Mistral,

I am using CoolPower 10% from Morgan Fuels. It contains synthetic oil only. (RCV has recently begun recommending a fuel with synthetic oil only.) I get it at my local hobby store. I works well, but I will switch to CoolPower 15% for a little more power. Josh uses it and he has much experience with these engines. Bill at BJ's Model Engines gave me a few pointers on these engines a well. Per his tests, the SPs run a little cooler on the fuels with more nitro. I used a Master Airscrew Classic 18x12 for break-in.

You can find pics of my plane in the thread "TF GE Corsair -w- 1/8 Scale Hamilton Standard Hub." Post some pics of your plane. I would love to see it.