Rio Bravo Oil (SDGU) 10-Q 2013 Q2 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Thomas Bowman, the Chief Executive Officer of RIO BRAVO OIL. INC.(the "Company"), DOES HEREBY CERTIFY that:

1. The Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013 (the "Report"), fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

2. Information contained in the Report fairly presents, in all material respects, the financial condition and results of operation of the Company.

IN WITNESS WHEREOF, the undersigned has executed this statement this 14th day of August, 2013.

/s/ Thomas Bowman

Thomas Bowman

Principal Executive Officer

A signed original of this written statement required by Section 906 has been provided to Rio Bravo Oil, Inc. and will be retained by Rio Bravo Oil, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.