[Mindz]

Here's a comment from that link.

I saw an E85 sticker on the car. E85 contains 85% Ethanol, and 15% Gasoline. A lot of new cars are able to run on E85. Old cars like his, have to be adjusted in order to run on E85. I bet you he counts only the 15% Gasoline to come up with 110 mpg. My car runs on E85. If I only count the Gasoline part in my tank, I get 190 mpg.