Marvel Mystery Oiler

[34pocho]

Has anyone ever hooked up a Marvel Mystery Oiler on a Model A that feeds the cylinders through the manifold vacuum? I seen one for sale on eBay and was curious how it works.

[Werner]

There are two systems to inject MMO. That, what I use sprays the oil into the cylinders when the vakuum pressure under the carbureter ventury is low. That is when the engine is pushed without any drive work.

The other system, unfortunately I don't remember what it's called, injects oil at high power, that's the better way.

[Flathead]

Inverse oiler.

[eagle]

I'm really not sure how injecting MM oil would be more effective than adding it to the fuel. I've seen it on Model As and its a comment item at a car show. Looks kind of vintage and "cool". MM oil in the fuel has advantages for the carb I'd think that a manifold injector would bypass. Just my thoughts. I have experience with MM oil doing good things for small engines.

[mercman from oz]

AMOCO Oiler in Model A Ford

[Werner]

Sponsored Links (Register now to hide all advertisements)

Originally Posted by eagle

I'm really not sure how injecting MM oil would be more effective than adding it to the fuel. I've seen it on Model As and its a comment item at a car show. Looks kind of vintage and "cool". MM oil in the fuel has advantages for the carb I'd think that a manifold injector would bypass. Just my thoughts. I have experience with MM oil doing good things for small engines.

Eagle, what you write is entirely and completely correct! The addition to the fuel has the most efficient effect because the amount of fuel increases with the engine power. (Therefore I add 40 cm³ while taking fuel on the gas station.)

But there is something particularly pleasing to the eye about this old-fashioned MMO metering system, and I think it fits the Model A well. Isn't it?

[eagle]

Originally Posted by Werner

Eagle, what you write is entirely and completely correct! The addition to the fuel has the most efficient effect because the amount of fuel increases with the engine power. (Therefore I add 40 cm³ while taking fuel on the gas station.)

But there is something particularly pleasing to the eye about this old-fashioned MMO metering system, and I think it fits the Model A well. Isn't it?

It does, very cool!

[Patrick L.]

It is a pretty neat looking looking piece. And would be good with ATF for pickling the engine for the off season.

[51504bat]

I had one on the 8ba in my '39 p/u. Problem was that I couldn't get the glass jar to seal. Made several different gaskets but never could stop it from leaking. Ended up taking it off. Its still on the shelf. Maybe this winter I'll give it another try.

[Nosetime]

A real one.

[Werner]

Originally Posted by 51504bat

... Problem was that I couldn't get the glass jar to seal. Made several different gaskets but never could stop it from leaking. ...

Was that rubber seals? In this application, cork gasket is the better way.

MMO contains synthetic ester oil and isoalkanes as well as cycloalkanes. These attack some plastics. Rubber seals swell and then become brittle.

[51504bat]

Tried both. Rubber and cork. Neither would seal completely.

[old ugly]

OK, so i'm old and stupid, but help me understand.
what is the purpose of injecting the "MMO"?
Is it supposed to be injected into the intake manifold while the engine is running?
thanks
ou

[McMimmcs]

It looks weird and looks like it doesn’t belong. I wouldn’t take one as a gift !

[Werner]

Old Ugly,

MMO has two great characteristics. The ester oil is extremely temperature stable and supports the boundary lubrication on the valve stems and also the top dead center piston + cylinder.

The most important benefit is the addition of detergents. These loosen and burn soot and ash in the combustion chambers and on the valve tulips, spark plugs.

Since the old engines always burn a lot of oil and especially simple mineral oils leave behind a lot of residue crust, it is helpful to mix such additives with the gasoline in very small doses.

It also dissolves resin deposits etc. in the fuel tank and the pipes.

[Sunny the Model A]

What a curious idea, sort of like the oil injector on a two stroke saab

[old ugly]

Originally Posted by Werner

Old Ugly,

MMO has two great characteristics. The ester oil is extremely temperature stable and supports the boundary lubrication on the valve stems and also the top dead center piston + cylinder.

The most important benefit is the addition of detergents. These loosen and burn soot and ash in the combustion chambers and on the valve tulips, spark plugs.

Since the old engines always burn a lot of oil and especially simple mineral oils leave behind a lot of residue crust, it is helpful to mix such additives with the gasoline in very small doses.

It also dissolves resin deposits etc. in the fuel tank and the pipes.

i take it that you like and use it?
how much would you dump into a full Model a fuel tank?
ou

[Werner]

Hi Ugly,

use approximately 1:400. That's 3.5 US fl oz on 11 gallons of fuel. Much more is not necessary and also not helpful.

[old ugly]

Originally Posted by Werner

Hi Ugly,

use approximately 1:400. That's 3.5 US fl oz on 11 gallons of fuel. Much more is not necessary and also not helpful.

nice.
do you notice any difference with drivability or engine performance?
engine cleaner inside?

thanks
ou

[Werner]

The performance of the engine and its idling have remained unchanged.

The spark plug inner insulators are much cleaner. If you peer into the combustion chamber through the plug bores, you can see that all the residues gradually diminish over time.

Gerne gemacht!

[roenidoc]

Hello, I would like to have a real Marvel mystery oiler for my Model A. Unfortunately they are hard to find and if, then very expensive.
Yesterday I found an offer for one that is supposed to be for a JUDSON SUPERCHARGER MERCEDES 190SL . In the photo it does not seem special and the box does not say anything about this purpose. Does anyone know if I can use this for the Model A?

[Crankster]

There is a less expensive alternative to the Marvel oilers, the Ampco lubricator. These are NOS, somebody bought a warehouse full of them that were leftover from the '50s or '60s, they aren't reproductions or new manufacture. Maybe that would work for you? They do look kind of interesting.

One thing that's important, the injector tip needs to be through a carb plate just above the intake, basically. Installed at a manifold port some cylinders will be starved while others get too much and plug fouling occurs.

http://ampcolubes.com

[roenidoc]

Hi crankster,
the Marvel oiler operates inverse to vacuum - high vacuum closes the clearance between the needle & seat, and delivers "less oil". When vacuum drops, when under load, the clearance increases delivering more oil.

The Ampco does not have this feature, so when vacuum drops it delivers a bit less oil than when vacuum is high.

So, one can nearly say, the Ampco oiler is nearly only half as effektive as the Marvel Mystery Oiler.

[Crankster]

Well, to be honest, I just pour it in the gas tank and don't worry about it. About 4oz per 10 gallons. It does work to keep valves from sticking &c..

[ETAModel]

Dad used MMO in the 80's to free a locked JD model A tractor. It took about 6 months, but freed a completely stuck motor that had been in a field for 20+ years. I use it in my Farmall 450 and Edgar's 30 Fordor I drive. 4oz to the tank.

Dad used to say MMO would mend anything from a Ferris wheel to a broken heart!

[Werner]

Sponsored Links (Register now to hide all advertisements)

Guten Morgen!

Originally Posted by Crankster

One thing that's important, the injector tip needs to be through a carb plate just above the intake, basically. Installed at a manifold port some cylinders will be starved while others get too much and plug fouling occurs.

This is the case with the Ampco because this dosing device drips oil droples into the intake.
With the Marvel Oiler, this is different because the oil is swirled with air beforehand and oil mist is sprayed into the intake. -


But I would also very much like to know the question answered, whether there are different Marvel Oilers, for suction engines or turbocharged engines?

Asked directly, can the oiler shown in # 21 also be used for a normal A engine without rebuilding the oiler?


Thanks at all in advance!

[Crankster]

Originally Posted by Werner

This is the case with the Ampco because this dosing device drips oil droples into the intake. With the Marvel Oiler, this is different because the oil is swirled with air beforehand and oil mist is sprayed into the intake.

Nein, Macht nicht. Anything introduced or "injected" must have a central point high in the intake so that every cylinder has a roughly equal charge distribution. That's why they use a carburetor spacer or injector plate for the flathead and other engines.

[BillCNC]

I just add 4oz. to the tank when I fill the tank. I also ad 1oz. of Sta-Bil 360 to deal with the Ethanol (California). I have noticed a huge difference in the way the motor runs, smoother, faster, and cooler. I think adding it to the tank also benefits the tank as well. It should stop or slow down any rust that might begin to pop up inside the tank.

Does anyone else use the Sta-Bil 360 product, and if so, what has your experience been with it?

Regards
Bill

[billhoniotes]

My 1927 Willys-Knight has a JAY LUBRICATOR. Are you familiar with it? How does it rate against the Marvel? Thanks

[roenidoc]

I bought and imported an old MMO oiler from the USA and unfortunately found that the brass valve inside was destroyed by corrosion.


Do any of you know someone who restores MMO oilers and who sells spare parts and sometimes has them remanufactured?

I can not do anything at all with this oiler and would be very happy about a helpful hint.

[Tom Endy]

Attached is a Marvel Mystery Oil story

Tom Endy

[Ruth]

Originally Posted by Tom Endy

Attached is a Marvel Mystery Oil story

Tom Endy

Haha, good one Tom.

[katy]

Back in the 1950s-60s there was a product called Red-X which was similar to MMO, Red-x also sold a "upper end lubricator" which was also tied into the intake manifold.

[Werner]

I had received an address for an MMO restorer here in the forum. He sends spare parts. I had positive contact with him, but I can't find the email address anymore.

[roenidoc]

Who can supply spare parts for the MMO oiler?


Need help! I bought and imported an old MMO oiler from the USA recently and unfortunately found that the brass valve inside was destroyed by corrosion.


Do any of you know someone who restores MMO oilers and who sells spare parts and sometimes has them remanufactured?

I can not do anything at all with this oiler and would be very happy about a helpful hint.

[Werner]

Hallo und guten Tag,

my friend means exactly the small valve shown below, which regulates the flow rate of MMO.

The floating steel cone foot was firmly corroded in the brass pan and broke off when I tried to loosen it.

Wanted new or used, dead or alive!

Many thanks in advance for any hint,
Werner