Document:

Exhibit 10.2

                     AMENDMENT #2 TO PRODUCT SALES AGREEMENT
                     ---------------------------------------

This Amendment (herein "Amendment #2") to Product Sales Agreement is made
effective as of this 28th day of January, 2005 ("the Effective Date"), by and
between Penn Octane Corporation, a Delaware corporation ("Penn Octane"), and
Koch Hydrocarbon, LP, a Delaware limited partnership ("KHLP"),

WHEREAS, Penn Octane and KHLP entered into that certain Product Sales Agreement
dated the 9th day of December, 2003 (herein "the Agreement"), and

WHEREAS, Penn Octane and KHLP entered into an Amendment of the Agreement dated
December 17, 2004

WHEREAS, Penn Octane and KHLP wish to again amend the Agreement as of the
Effective Date of this Amendment #2.

Now therefore, in consideration of the undertakings hereinafter set forth, the
parties agree to amend the Agreement as follows;

     1.   All terms and conditions of the Agreement, as amended, shall he
          suspended effective at the end of the day on January 31, 2005, except
          with respect to obligations accrued as of such time; and the
          Agreement, as amended, shall remain suspended until the beginning of
          the day of October 1, 2005.

     2.   Beginning on April 1, 2005 and continuing to the end of the day of
          July 31, 2005, Penn Octane and KHLP or its assignee shall each
          negotiate in good faith the terms and conditions of a potential new
          agreement that, if mutually agreed upon, shall supersede and replace
          the Agreement and take effect at the beginning of the day October 1,
          2005. Nothing herein, or in the Agreement, as amended, shall require
          either Penn Octane or KHLP or its assignee to agree upon any terms or
          conditions suggested by the other.

     3.   In the event that by the end of the day of July 31, 2005 Penn Octane
          and KHLP or its assignee should be unable reach agreement on a new
          agreement to take effect at the beginning of the day on October 1,
          2005, then this Amendment and the Agreement shall terminate at the
          end of the day on July 31, 2005, and neither Party shall have further
          obligation to the other except for obligations that may have accrued
          prior to the beginning of the day of February 1, 2005.

<PAGE>
     4.   Paragraph 24 of the Agreement, as amended, is amended to read as
          follows:

               "Neither Party shall assign its rights or delegate its
               duties under this Agreement without the prior written
               consent of the other Party, which consent shall not be
               unreasonably withheld, conditioned, delayed or denied;
               except that KHLP may assign and/or delegate its rights and
               duties under this Agreement to Koch Supply and Trading, LP
               (KS&T) without the consent of Perm Octane. Any attempted
               assignment made in contravention of this section shall be
               void at the option of the other Party. Upon such assignment
               and delegation to KS&T, and the assumption thereof by KS&T,
               KHLP shall be discharged of its obligations hereunder,
               except for those accrued to the date of such assignment and
               delegation"

IN WITNESS WHEREOF, Perm Octane and KHLP have executed this Amendment on the
28th day of January, 2005 but effective on the Effective Date.

Koch Hydrocarbon, LP
By: NGL/GP, LLC, its general partner

By:    /s/ Mark W. Dobbins
     -----------------------------------
Printed name:    Mark W. Dobbins
               -------------------------
Its:    Sr. Vice President
      ----------------------------------

PENN OCTANE CORPORATION

By:    /s/ Jerry L. Lockett
     -----------------------------------
Printed name:    Jerry L. Lockett
               -------------------------
Its:    J.B.
      ----------------------------------

<PAGE>Exhibit 10.19

                                NOXSO CORPORATION

February 11, 2005

Mr. Gary T. Robinson, Managing Member
ROCKY POINT PARTNERS, LLC 704 Steamboat Road
Greenwich, CT 06830

                      Transmitted Via E-Mail for Signature
Dear Gary:

In connection with the quarterly review of the financial statements of NOXSO
CORPORATION ("NOXSO"), the auditors have requested a confirmation from ROCKY
POINT PARTNERS, LLC ("RPP") related to the sale of the 151 acres in Dallas,
Texas by RPP to NOXSO.

Specifically, it is understood and agreed by both NOXSO and RPP that certain
provisions under the original Agreement have been modified, that the $2.2
million mortgage loan will be sought, but that the legal obligation to transfer
legal and beneficial ownership of the property to NOXSO became firm in November
2004. Therefore, it was agreed that the closing for this transaction was
effective as of the date of the Agreement, November 1, 2004, with the issuance
of the $300,000 promissory note and the two $1,700,000 convertible Promissory
Notes; and, that as of that date, RPP recognizes its obligation to deliver the
title to the property to NOXSO and RPP is in the process of doing so. It is
recognized that all parties related to this transaction are committed and bound
to perform under the terms of the NOXSO-RPP Agreement, as modified.

Please confirm that the foregoing correctly sets forth our agreement by signing
and returning a copy of this letter to NOXSO by fax at (801) 457-3752.

Sincerely,
NOXSO CORPPORATION

By: /s/ Richard J. Anderson
   ------------------------------
   Richard J. Anderson
   CEO & President

AGREED TO:  ROCKY POINT PARTNERS, LLC
The foregoing correctly states the understanding
of ROCKY POINT PARTNERS, LLC as
of February 11, 2005.

ROCKY POINT PARTNERS, LLC

By: /s/ Gary T. Robinson
---------------------------
Gary T. Robinson
Its: Managing Member

                     1065 South 500 West Bountiful, UT 84010
         (801) 296-6976 Fax: (801) 457-3752 e-mail: noxso-admin@pi77.netExhibit 10.20                                                             1 of 2

                               NOXSO CORPORATION,
                             a Virginia corporation

                           CONVERTIBLE PROMISSORY NOTE

No. 2005/11-003                                                $1,600,000.00 USD

NEITHER THIS PROMISSORY NOTE NOR THE UNDERLYING SECURITIES HAVE BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, OR UNDER ANY OTHER APPLICABLE STATE SECURITIES
LAWS. NEITHER THIS PROMISSORY NOTE NOR ANY SECURITIES ISSUED PURSUANT TO ITS
CONVERSION MAY BE SOLD, PLEDGED, TRANSFERRED OR ASSIGNED EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND UNDER APPLICABLE
STATE SECURITIES LAWS, OR IN A TRANSACTION WHICH IS EXEMPT FROM REGISTRATION
UNDER THE PROVISIONS OF THE SECURITIES ACT AND UNDER PROVISIONS OF APPLICABLE
STATE SECURITIES LAWS.

         1. Promise to Pay. NOXSO Corporation, a Virginia corporation
("Company"), for value received, hereby promises to pay to ROCKY POINT PARTNERS,
LLC ("Holder"), the principal sum of ONE MILLION SIX HUNDRED THOUSAND Dollars
($1,600,000.00), with interest at the rate of three percent (3.0%) per annum
until this Note has been paid in full or converted pursuant to the provisions
hereof. Interest shall first begin to accrue under this Note on March 1, 2005.

         2. Payments. Principal and interest shall be due and payable in a
single balloon payment (the "Maturity Date") on the earlier of (i) November 1,
2005 or (ii) the conversion of this note as provided for under Item 3., below.
Payments shall be made in lawful money of the United States of America to Holder
at the address provided to the Company by the Holder, as appears on this
instrument below or at such other addresses as sent by Holder to the Company by
certified U.S. mail at least twenty (20) days before said payment date.

         3. Conversion Privilege. At any time on or before 120 days from the one
year anniversary date of issuance while this Note is outstanding, the Holder of
this Note shall have the right, at Holder's option, from time to time to convert
all or part of the principal and accrued, but unpaid, interest of this Note into
shares of the Company's common stock at the rate of one share of common stock
for every One Dollar and Twenty Cents ($1.20) in principal and accrued interest
that is converted. Upon election to convert this Note, the Note will be
cancelled if the entire amount owing is converted or the Note will be endorsed
to show partial payment if less than the entire amount owing is converted. The
Holder may convert all or part of the principal and accrued interest if any is
converted. In order to convert, the Holder must surrender this Note to the
Company at the Company's principal offices for cancellation or endorsement, as
applicable, and the Company shall, as promptly as practicable after the
surrender, deliver to the Holder a certificate or certificates representing the
securities into which this Note may be converted. Fractional shares shall not be
issued, but the conversion price of such fractional share will be paid in cash
to the Holder. No payment or adjustment shall be made upon any conversion with
respect to any dividend on the common stock delivered upon conversion.

         4. Restrictions on Transfer. This Note has not been registered under
the Securities Act of 1933. This Note, or any right hereunder, may not be
enforced against the Company by any Holder, except the original Holder herein,
and the Company shall not be obligated to recognize any purported transferee or
assignee, (i) unless there is an effective registration covering the Note or
underlying right under the Securities Act of 1933 and applicable state
securities laws, (ii) unless the Company receives an opinion of an attorney,
licensed to practice within the United States, that the transfer of the Note, or
any underlying right, complies with the requirements of the Securities Act of
1933 and any relevant state securities law, or (iii) unless the transfer is made
pursuant to Rule 144 under the Securities Act of 1933. Any permitted transferee
or assignee shall be subject to the restrictions and to the terms of this Note
and the Company may require said transferee or assignee to execute and deliver
such further instruments evidencing or acknowledging the same.

<PAGE>

         5. Rights of the Holder. The Holder shall not, by virtue hereof, be
entitled to any rights of a shareholder in the Company, either at law or equity,
unless and until securities granting shareholder rights are issued pursuant to
the conversion provisions hereof.

         6. Notices. Any notices required or permitted hereunder shall be in
writing and shall be given by personal delivery; by deposit in the United States
mail, certified mail, return receipt requested, postage prepaid; or by
established express delivery service, freight prepaid. Notices shall be
delivered, addressed, or transmitted to the parties at the following addresses,
which may be changed by a notice given to the other party in accordance with
this Section. The date notice is deemed to have been given, received and become
effective shall be the date on which the notice is delivered, if notice is given
by personal delivery, two (2) days following the date of deposit in the mail, if
the notice is sent through the United States mail, or the date of actual
receipt, if the notice is sent by express delivery service.

         The Borrower's address is:

         NOXSO Corporation
         Attn. President
         1065 South 500 West
         Bountiful, Utah 84010
         Telephone: (801) 296-6976
                    Fax: (801) 296-6977
                    e-Fax: (801) 457-3752
         e-mail:  NOXSO-Pres@pi77.net
         The Lender's address is:

         ROCKY POINT PARTNERS, LLC
         Gary T. Robinson, Managing Member
         704 Steamboat Road
         Greenwich, CT 06830
         Telephone:(203) 868-2128
         Fax:
         e-mail: lexxuscap@yahoo.com

         7. Miscellaneous.

                  7.1. The headings of this Note are for purposes of reference
only and shall not limit or define the meaning of any provision of this Note.

                  7.2. If suit or action is instituted in connection with any
controversy arising out of this Note, or in the enforcement of any rights
hereunder, the prevailing party shall be entitled to recover in addition to
costs such sums as the court may adjudge as reasonable attorney's fees,
including attorney's fees incurred in any appeal.

                  7.3. This Note shall be governed by the laws of the State of
Utah. Any legal action to enforce or obtain an interpretation of this Agreement
may be filed in the Second Judicial District Court in Davis County or the United
States District Court in Salt Lake City, Utah, and the parties consent to the
exercise of personal over them by said courts.

                  7.4. In computing any period of time pursuant to this Note,
the day of the act, event or default from which the designated period of time
begins to run shall be included, unless it is a Saturday, Sunday, or a legal
holiday, in which event the period shall begin to run on the next day which is
not a Saturday, Sunday, or legal holiday, in which event the period shall run
until the end of the next day thereafter which is not a Saturday, Sunday, or
legal holiday.

                                       2
<PAGE>

                  7.5. Nothing herein shall be construed to be to the benefit of
any third party, nor is it intended that any provision shall be for the benefit
of any third party.

         IN WITNESS WHEREOF, this Note is executed by NOXSO Corporation, to be
effective as of the 1st day of November, 2004.

                                              NOXSO CORPORATION,
                                              a Virginia corporation

                                              By  /s/ Richard J. Anderson
                                                 -----------------------------
                                                 Richard Anderson, President

                                       3
<PAGE>
Exhibit 10.20                                                             2 of 2

                               NOXSO CORPORATION,
                             a Virginia corporation

                           CONVERTIBLE PROMISSORY NOTE

No. 2005/11-004                                                $1,600,000.00 USD

NEITHER THIS PROMISSORY NOTE NOR THE UNDERLYING SECURITIES HAVE BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, OR UNDER ANY OTHER APPLICABLE STATE SECURITIES
LAWS. NEITHER THIS PROMISSORY NOTE NOR ANY SECURITIES ISSUED PURSUANT TO ITS
CONVERSION MAY BE SOLD, PLEDGED, TRANSFERRED OR ASSIGNED EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND UNDER APPLICABLE
STATE SECURITIES LAWS, OR IN A TRANSACTION WHICH IS EXEMPT FROM REGISTRATION
UNDER THE PROVISIONS OF THE SECURITIES ACT AND UNDER PROVISIONS OF APPLICABLE
STATE SECURITIES LAWS.

         1. Promise to Pay. NOXSO Corporation, a Virginia corporation
("Company"), for value received, hereby promises to pay to ROCKY POINT PARTNERS,
LLC ("Holder"), the principal sum of ONE MILLION SIX HUNDRED THOUSAND Dollars
($1,600,000.00), with interest at the rate of three percent (3.0%) per annum
until this Note has been paid in full or converted pursuant to the provisions
hereof. Interest shall first begin to accrue under this Note on March 1, 2005.

         2. Payments. Principal and interest shall be due and payable in a
single balloon payment (the "Maturity Date") on the earlier of (i) November 1,
2005 or (ii) the conversion of this note as provided for under Item 3., below.
Payments shall be made in lawful money of the United States of America to Holder
at the address provided to the Company by the Holder, as appears on this
instrument below or at such other addresses as sent by Holder to the Company by
certified U.S. mail at least twenty (20) days before said payment date.

         3. Conversion Privilege. At any time on or before 120 days from the one
year anniversary date of issuance while this Note is outstanding, the Holder of
this Note shall have the right, at Holder's option, from time to time to convert
all or part of the principal and accrued, but unpaid, interest of this Note into
shares of the Company's common stock at the rate of one share of common stock
for every One Dollar and Twenty Cents ($1.20) in principal and accrued interest
that is converted. Upon election to convert this Note, the Note will be
cancelled if the entire amount owing is converted or the Note will be endorsed
to show partial payment if less than the entire amount owing is converted. The
Holder may convert all or part of the principal and accrued interest if any is
converted. In order to convert, the Holder must surrender this Note to the
Company at the Company's principal offices for cancellation or endorsement, as
applicable, and the Company shall, as promptly as practicable after the
surrender, deliver to the Holder a certificate or certificates representing the
securities into which this Note may be converted. Fractional shares shall not be
issued, but the conversion price of such fractional share will be paid in cash
to the Holder. No payment or adjustment shall be made upon any conversion with
respect to any dividend on the common stock delivered upon conversion.

         4. Restrictions on Transfer. This Note has not been registered under
the Securities Act of 1933. This Note, or any right hereunder, may not be
enforced against the Company by any Holder, except the original Holder herein,
and the Company shall not be obligated to recognize any purported transferee or
assignee, (i) unless there is an effective registration covering the Note or
underlying right under the Securities Act of 1933 and applicable state
securities laws, (ii) unless the Company receives an opinion of an attorney,
licensed to practice within the United States, that the transfer of the Note, or
any underlying right, complies with the requirements of the Securities Act of
1933 and any relevant state securities law, or (iii) unless the transfer is made
pursuant to Rule 144 under the Securities Act of 1933. Any permitted transferee
or assignee shall be subject to the restrictions and to the terms of this Note
and the Company may require said transferee or assignee to execute and deliver
such further instruments evidencing or acknowledging the same.

<PAGE>

         5. Rights of the Holder. The Holder shall not, by virtue hereof, be
entitled to any rights of a shareholder in the Company, either at law or equity,
unless and until securities granting shareholder rights are issued pursuant to
the conversion provisions hereof.

         6. Notices. Any notices required or permitted hereunder shall be in
writing and shall be given by personal delivery; by deposit in the United States
mail, certified mail, return receipt requested, postage prepaid; or by
established express delivery service, freight prepaid. Notices shall be
delivered, addressed, or transmitted to the parties at the following addresses,
which may be changed by a notice given to the other party in accordance with
this Section. The date notice is deemed to have been given, received and become
effective shall be the date on which the notice is delivered, if notice is given
by personal delivery, two (2) days following the date of deposit in the mail, if
the notice is sent through the United States mail, or the date of actual
receipt, if the notice is sent by express delivery service.

                  The Borrower's address is:

                  NOXSO Corporation
                  Attn. President
                  1065 South 500 West
                  Bountiful, Utah 84010
                  Telephone: (801) 296-6976
                             Fax: (801) 296-6977
                             e-Fax: (801) 457-3752
                  e-mail:  NOXSO-Pres@pi77.net
                  The Lender's address is:

                  ROCKY POINT PARTNERS, LLC
                  Gary T. Robinson, Managing Member
                  704 Steamboat Road
                  Greenwich, CT 06830
                  Telephone: (203) 868-2128
                  Fax:
                  e-mail: lexxuscap@yahoo.com

         7. Miscellaneous.

                  7.1. The headings of this Note are for purposes of reference
only and shall not limit or define the meaning of any provision of this Note.

                  7.2. If suit or action is instituted in connection with any
controversy arising out of this Note, or in the enforcement of any rights
hereunder, the prevailing party shall be entitled to recover in addition to
costs such sums as the court may adjudge as reasonable attorney's fees,
including attorney's fees incurred in any appeal.

                  7.3. This Note shall be governed by the laws of the State of
Utah. Any legal action to enforce or obtain an interpretation of this Agreement
may be filed in the Second Judicial District Court in Davis County or the United
States District Court in Salt Lake City, Utah, and the parties consent to the
exercise of personal over them by said courts.

                  7.4. In computing any period of time pursuant to this Note,
the day of the act, event or default from which the designated period of time
begins to run shall be included, unless it is a Saturday, Sunday, or a legal
holiday, in which event the period shall begin to run on the next day which is
not a Saturday, Sunday, or legal holiday, in which event the period shall run
until the end of the next day thereafter which is not a Saturday, Sunday, or
legal holiday.

                                       2
<PAGE>

                  7.5. Nothing herein shall be construed to be to the benefit of
any third party, nor is it intended that any provision shall be for the benefit
of any third party.

         IN WITNESS WHEREOF, this Note is executed by NOXSO Corporation, to be
effective as of the 1st day of November, 2004.

                                                 NOXSO CORPORATION,
                                                 a Virginia corporation

                                                 By  /s/ Richard J. Anderson
                                                    ----------------------------
                                                    Richard Anderson, President

                                       3

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