I found a Clark station not far from me that sells ALL its "preimuim" Gas as non enthol, I filled up may tank and drove my "normal" 120 miles before filling up again. I filled to the rim and it took 2.596 gal. I normally need 3 gal, so it would appear I got a bit better mileage. As far as more power? well I did eat a GSX 1100 for lunch in a 40mph roll on (from 40 mph) but I would do that if I was running on E85. Guys that ride crouch rockets should learn their bikes strengths. A top gear roll on against a V-max is not going to be a winning deal. (if we had gone in 3rd, he most likely would have dusted me)