Marvel Mystery Oil?


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Wishoot
December 9, 2009, 01:33 AM
I've been using this stuff in every engine I own for years. That includes cars, snowblowers, lawnmowers, inboards and outboards. I love the stuff in my engines.

I have so much MMO around, I was thinking it may be a decent product to use in place of my beloved Breakfree CLP to clean and lube my firearms. After all, MMO is used to clean and lube fuel injectors or carburetors. Economically speaking, I can get a quart of MMO for much less than a tiny bottle of CLP or almost any other gun cleaner/lube.

So is anyone out there using MMO on their firearms regularly?

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billybobjoe
December 9, 2009, 01:35 AM
For real, MMO is transmission fluid.

Ed Harris
December 9, 2009, 09:25 AM
I have used ATF, sometimes thinned 50-50 with mineral spirits or kerosene, as gun oil for over 40 years.

Also mix the stuff 1:4 ratio by liquid volume with beeswax to use as bullet lube.

Also use to mix with equal parts of K1 kerosene, acetone and mineral spirits to make my own rifle bore cleaner.

Brand doesn't matter as long as it's a known brand from one of the major US refineries, not the no-name recycled stuff from K-Mart or Walmart.

jimmyraythomason
December 9, 2009, 09:39 AM
MMO is a good substitute for hydaulic fluid. It can be used anywhere 10-20 weight oil can.

sheepdog
December 9, 2009, 09:44 AM
...of adding a little to our crankcase is to make the oil flow a little smoother?
...anything else? any additives that would break down the oil...or bluing??? Learning something here this morning, thank you....

jimmyraythomason
December 9, 2009, 09:50 AM
If mixed with the proper weight engine oil in the crankcase,it will keep passages clear of "sludge" and keep hydraulic valve lifters operating properly. I've not used it on guns so I don't know of any adverse effect to bluing.

sheepdog
December 9, 2009, 09:52 AM
...I've used it " ...cause my daddy did..."

Mt Shooter
December 9, 2009, 10:40 AM
If mixed with the proper weight engine oil in the crankcase,it will keep passages clear of "sludge" and keep hydraulic valve lifters operating properly.

Off topic but repeat after me.......OIL CHANGE..............this does more for your engine than any additive will.

Wishoot
December 9, 2009, 10:42 AM
Couldn't agree more. However MMO seems to quiet things down in my engine for some reason. I don't know. It's a mystery to me.

But since this oil has to tolerate such nasty conditions in your engines, why couldn't it be used in your firearms too?

General Geoff
December 9, 2009, 10:45 AM
It can; however MMO does have some mild solvent properties (similar to ATF) and may wreak havoc on very delicate finishes. If your guns are stainless though, by all means go hog-wild. :)

jimmyraythomason
December 9, 2009, 11:08 AM
No argument from me about the oil change (even though most people change their oil TOO frequently). MMO won't do anything better than ATF

jerkface11
December 9, 2009, 11:43 AM
If it's anything like ATF it just has LOTS of detergent added. So yeah it should be fine.

Brian Dale
December 9, 2009, 12:44 PM
I soak old, newly purchased, all steel handguns in Marvel Mystery Oil overnight, then I scrub their interior parts with a toothbrush. The MMO seems to help loosen any old gunk that's present.

I lube with ATF, and I clean bores and revolver cylinders with Ed's Red if the weather is warm enough to work outdoors (acetone). It's great stuff. Thanks, Ed!

{Edited to add: after scrubbing with the toothbrush and cleaning corners with toothpicks and such, I do rinse away all of the MMO with brake cleaner and let that evaporate before lubricating.}

ClayInTX
December 9, 2009, 01:51 PM
Marvel Mystery Oil has been around for decades. Back when rod and ring jobs were between ten to twenty thousand miles we used it with the last oil change just before overhaul to clean up the engine. Of course, the “last” oil change was for a very short time. I never learned what was really in it but always suspected it was part kerosene with oil of wintergreen added to mask the smell.

I haven’t used it for many years because motor oil of today is cleaner, though some still has paraffin but I stay away from those brands. Also, engines no longer need an overhaul every couple of years.

I’ve heard it recommended as an additive to gasoline. I don’t do that because I haven’t seen a need and am certain it lowers the octane rating a bit.

I wouldn’t use it as a lubricant for guns, or for any other similar purpose, because it does contain a solvent of some kind, whatever that might be, and I want oil for lube, not a part solvent mix.

Jolly Rogers
December 9, 2009, 06:46 PM
MMO won't do anything better than ATF
Except smell better...
Joe

FROGO207
December 9, 2009, 07:07 PM
I use MMO mixed with Lucas oil and Mobil 1 - 1/3 of each for an all purpose gun lube for years with no observed damage and it works in cold weather well also.

wishin
December 9, 2009, 07:09 PM
If mixed with the proper weight engine oil in the crankcase,it will keep passages clear of "sludge" and keep hydraulic valve lifters operating properly.

Mixing other types and grades of oil with SAE multi-grade oils commonly used in todays engines alters the properties of the oil. It can also void the warranty should an engine failure result. On older cars, MMO does act as a sludge remover when used judiciously to flush the engine.

jimmyraythomason
December 9, 2009, 07:33 PM
Mixing MMO with engine oil will do no harm to an engine as long as it doesn't get greater than a 4-1 ratio and any engine that would need cleaning out would be long past any warranty. For guns:between MMO and ATF, I would choose ATF for the price.

Pappy109
December 9, 2009, 08:20 PM
I've been using this stuff in every engine I own for years. That includes cars, snowblowers, lawnmowers, inboards and outboards. I love the stuff in my engines.

I have so much MMO around, I was thinking it may be a decent product to use in place of my beloved Breakfree CLP to clean and lube my firearms. After all, MMO is used to clean and lube fuel injectors or carburetors. Economically speaking, I can get a quart of MMO for much less than a tiny bottle of CLP or almost any other gun cleaner/lube.

So is anyone out there using MMO on their firearms regularly?
MMO is not a transmission fluid and it is a great cleaner for Nickle Guns or Guns with Nickle internal parts. It will not attack the copper undercoating needed for Nickle adhesion . I have been using it for 40 years now with no ill side affects.

Pappy109
December 9, 2009, 08:22 PM
Mixing MMO with engine oil will do no harm to an engine as long as it doesn't get greater than a 4-1 ratio and any engine that would need cleaning out would be long past any warranty. For guns:between MMO and ATF, I would choose ATF for the price.
The main ingredient in MMO is kerosene. I like the smell too.

jimmyraythomason
December 9, 2009, 08:36 PM
I see no reason not to use it on guns. Let me clarify,I am not advocating using MMO in an engine as a matter of course but for clean-out only. MMO is used in some small truck manual transmissions and in hydraulic liftgate systems. It does not harm rubber o rings or seals. I would not recommend it in any automatic transmissions however.

theotherwaldo
December 9, 2009, 08:55 PM
I first ran into MMO when I was trying to revive a 21-liter Maybach aviation engine that had spent half-a-century in an old lumber loading dock. My neighbor, a retired aviation welder, suggested MMO for the valves, which were the only parts that were stuck. He said that MMO was originally designed for aircraft engine valves - either straight or mixed with castor oil - back when the valves were lubricated separately from the crankcase.

Well, it worked on this 1917-built engine, it also worked when freeing up the Mercedes truck transmission (chain-drive) that was attached to the engine, and it even worked on the friction-type shocks and other small parts on that old racing machine.

I've never used MMO on a gun, but I bet it would work!

wishin
December 9, 2009, 09:05 PM
MMO changes the viscosity index of a multi-grade oil. Will it ruin an engine at the 4-1 ratio suggested by jimmyray, probably not. Is it necessary in engines, no. Use on guns, I have no earthly idea.

jimmyraythomason
December 9, 2009, 09:21 PM
Composition of Marvel Mystery Oil

I can't garantee that this is accurate.

Ingredient # 01
Ingredient Name BENZENE, 1,2-DICHLORO-
CAS Number 95501
Percent 0
Ingredient # 02
Ingredient Name MINERAL SPIRITS
CAS Number 8052413
Percent 0
Ingredient # 03
Ingredient Name NAPTHENIC HYDROCARBONS
CAS Number 64742525
Percent 0

(copied from a Jaguar website)

billybobjoe
December 9, 2009, 10:40 PM
Well, I'll tell you: I put a little tranny fluid in my air compressor sump so it would run in cold weather. I probably added 20% tranny fluid:80% HD 30 weight. A couple days later the compressor wouldn't keep up with it's normal work and got hot. I had to rebuild the pump after that. I replaced the reed valves and graphite gaskets and it works good now. From now on I'll only put HD 30 in a pump and live with it until it runs enough to warm up when it's cold.

billybobjoe
December 9, 2009, 10:45 PM
I think you would risk wrecking an engine if you added much to your oil. I have added it to Briggs engines to fix sticky valves. I put a little in my gas. After about five minutes of running, problem fixed. Off topic, but most gun guys are also home mechanics.

Oyeboten
December 9, 2009, 11:07 PM
I rebuilt a Chevrolet 216 Engine in 1976 for my then 1946 Chevrolet One Ton Pick-Up Truck...installed a one Quart Marvel Inverse oiler on the Firewall which I'd pulled off a 1937 Packard in a Junkyard.


Anyway, around 290,000 City Miles later, having never done anything more than a couple Valve-adjusts, and reasonably regular Oil Changes ( it had no Oil Filter ) I pulled the Head, and, there was no Cylinder top-ridge.

Originally, MMO was usually for use in Top-Cylinder Oiling, either by adding to one's Gasolene manually, or, via a Vacuum-Drip-Feed-Oiler...and, it works, too.


I've used it on various Hand Guns for ever...probably it is especially good for Autoloaders in cold climes, if the Gun is possibly to be needed 'cold'...as other Oils can be viscous-enough to impeded cycleing.

theotherwaldo
December 10, 2009, 12:37 AM
Hey Oyeboten, my hauling rig when I was hunting vintage tin was a 46 Chevy. It was a 5-ton cabbage hauler, tho, with an International 304, Brownie over-and-under-drive, and a 2-speed rear end. The Cornbinder engine is a straight bolt-in swap for a 216.

Made for a great hunting rig in the Oregon logging country. Vintage tin and venison in the same load.

Mt Shooter
December 10, 2009, 10:57 AM
This one is doomed due to drift, to put it back on track, could MMO be used instead of ATF in Eds red?

Elbert P . Suggins
December 10, 2009, 02:35 PM
I've added MMO to Ed's Red not to replace anything but to make it better. Only without the acetone so I can clean and lube in the house. By the way, I am a firm believer in MMO. Fifteen years ago I bought a 53 Chevy from the original owner and it had 190,000 miles on it and had only a valve grind. He said he was able to get that kind of mileage by using MMO from the start. I started using it after he told me this and I have now 220,000 miles and only use a quart of oil every other gas fill which is around 500 miles. I use it in everything now even the Pratt and Whitney on the Agcat that I fly. I have been able to increase my use of these WW2 piston engines by at least 30%. And at $30000 per engine that is one heck of a savings over 3 years of the life of that overhaul.

Just One Shot
December 10, 2009, 02:57 PM
I haven’t used it for many years because motor oil of today is cleaner, though some still has paraffin but I stay away from those brands. Also, engines no longer need an overhaul every couple of years.
Actually, paraffin based oils haven't been around for quite some time.

Off topic but repeat after me.......OIL CHANGE..............this does more for your engine than any additive will.
True but one of the most overlooked items on an engine that will lead to the formation of sludge is failing to change the PCV valve per manufacturers recomendations.

I had a girl tell me Kendall oil was junk because she was starting to see the begining of sludge build up after 6 weeks on a rebuilt engine.

I went out and looked at her engine and found she had installed 2 breather caps and did away with the PCV system. I instructed her to reinstall it and her problems went away.

Mt Shooter
December 10, 2009, 11:01 PM
True but one of the most overlooked items on an engine that will lead to the formation of sludge is failing to change the PCV valve per manufacturers recomendations.


the positive crankcase ventilator is changed out with the tune as well as the fuel filter....dang it i just did another thread drift.

Bugflipper
December 11, 2009, 08:04 PM
I read a report on lubricity for a penetrating oil. ATF and acetone mixed 50-50 beat out every liquid wrench type product. It is quite cheap to make as well.

woad_yurt
December 12, 2009, 01:11 PM
I feel compelled to add:

I've used Marvel Mystery Oil in my motor oil for at least 30 years. I had a motor with 200,000+ miles with no sludge at all accumulated inside the valve covers, none at all. I had used MMO from the beginning. It's amazing.

Old Ford valve ticks go right away with a pint added to the oil.

For real, MMO is transmission fluid.

I don't think so as it's been sold since 1923. The fluid predated the transmission?

Gun related:

It's a gentle yet capable parts cleaner. It's good for the carbon on a cylinder face. A little soak will get the most stubborn gunk off.

Wishoot
December 12, 2009, 04:45 PM
Gun related:

It's a gentle yet capable parts cleaner. It's good for the carbon on a cylinder face. A little soak will get the most stubborn gunk off.

That's kind of what I thought. I can't imagine MMO would hurt a stainless steel revolver.

theotherwaldo
December 12, 2009, 04:47 PM
-Just keep it off of the wood, plastic, leather, horn, paint, etc.

woad_yurt
December 14, 2009, 09:03 AM
Oh yeah, he's right; take off your grips. It'll darken the wood, but good.

dmaxweb
December 20, 2009, 08:44 AM
I am looking for a Marvel Mystery Inverse Oiler with the glass jar. If anyone has one for sale, shoot me a message.
Thanks

FuzzyBunny
December 20, 2009, 10:15 AM
I only use sperm whale oil to clean my firearms and then oil with bear grease from a bear killed during the week of a full moon.

Just to keep it on topic. Does MMO work better or at all to prevent galling with stainless steel?

Does MMO have any rust protection properties?

On the topic of Eds Red,,,,Love the stuff! Made 2 batches one with and without lanolin. The latter had alot of lanolin and put it on after cleaning to prevent rust. That was over 10 years ago and still have 10 years worth left.

I'm not sure I would use MMO in Eds Red.

rhinoh
December 20, 2009, 06:31 PM
If it's anything like ATF it just has LOTS of detergent added. So yeah it should be fine.

Actually ATFs do not have detergents according to this-

Scroll to the bottom, myth #12, here-

http://www.texlube.com/oilmyths.htm

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