the engine i have in my trainer is an ASP .40. and jp, you are correct, i went to the LHS, told them what engine i had, he came back with the fuel  i ended up getting.   i just have a mess of oil comming out of my exhaust, and i keep leaning back. im sure the engine is in the ballpark on tuning, but i guess my question is, once im sure i tune it correctly, can i get fuel with a little less oil in it so i dont have so much oil to clean every time i run the engine?