What does Marvel Mystery Oil actually do in an E39 (and what are the ingredients)?

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

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Kit Includes (2) 16oz. Bottles of Marvel Mystery Oil additive Cleans and lubricates fuel injectors and carburetors Reduces and prevents varnish and

Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2)

What does Marvel mystery oil do?

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

What is Marvel Mystery Oil?

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Marvel Mm12r Mystery Oil - 16 oz.

How to CHOOSE the right oil for you for your E39