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Old 08-29-2020, 05:17 PM   #1
Dougs 28
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Default Marvel Mystery Oil

Just picked up some Marvel Mystery Oil, have read a lot of talk about it on the barn. Just wanted to know how much to use and how often to use it in the gas tank.
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Old 08-29-2020, 05:28 PM   #2
Werner
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Default Re: Marvel Mystery Oil

I always use it with about 120 cm³ to 40 l tank volume. Highly recommended because hardly any combustion residues remain.
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Old 08-29-2020, 05:31 PM   #3
McMimmcs
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Default Re: Marvel Mystery Oil

I put about 3-4 ounces in each tank full!
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Old 08-29-2020, 06:56 PM   #4
J Franklin
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Default Re: Marvel Mystery Oil

I thought the instructions were on the container.
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Old 08-29-2020, 07:02 PM   #5
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Default Re: Marvel Mystery Oil

I drink it like my vodka...........


ever so carefully. in my chainsaw- mower- cars- cycles.....you name it.
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Old 08-29-2020, 07:15 PM   #6
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Default Re: Marvel Mystery Oil

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We've never seen MMO over here but from what I hear of it on here, I'd certainly like to try it. What is the company that makes/sells/distributes it?
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Old 08-29-2020, 07:26 PM   #7
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Default Re: Marvel Mystery Oil

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Originally Posted by Synchro909 View Post
We've never seen MMO over here but from what I hear of it on here, I'd certainly like to try it. What is the company that makes/sells/distributes it?
Marvel mystery oil company. You can go to their website marvelmysteryoil.com
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Old 08-29-2020, 08:41 PM   #8
Mulletwagon
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Default Re: Marvel Mystery Oil

Four oz. per fill up is pretty typical.
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Old 08-29-2020, 08:49 PM   #9
Purdy Swoft
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Default Re: Marvel Mystery Oil

I've seen it recommended to use four ounces to each ten gallons of gas . Marvel mystery oil is good to prevent sticky valves . I use Marvel mystery oil most of the time .
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Old 08-29-2020, 09:01 PM   #10
marc hildebrant
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Default Re: Marvel Mystery Oil

I use the recommendations on the bottle. The side of the bottle has a handy level scale to help you pour in the correct amount.

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Old 08-29-2020, 09:55 PM   #11
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Default Re: Marvel Mystery Oil

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Originally Posted by Mulletwagon View Post
Four oz. per fill up is pretty typical.

That is what I use. It cured a carburetor “stumble” for my A. I run 6 oz per tank in my 1965 Mustang too.


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Old 08-30-2020, 08:01 AM   #12
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Thumbs up Re: Marvel Mystery Oil

I use to have a vapor lock problem, but not anymore after using MM oil.


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Old 08-30-2020, 08:55 AM   #13
Terry, NJ
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Default Re: Marvel Mystery Oil

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Originally Posted by Synchro909 View Post
We've never seen MMO over here but from what I hear of it on here, I'd certainly like to try it. What is the company that makes/sells/distributes it?
Yawanna start a discussion/argument fast? Start talking about MMO! Half the room thinks it's snake oil and the other half thinks it's Ambrosia for engines. I believe it has its uses. I think it helps as an upper cylinder oil. I do not use it in my crankcase until just before (a day or two) I do an oil change. It messes with the viscosity of your oil. It is basically a solvent, always bear that in mind!
I was buying my tractor, a 1938 allis Chalmers, Mod. B. The engines on these tractors are prone to seizing after sitting for long periods. This one was seized, so I put MMO in each cylinder and let it sit, came back and spun it a few times ("Armstrong starter") and it was OK. I would not like to be without it! But it's not technician in a jar. As I said, it has it's uses! BTW, They've been making the stuff since 1923. I always factor longevity into a product's claims. It can't be all bad!
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Old 08-30-2020, 09:52 AM   #14
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Default Re: Marvel Mystery Oil

I have a '74 ford 1 ton that my son wanted to use. It had been sitting for years. We pulled it out of the shed, drained the old gas and put fresh gas in it and a battery and started it up. Started but ran like crap. Would not run under 1000 RPM at all. Had my son hold it at about 2500 RPM while I poured MMO into the carb. Would pour until the engine would start to slow, then wait for it to "catch it's breath" then pour some more. Used about 250ml (8 oz) and when the smoke cleared (literally) it idled perfectly.
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Old 08-30-2020, 11:17 AM   #15
Dougs 28
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Default Re: Marvel Mystery Oil

Thanks for all the input, much appreciated...!
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Old 08-30-2020, 01:47 PM   #16
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Default Re: Marvel Mystery Oil

Never heard if anyone used to much tho.
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Old 08-30-2020, 02:04 PM   #17
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Default Re: Marvel Mystery Oil

In the A I used to literally go glug, glug, glug, glug when ever I gassed up.
ATF is what some people use also.
Paul in CT
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Old 08-30-2020, 02:14 PM   #18
Tom Endy
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Default Re: Marvel Mystery Oil

A number of years ago a couple club members were on a trip from LA to Las Vegas in their Model A's. They pulled into Barstow almost out of gas. One of them poured MM into the gas tank before he started fueling. When he pulled out onto the highway he went about 100 yards down the road when the engine quit. They fooled with the car for the next 30 minutes until they realized the MM had apparently run directly into the fuel line. Once they drained the carburetor and allowed fuel to get in there the engine started.

Tom Endy
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Old 08-30-2020, 02:21 PM   #19
1928Mik
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Default Re: Marvel Mystery Oil

I do what 1931flamingo does. I use either MMO or SeaFoam, whichever is on sale. The A starts first time every time and seems to idle smoother.. I will attest to having a gas EZ-GO utility cart which runs significantly better using either one, especially in the winter.
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Old 08-30-2020, 04:05 PM   #20
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Default Re: Marvel Mystery Oil

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We've never seen MMO over here but from what I hear of it on here, I'd certainly like to try it. What is the company that makes/sells/distributes it?
I think the Australasian equivalent product is "Moreys Upper Cylinder Lubricant" .
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