PROMISSORY  NOTE



PROMISSORY  NOTE  (the  "Note")  of  the Borrower named below delivered to RZB
Finance  LLC  ("RZB")  dated  October  14,  1997.

1.          SPECIAL  TERMS

     The  following terms and provisions shall apply to this Note; definitions
of  terms  in  this  or  other sections of this Note expressed in the singular
shall  include  the  plural  and  vice  versa.

     Borrower:    Penn  Octane  Corporation

     a  Delaware  Corporation
     (jurisdiction  of  incorporation)

     Principal  Amount  of  this  Note:

     Six  Million  Dollars

     ($6,000,000)

     Margin:    1%  p.a.

     Loan Documents:  Line Letter dated October 14, 1997, between the Borrower
and  RZB,  General  Security  Agreement  dated  October  14, 1997, between the
Borrower and RZB, Continuing Agreement for Letters of Credit dated October 14,
1997,  between  the Borrower and RZB, Guaranty and Agreement dated October 14,
1997  between  Jerome  Richter  (the  "Guarantor")  and  RZB,  and  all  other
agreements from time to time executed by the Borrower or the Guarantor for the
benefit of RZB, in each case as amended, modified or supplemented from time to
time.

     Minimum  Repayment  Amount:  $100,000


2.          PRINCIPAL  AND  INTEREST

     FOR  VALUE RECEIVED, the Borrower promises to pay to the order of RZB, ON
DEMAND,  the Principal Amount of this Note specified in Section 1 or, if less,
the  then-outstanding  principal  amount  of  all  loans  (each  a  "Loan" and
collectively,  the  "Loans")  made to the Borrower by RZB pursuant to the Loan
Documents.    In  no event shall the maturity date of any Loan be more than 30
days  after  the  date  such  Loan  is  made.

     The Borrower promises also to pay interest on the unpaid principal amount
of  each  Loan  (after as well as before judgment) from the date thereof until
maturity (whether on demand, by acceleration or otherwise) at a rate per annum
equal  to  the  Margin  specified in Section 1 plus the Base Lending Rate from
time  to  time in effect, such interest to be payable on the last Business Day
of  each  calendar  month  and  at  such  maturity.

     Notwithstanding  the  preceding  sentence,  the  Borrower  shall also pay
interest at a rate per annum equal to 2% plus the Margin plus the Base Lending
Rate  from  time  to  time in effect, on any principal of the Loan and, to the
extent  permitted  by  law,  on  any  interest  or other amount payable by the
Borrower  hereunder  which  shall  not  be  paid  in full when due (whether on
demand,  by  acceleration  or otherwise) from such due date until paid in full
(after  as  well  as  before judgment), such interest to be payable on demand.

     All  interest  shall  be  computed  on  the  basis  of the number of days
actually  elapsed  in  a  360-day  year.

     Definitions

     The  term  "Business Day" means any day other than a Saturday, Sunday, or
any  day  which  shall  be  in New York City a legal holiday or a day on which
banking  institutions  are  authorized  by  law  to  close.

     The  term  "Base  Lending Rate" means, for any day, the higher of (i) the
rate  announced  by The Chase Manhattan Bank (the "Bank") from time to time at
its  principal  office  in  New  York, New York as its prime rate for domestic
(United  States)  commercial  loans in effect on such day and (ii) the Federal
Funds  Rate  in  effect on such day plus 1/2%.  (Such Base Lending Rate is not
necessarily  intended to be the lowest rate of interest charged by the Bank in
connection  with  extensions of credit.)  Each change in the Base Lending Rate
shall  result  in  a corresponding change in the interest rate and such change
shall  be  effective  on the effective date of such change in the Base Lending
Rate.

     The  term  "Federal Funds Rate" means, for any day, the overnight federal
funds rate in New York City, as published for such day (or, if such day is not
a  Business  Day,  for the next preceding Business Day) in the Federal Reserve
Statistical  Release  H.15 (519) or any successor publication, or if such rate
is  not  so  published for any day which is a Business Day, the average of the
quotations  for  such  day on overnight federal funds transactions in New York
City  received  by  the  Bank  from  three federal funds brokers of recognized
standing  selected  by  the  Bank.

3.          ALL  PAYMENTS

     Each payment by the Borrower pursuant to this Note shall be made prior to
1:00 P.M. (New York time) on the date due and shall be made without set-off or
counterclaim  to RZB at such account as RZB shall designate, or in the absence
of such designation, to RZB at its office, presently located at 1133 Avenue of
the  Americas,  New York, NY 10036, or as RZB may otherwise direct and in such
amounts as may be necessary in order that all such payments (after withholding
for  or  on account of any present or future taxes, levies, imposts, duties or
other  similar  charges  of whatsoever nature imposed by any government or any
political  subdivision  or  taxing authority thereof, other than any tax on or
measured  by  the  net  income  of  RZB pursuant to the income tax laws of the
jurisdiction  where RZB's principal or lending office is located) shall not be
less  than  the  amounts otherwise specified to be paid under this Note.  Each
such  payment shall be made in lawful currency of the United States of America
and  in  immediately  available  funds.  If the stated due date of any payment
required hereunder is other than a Business Day, such payment shall be made on
the  next  succeeding  Business  Day and interest at the applicable rate shall
accrue  thereon  during  such  extension.

     The  Borrower  will  have the right to repay all or any portion of a Loan
prior  to  demand  only if RZB has been notified prior to 10:00 a.m. (New York
time)  on the day of any repayment, provided that each partial repayment shall
not  be  less  than  the Minimum Repayment Amount.  All repayments pursuant to
this  paragraph shall be accompanied by the payment of all accrued interest on
the  principal  amount  so  paid.

4.          REPRESENTATIONS  AND  WARRANTIES

     The  Borrower  represents and warrants that all acts, filings, conditions
and  things required to be done and performed and to have happened (including,
without  limitation,  the  obtaining  of  necessary  governmental  approvals)
precedent  to  the  issuance  of  this  Note  to constitute this Note the duly
authorized,  legal,  valid and binding obligation of the Borrower, enforceable
in  accordance  with its terms, have been done, performed and have happened in
due  and  strict  compliance  with  all  applicable  laws.

5.          DEFAULT

     Without  limiting  the  right  of  RZB  to  demand  payment  of the Loans
evidenced  hereby  at any time in its sole discretion, if any of the following
events  shall  occur:    default in payment of any amount due hereunder to the
holder  hereof,  whether  on demand or otherwise; suspension or liquidation by
the  Borrower of its usual business or suspension or expulsion of the Borrower
from  any  exchange;  calling  of  a  meeting  of creditors; assignment by the
Borrower  for  the  benefit  of  creditors;  dissolution,  bulk sale or notice
thereof  effected or given by the Borrower; creation of a security interest in
any  assets  of the Borrower which are or shall be subject to liens granted to
the  holder  hereof  by  the  Borrower  without  consent of the holder hereof;
insolvency  of  any kind, attachment, distraint, garnishment, levy, execution,
judgment, application for or appointment of a receiver or custodian, filing of
a voluntary or involuntary petition under any provision of the U.S. Bankruptcy
Code  or amendments thereto, of, by or against the Borrower or any property or
rights  of the Borrower; filing of a petition or institution of any proceeding
by  or  against the Borrower for any relief under any bankruptcy or insolvency
laws  or  any  laws  relating  to  the  relief  of  debtors,  readjustment  of
indebtedness,  reorganizations,  compositions  or extensions; any governmental
authority  or  any  court  at the instance of any governmental authority shall
take  possession  of  any  substantial part of the property of the Borrower or
shall  assume  control  over  the  affairs  or operations of the Borrower; any
statement,  representation  or  warranty made by the Borrower in any document,
agreement  or  financial statement delivered to RZB shall prove to be false in
any  material  respect  when  made; failure of the Borrower or any other party
thereto  to  comply with any term of any of the Loan Documents; failure of the
Borrower,  on  request,  to  furnish  to  RZB any financial information, or to
permit  inspection by RZB of any books or records; any change in, or discovery
with  regard  to,  the  condition  or  affairs of the Borrower which, in RZB's
opinion,  increases  its  credit  risk;  or  if RZB for any other reason deems
itself  insecure;  then,  the  indebtedness  evidenced  by  this Note, and all
accrued interest thereon shall become absolute, due and payable without demand
or  notice  to the Borrower.  Upon default in the due payment of this Note, or
whenever  the  same  or  any installment of principal or interest hereof shall
become  due in accordance with any of the provisions hereof (whether on demand
or  otherwise),  RZB may, but shall not be required to, exercise any or all of
its  rights and remedies, whether existing by contract, law or otherwise, with
respect  to  any  collateral security delivered in respect of the indebtedness
evidenced  hereby.

6.          MISCELLANEOUS

     This  Note is delivered pursuant to, and entitled to the benefits of, the
Loan  Documents.

     The Loans and principal repayments thereof may be recorded on the records
of RZB and, prior to any transfer of, or any action to collect, this Note, the
outstanding  principal  amount  of  each  Loan shall be endorsed on this Note,
together  with  the  date  of  such  endorsement.    Any  such  recordation or
endorsement  shall  constitute  prima  facie  evidence  of the accuracy of the
information  so  recorded  or endorsed (provided, however, that the failure of
RZB  to  record  any  of the foregoing shall not limit or otherwise affect the
obligation of the Borrower to repay all the Loans (including interest thereon)
and  its  other obligations hereunder and under the Loan Documents).  The Bank
may charge any account of the Borrower with the Bank for amounts payable under
this  Note.

     Each  payment of principal of, or interest on, the Loans shall constitute
an acknowledgment of the indebtedness of the Borrower under the Loan Documents
and  this  Note.    The  Borrower:

     a.       waives presentment, demand, protest and other notice of any kind
in  connection  with  this  Note,  and

     b.          agrees  to pay to the holder hereof, on demand, all costs and
expenses  (including  reasonable  legal  fees) incurred in connection with the
enforcement  and  collection  of  this  Note.

     THIS  NOTE  SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW
OF  THE  STATE OF NEW YORK (WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW),
BUT  THIS  SHALL  NOT  LIMIT  THE RATE OF INTEREST WHICH MAY BE CHARGED BY RZB
UNDER  OTHER  APPLICABLE  LAW.

     The  Borrower  hereby  agrees that ANY LEGAL ACTION OR PROCEEDING AGAINST
THE  BORROWER  WITH  RESPECT  TO THIS NOTE MAY BE BROUGHT IN THE COURTS OF THE
STATE  OF  NEW YORK IN THE CITY OF NEW YORK OR OF THE UNITED STATES OF AMERICA
FOR  THE SOUTHERN DISTRICT OF NEW YORK as RZB may elect, and, by execution and
delivery  hereof,  the  Borrower  accepts  and  consents to, for itself and in
respect  to  its  property, generally and unconditionally, the jurisdiction of
the  aforesaid  courts  and  agrees that such jurisdiction shall be exclusive,
unless  waived  by  RZB  in  writing, with respect to any action or proceeding
brought by it against RZB and any questions relating to usury.  Nothing herein
shall  limit the right of RZB to bring proceedings against the Borrower in the
courts  of  any other jurisdiction.  Service of process out of any such courts
may be made by mailing copies thereof by registered or certified mail, postage
prepaid,  to  the  Borrower at its address for notices as specified herein and
will  become  effective  30 days after such mailing.  The Borrower agrees that
Sections  5-1401 and 5-1402 of the General Obligations Law of the State of New
York  shall  apply  to  this Note and, to the maximum extent permitted by law,
waives any right to stay or to dismiss any action or proceeding brought before
said  courts  on  the  basis  of  forum  non  conveniens.

     AFTER  REVIEWING THIS PROVISION SPECIFICALLY WITH ITS RESPECTIVE COUNSEL,
EACH  OF  THE BORROWER AND RZB HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY
WAIVES  ANY  AND  ALL  RIGHTS IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY
LITIGATION  BASED  ON,  OR  ARISING OUT OF, UNDER, OR IN CONNECTION WITH, THIS
NOTE  OR  ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER VERBAL
OR  WRITTEN), OR ACTIONS OF THE BORROWER OR RZB.  THIS PROVISION IS A MATERIAL
INDUCEMENT  FOR  RZB  MAKING  THE  LOANS  TO  THE  BORROWER.

     Nothing  contained  in  this Note shall be deemed to establish or require
the  payment  of a rate of interest in excess of the maximum rate permitted by
applicable  law  (the  "Maximum Rate").  If the amount of interest payable for
any  interest payment period ending on any interest payment date calculated in
accordance  with  the  provisions  of  this Note (said amount, the "Calculated
Interest")  exceeds  the  amount  of  interest  that would be payable for such
interest  payment  period  had  interest for such interest payment period been
calculated  at  the Maximum Rate, there shall be paid on such interest payment
date  an  amount  of  interest calculated on the basis of the Maximum Rate for
such interest payment period.  If on any subsequent interest payment date, (i)
the  Calculated  Interest  for  the  interest  payment  period  ending on such
subsequent  interest payment date (the "Current Interest Period") is less than
the  amount of interest that would be payable for such Current Interest Period
had  interest for such Current Interest Period been calculated on the basis of
the  Maximum  Rate  and  (ii) any portion of the excess (if any) of Calculated
Interest for any prior interest payment period over interest calculated at the
Maximum Rate for such prior interest payment period (the "Outstanding Interest
Amount")  remains  unpaid, then on such subsequent interest payment date there
shall  be  paid,  as  provided  herein,  additional  interest for such Current
Interest Period in an amount equal to the lesser of (i) the theretofore unpaid
Outstanding Interest Amounts for all prior interest payment periods or (ii) an
amount  that,  when  added  to  the  amount  of  Calculated  Interest
payable  for  such Current Interest Period, results in the payment of interest
for  such  Current  Interest  Period  at  the  Maximum  Rate.

     IN  WITNESS  WHEREOF,  the  undersigned  has  caused this Note to be duly
executed  and  delivered  by  its  duly  authorized  officer(s).



PENN  OCTANE  CORPORATION.


By:  /s/  Jerome B. Richter
     ----------------------
  Name:   Jerome B. Richter
  Title:  President

Address  of  Borrower  for  Notices:

900  Veterans  Blvd,  Suite  240
Redwood  City,  CA  94063