I was about to suggest odonnells, sometimes tower runs specials like 4 1 quarts bottles for like 25 bucks or something, like that, I personally have purchased duratrax Red Alert 20 percent because thats what they suggested w/ my ODST, so I got it. I also have Traxxas Top Fuel, But I was going to purchase the O Donnells 20 percent in the near future.