Originally Posted by
Bundy_Bear
Why fuel? The main ingredients in any R/C nitro fuel we use in our models is hygroscopic which attracts moisture in your nitro engines causing rust when left sitting.
I pull down and flush my engine out after every race meet with brake cleaner and rebuild with after run oil for the last few years no problem.

Different philosophy I guess, I clean out with brake cleaner and oil with Novarossi rebuild oil after a wet race, but after a dry day I just leave the engine alone because quality fuel oils the engine and doesn't require after run.