January 18, 2011 -–Frontier Oil Corporation (NYSE: FTO) plans to announce results for the quarter ended December 31, 2010 on Thursday, February 24, 2011. Management has scheduled a conference call for the morning of February 24th at 10:00 a.m. CT to discuss the financial results and business outlook.

To access the call, which is open to the public, please dial (800) 447-0521 (international callers (847) 413-3238), passcode 28865188. A recorded replay of the call may be heard through March 10, 2011 by dialing (888) 843-7419 (international callers (630) 652-3042), passcode 28865188. In addition, the real-time conference call and a recorded replay will be available via webcast by registering from the Investor Relations page of our website www.frontieroil.com.

Frontier operates a 135,000 barrel-per-day refinery located in El Dorado, Kansas, and a 52,000 barrel-per-day refinery located in Cheyenne, Wyoming, and markets its refined products principally along the eastern slope of the Rocky Mountains and in other neighboring plains states.

Frontier Oil Corporation
Kristine Boyd, (713) 688-9600 x135