RE: After run oil
its all good bro, i use it at the end of every running day, better safe than sorry for me. Nitro fuel attracts moisture thats why you should drain all the fuel from the tank, lines and engine (by running it dry) and giving a coat of oil on the engine parts to keep the rust away. You only need a couple of drops in the carb and engine (plug hole)..... My engines always start on a couple of pulls, even when they sit for years, i am always amazed by that too.... I have engines that are 30 years old, some older plane engines and all look nice inside and run great.