I've tested quite a few fuels and found that Werks 30% fuel seems to get me the best run times so far. I'm sure others will say something else is the best. Also wheel spin is the biggest waist of fuel! Drake gets those 11+min run times by making it a point to reduce wheel spin everywhere he can. I race against Drake often and have been trying to learn from him and other pro's how the fuel game goes. Its all about reducing wheel spin, restrictors, and the right plug for the atmospheric conditions.