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


                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934


      Date of Report (Date of earliest event reported): September 30, 2004


                            PENN OCTANE CORPORATION
             (Exact name of registrant as specified in its charter)


      Delaware                     000-24394                52-1790357
      (State of                    (Commission              (IRS Employer
      Incorporation)               File Number)             Identification No.)


      77-530 Enfield Land, Bldg D
      Palm Desert, California                               92211
      (Address of principal executive offices)              (Zip Code)

                                 (760) 772-9080
              (Registrant's telephone number, including area code)

                                       N/A
          (Former Name or Former Address, if Changed Since Last Report)


     Check  the  appropriate  box  below  if  the Form 8-K filing is intended to
simultaneously  satisfy the filing obligation of the registrant under any of the
following  provisions  (see  General  Instruction  A.2.  below):

   [ ]  Written communications pursuant to Rule 425 under the Securities Act (17
        CFR  230.425)

   [ ]  Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17
        CFR  240.14a-12)

   [ ]  Pre-commencement  communications  pursuant  to  Rule  14d-2(b) under the
        Exchange  Act  (17  CFR  240.14d-2(b))

   [ ]  Pre-commencement  communications  pursuant  to  Rule  13e-4(c) under the
        Exchange  Act  (17  CFR  240.13e-4(c))


                                        1

ITEM 2.01.  COMPLETION OF ACQUISITION OR DISPOSITION OF ASSETS

     On  September  30,  2004,  Penn  Octane  Corporation  ("Penn Octane" or the
"Company")  completed  the transfer of a major portion of its physical assets to
the  operating  subsidiary  of  Rio  Vista  Energy  Partners L.P. ("Rio Vista"),
followed immediately by the distribution to Penn Octane's common stockholders of
Penn  Octane's  100%  common  units  of  Rio  Vista,  previously  a wholly-owned
subsidiary  of  Penn  Octane,  in  accordance  with  the  description  of  such
transactions  contained  in  the  registration statement on Form 10 filed by Rio
Vista with the Securities and Exchange Commission ("SEC") on August 26, 2004, as
amended by Amendment No. 1 thereto filed with the SEC on September 16, 2004 (SEC
File  No.  000-50394)  (the  "Form  10").  The  transfer  of such assets and the
distribution of the Rio Vista common units were conducted in accordance with the
terms  of  the  Distribution  Agreement,  the  Omnibus  Agreement,  the Purchase
Agreement for LPG, the Contribution, Conveyance and Assumption Agreement and the
Conveyance  Agreement  described  in  Penn  Octane's  Current Report on Form 8-K
("Prior  Form  8-K")  filed  by  Penn Octane with the SEC on September 22, 2004.
Penn  Octane  retained  its  2%  general  partner  interest  in  Rio  Vista.

TRANSFERRED ASSETS

     The  following  assets  of  Penn  Octane  were transferred to the operating
subsidiary of Rio Vista effective as of 4:58 p.m. on September 30, 2004:

Brownsville Terminal Facilities:
     Building
     LPG Terminal facilities
     Tank Farm
     Leasehold improvements
     Capital construction in progress
     Equipment

US Pipelines and Rights Of Way:
     6" and 8" (Brownsville  terminal to US Border)
     Various rights of way obtained in connection with operation of US Pipelines
       between  Brownsville  Terminal  and  US  Border
Other:
     Land  acquired  in  Brownsville  in  vicinity  of  the US Pipelines between
     Brownsville
       Terminal  and  US  border
     Inventory  located  in  storage  tanks and pipelines located in Brownsville
       (and  extending  to  storage  and pipelines located in assets held by the
       Mexican  subsidiaries)


                                        2

Contracts and Leases (assumed and/or assigned):
     Lease  Agreements
          Port  of  Brownsville
               LPG  Terminal  Facility
               Tank  Farm  Lease
     US  State  Department  Permit
     Other  licenses  and  permits in connection with ownership and operation of
       the  US  pipelines  between  Brownsville  and  US  border

Investment in Subsidiaries:
     Penn Octane de Mexico, S. de R.L. de C.V., consisting primarily of a permit
      to transport LPG from the Mexican Border to the Matamoros Terminal
      Facility

     Termatsal,  S.  de R.L. de C.V., consisting primarily of land, LPG terminal
       facilities,  Mexican  pipelines  and rights of way, and equipment used in
       the  transportation  of  LPG  from  the  Mexican  border to the Matamoros
       terminal  facility  and  various  LPG  terminal  equipment located in the
       vicinity  of  Saltillo,  Mexico.

     Penn Octane International LLC

Other
     Option to acquire Tergas, S.A. de C.V.


RELATIONSHIP OF PENN OCTANE AND RIO VISTA

     Rio  Vista  will  own  and  operate  the  liquefied  petroleum gas ("LPG"),
distribution, transportation and marketing business previously conducted by Penn
Octane  primarily  consisting of the terminal facilities and all other operating
assets  located  in  Brownsville,  Texas  and Matamoros, Mexico. Pursuant to the
Purchase  Contract  for  LPG,  Rio  Vista will purchase all of its LPG from Penn
Octane  for  sales  to  the  Mexican market to the extent Penn Octane is able to
supply  sufficient  quantities of LPG to meet Rio Vista's needs. Pursuant to the
Omnibus  Agreement, Penn Octane will furnish to Rio Vista general administration
and  support  services, including accounting, treasury, engineering, information
technology,  insurance,  administration  of  employee  benefit  and  incentive
compensation  plans.  Penn  Octane  owns  an  indirect ownership of a 2% general
partner  interest in Rio Vista held by Rio Vista's general partner, Rio Vista GP
LLC, a Delaware limited liability company that is currently wholly owned by Penn
Octane. However, Penn Octane's indirect 2% general partner interest in Rio Vista
is  expected  to be decreased to 1% as a result of the exercise by each of Shore
Capital  LLC,  designee  of  Richard  Shore,  Jr., President of Penn Octane, and
Jerome  B.  Richter,  Chief  Executive  Officer  of Penn Octane, of an option to
acquire  25%  of  the limited liability company interests of Rio Vista's general
partner  causing  Penn Octane's ownership in the general partner of Rio Vista to
be decreased from 100% to 50%. Mr. Shore and Mr. Richter are each members of the
board  of  directors of Penn Octane and the board of managers of Rio Vista. Penn
Octane  and  Rio  Vista  are  parties to the Distribution Agreement, the Omnibus
Agreement,  the  Purchase  Agreement  for  LPG,  the  Contribution,


                                        3

Conveyance  and  Assumption  Agreement and the Conveyance Agreement described in
the  Prior  Form  8-K.  Copies  of each of the foregoing agreements are filed as
exhibits  to  the  Form  10.

FURTHER INFORMATION

     Further  information  regarding  the  transactions and agreements described
above may be found in the Form 10 and the Prior Form 8-K.

ITEM 3.02.  UNREGISTERED SALES OF EQUITY SECURITIES

     On  September  30,  2004,  pursuant to the terms of an employment agreement
dated  as of May 13, 2003 with Richard Shore, Jr., President of Penn Octane, the
Company  issued  to  Shore Capital, LLC, the designee of Mr. Shore, a warrant to
purchase  763,737  shares  of Penn Octane's common stock at an exercise price of
$1.14  per  share.  The warrant is exercisable beginning on October 1, 2004, and
expires  on  July  10,  2006.  This  issuance was granted as compensation to Mr.
Shore  for  past  and future services and was exempt from registration under the
Securities  Act  of  1933  pursuant  to Section 4(2) thereof because neither the
issuance  nor  the  exercise  of  the  warrant  involves  any public offering of
securities.

ITEM 9.01.  FINANCIAL STATEMENTS AND EXHIBITS

     (b)  Pro Forma Financial Information


                                        4

                                   SIGNATURES

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

                                   PENN OCTANE CORPORATION


                                   By:   /s/ Ian T. Bothwell
                                      ----------------------
                                      Name:  Ian T. Bothwell
                                      Title:  Vice President, Treasurer,
                                         Assistant Secretary, Chief
                                         Financial Officer and Principal
                                         Accounting Officer

Date: October 6, 2004


                                        5

                    PENN OCTANE CORPORATION AND SUBSIDIARIES


        Unaudited Pro Forma Condensed Consolidated Financial Information

The  following  unaudited pro forma condensed consolidated financial information
for  Penn Octane give effects to the asset transfer and the resulting allocation
of sales, cost of goods sold and expenses, and to certain pro forma adjustments.
The  unaudited pro forma condensed consolidated statement of income for the year
ended  July  31,  2003  assumes that the above transaction was consummated as of
August 1, 2002.  The unaudited pro forma condensed consolidated balance sheet at
July  31,  2003  assumes  that the transaction was consummated on July 31, 2003.
The  unaudited pro forma condensed consolidated statement of income for the nine
months  ended  April 30, 2004 assumes that the above transaction was consummated
as  of  August  1, 2003.  The unaudited pro forma condensed consolidated balance
sheet  at  April  30, 2004 assumes that the transaction was consummated on April
30,  2004.  Because  Penn  Octane  has  control  of  Rio  Vista by virtue of its
ownership  and related voting control of the general partner, Rio Vista has been
consolidated  with  Penn  Octane  and the interests of the limited partners have
been  classified  as  minority  interests  in  the unaudited pro forma condensed
consolidated  financial  information.

Rio  Vista will be liable as guarantor for the Company's collateralized debt and
will  continue to pledge all of its assets as collateral.  Rio Vista may also be
prohibited  from  making  any distributions to unit holders if it would cause an
event  of  default,  or  if an event of default is existing, under the Company's
revolving  credit  facilities,  or  any other covenant which may exist under any
other credit arrangement or other regulatory requirement at the time.

The  Spin-Off  is a taxable transaction for federal income tax purposes (and may
also  be taxable under applicable state, local and foreign tax laws) to both the
Company  and  its  stockholders.  The Company intends to treat the Spin-Off as a
"partial  liquidation" for federal income tax purposes.  A "partial liquidation"
is  defined  under Section 302(e) of the Code as a distribution that (i) is "not
essentially  equivalent  to  a  dividend," as determined at the corporate level,
which  generally  requires  a  genuine  contraction  of  the  business  of  the
corporation,  (ii)  constitutes a redemption of stock and (iii) is made pursuant
to  a  plan of partial liquidation and within the taxable year in which the plan
is  adopted  or  within  the  succeeding  taxable  year.

The  Company  may  have  a  federal  income tax liability in connection with the
Spin-Off.  If  the  income  tax liability resulting from the Spin-Off is greater
than  $2,500,000,  Rio  Vista  has  agreed  to indemnify the Company for any tax
liability resulting from the transaction which is in excess of that amount.


                                      F-1



                                          PENN OCTANE CORPORATION AND SUBSIDIARIES
                                            PRO FORMA CONSOLIDATED BALANCE SHEET

                                                        JULY 31, 2003
                                                         (UNAUDITED)

                                                       AS REPORTED           PRO FORMA          PRO FORMA
                                                      JULY 31, 2003         ADJUSTMENTS       JULY 31, 2003
                                                   --------------------  ------------------  ---------------
                                                                                    
ASSETS:
Current Assets
  Cash                                             $            71,064   $         154,669 (1)  $   225,733
  Restricted cash                                            3,404,782                   -        3,404,782
  Trade accounts receivable, net                             4,143,458                   -        4,143,458
  Inventories                                                  878,082                   -          878,082
  Assets held for sale                                         720,000                   -          720,000
  Prepaid expenses and other current assets                    476,109                              476,109
                                                   --------------------  ------------------  ---------------
   Total Current Assets                                      9,693,495             154,669        9,848,164

  Investment in Subsidiary                                           -          15,466,943 (2)            -
                                                                                  (154,669)(1)
                                                                               (15,033,939)(3)
                                                                                  (216,502)(5)
                                                                                   (61,833)(6)
 Property Plant And Equipment - net                         17,677,830         (15,466,943)(2)   17,677,830
                                                                                15,466,943 (5)
 Lease rights (net of accumulated amortization of
   $707,535)                                                   446,504                   -          446,504
 Other non-current assets                                       19,913                   -           19,913
                                                   --------------------  ------------------  ---------------
    Total Assets                                   $        27,837,742   $         154,669   $   27,992,411
                                                   ====================  ==================  ===============



                                      F-2



                                       PENN OCTANE CORPORATION AND SUBSIDIARIES
                                    PRO FORMA CONSOLIDATED BALANCE SHEET-CONTINUED

                                                    JULY 31, 2003
                                                     (UNAUDITED)

                                                               AS REPORTED           PRO FORMA           PRO FORMA
                                                              JULY 31, 2003         ADJUSTMENTS        JULY 31, 2003
                                                            -----------------  ---------------------  ---------------
                                                                                             
LIABILITIES AND STOCKHOLDERS' EQUITY:
Current Liabilities
  Current maturities of long-term debt                      $        746,933   $                  -   $      746,933
  Short-term debt                                                  1,744,128                      -        1,744,128
  Revolving line of credit                                                 -                      -                -
  LPG trade accounts payable                                       7,152,098                      -        7,152,098
  Other accounts payable                                           2,470,880                      - (10)   2,470,880
  Foreign taxes payable                                               60,000                      -           60,000
  Accrued liabilities                                              1,083,966                      -        1,083,966
                                                            -----------------  ---------------------  ---------------
    Total Current Liabilities                                     13,258,005                      -       13,258,005
                                                            -----------------  ---------------------  ---------------
Long-term debt, less current maturities                               60,000                      -           60,000

Commitments and contingencies                                              -                      -                -

Minority interest in equity earnings of subsidiary                         -             15,250,441 (4)   15,250,441

Stockholders Equity:
   Common stock - $.01 par value, 25,000,000 shares
      Authorized; 15,274,749 shares issued and outstanding           152,747                      -          152,747

Additional paid-in-capital                                        28,298,301            (15,250,441)(4)   28,985,643
                                                                                         15,250,441 (5)
                                                                                            687,342 (6)
Notes receivable from an officer and another party for
   Exercise of warrants, net of reserves of $535,736              (2,897,520)                     -       (2,897,520)
Accumulated deficit                                              (11,033,791)              (749,175)(6)   26,816,905)
                                                                                        (15,033,939)(3)
                                                                                                  - (10)
                                                            -----------------  ---------------------  ---------------
    Total Stockholders' equity                                    14,519,737            (15,095,772)        (576,035)
                                                            -----------------  ---------------------  ---------------
      Total Liabilities and Stockholders' equity            $     27,837,742   $            154,669   $   27,992,411
                                                            =================  =====================  ===============



                                      F-3



                                        PENN OCTANE CORPORATION AND SUBSIDIARIES
                                     PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS

                                                YEAR ENDED JULY 31, 2003
                                                      (UNAUDITED)


                                                            AS REPORTED                                   PRO FORMA
                                                          AUGUST 1, 2002 -       PRO FORMA             AUGUST 1, 2002-
                                                           July 31, 2003        ADJUSTMENTS             July 31, 2003
                                                         ------------------  ------------------       -----------------
                                                                                          
Revenues                                                 $     162,489,565   $               -        $    162,489,565

Cost of goods sold                                             152,375,349                   -             152,375,349
                                                         ------------------  ------------------       -----------------

Gross Profit                                                    10,114,216                   -              10,114,216
                                                         ------------------  ------------------       -----------------
Selling, general and administrative expenses
  Legal and professional fees                                    2,597,065                   -               2,597,065
  Salaries and payroll related expenses                          2,411,843             749,175   (7)         3,161,018
  Other                                                          1,380,009                   -               1,380,009
                                                         ------------------  ------------------       -----------------
                                                                 6,388,917             749,175               7,138,092
                                                         ------------------  ------------------       -----------------

    Operating income (loss)                                      3,725,299            (749,175)              2,976,124
Other income (expense)
    Interest and LPG financing expense                          (1,757,664)                  -             ( 1,757,664)
    Interest income                                                 95,327                   -                  95,327
    Settlement of litigation                                    (  145,153)                  -             (   145,153)
    Minority interest in equity earnings of subsidiary                   -         ( 1,997,499)  (8)      (  1,997,499)
                                                         ------------------  ------------------       -----------------
         Income (loss) before taxes                              1,917,809         ( 2,746,674)              ( 828,865)

Provision (benefit) for income taxes                             (  40,000)                  -  (10)           (40,000)
                                                         ------------------  ------------------       -----------------

    Net income (loss)                                    $       1,957,809   $(      2,746,674)       $       (788,865)
                                                         ==================  ==================       =================


Net income (loss) per common share                       $            0.13                            $           (.05)
                                                         ==================                           =================

Net income (loss) per common share assuming dilution     $            0.13                            $           (.05)
                                                         ==================                           =================

Weighted average common shares outstanding                      15,035,220                                  15,035,220
                                                         ==================                           =================



                                      F-4

                     PENN OCTANE CORPORATION AND SUBSIDIARIES
              NOTES TO PRO FORMA CONSOLIDATED FINANCIAL INFORMATION

                            YEAR ENDED JULY 31, 2003

                                   (UNAUDITED)

The  following  unaudited pro forma condensed consolidated financial information
(Pro  Forma  Statements)  for Penn Octane give effect to the spin off of 100% of
the limited partner units of Rio Vista to the common stockholders of Penn Octane
(Spin-Off).  The Pro Forma Statements are based on the available information and
contain  certain  assumptions that Penn Octane deems appropriate.  The Pro Forma
Statements  do not purport to be indicative of the financial position or results
of  operations  of Penn Octane had the Spin-Off occurred on the dates indicated,
nor  are the Pro Forma Statements necessarily indicative of the future financial
position  or  results  of  operations  of Penn Octane.  The Pro Forma Statements
should  be  read  in  conjunction  with  the  consolidated balance sheet of Penn
Octane.

BALANCE SHEET:

The  unaudited  pro forma condensed consolidated balance sheets assume that such
transactions  were  consummated  on  July  31,  2003.

     (1)  To record the exercise of the options granted to Shore and Mr. Richter
          to  each acquire 25% of the limited liability company interests of the
          general  partner  of  Rio  Vista.
     (2)  To  reflect  the  transfer  of assets from Penn Octane to Rio Vista in
          exchange  for  limited  and  general  partnership  interests.
     (3)  To  record the Spin-Off of Penn Octane's limited partnership interests
          in  Rio  Vista  to  its  stockholders.
     (4)  To  reflect  minority  interest  in  the  equity  of  Rio  Vista.
     (5)  To  eliminate  intercompany  transactions  between Penn Octane and Rio
          Vista.
     (6)  Represents  the  estimated  intrinsic  value  associated  with the (i)
          options  granted to Shore and Mr. Richter to acquire a 50% interest in
          the  general partner and (ii) options granted to Shore to acquire a 5%
          limited  partnership  interest  in  Rio  Vista  and 5% interest in the
          common  Shore  of  Penn  Octane.
     (10) Taxable  income,  if any, resulting from the Spin-Off is assumed to be
          offset  at July 31, 2003 by existing net operating loss carryforwards.

INCOME STATEMENT:

The unaudited pro forma condensed consolidated statements of income for the year
ended  July  31,  2003  assume that the Spin-Off was consummated as of August 1,
2002.

     (7)  Represents  the  estimated  intrinsic  value  associated  with the (i)
          options  granted to Shore and Mr. Richter to acquire a 50% interest in
          the  general partner and (ii) options granted to Shore to acquire a 5%
          limited  partnership  interest  in  Rio  Vista  and 5% interest in the
          common  shares  of  Penn  Octane.
     (8)  To  record  minority  interest  in  earnings  of  Rio  Vista.
     (9)  Proforma  earnings  per  share  has been calculated based on pro forma
          weighted  average shares outstanding for the year ended July 31, 2003.
     (10) Taxable  income,  if any, resulting from the Spin-Off is assumed to be
          offset  at July 31, 2003 by existing net operating loss carryforwards.

     (11) Penn  Octane  anticipates  that it will incur additional direct costs,
          including  tax related services, public listing fees and transfer fees
          resulting  from  Rio  Vista  becoming  publicly  traded.


                                      F-5



                               PENN OCTANE CORPORATION AND SUBSIDIARIES
                                 PRO FORMA CONSOLIDATED BALANCE SHEET
                                            APRIL 30, 2004
                                              (UNAUDITED)


                                                   AS REPORTED      PRO FORMA             PRO FORMA
                                                 APRIL 30, 2004    ADJUSTMENTS         APRIL 30, 2004
                                                 ---------------  --------------       ---------------
                                                                           
ASSETS:
Current Assets
  Cash                                           $        17,570  $     150,440   (1)  $       168,010
    Restricted cash                                    4,726,845              -              4,726,845
  Trade accounts receivable, net                       6,853,054              -              6,853,054
       Inventories                                       828,798              -                828,798
    Assets held for sale                                       -              -                      -
      Prepaid expenses and other current assets          183,697                               183,697
                                                 ---------------  --------------       ---------------
    Total Current Assets                              12,609,964        150,440             12,760,404
    Investment in Subsidiary                                   -     15,044,014   (2)                -
                                                                      ( 150,440)  (1)
                                                                   ( 14,622,850)  (3)
                                                                      ( 210,582)  (5)
                                                                        (60,142)  (6)

 Property Plant And Equipment - net                   16,993,392   ( 15,044,014)  (2)       16,993,392
                                                                     15,044,014   (5)
 Lease rights - net                                      412,157              -                412,157
 Other non-current assets                                 18,130              -                 18,130
                                                 ---------------  --------------       ---------------
     Total Assets                                $    30,033,643  $     150,440        $    30,184,083
                                                 ===============  ==============       ===============



                                      F-6



                                         PENN OCTANE CORPORATION AND SUBSIDIARIES
                                      PRO FORMA CONSOLIDATED BALANCE SHEET-CONTINUED
                                                      APRIL 30, 2004
                                                        (UNAUDITED)


                                                                   AS REPORTED            PRO FORMA          PRO FORMA
                                                                 APRIL 30, 2004          ADJUSTMENTS       APRIL 30, 2004
                                                              ---------------------  -------------------  ----------------
                                                                                                 
LIABILITIES AND STOCKHOLDERS' EQUITY:
Current Liabilities
    Current maturities of long-term debt                      $            162,694   $                -   $       162,694
    Short-term debt                                                              -                    -                 -
    Revolving line of credit                                                     -                    -                 -
    LPG trade accounts payable                                           8,869,912                    -         8,869,912


    Other accounts payable                                               1,369,315                    -  (10)   1,369,315


    Foreign taxes payable                                                   43,914                    -            43,914
    Accrued liabilities                                                  1,062,197                    -         1,062,197
                                                              ---------------------  -------------------  ----------------
      Total Current Liabilities                                         11,508,032                    -        11,508,032
                                                              ---------------------  -------------------  ----------------
  Long-term debt, less current maturities                                1,706,220                    -         1,706,220

Commitments and contingencies                                                    -                    -                 -

  Minority interest in equity earnings of subsidiary                             -           14,833,432  (4)   14,833,432

  Stockholders' Equity:
     Common stock - $.01 par value, 25,000,000 shares
        authorized; 15,285,245 shares issued and outstanding               152,852                    -           152,852

  Additional paid-in-capital                                            28,460,971          (14,833,432) (4)   28,648,137
                                                                                             14,833,432  (5)
                                                                                                187,166  (6)

  Notes receivable from an officer and another party for
     exercise of warrants, net of reserves of $468,693                  (2,728,000)                   -        (2,728,000)
  Accumulated deficit                                                   (9,066,432)            (247,308) (6)  (23,936,590)
                                                                                            (14,622,850) (3)
                                                                                                       - (10)
                                                              ---------------------  -------------------  ----------------
      Total Stockholders' equity                                        16,819,391          (14,682,992)        2,136,399
                                                              ---------------------  -------------------  ----------------
        Total Liabilities and Stockholders' equity            $         30,033,643   $          150,440   $    30,184,083
                                                              =====================  ===================  ================



                                      F-7



                                        PENN OCTANE CORPORATION AND SUBSIDIARIES
                                     PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                                            NINE MONTHS ENDED APRIL 30, 2004

                                                       (UNAUDITED)


                                                            AS REPORTED                                    PROFORMA
                                                          AUGUST 1, 2003 -        PROFORMA              AUGUST 1, 2003-
                                                           APRIL 30, 2004       ADJUSTMENTS             APRIL 30, 2004
                                                         ------------------  ------------------        -----------------
                                                                                           
Revenues                                                 $     131,957,252   $               -         $    131,957,252

Cost of goods sold                                             124,378,138                   -              124,378,138
                                                         ------------------  ------------------        -----------------

Gross Profit                                                     7,579,114                   -                7,579,114
                                                         ------------------  ------------------        -----------------

Selling, general and administrative expenses
  Legal and professional fees                                    1,542,254                   -                1,542,254
  Salaries and payroll related expenses                          1,747,941             925,786    (7)         2,673,727
  Other                                                            992,756                   -                  992,756
                                                         ------------------  ------------------        -----------------
                                                                 4,282,951             925,786                5,208,737

Reduction of value on asset held for sale                        ( 500,000)                  -                ( 500,000)
                                                         ------------------  ------------------        -----------------

    Operating income (loss)                                      2,796,163            (925,786)               1,870,377

Other income (expense)
    Interest and LPG financing expense                          (1,047,380)                  -               (1,047,380)
    Interest income                                                 54,992                   -                   54,992
    Other income                                                   210,000                   -                  210,000
    Minority interest in equity earnings of subsidiary                   -         ( 1,819,775)   (8)        (1,819,775)
                                                         ------------------  ------------------        -----------------
         Income (loss) before taxes                              2,013,775         ( 2,745,561)               ( 731,786)

Provision (benefit) for income taxes                                46,414                   -   (10)            46,414
                                                         ------------------  ------------------        -----------------

    Net income (loss)                                    $       1,967,361   $(      2,745,561)        $       (778,200)
                                                         ==================  ==================        =================


Net income (loss) per common share
                                                         $            0.13                             $          ( .05)
                                                         ==================                            =================

Net income (loss) per common share assuming dilution
                                                         $            0.13                             $          ( .05)
                                                         ==================                            =================

Weighted average common shares outstanding
                                                                15,312,301                                   15,312,301
                                                         ==================                            =================



                                      F-8

                    PENN OCTANE CORPORATION AND SUBSIDIARIES
              NOTES TO PRO FORMA CONSOLIDATED FINANCIAL INFORMATION

                        NINE MONTHS ENDED APRIL 30, 2004

                                   (UNAUDITED)

The  following  unaudited pro forma condensed consolidated financial information
(Pro  Forma  Statements)  for Penn Octane give effect to the spin off of 100% of
the limited partner units of Rio Vista to the common stockholders of Penn Octane
(Spin-Off).  The Pro Forma Statements are based on the available information and
contain  certain  assumptions that Penn Octane deems appropriate.  The Pro Forma
Statements  do not purport to be indicative of the financial position or results
of  operations  of Penn Octane had the Spin-Off occurred on the dates indicated,
nor  are the Pro Forma Statements necessarily indicative of the future financial
position  or  results  of  operations  of Penn Octane.  The Pro Forma Statements
should  be  read  in  conjunction  with  the  consolidated balance sheet of Penn
Octane.

BALANCE  SHEET:

The  unaudited  pro forma condensed consolidated balance sheets assume that such
transactions  were  consummated  on  April  30,  2004.

     (1)  To record the exercise of the options granted to Shore and Mr. Richter
          to  each acquire 25% of the limited liability company interests of the
          general  partner  of  Rio  Vista.
     (2)  To  reflect  the  transfer  of assets from Penn Octane to Rio Vista in
          exchange  for  limited  and  general  partnership  interests.
     (3)  To  record the Spin-Off of Penn Octane's limited partnership interests
          in  Rio  Vista  to  its  stockholders.
     (4)  To  reflect  minority  interest  in  the  equity  of  Rio  Vista.
     (5)  To  eliminate  intercompany  transactions  between Penn Octane and Rio
          Vista.
     (6)  Represents  the  estimated  intrinsic  value  associated  with the (i)
          options  granted to Shore and Mr. Richter to acquire a 50% interest in
          the  general partner and (ii) options granted to Shore to acquire a 5%
          limited  partnership  interest  in  Rio  Vista  and 5% interest in the
          common  shares  of  Penn  Octane.
     (10) Taxable  income,  if any, resulting from the Spin-Off is assumed to be
          offset at April 30, 2004 by existing net operating loss carryforwards.

INCOME STATEMENT:

The unaudited pro forma condensed consolidated statements of income for the nine
months  ended  April  30,  2004  assume  that the Spin-Off was consummated as of
August  1,  2003.

     (7)  Represents  the  estimated  intrinsic  value  associated  with the (i)
          options  granted to Shore and Mr. Richter to acquire a 50% interest in
          the  general partner and (ii) options granted to shore to acquire a 5%
          limited  partnership  interest  in  Rio  Vista  and 5% interest in the
          common  shares  of  Penn  Octane.
     (8)  To  record  minority  interest  in  earnings  of  Rio  Vista.
     (9)  Proforma  earnings  per  share  has been calculated based on pro forma
          weighted  average  shares  outstanding for the nine months ended April
          30,  2004
     (10) Taxable  income,  if any, resulting from the Spin-Off is assumed to be
          offset at April 30, 2004 by existing net operating loss carryforwards.

     (11) Penn  Octane  anticipates  that it will incur additional direct costs,
          including  tax related services, public listing fees and transfer fees
          resulting  from  Rio  Vista  becoming  publicly  traded.


                                      F-9