He (Willie) considers minimum break in 1 gallon of fuel thru the engine on the bench, NOT SYNTHETIC! Don't run castor oil in a Saito, but for break in you want something a little less "slippery" than synthetic. Helps the engine's moving parts seat in better. Dont't exceed 4k rpm for the first 1/2 gallon or so, just keep it ticking along. Personally, I don't consider a Saito really broken in untill it has at least two gallons thru it, then I'll start leaning it out and really looking for peak performance. Adjust the valves after your first gallon of fuel, before you mount the engine on the airplane. If you need help I'll be out at Fentress this weekend.


Now I am confused. If it's not synthetic oil and it's not castor oil, then what is it? I am new at r/c and I have only heared of those two types of oils.