Marathon Clarifies News Release on Costs Incurred

Marathon Oil Corp. issued a news release yesterday, Feb. 19, with details regarding the Company's 2008 reserve additions and costs incurred for property acquisition, exploration and development activities related to oil and gas properties.

The total costs incurred were $3.4 billion for 2008 and $9.0 billion for the three-year period ended Dec. 31, 2008. In the original release, dollar amounts were rounded to the nearest billion and were reported as $3 billion and $9 billion, respectively.