Hey folks, Since I've got to retune my car to pass emissions and function properly with the aftermarket super charger, i have to run two separate ECUs. So i'm considering swapping to e85. my mechanic says that i will pay less in fuel, but lose mpg. currently it looks like a 14% gain in cheaper fuel offset by his estimation in an 8 mpg (30%) loss in fuel economy. except for the much better performance and better emissions, it would appear to be a less than optimal set up. opinions on which way to go?