Anyone found a good 2 stroke oil that doesn't smoke excessively? Trying the Amsoil 2000 race oil now ( everyone around here hypes it and sells it ) and not much impressed for the price so far. Mixed it slightly heavier than the recommend 50:1 ( went with 7 oz. to 2 gallons gas instead of 5 oz. to 2 gallons ) and the thing smokes like a steamship. Want to run a full synthetic to keep those valves clean ya know.