Canada Heavy Oil Weakest in Three Weeks on Lemont Refinery Fire

Canadian heavy crude weakened to its widest discount to the U.S. benchmark in almost three weeks after an Illinois refinery that processes the grade curtailed operations because of a fire.

Citgo Petroleum Corp.’s Lemont, Illinois, refinery was running at reduced rates after the crude unit fire late yesterday, Fernando Garay, a company spokesman in Houston, said in an e-mail. Crude oil pipelines from Alberta to the U.S. were also full, according to people familiar with the matter.