Control #:



           NEITHER  THIS  PROMISSORY  NOTE  NOR  ANY  OF  THE  RIGHTS  OR
           OBLIGATIONS  EVIDENCED  HEREBY   HAVE   BEEN   REGISTERED   OR
           QUALIFIED  UNDER  THE SECURITIES ACT OF 1933, AS AMENDED  (THE
           "ACT"),  OR  THE SECURITIES LAWS  OF  ANY  STATE  (THE  "STATE
           LAWS").   NEITHER  THIS  PROMISSORY   NOTE  NOR  ANY  OF   THE
           RIGHTS OR OBLIGATIONS EVIDENCED HEREBY  MAY BE SOLD, ASSIGNED,
           TRANSFERRED,  ENCUMBERED  OR  OTHERWISE DISPOSED OF, IN  WHOLE
           OR  IN   PART,  IN  THE   ABSENCE  OF  SUCH  REGISTRATION  AND
           QUALIFICATION   OR   THE   AVAILABILITY   OF   AN   APPLICABLE
           EXEMPTION    FROM    THE    REGISTRATION   AND   QUALIFICATION
           REQUIREMENTS  OF  SUCH  ACT  AND  STATE  LAWS  EVIDENCED BY AN
           OPINION  OF  LEGAL  COUNSEL,  WHICH  OPINION AND LEGAL COUNSEL
           ARE SATISFACTORY TO THE BORROWER.




                            SERIES B PROMISSORY NOTE
                            ------------------------

                             Palm Desert, California

1.     General
       -------

     FOR  VALUE  RECEIVED,  PENN OCTANE CORPORATION, a Delaware corporation (the
"Borrower"),  promises  to pay to, a __________________________  (the "Holder"),
at the Holder's address set forth in Section 14 of the Purchase Agreement, dated
as of even date herewith (the "Agreement"), between the Borrower and the Holder,
pursuant  to  which  this  Promissory  Note (the "Series B Note") is first being
issued,  or at such other address as the Holder may designate to the Borrower in
writing  for such purpose pursuant to Section 14 of the Agreement at least three
Business  Days  (hereinafter  defined) prior to the date fixed for such payment,
the  entire principal sum of ($), together with interest thereon, on the earlier
of (i) December 15, 2001, (ii) a date determined by the Borrower within ten (10)
Business Days after the closing of any Financing (as defined in Clause (i)(a) of
Recital  A  to and Section 10 of the Agreement) in which the net proceeds to the
Borrower  equal  or  exceed  the  aggregate (the "Aggregate Amount") of the then
unpaid principal of and the then accrued and unpaid interest on the (A) Series B
Notes  (as  defined  in  the Agreement) held by the Investors (as defined in the
Agreement), (B) Series A Notes (as defined in the Agreement), and (C) Additional
Debt  (as  defined  in  the  Agreement),  or (iii) the occurrence of an Event of
Default (hereinafter defined) (collectively, the "Maturity Date"), at which time
all  principal  and  any  accrued  and  unpaid interest thereon shall be due and
owing.


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     In the event of the closing of a Financing in which the net proceeds to the
Company do not equal or exceed the Aggregate Amount, on a date determined by the
Borrower  within  ten  (10) Business Days after such closing, the Borrower shall
apply  such  net  proceeds  to  prepay the then unpaid principal of and the then
accrued  and  unpaid  interest  on the (i) Series B Notes held by the Investors,
(ii)  Series A Notes, and (iii) Additional Debt, pro rata in accordance with the
respective  then  unpaid  principal  amounts  owed  to  each.

     This Series B Note shall accrue  interest on unpaid principal from the date
hereof  at the rate of thirteen and one-half  percent (13.5%) per annum, subject
to  adjustment as set forth herein and payable on March 31, 2001, June 15, 2001,
September  15,  2001  and  December 15, 2001 (or the Maturity Date, if earlier).
Payment  of  this  Note  may  be enforced by suit or other process of law.  This
Series  B  Note may be prepaid in whole or in part at any time prior to maturity
without  premium  or  penalty.

     All  payments  hereunder  shall  be  payable  in lawful money of the United
States  and  shall be applied first against accrued and unpaid interest and then
against  unpaid  principal.  Any payments hereunder which otherwise would be due
on  a  day  which  is  not  a  Business  Day  shall  instead be made on the next
succeeding day which is a Business Day.  For purposes of this Series B Note, the
term  "Business Day" shall mean any day other than a Saturday, a Sunday or a day
on  which  banking  institutions  in  New  York,  New  York,  or in Palm Desert,
California,  are  authorized  by  law  or  regulation  to  close.

     If the entire security interest referenced  in  Section  2.3  hereof is not
perfected  with the priority described in Schedule I attached on or before March
15, 2001, the interest rate hereunder shall be increased by 3% per annum for the
period from and including March 15, 2001 to and including the date on which such
security  interest  is so perfected.  For purposes of this Section 1, a security
interest  will be deemed perfected when either (a) PMG Capital Corp. ("PMG"), as
collateral agent, acting reasonably, is satisfied in its discretion and based on
the advice of its counsel that such security interest has been validly perfected
in accordance with all applicable laws with the priority specified in Schedule I
attached  hereto,  or  (b) the  Borrower delivers to PMG, as collateral agent, a
legal  opinion, in form and substance satisfactory to PMG and upon which PMG and
each  holder of any Secured Obligations (as defined in Section 2.3 hereof) shall
be  permitted  to rely, that the security interest has been validly perfected in
accordance  with  all  applicable laws with the priority specified in Schedule I
attached  hereto.

     If  the  registration statement (the "Registration Statement") contemplated
by  Section  3(a)  of  the  Registration  Rights  Agreement  (as  defined in the
Agreement)  is  not declared effective by the Securities and Exchange Commission
(the  "SEC")  by  March 31, 2001 or, if the Borrower is not then eligible to use
Form  S-3  for  purposes of such Registration Statement, by April 30, 2001 (such
date  being  hereinafter  referred to as the "Required Registration Date"), then
the  interest  rate  hereunder shall be increased by 4% per annum for the period
from  and  including  the  Required  Registration Date to and including the date
immediately  preceding  the date on which the Registration Statement is declared
effective  by the SEC. The interest rate hereunder shall also be increased by 4%
per  annum  if the Registration Statement, having been declared effective by the
SEC,  does  not  remain effective during any period during which the Borrower is
required  to use its reasonable best efforts to keep such Registration Statement
effective  pursuant  to  the  Registration  Rights Agreement, with such increase


                                 Page 92 of 106

being applicable from and including any date on which the Registration Statement
is  no  longer  effective  and  the Borrower is obligated under the Registration
Rights  Agreement to use its reasonable best efforts to keep it effective to and
including  the  earlier  of  the  date  on  which  the Registration Statement is
restored  to  effective status or the date on which the Borrower's obligation to
use  its  reasonable  best  efforts to keep the Registration Statement effective
expires  or  is  suspended.

     2.     Remedies
            --------

     2.1     Events  of  Default  Defined.  The  Borrower  shall  be  in default
             -----------------------------
hereunder upon the occurrence of any of the following events of default ("Events
of  Default"):  (i)  the  failure  by  the Borrower to make any payment when due
hereunder  and  such  failure shall have continued for a period of five (5) days
after  delivery  by the Holder to the Borrower of written notice of such failure
pursuant  to  Section 14 of the Agreement; (ii) the commencement by the Borrower
of  a  voluntary case in a bankruptcy or insolvency proceeding or the entry of a
decree or order by a court of competent jurisdiction adjudicating the Borrower a
bankrupt  (or  the appointment of a receiver or trustee of the Borrower upon the
application  of  any creditor in an insolvency or bankruptcy proceeding or other
creditor's  suit,  which  appointment  is  not terminated within sixty (60) days
after  the  date  of  such  appointment);  (iii)  the  filing  of a petition for
reorganization,  liquidation  or  arrangement  against  the  Borrower  under the
Federal  bankruptcy  laws and such petition shall not have been dismissed within
sixty  (60) days after it was filed; (iv) the making of a general assignment for
the  benefit  of  its creditors by the Borrower; (v) the existence of any final,
non-appealable  judgment  on  any of the Series B Notes held by the Investors on
account  of  the  nonpayment  thereof  by  the  Borrower; (vi) the breach of any
material  representation,  warranty  or covenant (other than as described in the
preceding  clauses  (i)  through  (v)) of the Borrower in the security agreement
contemplated  by  Section  2.3  below  if the Borrower fails to cure such breach
within a period of fifteen (15) days following the delivery by the Holder to the
Borrower  of  written  notice  of  such  breach  pursuant  to  Section 14 of the
Agreement;  or  (vii)  the  breach  of  any material representation, warranty or
covenant  of  the  Guarantor  (as hereinafter defined) in the Guaranty or Pledge
Agreement  (as  such  terms are hereinafter defined) contemplated by Section 2.3
below if the Guarantor fails to cure such breach within a period of fifteen (15)
days  following the delivery by the Holder to the Guarantor of written notice of
such  breach  pursuant  to  Section  13  of  the  Pledge  Agreement.

     2.2     Enforcement  Costs.  If  any payment owing under this Series B Note
             -------------------
is  not  paid when due, whether at maturity or by acceleration or otherwise, the
Borrower  agrees  to pay all reasonable costs of collection and such costs shall
include, without limitation, all reasonable  costs, attorneys' fees and expenses
incurred  by  the  Holder  in  connection  with  any  insolvency,  bankruptcy,
reorganization, arrangement or similar proceedings involving the Borrower, which
in  any  way  affects  the  exercise  by  the  Holder of the Holder's rights and
remedies  under  this  Series  B  Note.


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     2.3     Security.
             --------

          a.     The payment obligations of the Borrower hereunder and under the
Series B Notes held by the Investors, the Series A Notes and the Additional Debt
(collectively,  the  "Secured  Obligations")  are  secured  by  a Guaranty dated
January ___, 2001 (the "Guaranty") of Jerome B. Richter (the "Guarantor"), which
Guaranty  is with recourse only to certain shares of the Borrower's Common Stock
owned  by  the Guarantor and pledged to secure the Guarantor's obligations under
the  Guaranty  pursuant  to  the terms and provisions of a Pledge Agreement (the
"Pledge  Agreement") dated as of January ___, 2001 between the Guarantor and PMG
as  collateral  agent  for  the holders of the Secured Obligations (the "Secured
Noteholders").

          b.     The  Borrower  shall  grant  to  the  Secured  Noteholders  the
security  interest  described  in  Schedule  I  attached  hereto.

     2.4     Remedies  Not  Waived.  No  delay  on the part of the Holder in the
             ---------------------
exercise of any right or remedy shall operate as a waiver thereto, and no single
or  partial exercise by Holder of any right or remedy shall preclude the further
exercise  thereof  or  the  exercise  of  any  other  right  or  remedy.

     2.5     Other.  Except  to  the  extent  otherwise contemplated hereby, the
             -----
Borrower hereby waives presentment, demand, protest, notice of protest, dishonor
and  non-payment  of this Series B Note and all notices of every kind and agrees
that  its  liability  hereunder  shall  be  unconditional.

     3.     Assignability;  Binding  Effect.  The provisions of Section 9 and 15
            -------------------------------
of  the  Agreement are incorporated herein by this reference and made applicable
to  this  Series  B  Note.

     4.     Severability.  Any  provision  in this Series B Note that is held to
            ------------
be inoperative, unenforceable, voidable or invalid in any jurisdiction shall, as
to  that  jurisdiction,  be  ineffective, unenforceable, void or invalid without
affecting  the  remaining  provisions in any other jurisdiction, and to this end
the  provisions  of  this  Series  B  Note  are  declared  to  be  severable.

     5.     Replacement  of  Series  B  Note.  Upon  receipt  by  the Company of
            --------------------------------
evidence  reasonably  satisfactory  to  it  of  the  loss, theft, destruction or
mutilation  of this Series B Note and (in case of loss, theft or destruction) of
an  indemnity  bond reasonably satisfactory to it, and upon reimbursement to the
Company  of  all  reasonable expenses incidental thereto, and upon surrender and
cancellation  of  the  Series  B  Note,  if mutilated, the Company will make and
deliver to the Holder a new Series B Note of like tenor in lieu of this Series B
Note.

     6.     Certain Restrictive Covenants.  For so long as this Series B Note is
            -----------------------------
outstanding,  the  Borrower  covenants and agrees that the Borrower will not pay
(i) cash management fees or cash bonuses to its officers or directors other than
cash  management  fees  or  cash  bonuses which are paid in accordance with past
practices  of  the  Borrower or are provided for in existing employment or other
agreements  or  are  customary for other companies in the Borrower's industry or
are customary for persons having responsibilities similar to those in respect of
which such cash management fees or cash bonuses are paid; or (ii) cash dividends
on  its  issued  and  outstanding  common  stock.  The answer to the question of
whether  a  cash  management  fee  or  cash bonus is covered by the restrictions
contained  in  Section  6(i) of this Series B Note shall be determined solely by
the  Borrower,  acting  in  good  faith.


                                 Page 94 of 106

     7.     Captions.  The descriptive headings of the various Sections or parts
            --------
of  this Series B Note are for convenience only and shall not affect the meaning
or  construction  of  any  of  the  provisions  hereof.

     8.     Governing  Law.  This  Series  B  Note  shall  be  governed  by, and
            --------------
construed  in  accordance with, the laws of the State of Delaware without giving
effect  to such state's conflicts of law provisions.  Each of the parties hereto
irrevocably  consents  to  the  jurisdiction  and venue of the federal and state
courts  located  in  the  State  of  Delaware.

     IN  WITNESS WHEREOF, and intending to be legally bound hereby, the Borrower
has  caused  this Series B Note to be executed by its duly authorized officer as
of  the  date  first  above  written.

                                       PENN  OCTANE  CORPORATION


                                   By:
                                      Ian T. Bothwell, Vice President and
                                      Chief  Financial  Officer


                                 Page 95 of 106

                                   Schedule I

                         Security Interest to be Granted
                         -------------------------------

1.     Security  interest  in  all  inventory  and  accounts  receivable  of the
Borrower,  subordinate  only  to the prior security interest thereon held by RZB
Finance  L.L.C.  and  Bayerische  Hypo-und  Vereinsbank  Aktiengeselischaft
(collectively,  "RZB").

2.     Security  interest  in  all  other  assets of the Borrower located in the
United  States  of  America,  including without limitation all of the Borrower's
right,  title  and  interest  to:  a  terminal  facility  in  Brownsville, Texas
(including  eleven  storage  and  mixing tanks, four mixed product truck loading
racks,  one  specification  product  propane  loading rack, two racks capable of
receiving  LPG  delivered  by  truck,  three  railcar loading racks which permit
loading and unloading of LPG by railcar and the rights under a lease for the 31+
                                                                               -
acres  of  real  estate  upon  which such facility is located) (collectively the
"Brownsville  Terminal");  a  132-mile  pipeline connecting Exxon Company, USA's
King  Ranch  Gas  Plant in Kleberg County, Texas and Duke Energy's La Gloria Gas
Plant in Jim Wells County, Texas to the Brownsville Terminal; 21 million gallons
of  storage  capacity in Markham, Texas; and two parallel pipelines running from
the Brownsville Terminal to the United States/Mexico border (the "US Pipelines")
and connecting to the Mexican Pipelines (as hereinafter defined).  The foregoing
security  interest shall be senior to all other liens on such assets (other than
liens  for  taxes  not  yet  due  and,  in  the  case of the US Pipelines, for a
contractor's  lien in an amount not to exceed $1 million), and RZB shall execute
an  appropriate  subordination and intercreditor agreement in form and substance
reasonably  satisfactory  to  PMG  as  collateral  agent.

3.     A  security  interest  in all of the Borrower's right, title and interest
to:  a  terminal  facility  in Matamoros, Mexico (including three storage tanks,
ten  specification product truck loading racks for LPG product and approximately
35+ acres upon which such facility is located (the "Matamoros Terminal") and two
  -
parallel  pipelines  running  from  the  Matamoros Terminal to the Mexico/United
States border (the "Mexican Pipelines") and connecting to the US Pipelines.  The
foregoing  security  interest  shall be senior to all other liens on such assets
(other  than  liens for taxes not yet due), and RZB shall execute an appropriate
subordination  and  intercreditor  agreement  in  form  and substance reasonably
satisfactory  to  PMG  as  collateral  agent.

4.     For  purposes  of  this  Schedule  I and the Series B Note to which it is
attached,  the  assets  described in the Items 1-2 hereof are referred to as the
"American  Assets"  and the assets described in Item 3 hereof are referred to as
the  "Mexican  Assets."


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