SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUERPURSUANT TO RULE 13a-16 OR 15d-16 UNDERTHE SECURITIES EXCHANGE ACT OF 1934

For the month of March, 2004Commission File Number 0-99

PETROLEOS MEXICANOS

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(Exact
  name of registrant as specified in its charter)




MEXICAN PETROLEUM

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(Translation
  of registrants name into English)




United Mexican States

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(Jurisdiction
  of incorporation or organization)




Avenida Marina Nacional No. 329Colonia HuastecaMexico, D.F. 11311Mexico

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(Address
  of principal executive offices)




Indicate
 by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form
 40-F.

Form 20-F  X        
       Form 40-F

Indicate
 by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule
 101(b)(1)

Yes     No   X

Indicate
 by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule
 101(b)(7)

Yes     No   X

Indicate
 by check mark whether the registrant by furnishing the information contained in this form is also thereby
 furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange
 Act of 1934.

Yes     No 
   X



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SOCIAL COMMUNICATIONS
 CORPORATE MANAGEMENT

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# BULLETIN NO. 64 / 2004

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DATE: 03/ 16/ 2004

PEMEX REQUESTED
 AN EXTENSION OF ITS STOCK-EXCHANGE CERTIFICATE PROGRAM

On
 March 10, 2004, Petróleos Mexicanos submitted to the Comisión Nacional Bancaria y de Valores (National
 Banking and Securities Commission) and to the Bolsa Mexicana de Valores, S.A. de C.V. (Mexican
 Stock Exchange) an application in order to carry out an extension of its existing stock issues,
 under the stock-exchange certificates program established in the Mexican market.

Subject
 to the conditions of the domestic market and to the acquisition of the required permits, Petróleos Mexicanos
 plans to issue notes for an amount of up to 15 billion pesos next March 24.

The
 leading intermediary distributors will be Acciones y Valores de México, S.A. de C.V., Casa de Bolsa
 Santander Serfín, S.A. de C.V. and Casa de Bolsa BBVA Bancomer S.A. de C.V., meanwhile ING (México),
 S.A. de C.V., Casa de Bolsa and ING Grupo Financiero shall participate as co-leader.

It
 is worthwhile mentioning that this bulletin does not constitute an announcement for a public bid or
 an offering of the securities described. The documents relative to these stock issues are available
 at the Internet website of Bolsa Mexicana de Valores, S.A. de C.V.: www.bmv.com.mx

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused
 this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| | Petroleos
      Mexicanos                                                                                        
| | -----------------------------------------------------------------------------------------------------------------
| | By: /s/ OCTAVIO ORNELAS ESQUINCA Octavio Ornelas Esquinca Managing 
             Director of Finance and Treasury



Date:
  March 24, 2004

FORWARD-LOOKING STATEMENTS

This
 report may contain forward-looking statements. These statements are statements that are not historical
 facts, and are based on managements current view and estimates of future economic circumstances, industry
 conditions, company performance and financial results. The words anticipates, believes, estimates,
 expects, plans and similar expressions, as they relate to the company, are intended to identify
 forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation
 of principal operating and financing strategies and capital expenditure plans, the direction of future
 operations and the factors or trends affecting financial condition, liquidity or results of operations
 are examples of forward-looking statements. Such statements reflect the current views of management
 and are subject to a number of risks and uncertainties. There is no guarantee that the expected events,
 trends or results will actually occur. The statements are based on many assumptions and factors, including
 general economic and market conditions, industry conditions, and operating factors. Any changes in such
 assumptions or factors could cause actual results to differ materially from current expectations.