I ran across this excellent video about Marvel Mystery Oil. He goes in detail on his experiences, and advice, on using MMO.
It's funny, he says "Snake Oil" early on , then mentions Berryman's B12 fuel system cleaner soon after. Those of you familiar, know of Ron Hatton's protocol of using Berryman's B12 as a crankcase cleaner.
This guy is saying almost exactly what I've been advising folks for quite a while about good old Marvel Mystery Oil.
Of course, he does not know about 100%Pure Snake Oil! LOL!! only the inferior kinds!
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Gadgetman Reno, NV