Exhibit 12.1

Marathon Oil Corporation

Computation of Ratio of Earnings to Fixed Charges

TOTAL ENTERPRISE BASIS - Unaudited

(Dollars in Millions)

	Year Ended December 31
	2007		2006		2005		2004		2003
Portion of rentals representing interest	$	101	$	75	$	62	$	57	$	63
Capitalized interest, including discontinued operations		214		152		83		48		41
Other interest and fixed charges, including discontinued operations		135		147		240		279		270
Total fixed charges (A)	$	450	$	374	$	385	$	384	$	374
Earnings-pretax income with applicable adjustments (B)	$	7,055	$	9,014	$	4,557	$	2,905	$	2,421
Ratio of (B) to (A)		15.68		24.10		11.84		7.57		6.47