Widening differentials between the prices of U.S. light, sweet crude and Brent will help boost earnings at refiner Marathon Petroleum, CEO Gary Heminger told CNBC's "Street Signs" on Wednesday.
"If you look at the WTI-Brent spread, and really look at where this crude is coming from in the U.S...as this production tries to find a home, it's certainly widening those spreads," the Marathon executive said.
Heminger added that the increased U.S. energy production from unconventional investment in alternative energy such as shale, as well as cheaper U.S. crude relative to Brent, should be a "catalyst for our earnings."