANGE OF THE TRUCK AT THE LOADING RACKS LOCATED AT THE TERMINAL. AT
     SUCH POINT, THE "LPG MIX" SHALL BE DEEMED TO BE DELIVERED.

(16) LAW AND ARBITRATION
     -------------------

     THE AGREEMENT  SHALL BE GOVERNED BY AND  INTERPRETED IN ACCORDANCE WITH THE
     LAWS OF THE STATE OF NEW YORK.  ALL DISPUTES  ARISING OUT OF OR RELATING TO
     THE  AGREEMENT  SHALL BE SETTLED BY FINAL  ARBITRATION  IN THE STATE OF NEW
     YORK,  CITY OF N.Y.  CONDUCTED IN ACCORDANCE WITH THE RULES OF CONCILIATION
     AND ARBITRATION OF THE AMERICAN  ARBITRATION  ASSOCIATION IN EFFECT AT SUCH
     TIME. THE NUMBER OF ARBITRATORS SHALL BE THREE.

(17) SPILL/ENVIRONMENTAL POLLUTION
     -----------------------------

     IN THE  EVENT OF ANY "LPG  MIX"  SPILL  OR  OTHER  ENVIRONMENTAL  POLLUTING
     DISCHARGE OCCURS PRIOR TO DELIVERY, AS THE SAME IS DEFINED IN ARTICLE 15 OF
     THIS  AGREEMENT,  ALL  CLEAN-UP  OPERATIONS  THAT  MAY BE  REQUIRED  BY ANY
     GOVERNMENTAL AUTHORITIES, SHALL BE FOR SELLER'S ACCOUNT.

     IF SUCH SPILL OR ENVIRONMENTAL  POLLUTING  DISCHARGE OCCURS AFTER DELIVERY,
     AS THE SAME IS  DEFINED  IN  ARTICLE  15 OF THIS  AGREEMENT,  ALL  CLEAN-UP
     OPERATIONS THAT MAY BE REQUIRED, SHALL BE FOR BUYER'S ACCOUNT.

     IN THE EVEN THAT SUCH SPILL OR  ENVIRONMENTAL  POLLUTING  DISCHARGE  OCCURS
     AFTER  DELIVERY,  AT THE  TERMINAL,  BUYER  AUTHORIZES  SELLER TO  COMMENCE
     CONTAINMENT  OR CLEAN-UP  OPERATIONS AS DEEMED  APPROPRIATE OR NECESSARY BY
     SELLER OR AS MAY BE REQUIRED BY ANY GOVERNMENTAL  AUTHORITIES.  SELLER WILL
     NOTIFY BUYER IMMEDIATELY OF SUCH OPERATIONS. SELLER SHALL HAVE THE RIGHT TO
     DIRECT ALL  CONTAINMENT AND CLEAN-UP  OPERATIONS.  ALL COSTS OF CONTAINMENT
     AND  CLEAN-UP  FOR SUCH  SPILL  WILL BE BORNE BY  BUYER,  AND  BUYER  SHALL
     INDEMNIFY  AND HOLD  SELLER  HARMLESS  FROM ANY AND ALL  EXPENSES,  CLAIMS,
     LIABILITIES,  DAMAGES, PENALTIES, FINES AND OTHER COST (INCLUDING,  WITHOUT
     LIMITATION,   ATTORNEYS  FEES)  RESULTING  OR  RELATED  TO  SUCH  INCIDENT.
     FOLLOWING  THE  INDEMNITY OF SELLER BY BUYER,  SELLER WILL  COOPERATE  WITH
     BUYER FOR THE  PURPOSE  OF  OBTAINING  REIMBURSEMENT  IN THE EVENT THAT ANY
     NON-AGENT  THIRD  PARTY IS LEGALLY  RESPONSIBLE  FOR ANY COSTS OR  EXPENSES
     BORNE BY BUYER UNDER THIS PARAGRAPH.

     IN THE EVENT THAT SUCH SPILL OR  ENVIRONMENTAL  POLLUTING  DISCHARGE OCCURS
     AFTER DELIVERY, OUT OF THE TERMINAL, BUYER MAY AUTHORIZE SELLER TO COMMENCE
     CONTAINMENT  OR CLEAN-UP  OPERATIONS AS DEEMED  APPROPRIATE OR NECESSARY BY
     SELLER OR AS MAY BE REQUIRED BY ANY GOVERNMENTAL  AUTHORITIES.  SELLER WILL
     NOTIFY BUYER IMMEDIATELY OF SUCH OPERATIONS. SELLER SHALL HAVE THE RIGHT TO


                                                                   DTIR-0273-98.
                                                                      Page no. 8

     DIRECT ALL  CONTAINMENT AND CLEAN-UP  OPERATIONS.  ALL COSTS OF CONTAINMENT
     AND  CLEAN-UP  FOR SUCH  SPILL  WILL BE BORNE BY  BUYER,  AND  BUYER  SHALL
     INDEMNIFY  AND HOLD  SELLER  HARMLESS  FROM ANY AND ALL  EXPENSES,  CLAIMS,
     LIABILITIES,  DAMAGES, PENALTIES, FINES AND OTHER COST (INCLUDING,  WITHOUT
     LIMITATION,   ATTORNEYS  FEES)  RESULTING  OR  RELATED  TO  SUCH  INCIDENT.
     FOLLOWING  THE  INDEMNITY OF SELLER BY BUYER,  SELLER WILL  COOPERATE  WITH
     BUYER FOR THE  PURPOSE  OF  OBTAINING  REIMBURSEMENT  IN THE EVENT THAT ANY
     NON-AGENT  THIRD  PARTY IS LEGALLY  RESPONSIBLE  FOR ANY COSTS OR  EXPENSES
     BORNE BY BUYER UNDER THIS PARAGRAPH.

(18) SAFETY
     ------

     BUYER WILL  COMPLY,  AND WILL CAUSE  BUYER'S  EMPLOYEES,  AGENTS AND OTHERS
     ENTERING  THE  TERMINAL  ON BEHALF OF BUYER TO  COMPLY,  WITH ALL  TERMINAL
     SAFETY AND HEALTH  REGULATIONS.  SELLER WILL EXECUTE IN ITS NAME,  PAY FOR,
     AND FURNISH TO BUYER PRIOR TO ACCEPTING ANY "LPG MIX" AT THE TERMINAL,  ALL
     INFORMATION (INCLUDING APPLICABLE MATERIAL DATA SHEETS), DOCUMENTS, LABELS,
     PLACARDS,  CONTAINERS,  AND OTHER  MATERIALS  WHICH MAY BE  REQUIRED  TO BE
     FURNISHED BY BUYER BY STATUTES,  ORDINANCES,  RULES OR  REGULATIONS  OF ANY
     PUBLIC AUTHORITY RELATING TO THE DESCRIBING, PACKAGING, RECEIVING, STORING,
     HANDLING, OR SHIPPING OF THE "LPG MIX" AT OR FROM THE TERMINAL.

(19) FORCE MAJEURE
    --------------

     NEITHER  PARTY SHALL BE LIABLE FOR FAILURE OR DELAY IN THE  PERFORMANCE  OF
     THIS  AGREEMENT  DUE  TO  ACTS  OF  GOD,  EARTHQUAKE,   FLOOD,  FIRE,  WAR,
     HOSTILITIES, CIVIL COMMOTIONS,  GOVERNMENTAL ACTS, STRIKES,  TRANSPORTATION
     PROBLEMS,  PIPELINE  STOPPED DUE TO LEAK OR  EXPLOSION  AND ANY OTHER CAUSE
     BEYOND THE CONTROL OF EITHER OF THE PARTIES.

     ANY PARTY  CLAIMING  FORCE MAJEURE SHALL  PROMPTLY  NOTIFY THE OTHER OF THE
     OCCURRENCE OF THE EVENT OF FORCE MAJEURE RELIED UPON.

     EVENTS OF FORCE MAJEURE SHALL NOT RELIEVE ANY PARTY FROM MAKING ANY PAYMENT
     FOR PRODUCT DELIVERED AND/OR SERVICE RENDERED HEREUNDER.


(20) LIMITATION OF LIABILITY
     -----------------------

     SELLER  SHALL NOT BE LIABLE  FOR MORE THAN THE ACTUAL  COST TO REPLACE  ANY
     "LPG MIX" NOT  DELIVERED  HEREUNDER.  NEITHER  PARTY  SHALL BE  LIABLE  FOR
     SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES.


(21) MISCELLANEOUS
     -------------

     21.1.  AMENDMENTS,  WAIVER.  THIS AGREEMENT MAY NOT BE CHANGED OR MODIFIED,
            -------------------
     EXCEPT IN WRITING BY MUTUAL  AGREEMENT OF BOTH PARTIES.  THE FAILURE OF ANY
     PARTY  TO  ENFORCE  ANY OF THE  PROVISIONS  OF THIS  AGREEMENT  WILL NOT BE
     CONSTRUED TO BE A WAIVER OF THOSE  PROVISIONS,  OR A WAIVER OF THE RIGHT OF
     ANY PARTY TO ENFORCE THEM.


                                                                   DTIR-0273-98.
                                                                      Page no. 9

     21.2  SEVERABILITY.  IF ANY PROVISION OF THIS AGREEMENT IS DETERMINED TO BE
           ------------
     INVALID OR  UNENFORCEABLE,  THE REMAINDER OF THIS AGREEMENT SHALL REMAIN IN
     FULL FORCE AND EFFECT.

     21.3 ASSIGNMENT.  NEITHER PARTY MAY ASSIGN THIS AGREEMENT OR ANY PORTION OF
          ----------
     IT WITHOUT THE PRIOR WRITTEN CONSENT OF THE OTHER PARTY.

     21.4 OTHER  TERMS AND  CONDITIONS.  WHERE NOT IN  CONFLICT  WITH THE ABOVE,
          ----------------------------
     INCOTERMS 1990 FOR EXW TRANSACTIONS WITH LATEST AMENDMENTS SHALL APPLY.

     THE UNITED NATIONS  CONVENTION ON CONTRACTS FOR THE  INTERNATIONAL  SALE OF
     GOODS SHALL NOT APPLY TO THIS CONTRACT.

     21.5.  ENTIRE  AGREEMENT.  THIS AGREEMENT  CONSTITUTES THE ENTIRE AGREEMENT
            -----------------
     AMONG THE PARTIES AND SUPERSEDES ALL PREVIOUS NEGOTIATIONS, COMMITMENTS AND
     WRITINGS WITH RESPECT TO SUCH SUBJECT MATTER OF THIS AGREEMENT.



(22) CONFIDENTIALITY
     ---------------

     THIS AGREEMENT TO BE HELD STRICTLY  PRIVATE AND CONFIDENTIAL BY ALL PARTIES
     INVOLVED.


     IF THIS MEETS WITH YOUR  UNDERSTANDING  AND  APPROVAL,  PLEASE  SIGN IN THE
     APPROPRIATE SPACE.




                       BUYER                       SELLER




                 LEOPOLDO  SIMON             JORGE  BRACAMONTES
              PMI  TRADING  LIMITED       PENN  OCTANE  CORPORATION



LFVG/MOGP


                                                                   DTIR-0273-98.
                                                                     Page no. 10


                                   EXHIBIT "A"




GPM MIX CHARACTERISTICS              MAX          TEST METHODS
                                        
COMPOSITION
PROPANE/BUTANE 90/10 PCT OF VOL

ETHANE                                    20  PCT. VOL. OF PROPANE
PROPYLENE                                5.0  PCT. VOL. OF PROPANE
PENTANES & HEAVIES                       2.0  PCT. VOL. OF BUTANE
VAPOR PRESSURE                           190  ASTM D-1267-75
CHROMATOGRAPH ANALYSIS                        ASTM D-2163
SPECIFIC GRAVITY                              ASTM D-1657
CORROSION COPPER STRIP AT 100
  F. DEG                                  1B  ASTM D-1638-74
OTHER DELETERIONS SUBSTANCES            NONE



                                                                   DTIR-0273-98.
                                                                     Page no. 11
                                   EXHIBIT "B"

PRICE  FORMULA  AND  SERVICE  COST  DETERMINATION
- -------------------------------------------------

                    ------------------------------------------------------------
Month:              |Price  formula for C3 AND C4 shall be based on the monthly|
- ---------------     |average  of  the  delivery month,  published by OPIS  Mont|
PMI  Order  No:     |Belvieu NON-TET spot  posting  for  90%  Propane  and  10%|
- ---------------     |Burtane,  plus  the  service  costs.                      |
                    ------------------------------------------------------------



A)  ESTIMATED PRICE FOR INVOICES: The fifth day quotations prior of the delivery
    month,  plus  the  service  costs

Calculation  date,  for  the  Estimated  Price  Invoice:   0-Jan-00
                                                          ---------



                                              
 Propane Price           0.9  Butane Price  0.1
 USCTS/GAL      USD/GAL       USCTS/GAL          USD/GAL    SC
         0.000  0.00000              0.000   +   0.00000  x.xxxxx  x.xxxxx USD/GAL
- -----           -----                                                           


B)  CLAUSE  8.2  SERVICE  COST  FORMULA,  if  buyer  lift  more than the minimum
    monthly  volume:

Formula:  CSF = X.XXXXUSD/GAL - ADJ

          Where:     CSF:  Service  Cost  for  Additional  Volume.
          AVL:       Adjustment  for  the  Incremental  Volume  Lifted.

Where:    ADJ = [X.XXXXUSD/GAL - (X.XXXX * MMV)] / 2
                                           ---
                                           AVL

          Where:     MMV:  Minimum  Monthly  Volume.
          AVL:       Actual  Volume  Lifted  during  the  delivery  Month.


MMV Minimum Monthly Volume:   7,500,000 GAL
AVL Actual Volume Lifted:             0 GAL
                              ---------
Service Costs Minimum Volume:   x.xxxxx USD/GAL.
Propane Monthly Average:          0.000 USCTS/GAL.    For 90%    0.00000 USD/GAL
                              ---------
Butane Monthly Average:           0.000 USCTS/GAL.    For 10%    0.00000 USD/GAL
                              ---------                          ---------------
COMMODITY PRICE FORMULA                                          0.00000 USD/GAL
                                                                 ===============

CSF  SERVICE  COST  FORMULA
- ---------------------------

- -------------------------------------------
| ADJ[x.xxxx/2] | *[MMV/AVL]-1 | EQUAL TO |  +  x.xxxxx  EQUAL         CSF
|               |              |          |                     ----------------
|   x.xxxxx     |   #DIV/01    | #DIV/01  |                     #DIV/01  USD/GAL
- -------------------------------------------                     ================

                                           GALLONS   USD/GAL
PRICE  FOR  MINIMUM  MONTHLY  VOLUME:    7,500,000   x.xxxxx   xxx,xxx.xx   USD
PRICE  FOR  ACTUAL  VOLUME  LIFTED:     -7,500,000   #DIV/01   #DIV/01      USD

PRICE  IN  USD  /  GAL  FOR  THE  CURRENT  MONTH:              #DIV/01  USD/GAL

TOTAL  PRICE  FOR  THE  CURRENT  MONTH:       0.00             #DIV/01  USD