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marvelle mystery oil

Old 03-20-2018, 03:27 PM
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Default marvelle mystery oil

whats the deal with this stuff. is it snake oil or what? if you have a 4 stroke do you add it to fuel? what about an e-tec . whats the word on this stuff
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Old 03-20-2018, 03:31 PM
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It's a very old product that's been around forever. I do not know if they have reformulated over time. Looks like transmission oil and is intended to be an upper cylinder lubricant. I used it in the 70's and did help valves last longer and kept piston surfaces clean.

What are you trying to achieve?
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Old 03-20-2018, 04:25 PM
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In shop we were told that it is pretty much automatic trans fluid... I don't know...
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Old 03-20-2018, 04:27 PM
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Used it in the crankcase to clean noisy lifters. Worked sometimes. As did dexron, varsol, kerosene, and risolone. Personally I wouldn't use it in outboards unless it's a last ditch effort to decarbonize to prevent a tear down.
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Old 03-20-2018, 04:29 PM
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I swear by it.

You don't need a lot but old cars stored, race cars, and my boat all get treated to it. A little bit in the fuel if your are laying up anything really saves wear on the re start.

I believe it makes a difference and I use it in all the above.
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Old 03-20-2018, 04:33 PM
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Snake oil, but whatever makes you feel good I guess. Like penetrating oil, I've never seen
any of it penetrate down through the threads but people swear by it.
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Old 03-20-2018, 04:37 PM
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The vast majority of MMO is trans fluid. Rest are solvents and additives. It's been around for decades, many truly old school mechanics either love it or cuss it like their mother-in-law. It does work for some situations, I'd say it likely won't really hurt anything unless you poured in way to much, in which case anything else would likewise have been to much.
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Old 03-20-2018, 05:02 PM
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Marvel Mystery Oil has been around since 1922. The automatic transmission, using oil, was invented in the early 1930s. This invention was sold to GM and introduced to the general public in the 1940 Oldsmobile.
Kind of reminds you of what came first, the chicken or the egg.
It seems any discussion of oil can always start an argument.
I am out of here..
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Old 03-20-2018, 05:11 PM
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MMO has its place. It's not a miracle cure but it's not snake oil either. This product has been beat to death over debates. I'd Google it and make my own conclusion.
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Old 03-20-2018, 05:23 PM
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Originally Posted by sjef View Post
Snake oil, but whatever makes you feel good I guess. Like penetrating oil, I've never seen
any of it penetrate down through the threads but people swear by it.
MMO is great for fogging engines during layup.

As for penetrating oil, try Kano Aero-Kroil. Was introduced to it in the military during the early 90s, it's frigging amazing on frozen bolts, etc. It's like WD on steroids.
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Old 03-20-2018, 05:26 PM
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According to the company's 2015 safety data sheet Marvel Mystery Oil is composed of:
Petroleum Distillates (Hydrotreated Heavy Naphthenic) also known as mineral oil, 60-100%
Petroleum Distillates (Stoddard Solvent) also known as white spirit, 10-30%
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Old 03-20-2018, 05:27 PM
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Originally Posted by Iknownothing View Post
MMO is great for fogging engines during layup.

As for penetrating oil, try Kano Aero-Kroil. Was introduced to it in the military during the early 90s, it's frigging amazing on frozen bolts, etc. It's like WD on steroids.
There is nothing on this planet better than Kroil for freeing fasteners. We used MMO as a fogging oil many yrs. ago.
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Old 03-20-2018, 05:35 PM
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Don' tuse too much....https://www.facebook.com/lavon.d.mil...4381586342168/
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