EXHIBIT 99.1

                                  Press Release

  Penn Octane Corporation Announces Appointment Of New Chief Executive Officer

                  Company Implements Steps To Improve Cash Flow


PALM  DESERT,  CA  -  JUNE  28, 2005.  Penn Octane Corporation (NASDAQ: POCC), a
supplier  of  LPG  for  distribution  to  Northeast Mexico, announced today that
Charles C. Handly was appointed as President and Chief Executive Officer of Penn
Octane  effective  June  23,  2005.  Mr.  Handly replaces Richard Shore, Jr. who
resigned  from all positions with Penn Octane on June 22, 2005.  Mr. Handly, has
served as an executive officer of Penn Octane since August 2002.  Before joining
Penn  Octane,  Mr.  Handly  worked  at  Exxon  Corporation  (now  Exxon  Mobil
Corporation)  for  38  years.  Based  on his extensive experience, Mr. Handly is
expected  to  provide  the  requisite  leadership for Penn Octane as it seeks to
implement  steps  to  improve  cash  flows. These steps may include reduction of
operating  costs,  restructuring  of certain obligations, and raising additional
debt  and/or  equity capital. Under Mr. Handly's leadership, Penn Octane is also
actively  pursuing discussions regarding a possible sale of all or a portion its
LPG  assets.

In  its  Form  8-K  filed with the Securities and Exchange Commission on June 9,
2005,  Penn  Octane  described its expected operating cash shortfalls during the
summer  months  of  2005  in  connection  with  the  new  agreement  between its
affiliate,  Rio  Vista  Energy  Partners  L.P.  ("Rio Vista") and P.M.I. Trading
Limited ("PMI") for sales of liquefied petroleum gas ("LPG") for the period June
4,  2005  through  March  31,  2006.  This  agreement  provides the Company with
greater  certainty  regarding future volume commitments than during the previous
14  months  when the Company was operating on month to month arrangements (other
than  the  period  January  2005 through March 2005 when there was a three month
arrangement).  Any  additional  volumes  of  LPG  purchased  by PMI over minimum
contract  volumes  described in the Form 8-K would generate additional cash flow
to  Penn  Octane.  In addition, the volume commitments during the winter periods
are  expected  to  provide  Penn  Octane  with  positive  operating  cash  flow.


About  Penn  Octane  Corporation

Penn  Octane historically has been a leading supplier of Liquefied Petroleum Gas
(LPG) to Northeastern Mexico until the recent transfer of its physical assets to
Rio  Vista  Energy  Partners  L.P. (Rio Vista). Penn Octane continues to lease a
132-mile,  six-inch  pipeline which connects from a gas plant in Kleberg County,
Texas,  to its terminal facility in Brownsville, Texas. The Brownsville terminal
facility  was  recently transferred to Rio Vista. Penn Octane supplies Rio Vista
with all of the LPG which Rio Vista supplies to Northeastern Mexico. Penn Octane
also  utilizes  a 12-inch propane pipeline which connects certain refineries and
other  supply  sources  in  Corpus  Christi,  Texas, to the gas plant in Kleberg
County. Penn Octane's network is further enhanced by 155 miles of pipeline owned
by  Seadrift  Pipeline Corporation that Penn Octane has the ability to access to
transport LPG to and from Markham, Texas, that enhances Penn Octane's ability to
deliver LPG to Rio Vista for potential further



distribution  to  Northeastern Mexico. Penn Octane has recently begun operations
of  its  gasoline  and  diesel fuel reseller business. By allocating portions of
certain  pipeline  and terminal space located in California, Arizona, Nevada and
Texas  to  Penn  Octane, Penn Octane is able to sell gasoline and diesel fuel at
rack  loading  terminals  and  through  bulk  and  transactional  exchanges.

Forward-Looking  Statements

Certain  of  the statements in this news release are forward-looking statements,
including  statements  regarding  efforts to improve of cash flows, reduction of
operating  costs,  restructuring of certain obligations, raising additional debt
and/or  equity  capital,  exploring  alternatives  regarding  a possible sale of
assets,  future LPG volumes, and prospects for the LPG business and the gasoline
and  diesel  fuel  reseller  business.  Although  these  statements reflect Penn
Octane's  beliefs,  they are subject to uncertainties and risks that could cause
actual results to differ materially from expectations. These risks include lower
than  expected  demand  and  reduced  margins for Penn Octane's products and the
ability  of  Penn  Octane  to  continue  to  receive  allocation of pipeline and
terminal space. There is no assurance that Penn Octane's cost reduction measures
will be adequate or that a sale of assets can be completed on terms satisfactory
to  Penn  Octane,  if at all.  In addition, there is a risk that Penn Octane may
not  be  able  to  obtain  adequate  financing  to  finance  the purchase of its
products. If Penn Octane is not able to obtain adequate financing or to continue
to generate sales of its products at profitable levels, Penn Octane would suffer
material  adverse consequences to its LPG and/or Fuel Sales business which would
adversely  impact  Penn  Octane's financial condition and results of operations.
Additional  information  regarding risks affecting Penn Octane's business may be
found  in Penn Octane's most recent reports on Form 8-K, Form 10-Q and Form 10-K
and  Rio  Vista's Form 10-Q, Form 10-K and Form 10 filed with the Securities and
Exchange  Commission.

________________________________________
Contact:
     Penn  Octane  Corporation
     Charles  C.  Handly  /  Ian  T.  Bothwell,  760-772-9080
     or
     CEOcast,  Inc.  for  Penn  Octane  Corporation
     Ed  Lewis,  212-732-4300