I mix my own fuel and use 10% nitro, 18% coolpower. I use that in 2 and 4 strokes, OS, Saito and ASP. They all seem to run well on that combination for me.

Also consider your approach for after run oil. Myself, I squirt a generous dose of WD40 in the cylinder (remove the plug first) and then turn the motor over a few times to be sure it gets into the crankcase. (I suspect this will start a whole additional debate).

My oldest motor is 3 years old and has had about 150 flights with no bearing problems. They start easy and run well.