Yup...I stopped running it in my 03 cobra cause I would have needed bigger fuel pumps to run nitrous. And the fuel milage sucked, from 10mpg down to 7mpg.To get the same performance from E-85 (or some blends are actually 80-90% depending on season) you need 40% more fuel then with gas. There are alot of Mustang guys switching there Turbo Stangs to Ethanol so that they can run insane boost numbers and not have to buy race fuel. The rule of thumb is you need twice as much injector and pump to get the same HP as with Gasoline. Example: a pump rated for 1000HP is only going to support 500-600hp on E85.