How much Marvel Mystery Oil per tank?
 

Seems like a lot of people recommend Marvel Mystery Oil but never say at what concentration.
So how much do you use?

Re: How much Marvel Mystery Oil per tank?
 

4oz to ten gallons, more or less

Re: How much Marvel Mystery Oil per tank?
 

I put in 8oz at every fill up, I put in an equal amount into the gas tank also.

Correction: I use a 4 oz. specimen cup, don't know where the 8 oz. came from.
Note: Rinse cup "real good" before re-use :)

Re: How much Marvel Mystery Oil per tank?
 

Keith THAT is funny:) Keeps your valves from sticking!

I got sold on MMO years ago, it does really help with today's dry gasoline. I don't think anything over 4 oz. per ten gallons will hurt a thing.

I buy it in gallon jugs at WalMart, Farm and Fleet, Farm King, whoever has it on sale lasts all season.Good stuff.

Re: How much Marvel Mystery Oil per tank?
 

Snake oil !

Re: How much Marvel Mystery Oil per tank?
 

Its best and highest purpose in my mind is to help prevent valves, lifters, and rings &c. from sticking due to soured or varnished fuel, sludge buildup etc. This is a real problem with collector cars and vintage iron that oftentimes sits for long periods. 4oz. Per 10 gallons in the fuel.

Re: How much Marvel Mystery Oil per tank?
 

I like it for freeing stuck engines. It's a good all around cleaner and lubricant, especially for things that have not been well lubricated and are out in the weather. It's a good upper cyl. lube. I have no problem with adding it to gas. However, I don't think it should be used in the oil, except on the last day or two before an oil change. MMO is basically a solvent for penetrating and cleaning things, not a lubricant. Yeah yeah I know I said it was a good lubricant for rusty stuff, not for engines running at 2500 rpm.
Terry

Re: How much Marvel Mystery Oil per tank?
 

Or just add ATF to the tank in about the same mixture works the same if not better


Sent from my iPhone using Tapatalk

Re: How much Marvel Mystery Oil per tank?
 

1/2 oz per gal or 1 oz per 2 gal- which ever comes out less!

Re: How much Marvel Mystery Oil per tank?
 

Why not just run it on straight MMO? :p

Re: How much Marvel Mystery Oil per tank?
 

two glugs, AS IN GLUG GLUG.....

Re: How much Marvel Mystery Oil per tank?
 

It’s a marvelous mystery how it works.

I know a guy that says it makes him regular so it must be good.

It sure smells good.

Re: How much Marvel Mystery Oil per tank?
 

MMO was developed under contract to GM in the 1920's.

It seems that GM was tired of bad fuels leaving varnish deposits in the carbs, and then the cars being blamed for it. They wanted something that could be added to the fuel to keep the varnish from building up, and it had to burn 'smoke free'. MMO was born.

Later on they found out that MMO had a great side effect; it was very good as an upper cylinder lubricant too. Much later they started recommending that you use it in your engine oil...but its unclear why.

MMO has a unique ability to creep into very small spaces, much like the way Kroil does for penetrating and dissolving rust.

This information was told to me in the pre-internet days by a MMO senior Marketing executive when I was researching inverse oilers.

I use MMO in the fuel, and I've done so for decades. I use the product label as a guide: 4 oz MMO per 10 gallons fuel.

Re: How much Marvel Mystery Oil per tank?
 

The characteristic odor is Wintergreen oil, a very good penetrant. I knew a clock repair guy who used Mobil 1 mixed with MMO "just enough to make it pink" as clock oil. Not a big believer in Mechanic In A Can stuff generally speaking, but for certain applications it definitely has its place.

Re: How much Marvel Mystery Oil per tank?
 

I HAVE BEEN USING MMO SINCE 1960 IN MY OLD FORDS AND SOME OTHER BRANDS ON OCCASION. Works for me never experienced any sticking valves. My friend up the street from me, had a 9n tractor with sticking valves, he towed it to my work shop. After checking it over and finding stuck valves in two cylinders, I applied a liberal amount of MMO in the spark plug holes, put the rest in his gas tank and shortly thereafter the thing ran like it was supposed to. He is now a believer, comes with no draw backs as far as I'm
concerned.

Re: How much Marvel Mystery Oil per tank?
 

We have BIG problems with ethanol in the fuel desolving varnish in the tank and sticking up the valves

MMO or ATF really helps with this

We can not get ethanol free fuel

Chris W.

Re: How much Marvel Mystery Oil per tank?
 

MMO and ATF look the same but are chemically different. How many times has MMO been accused of making a profit by rebottling ATF and adding wintergreen to cover the smell of it? MMO is a solvent while ATF is a lubricant. MMO was developed in 1923, ATF hit the market in 1937 with Buick's automatic Transmission. MMO and ATF will do pretty much the same jobs and about equally well in your upper cylinder. MMO just smells better!
Terry

Re: How much Marvel Mystery Oil per tank?
 

Wintergreen is a component of what makes MMO do what it does, keep in mind it's not used as a perfume, although it has a pleasant odor. ATF isn't designed for use as a fuel additive, maybe it's OK, but then, maybe it isn't.

Re: How much Marvel Mystery Oil per tank?
 

I use MMO in my chainsaw, edger, and weed eater. I’ve never used it in my A.


Sent from my iPhone using Tapatalk

Re: How much Marvel Mystery Oil per tank?
 

Two dollups @ 3 glups/dollup

Re: How much Marvel Mystery Oil per tank?
 

I've eaten mashed potatoes twice a week for 42 years . Never had any sticky valves in my cars. :D ;)


Neither the Marvel Mystery Oil company nor the NTSB that investigated the cause of an airplane crash that they determined was due to the use of MMO, show any Wintergreen Oil in the product...

https://en.wikipedia.org/wiki/Marvel_Mystery_Oil

The Company's 2015 MSDS says it 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%
-Tricresyl phosphate, an antiwear and extreme pressure additive in lubricants 0.1-1.0%
-Ortho Dichlorobenzene, a softening and removing agent for carbon-based contamination on metal surfaces, 0.1-1.0%
-Para Dichlorobenzene, a precursor used in the production of chemically and thermally resistant polymers, <0.1%

According to the NTSB, it is composed of...

74 percent mineral oil, 25 percent stoddard solvent, and 1 percent lard.

If it works for you...great. But you might also try eating mashed potatoes instead. ;)

Re: How much Marvel Mystery Oil per tank?
 

Well strictly speaking, what you say is true, if you want to look at it that way. The facts are though they found several empty gallon cans, the mix ratio must have been off the chart. Everyone always brings up that hoary old chestnut as if it has anything to do with the effectiveness or suitability for use by folks who know what they are doing. Its use for freeing or preventing sticky lifters, valves, rings is long known. MSDS isn't always complete btw, especially with proprietary information.

Re: How much Marvel Mystery Oil per tank?
 

From what I've heard about it, the FAA and the NTSB will automatically blame anything not "Stock" on a plane as the culprit in a crash if the pilot lives. If he dies, then it's "pilot error" or worse.
Terry

Re: How much Marvel Mystery Oil per tank?
 

https://www.ntsb.gov/_layouts/ntsb.a...02LA181&akey=1

One empty gallon jug of MMO was found. The operator stated that they were adding one quart per fill up of a tank (18 gallon tanks). More than we would generally use, however.

Re: How much Marvel Mystery Oil per tank?
 

4 oz in a tank!?!?! Give me a % so I can work it out. You guys use something other than what we used to use as a gallon, yet call it a gallon and how much is an ounce? An ounce was always a measure of weight, not volume.
Puzzled.:confused:

Re: How much Marvel Mystery Oil per tank?
 

I just follow the printed instructions on the container. It always reminds me of the leeeetle smoke capsules I put in my American Flyer electric train back in the 50's. LOL

Re: How much Marvel Mystery Oil per tank?
 

4 fl. Oz per 10 gallons. A "Gill" may be what you're familiar with. Just give it a couple glugs every time you fill up. ;)

Re: How much Marvel Mystery Oil per tank?
 

...and the MMO container is marked/embossed in fl oz, so you can double check your glug glug :D

Re: How much Marvel Mystery Oil per tank?
 

For you naysayers———- when my engine was first built, it had a ticking noise. Probably a sticky lifter?? The man that built it told me to put mmo in the gas. The noise went away. A tank or so later, I left the mmo out. The noise came back. Put mmo back in, and the noise went away again. Been using it for 35,000 miles.
Also, believe it or not I’ve never had a no start, and I pretty sure it’s because of how I hold my mouth while stepping on the starter button.

Re: How much Marvel Mystery Oil per tank?
 

Nope, a "Gill is new to me. I've just done a little research. I US gallon is 128 fluid ounces (weird number!) so a fill of say, 10 gallons is 1280 ounces. 4 ounces in that is 0.31%. That would be about 125 ml. Wow, that is pretty low!

Re: How much Marvel Mystery Oil per tank?
 

I'd caution against using too much in the fuel, the intake valve and bowl isn't subject to the cleaning effect of heat the exhaust side has, any oil deposited in this area doesn't wash, it combines with carbon to make a tar-like substance.This is prevalent in an engine I'm doing now,a gummy build up in the intake bowl and back of intake valve,way more than there should be with a low mileage engine this is..

Re: How much Marvel Mystery Oil per tank?
 

I have used MMO and don't believe it does harm when used as directed and may do some good.

I've always wondered, however, how it can help lubricate the exhaust valve stem and guide (when used in the fuel). I can see that when it is drawn past the intake valve that it could coat part of the stem and help lube it. On the exhaust side, however, it is burned up by combustion before the exhaust valve opens.

Ideas?

Re: How much Marvel Mystery Oil per tank?
 

How does MMO in the fuel get to the lifters?

Re: How much Marvel Mystery Oil per tank?
 

Some of the oil in the upper rocker area (OHV anyway) manages to lubricate valve stems, MMO is made to be used in both the crankcase and fuel, they recomend replacing 1 quart of motor oil with 1 quart of theirs.

Re: How much Marvel Mystery Oil per tank?
 

Soot quality of the exhaust aides in exhaust valve lubrication. late model engines from the 70's used mechanical and vacuum advance to reduce emissions,and basically shortened valve life by providing a cleaner burn which reduced soot and deposits ultimately reducing particulate emissions ...old Volkswagen trick to extend head life is to run an early mechanical advance distributor on a later engine,it didn't keep the advance pegged during decel,allowing the soot to build and ultimately a cooler valve..with the model a engine having a potential issue with exhaust valve burning the MMO,if it cools the fuel burn rate and leaves a deposit,could help.

Re: How much Marvel Mystery Oil per tank?
 

A little over 30,000 gallons to fill the tank.
https://i.ebayimg.com/images/g/ImQAA...M7O/s-l300.jpg
However, even empty, with a tank tare of 65,000 lbs this rig is probably already overloaded. :rolleyes:

Re: How much Marvel Mystery Oil per tank?
 

Silly...this is a rail car mover..

http://i65.tinypic.com/dpcuc7.jpg

Re: How much Marvel Mystery Oil per tank?
 

started using mmo. I now have very faint oil residue at base of plugs

Re: How much Marvel Mystery Oil per tank?
 

Ounce markings are on the side of the U S sold bottles. I'd expect similar markings for other countries.

Re: How much Marvel Mystery Oil per tank?
 

Just use a mouthful mate.
See my earlier post