(Bloomberg) -- Marathon Oil Co., the largest
refiner in the U.S. Midwest, said it switched to using Light
Louisiana Sweet crude oil to estimate refining margins in the
second quarter because West Texas Intermediate, the U.S.
benchmark, no longer gives an accurate indication of its costs.
The Texas grade, known as WTI, lost value against domestic
and foreign crudes in the quarter because refinery disruptions
cut demand and caused a glut at the storage facility in Cushing,
Oklahoma, the delivery point for New York futures. The Louisiana
crude cost an average $5.63 a barrel more than WTI in the
quarter, up from a $1.48 premium a year earlier, Marathon said.
Read more at Bloomberg Energy News