Just took a 400 (x2) mile roadtrip. Mostly into a strong headwind both ways, maybe 60-degrees from head-on, and averaging 75-80MPH.... 14-16 mpg. Ouch. But, gas is CHEAP, so it didn't really sting much, and the truck ran like a top. Now that I'm back to normal city/highway driving, I'm back to 20. These SWB trucks are none too slippery.