99.9 cents all day everyday at the United down Tapleys hill road, is that cheap enough? But somehow i dont see someone in a Mazda 3 switching to e85 for the performance benefit, it really isnt a performance car, i mean the thing probably makes 50kw straight out the factory. The only time they will use it in that sort of car is if it came prepared from factory as a Flex fuel vehicle.
The advantages in a high performance car are clear, the cooling benefit, the high octane reading allowing for engines to run leaner without detonation, smoother idle, less break up on top end and then added horsepower increase.