I own several cars, chainsaws, generators, diggers, industrial engines, lawn movers and have a collection of model steam engines. In all my years of 'playing' with engines, i've never even heard of after run oil..! Now i'm long enough in the tooth not to snub at new knowledge or education, but only a few days ago I picked up my Savage and my first ever Nitro engine. Can someone please explain to me After Run Oil, What makes a Nitro need it? Over and above any other two stroke, or any other engine. Or is it Snake oil designed only to lubricate the cash out from my wallet??