In that case, what have you been running fuel wise? I would think the lower nitro fuels will reduce overall stress on the engine. Norvel agrees. The purpose of higher nitro is to improve the engine's handeling. It seems great with the 10%, so it seems like a win-win. I am a firm believer in a some castor oil for the smaller motors. Its a mess maybe, but hard to beat lubrication wise. Omega is a Norvel reccomended fuel.

Kristopher