Exhibit 12.1

Marathon Oil Corporation

Computation of Ratio of Earnings to Fixed Charges

TOTAL ENTERPRISE BASIS - Unaudited

	Year Ended December 31,
(In millions)	2008		2007		2006		2005		2004
Portion of rentals representing interest	$	89	$	101	$	75	$	62	$	57
Capitalized interest, including discontinued operations		326		214		152		83		48
Other interest and fixed charges, including discontinued operations		153		135		147		240		279
Total fixed charges (A)	$	568	$	450	$	374	$	385	$	384
Earnings-pretax income with applicable adjustments (B)	$	7,367	$	7,055	$	9,014	$	4,557	$	2,905
Ratio of (B) to (A)		12.97		15.68		24.10		11.84		7.57