[thackney]

But it is sold by the gallon, not the BTU. Miles per dollar is the efficiency most people want.

[em2vn]

E85 gives you fewer miles per dollar because of the lower BTU value of E85.

[sportutegrl]

Two publications, Consumer Reports and CARandDRIVER in recent road tests or on an oval track, in 2006 trials found that E85 (gasoline mixed with 85 percent alcohol) has approximately 30 percent less mileage as compared to 87 octane gasoline. At prices of gasoline and E85 in August, 2006, the fuel costs to travel 400 miles (road) with E85 ($3.99) would have exceeded gasoline ($2.49), or a Tahoe Chevrolet went 400 miles on a tankful of gasoline versus the Tahoe going only 290 miles on a tankful of E85.

And now you know the rest of the story.

[Old Professer]

I have to disagree; most people hate to pump gas so it would be necessary to double the tank size to make people think they are only using half a tank of fuel as before while not realizing they used 11/2 times as much.