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Vehicles refuel at a roadside Exxon gas station outside Aurora, New Mexico, U.S., on Tuesday, July 26, 2016. Exxon Mobil Corp. is scheduled to release earnings figures on July 29. Photographer: Sergio Flores/Bloomberg via Getty Images

Vehicles refuel at a roadside Exxon gas station outside Aurora, New Mexico, U.S., on Tuesday, July 26, 2016. Exxon Mobil Corp. is scheduled to release earnings figures on July 29. Photographer: Sergio Flores/Bloomberg via Getty Images