PENN OCTANE CORP Contracts & Agreements

FOURTHAMENDMENT TO SECURITIES PURCHASE AND SALEAGREEMENT (Filed With SEC on December 7, 2010)

MUTUALRELEASE (Filed With SEC on December 7, 2010)

RELEASE (Filed With SEC on December 7, 2010)

[SignaturePage Follows] (Filed With SEC on December 7, 2010)

SECURITIESPURCHASE AND SALE AGREEMENT Between CENTRALENERGY, LLC AsBuyer, RIOVISTA ENERGY PARTNERS, L.P. TheCompany and PENNOCTANE CORPORATION, AsSeller DATEDMAY 25, 2010 (Filed With SEC on May 28, 2010)

Current Assets (Filed With SEC on May 20, 2009)

the volatility of realized natural gas prices (Filed With SEC on April 14, 2009)

Current Assets (Filed With SEC on November 17, 2008)

the volatility of realized natural gas prices (Filed With SEC on April 15, 2008)

Current Assets (Filed With SEC on November 19, 2007)

Current Assets (Filed With SEC on August 20, 2007)

Net Current Assets (Filed With SEC on April 17, 2007)

Current Assets (Filed With SEC on November 20, 2006)

RIO VISTA GP LLC FIRST AMENDMENT TO AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT (Filed With SEC on October 11, 2006)

Purchase and Sale Agreement dated August 15, 2006 as amended and restated on August 15, 2006 entered into by and between Penn Octane Corporation and TransMontaigne Product... (Filed With SEC on August 14, 2006)

Purchase and Sale Agreement dated August 15, 2006 as amended and restated on August 15, 2006 entered into by and between Rio Vista Operating Partnership L.P. and TransMontaigne... (Filed With SEC on August 14, 2006)

Ella-Brownsville Pipeline Lease Agreement effective as of August 1, 2006 between Seadrift Pipeline Corporation and Penn Octane Corporation (Filed With SEC on August 14, 2006)

Matamoros LPG Mix Purchase and Sales Agreement made and entered into as of April 28, 2006, by and between Rio Vista Operating Partnership L.P. and P.M.I. Trading Limited (Filed With SEC on August 14, 2006)

Fourth Amendment to Purchase, Sale and Service Agreement for Propane/Butane Mix made and extend into effective March 1, 2006 by and between Exxon Mobil Gas and Power Marketing... (Filed With SEC on April 6, 2006)

Amendment No. 1 to Purchase and Sale Agreement between Rio Vista Operating Partnership L.P., Penn Octane International, LLC and TransMontaigne Product Services Inc., dated January... (Filed With SEC on April 6, 2006)

Amendment No. 1 to Purchase and Sale Agreement between Penn Octane Corporation and TransMontaigne Product Services Inc., dated January 26, 2006 (Filed With SEC on April 6, 2006)

First Amendment to the First Amended and Restated Agreement of Limited Partnership of Rio Vista Energy Partners L.P. dated as of October 26, 2005 (Filed With SEC on November 21, 2005)

First Amendment to the First Amended and Restated Agreement of Limited Partnership of Rio Vista Operating Partnership L.P. dated as of October 26, 2005 (Filed With SEC on November 21, 2005)

Amended and Restated Consulting Agreement dated November 15, 2005 between Penn Octane Corporation, Rio Vista Energy Partners L.P. and Jerome B. Richter (Filed With SEC on November 21, 2005)

Amended and Restated Promissory Note by Jerome B. Richter to the Company dated November 15, 2005 (Filed With SEC on November 21, 2005)

Agreement dated as of November 15, 2005 by and between Penn Octane Corporation and Jerome B. Richter (Filed With SEC on November 21, 2005)

Form of Amendment of Promissory Note(s) of Penn Octane Corporation due December 15, 2005 and Related Agreements dated September 30, 2005 (Filed With SEC on November 21, 2005)

Form of Escrow Agreement dated as of September 30, 2005 by and between Jerome B. Richter, Penn Octane Corporation and the Noteholders of Promissory Notes of Penn Octane due on... (Filed With SEC on November 21, 2005)

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PENN OCTANE CORP Contracts & Agreements