Exhibit 23.9
DEGOLYERAND MACNAUGHTON
5001 SPRING VALLEY ROAD
SUITE 800 EAST
DALLAS, TEXAS 75244
August 15, 2014
Mtro. Emilio R. Lozoya Austin
Director General
Petróleos Mexicanos
Avenida Marina Nacional No. 329
Torre Ejecutiva, Piso 44
Colonia Petróleos Mexicanos
11311 México D.F. México
Dear Mtro. Lozoya Austin:
We hereby consent to (a) all references to DeGolyer and MacNaughton as set forth under the heading “Experts” in the Registration Statement on Form F-4 filed by Petróleos Mexicanos (the Form F-4), (b) all references to DeGolyer and MacNaughton as set forth under the headings “Presentation of Information Concerning Reserves,” “Item 4. Information on the Company—Business Overview—Exploration and Production—Reserves,” and “Item 19. Exhibits. Documents filed as exhibits to this Form 20-F” in the Annual Report on Form 20-F of Petróleos Mexicanos for the year ended December 31, 2013 (the Form 20-F) incorporated in the Form F-4 by reference, and (c) the incorporation by reference in the Form F-4 of our third party report dated March 20, 2014, describing our review of the estimates of proved oil and condensate, natural gas liquids, sales gas, and total liquids equivalent reserves owned by the United Mexican States (Mexico), as of January 1, 2014, for certain fields located offshore of Mexico in the Southwest Marine Region, which report was originally filed as Exhibit 10.6 to the Form 20-F. The estimates included in our report were prepared in accordance with the reserves definitions of Rules 4-10(a) (1)-(32) of Regulation S-X of the United States Securities and Exchange Commission.
| Very truly yours, |
/S/ DEGOLYERAND MACNAUGHTON |
| DeGOLYER and MacNAUGHTON |
| Texas Registered Engineering Firm F-716 |