Marathon Oil Canada Limited Announces Dividend

Marathon Oil Canada Limited announced a dividend of CDN $0.3561 per share on its Non-Voting Exchangeable Shares (TSE: M). USX Corporation previously announced that its Board of Directors declared a dividend in U. S. dollars of 23 cents per share on USX- Marathon Group (NYSE: MRO) Common Stock. The record date and payment date for both dividends will be May 16, 2001 and June 9, 2001, respectively.

Marathon Oil Canada Limited is an indirect subsidiary of Marathon Oil Company. Marathon Oil Company is part of the USX-Marathon Group, a unit of USX Corporation, Pittsburgh, PA.

For more information on USX Corporation and Marathon Group, visit our websites at http://www.usx.com/ and http://www.marathon.com/.

Visit USX Corporation's web site at http://www.usx.com/. USX Corporation press releases are available through Company News On-Call by fax, 800-758- 5804, ext. 929150, or at http://www.prnewswire.com/comp/929150.html; or by fax, 800-758-5804, ext. 133204, or at http://www.prnewswire.com/comp/133204.html.

SOURCE: Marathon Oil Canada Limited

Contact: Roger E. Holliday, 713-296-3909, for Marathon Oil Canada
Limited

Website: http://www.usx.com/

Website: http://www.marathon.com/

Company News On-Call: http://www.prnewswire.com/comp/929150.html or fax,
800-758-5804, ext. 929150