With only 1800 miles on the truck, I doubt there's anything wrong with it. I drove the trips we went on. Miles / gallons. Runs and drives exactly the same on E85 as it does on gasoline.

I think the variable valve timing and 9.8:1 compression ratio has a lot to do with it.

I almost didn't say anything because I knew you guys would never believe it.

Now to be fair, at the place where someone I know works, they have a fleet of 1999 flex fuel Rangers. He says those get 20mpg on gasoline and 12mpg on E85. Those lack the higher compression ratio and variable valve timing of the newer motors.