I was talkin to a guy today at my local mud bog deal and he said that you can put 4 ounces of Acetone to every 10 gallon of gas and it significantly increases your mileage.... I did it to mine today and with just today's ridin around I have averaged 4mpg increase!! I am just testing it out! Its not suppost to hurt anything...Basicly its just souped up alcohol! I am gunna test it out and see how much MPG increase I get!