Okay, the signature issue is figured out...

The Game: Guess the average MPG (to the 10th of a mile) for my trip to MT and back. Approximately 1,030 miles total.

The Truck: Just what you see in the signature...no performance mods. She scales at 7,800lbs with me and full fuel. We're hauling a bunch of stuff over, so figure 8,400lbs total. I've recorded every fuel stop since October. A "city" tank averaged 8.1mpg and a highway tank averaged 12.3mpg. Overall I average 10.6mpg. I keep my tires at max psi.

Details: I'll top off the tank as we leave town and fill it up when we reach our destination. That way the calculations are only for my highway miles and will not include driving around town. I'll average my calcs from my trip over and return journey. All calculations will be by hand.