[Hung Tau Racer]

to my knowledge the ethanol based fuel E85 is 105 octane which means more boost more power but lower gas mileage. The E85 gas is also much cheaper to buy than say 100 octane race gas. So it might not be worth it for the companies that make it but until they stop making it it is almost like a cheap race gas. If of course you have the right fuel sytem to handel ethanol based fuels.