Marvel Mystery Oil - Silly Old School Snake Oil, Or Can This Stuff Actually Work 

It's the original "Mechanic In A Can" and for the last hundred years, the real mystery has been what's in this stuff and can it actually do any of the things it claims to do?
Here's a quick look at it's history, intended original use, what was discovered during a NTSB plane crash investigation, and how in certain circumstances it can actually live up to SOME of the claims it makes on the label.
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