I have had excellent results using RC Car Fuel. I buy the 30% Nitro, 14% Oil version, then add "10% by Volume" Castor Oil. Remove 12.8 OZ. of fuel, then add back 12.8 OZ of Benoil or other Castor Oil. Mix well and you will have about 27% Nitro and 24% oil of which 10% is Castor. My TD 0.10, 0.20, and 0.49's run very well on this fuel.

Ralph