I finished burning the tank of fuel that the dealership gave me, just for fun I decided to see how it ran on clear gas. Holy crap, 13.2 mpg running 87 octane e10, 16 mpg on Clear premium (I wish I could buy lower octane clear in Oregon the premium is expensive). All mixed driving. Cruising at 55 on the highway the truck was loafing along at 20mpg!!!