I agree that the smaller trucks with say a 3.0L get the same or very close to the same gas mileage as a 5.4L big truck. I currently have a 2002 Sport Trac with 4.0L and I get about 15 to 19 mpg and am considering getting a new 2006 F 150 with a 5.4L and expect to get the same mpg. The Sport Trac has a 5 speed auto trans. that I expected to help more with the mpg than it did. Maybe this E85 will catch on and it will be cheaper to run our trucks.