Ok, I am not talking about putting this in a bike, but what about E85 for flex fuel vehicles? I know many of us have them, and according to recent studies, there are half as many E85 stations as there is electric charging stations. My car requires per the manual 91 octane or E85. In the interest of saving money, I have started using 89 octane and with the last three tanks noticed no difference in performance or fuel economy. There is one location in my town that has E85 and it is ten cents cheaper than regular unleaded. I am scared to try it. Does anyone use E85 and what are the effects? Mileage, performance, etc?