Marathon Vice President of Investor Relations and Public Affairs to Present at UBS 2008 Global Oil and Gas Conference

HOUSTON, May 12 /PRNewswire-FirstCall/ — Marathon Oil Corporation today announced that Howard J. Thill, vice president, Investor Relations and Public Affairs for Marathon, will be presenting at the UBS 2008 Global Oil and Gas Conference on Wednesday, May 21, 2008, at 8:05 a.m. CDT. A live audio webcast of these remarks will be accessible via Marathon’s Web site at http://www.marathon.com/.

A replay of these remarks will be available for approximately two weeks following the presentation. The presentation and associated question and answer sessions may include forward-looking information.

Marathon is an integrated international energy company engaged in exploration and production; oil sands mining; integrated gas; and refining, marketing and transportation operations. Marathon 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, visit the Company’s Web site at http://www.marathon.com/.

   Media Relations Contacts:     Lee Warren          713-296-4103                                 Scott Scheffler     713-296-4102   Investor Relations Contacts:  Howard Thill        713-296-4140                                 Chris Phillips      713-296-3213                                 Michol Ecklund      713-296-3919  

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Marathon Oil Corporation

CONTACT: Media Relations, Lee Warren, +1-713-296-4103, Scott Scheffler,+1-713-296-4102, Investor Relations, Howard Thill, +1-713-296-4140, ChrisPhillips, +1-713-296-3213, Michol Ecklund, +1-713-296-3919, all of MarathonOil Corporation

Web site: http://www.marathon.com/