LOL, well I did notice a difference in how it ran, but admit that is not reason enough to continue use. As a matter of fact, I've never run it in another engine...not due to poor results, but I'm just not convinced.

I'm pretty much in the same vein as you, Orc, which is that the benefit is more of a placebo effect, and why take a chance on gumming up a good engine, when all you really need to do is change oil frequently.

Who knows, though, maybe someone out here can shine some light for us.