I still cannot understand this castor vs. synt lube issue. I have been running all my engines from TT46 to Saitos to YS on Cool Power only. They are all doing well, still getting the RPMs out of them. Why do you need castor in case the engine gets hot? Why not learn to tune the engine so it does not overheat? I believe this is not a difficult thing to learn, ain't rocket science for sure. I am not against castor, as a lube it burns at a much higher temp than synth lube but if we keep the engine at the appropriate temp then there is no issue right? After each flight I will check the temp of my engine.

The only reason I do not use castor is because I am too lazy ... I dislike the grime on the plane.