SECURITIES AND EXCHANGE COMMISSION DP137

I Washington, D . C. 20549

I Form 20-F

I El REGISTRATION STATEMENT PURSUANT TO SECTION 12@) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR El ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended- Decemkr 3 1 , 1996

OR D TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECLWT'ES EXCHANGE ACT OF 1934 for the &tion period from to

Commission File Number: 33-86304

PETR~LEOS MEXICANOS (Exad mme of tegmmut as specified in its charier)

MEXICAN PETROLEUM ( T d o n of reghmnt's rrame into English)

United Mexican Stam (Jurisdiaion of incorprarion or o m t i o n )

Avenida Marina Nacional No. 329, Col. m u a c Mhico, D.F. 1131 1

Medco (Address of princrpai executive offices)

Securitis registered or to be mgkkred pursuant to W o n 12(b) of the Act

securities mgkkd or to be registered pursuant to Section 12@ of the Act:

Securitia registered or to be registered pursuant to W o n l5(d) of the Act:

lndimte the number of outstanding shares of each of the h e r ' s classes of capital or common stuck as of the close of the period mvered by the annual report:

N W Indicate by check mark whether the regishmt (1) has fied all reports required to be 61ed by Section 13 or

15(d) of the seamities Exchange Act of 1934 during the preceding It months (or for such shorter period that the regisfrant was required to Me such reports) and (2) has been ~ b j a t to such 6ling r e ~ u b n e n b for the past 90 days.

Y e s N o x

Indicate by check mark which fmancial statement item the registrant has elected to foilow:

Item 17 - Item 18 1L