Today I picked up a 5 gallon pail of Sunoco fuel that I will use to break in the engine. It is their Optima unleaded blend that is 95 octane (98 RON) and contains no ethanol. It is very expensive especially with the overall increase in fuel costs these days. But, it is pretty much impossible to find a gas station with gas that doesn't have ethanol here in California. Once I'm actually flying, I'll have to find a less costly alternative. I also bought some Amsoil synthetic 2-stroke oil.