Premcor to Announce Fourth Quarter 2004 Results January 27, 2005

Premcor to Announce Fourth Quarter 2004 Results January 27, 2005 OLD GREENWICH, Conn., Jan. 7 /PRNewswire-FirstCall/ -- Premcor Inc. (NYSE: PCO) announced today that it will host a conference call on January 27, 2005 at 11:00 a.m. EST to discuss fourth quarter 2004 results and to provide an update on company operations. Fourth quarter results will be released earlier that day. Interested parties may listen to the live conference call on the Internet by logging on to the investor relations section of the Premcor Inc. website at http://www.premcor.com/. Slides for the conference call will also be included on the Investor Relations section of our website. There will also be a recorded playback available until February 7, 2005 at (800) 925-1762 or (402) 998-0033. Premcor Inc. is one of the largest independent petroleum refiners and marketers of unbranded transportation fuels and heating oil in the United States. DATASOURCE: Premcor Inc. CONTACT: Karyn Ovelmen, +1-203-698-5964 (Media/Investors), or Colin Murray, +1-203-698-5921 (Investors), both of Premcor Inc. Web site: http://www.premcor.com/