I know most of you would sell a car if it got that low mpg. Today we had to see a doctor 150m away 1 way. I filled both of tanks on my f250 in my signature and jumped on the hwy. Set the cruise between 60 and 70 depending on the speed limit. Filled up when we got back into town. I think 18.9 mpg is fantastic for a 6500lb,square body 4x4 truck with no overdrive.