I have seen a lot of 2 cycle engine pistons after being run to the max extreme. My cousin Wyane Koomen from Casnovia Mich held the Worlds fastest snowmobile drag races for ten years strait. His boys drove, but Wayne did all the porting, flow testing, dyno testing and designed the tunned pipes the engines used. Wayne always used Klotz and the pistons and inside of the engines remained super clean. I stared using Klotz also in my snow sleds and then started mixing my own RC fuel years ago. I would not do the 100-1 in any RC engine, knowing there is a better oil. The only thing that I know that happened on my Cousin,s engines is a piston would burn a hole through the top from running to lean. Racing does that! Thanks Capt,n