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post #1 of 9 Old 01-31-2015, 05:20 PM Thread Starter
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Marvel Mystery Oil, and it's best uses?

I have a Bolens 1254 that I bought at auction that was sitting for 5 years. The oil is surprisingly clean, and also full. It seems to have tons of compression, but I don't have a tester. I have heard miracle stories about MMO and how it frees up rings and is a very good additive and such. Anyone have good experience with it? I'm thinking on using in the oil AND putting some down the plug hole to free up rings.



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post #2 of 9 Old 01-31-2015, 05:48 PM
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Re: Marvel Mystery Oil, and it's best uses?

It's primary use from what I've read is as a penetrating oil, and freeing stuck engines. It's also supposed to be a good fuel injector cleaner.

I'd shoot some down the plug hole, it will add some lubrication and free up some stuck carbon.

If the oil is clean there's probably no need to put any in the crankcase.

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post #3 of 9 Old 01-31-2015, 08:16 PM
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Re: Marvel Mystery Oil, and it's best uses?

Probably be good to pour a tablespoon of it down each plug hole and roll it over a bit. Make sure to wrap a piece of bare wire around the metal part or otherwise ground the plugs when you.re pullin it though if you cant kill the ignition with a switch and still roll it over. Leaving some in there over night before doing that is a nice touch but from your description probably not necessary.
You do want to ditch that oil in there though. Who knows what's in there? Fill that puppy with some nice fresh High test or ethanol free gas if you can find it and you're home free unless the carb is sticky.
MMO is great stuff that took care of the problems with early oils but isn't much needed today. It is a good fuel system cleaner as well can be added to motor oils to cut down on valve deposits sticky valves and such. It's also a darn good penetrating oil and guys swear by it as air gun oil. A quart will last for a long time. If you spill any on your paint wipe it off. I've seen it loosen enamel paint before if left in a puddle.
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post #4 of 9 Old 01-31-2015, 08:20 PM
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Re: Marvel Mystery Oil, and it's best uses?

I agree that you should dump the old oil.. You might just find a little bit of crystal clear rain water hiding underneath it.

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post #5 of 9 Old 02-11-2015, 06:14 PM
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Re: Marvel Mystery Oil, and it's best uses?

I add a few drops of Marvel Mystery Oil to my gas when I fill up and oil when I do an oil change.
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post #6 of 9 Old 02-11-2015, 08:28 PM
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Re: Marvel Mystery Oil, and it's best uses?

MMO has had a place in my shop for years. It's an excellent penetrating oil but slow acting. I've typically used it as a fuel additive to top lubricate engines. With the new fuels it seems to work well to prevent valve seats from being pounded down due to the lack of lead in the fuel.

MMO air tool oil is the only lubricant I'll use in my air tools. Been using it ever since I found out it was available. Prior to that I used the standard MMO. The air tool oil has a few properties that help dispel moisture from the tool.

I've also used MMO as an oil additive but have pretty much quit doing this as the newer oils are so good it's generally not needed. The old paraffin and non-detergent oils really needed the boost that MMO offered.

Your engine, having sat so long, may show clean oil but I'd change it anyway. As was posted it may have water laying in the bottom of the sump and/or the dirt and crud may have settled out while the engine was not being used. Really depends on the quality of the oil that is in the engine.

You mention the engine has good compression. I would think this would indicate the rings are not stuck. I'd still pour a couple tablespoons of MMO in the cylinder and spin the crank several times. A little extra lubrication on startup sure won't hurt it any.

If you decide to use MMO over a long period of time be aware it's available in gallon, five gallon and 50 gallon sizes. Cost per gallon goes way down over the little consumer cans most parts stores sell.

Aside from being an excellent lubricant and additive it, to me at least, has a really nice aroma.

Mike

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post #7 of 9 Old 02-11-2015, 11:12 PM Thread Starter
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Re: Marvel Mystery Oil, and it's best uses?

Quote:
Originally Posted by Tencubed View Post
Aside from being an excellent lubricant and additive it, to me at least, has a really nice aroma.
So, that means that it's the ultimate guy's bottle of magic! Like WD-40 on steroids, right? It's a penetrating oil, fuel additive, oil additive, air tool lube, and, since you say it has a nice aroma, could be used as a man's shampoo and deodorant

Who knows, maybe it would be good in corn flakes too

I'm sold

Thanks guys!

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1971 Bolens 1254 w/ tiller, deck, blower, blade, sleeve hitch, 2 Brinly plows
https://www.mytractorforum.com/18-bol...254-going.html

1983 Snapper LT12
https://www.mytractorforum.com/15-sna...ml#post7673977

1987 Snapper LT16 w/ mower deck and snow blower
1997? Murray Ultra w/ mower deck and snow blower
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post #8 of 9 Old 02-12-2015, 12:01 PM
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Re: Marvel Mystery Oil, and it's best uses?

I use it as an upper cylinder lube and gentle fuel system cleaner. I mix it at recommended levels in all my gas. And I'll be the odd man out and say I don't really like the smell. But I tolerate it.

I've been reluctant to use it in oil. Oil is so good now, I'm of the opinion that anything I add to it likely just degrades the performance. Opinions may vary....
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post #9 of 9 Old 06-24-2015, 12:47 PM
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Re: Marvel Mystery Oil, and it's best uses?

I don't use MMO. No justified purpose for it.

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