Marathon President and CEO to Present at Lehman Brothers CEO Energy/Power Conference

HOUSTON, Aug. 20 /PRNewswire-FirstCall/ — Marathon Oil Corporation announced today that Clarence P. Cazalot, Jr., Marathon president and CEO, will be presenting at Lehman Brothers’ CEO Energy/Power Conference in New York on Wednesday, Sept. 3, 2008, at 11:05 a.m. EDT.

A live audio webcast of these remarks will be accessible via Marathon’s Web site at http://www.marathon.com/. This presentation and associated question and answer session may include forward-looking information. A replay of the presentation will be available and archived on Marathon’s Web site through Sept. 17, 2008.

Marathon is an integrated international energy company engaged in exploration and production; oil sands mining; integrated gas; and refining, marketing and transportation operations. Marathon, which is based in Houston, 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.

   Media Relations Contacts:    Lee Warren     713-296-4103                                Paul Weeditz   713-296-3910    Investor Relations Contacts: Howard Thill   713-296-4140                                Chris Phillips 713-296-3213                                Michol Ecklund 713-296-3919  

Marathon Oil Corporation

CONTACT: Media Relations, Lee Warren, +1-713-296-4103, Paul Weeditz,+1-713-296-3910, or Investor Relations, Howard Thill, +1-713-296-4140, ChrisPhillips, +1-713-296-3213, or Michol Ecklund, +1-713-296-3919, all of MarathonOil Corporation

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