scott, we just got some of that exact shit for our last hillclimb in minnesota last month. it will make a big difference. i didnt notice any that i needed to bump up jetting tho. i checked my plugs and they looked pretty good so i left them. to my understanding running the oxygenated is like running part nitro methane. i do know that shit has a very distinct smell and thats what almost everyone at our hillclimbs run.