Talk to the people that build racing rotary engines like SDJ. The dyno has shown that synthetics do not transfer as much heat as a good normal oil. It is the same reason to run water and an additive in your radiator and not 50/50 water and antifreeze. As I said synthetics can take the heat but there is no point since our engines are junk at 260 degrees oil temp anyway. If you are still using the oil injectors and not premixing definitely do not use synthetic oil.