CSR Press Release

HOUSTON, TX - April 23, 2009 - In conjunction with World Malaria Day on April 25, 2009, Marathon Oil Corporation (NYSE: MRO) announces their latest episode of Discover Marathon entitled "The Fight Against Malaria."

In this episode, Adel Chaouch, director of Corporate Social Responsibility for Marathon, discusses the enormous impact malaria has across the globe, the impressive results achieved by Marathon and its partners in the Bioko Island Malaria Control Project located in Equatorial Guinea where Marathon has operations, as well as the strategy to share best practices and coordinate efforts to eradicate this disease and save lives.

Listeners are encouraged to subscribe to Discover Marathon via the RSS Feed located on the Company's Web site, which automatically downloads new podcast episodes to the subscribers preferred news aggregator.

Marathon is an integrated international energy company engaged in exploration and production; oil sands mining; integrated gas; and refining, marketing and transportation operations. Marathon is based in Houston and has principal operations in the United States, Angola, Canada, Equatorial Guinea, Gabon, Indonesia, Ireland, Libya, Norway and the United Kingdom. Marathon is the fourth largest United States-based integrated oil company and the nation's fifth largest refiner. For more information, please visit our Web site at http://www.marathon.com.

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