Fluor Awarded Front-end Engineering Contract for Louisiana Refinery Expansion

December 14, 2005

Fluor Corporation (NYSE: FLR) announced today that it has been selected by Marathon Petroleum Company LLC (MPC), a wholly-owned subsidiary of Marathon Oil Corporation (NYSE: MRO), to provide front-end engineering design (FEED) services for a proposed $2.2 billion expansion at the company's Garyville, La., refinery. Marathon's final investment decision for this expansion is subject to completion of the FEED and receipt of applicable permits. The FEED contract value was not disclosed and will be booked in the fourth quarter.

"Fluor is pleased to continue its long-standing relationship with Marathon by being part of an important project that would provide much-needed refining capacity to the U.S. We are dedicated to supporting Marathon's success on this project," said Jeff Faulk, Fluor's group president of Energy & Chemicals.

Fluor's services will include front-end engineering for new processing units, as well as utilities and off sites. The contract will be performed over a 12-month period and executed in Fluor's office in Houston, with support from the company's global engineering centers.

"Marathon looks forward to working with Fluor through the design phase of this important project, which would increase the capacity at our Garyville refinery from 245,000 barrels per day (bpd) to 425,000 bpd, enabling us to better meet the fuel supply needs of our customers," said Gary R. Heminger, Marathon executive vice president and president of MPC.

Fluor provides services on a global basis in the fields of engineering, procurement, construction, operations, maintenance and project management. Headquartered in Aliso Viejo, California, Fluor is a FORTUNE 500 company with revenues of nearly $9.4 billion in 2004. For more information, visit www.fluor.com.

This release contains forward-looking statements with respect to the Garyville expansion project. Some factors that could cause the actual results to be different than expected include satisfactory results of the FEED work, Marathon board and necessary regulatory approvals, crude oil supply and transportation logistics, availability of materials and labor, unforeseen hazards such as weather conditions, and other risks customarily associated with construction projects. The foregoing factors (among others) could cause actual results to differ materially from those set forth in the forward- looking statements. In accordance with the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995, Marathon Oil Corporation has included in its Annual Report on Form 10-K for the year ended December 31, 2004, and subsequent Forms 10-Q and 8-K, cautionary language identifying other important factors, though not necessarily all such factors, that could cause future outcomes to differ materially from those set forth in the forward-looking statements.

Leann Vandergrift/Lisa Boyette
Media Relations
949.349.7420/3652 tel

Ken Lockwood
Investor Relations
949.349.3815

Media Relations, Leann Vandergrift, +1-949-349-7420, or LisaBoyette, +1-949-349-3652, or Investor Relations, Ken Lockwood,+1-949-349-3815, all of Fluor Corporation//Web site: http://www.fluor.com /