Yes, I know that oil, actually have it at home as it is the one I use for my cars, Castrol Edge.

But the pump not lasting 50 flights is very strange, never had that issue, but I always run my engines rich, never lean, and only use CoolPower, Cosmo is better but can't get it, I got 100 RPM more o Cosmo without touching the settings on the engine, but, still, CoolPower to me is the best you can get on the US. What did you use for fuel?

Regards

Alejandro