Exhibit 12.2

Marathon Oil Corporation
Computation of Ratio of Earnings to Fixed Charges
TOTAL ENTERPRISE BASIS — Unaudited
(Dollars in Millions)

	Year Ended December 31
	2005		2004		2003		2002		2001
Portion of rentals representing interest	$	62	$	57	$	63	$	66	$	54
Capitalized interest, including discontinued operations		83		48		41		16		27
Other interest and fixed charges, including discontinued operations		240		279		270		316		349
Total fixed charges (A)	$	385	$	384	$	374	$	398	$	430
Earnings-pretax income with applicable adjustments (B)	$	4,618	$	2,843	$	2,422	$	1,446	$	3,365
Ratio of (B) to (A)		11.99		7.40		6.48		3.63		7.83