[BruceMiller]

Our 2002 Corvette gets on average between 28-30 mpg At 70mph it's basically idling at 1,500 RPM

Our '07 Tahoe was advertised at 22mpg highway, but it get's only 13.5mpg, it's a displacement on demand engine so it's supposed to switch from 8 cyl to 4 cyl at times to increase gas mileage, but as you can tell it does a poor job of it.

Our '07 F150 Pickup get's about 14mpg.

Both the Tahoe and the Pickup are flex fuel vehicles, which at this time is completely meaningless. Because we use Corn based Ethanol here in the U.S. it takes close to a gallon of gasoline to create one gallon of E85. Maybe in the future, we can use some 3rd world technologies and start to use switch grass instead of corn, then E85 will be cheaper.