Exhibit 12.2

PETRÓLEOS MEXICANOS, SUBSIDIARY ENTITIES AND SUBSIDIARY COMPANIES

Computation of ratio of earnings to fixed charges

(In thousands of Mexican pesos)

	March, 31, 2017			March 31, 2018
IFRS
Fixed Charges:
Interest capitalized in fixed assets		1,525,215			473,479
Interest expense		30,702,314			36,541,035
Amortization premiums related to indebtedness		(1,745,126	)		(2,598,077	)
Estimate of the interest within rental expense		486,719			442,415
Total Fixed Charges		30,969,122			34,858,852
Net income (loss)		87,935,293			113,312,111
Income Tax and Others		2,486,092			787,868
Profit sharing in subsidiaries and affiliates (income from equity investees)		(241,527	)		(285,187	)
Pretax income from continuing operations before income from equity investees		90,179,858			113,814,792
Fixed Charges:		30,969,122			34,858,852
Amortization of interest capitalized		61,009			18,939
Interest capitalized in fixed assets		(1,525,215	)		(473,479	)
Earnings		119,684,774			148,219,104
Ratio of earnings to fixed charges		3.86			4.25