HOUSTON--(BUSINESS WIRE)--
April 7, 2011— Frontier Oil Corporation (NYSE: FTO) plans to announce
results for the quarter ended March 31, 2011 on Thursday, May 5, 2011.
Management has scheduled a conference call for the morning of May 5th
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 29497899. A
recorded replay of the call may be heard through May 19, 2011 by dialing
(888) 843-7419 (international callers (630) 652-3042), passcode
29497899. 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
Source: Frontier Oil Corporation
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