Add 37” tires and 4.10 gears to that Shelby F150 and it would be a different story. The Shelby F150 front end is moderately aerodynamic as far as trucks are concerned, especially compared to a Raptor.I had a Shelby F150 with the 5.0 and the Whipple supercharger. I averaged 14.5 mpg daily driving. It was running 755 hp. The 5.2 is a different animal, but thought I'd throw some hope of 10+ mpg your way.