I have used pro long engine treatment and seen all the test done on them very impressive!!!! I was curious what you guys would think of mabe dropping a couple drop or more in the cylinder of your rc its supposed to reduce friction dramaticaly I know it works very good on 1:1 cars and trucks. I once had a 71 Satelite and second gear went out on me I added prolong and drove it like that for almost a year with no more problems, normaly when you loose a gear very shortly after the rest go out and your going no where fast lol so I know its great stuff. Any thought of why you wouldnt want to do this, I can't come up with anything but I'm new to rc motors. I would think it would work good in the tranny also. I keep wanting to combine my hobbies 1:1 cars and Rc lmfao!!!