marvel mystery oil

[1952henry]

Thanks. The one on the left is NOS to my knowledge, but the die cast top was in bad shape finish wise. I cleaned, prepped and rechromated it to new. Now just need to get my two old vehicles restored so I can put them to use.

[Kirby1374]

I have an 85 chevy truck with a 454. I've had it 7 years, always had a slight valve/lifter tick. I put a heavy dose in both fuel tanks and some in the oil and pulled our fifth wheel trailer camping up several hills in the heat.
The tick is now gone, pinging under load has subsided and the occasional dieseling after turning it off has quit. So, it cleaned up the carbon and loosened/lubricated the valves and lifters. I think that that is a good thing!

[California Charlie]

Originally Posted by steve s

Sorry to interject a downer into your success, but white smoke usually means antifreeze in the combustion chamber, which would also explain why pistons were frozen. Maybe a cracked head or leaking gasket? Any kind of lubricant or penetrant would have helped free things up.

No downer Steve. I've been driving around town today with no hint of white smoke indicating a cracked block or leaking head gasket. No overheating nor evidence of oil in my radiator water etc. So far so good. CC

[steve s]

Originally Posted by California Charlie

No downer Steve. I've been driving around town today with no hint of white smoke indicating a cracked block or leaking head gasket. No overheating nor evidence of oil in my radiator water etc. So far so good. CC

Good news! But, to be sure, pay close attention for the first several seconds after starting up after it has sat for a while.

Steve

[Fred K-OR]

Wow, I am confused. Yes I too have had the pleasure of having a case of Vapor Lock (I think). My first with either of the cars. After reading all the posts on VL I am confused as to what I experienced today on our 10 mile drive. After about 6 or 7 miles the old coupe quit on us. Pulled over to the side of the road and let it sit for awhile. Temps were in the high 70's. After a short pause, tried to start it, started fine and ran another mile or so before the next shutdown. Same thing happened for the next few miles over and over again. Went into the local store (when we finally got there) and purchased a crescent wrench (never leave home without your tool box) to take the gas line off. Drained the line and tried it again. This helped for the next two or so shutdowns but we did get home without a toe. Wheeee! So I don't know what happened but it sure seemed like vapor lock to me (if there is such a thing).

P.S. I painted my carb black. Maybe I should have painted it silver to shed the heat!

[J Franklin]

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I've run my car across the Mojave desert mid summer had a boil over due to a loose (bad) fan-belt. Helped a modern car that had overheated with my desert waterbag. I have never once had vapor-lock since first started driving this car in 1966.

[California Charlie]

Originally Posted by steve s

Good news! But, to be sure, pay close attention for the first several seconds after starting up after it has sat for a while.

Steve

I'll keep an eye on things as you suggest and hopefully things will continue to be as they currently appear to be normal operating conditions. I do appreciate your input and suggested help.

[JBohannon]

I could not fine MMO so I bought seafoam. Would anyone like to compare the two.

[kingbee]

Fred K, your problem sounds more like the gas cap vent is partially blocked.
Next time I happens ,loosen the cap and listen carefully for a little whoosh.
Even if you don't hear it, if the car starts right back up, it's the gas cap.


JB, there is no comparison, as sea foam is a carb cleaner, while MMO is more of a lubricant.

[HoarseWhisperer]

Sea Foam

Pale Oil
Naphtha
Isopropyl Alcohol
Carbon dioxide

Marvel Mystery Oil

Benzene
MINERAL SPIRITS
NAPTHENIC HYDROCARBONS

You have to ask, is it a good idea to put more alcohol into today's fuel that already has "more alcohol"?

[steve s]

Originally Posted by kingbee

Does anyone know if adding an electric fuel pump would help with the VL problem?

If you can find a cool place to put it; otherwise, it's just one more place for bubbles to jam up. Modern cars have them inside the fuel tank. In my car, I've watched the fuel start to vaporize as soon as it enters the sediment bowl.

I recall spending time sweltering along the road as we applied wet rags to cool the electric fuel pump my brother in law had added to his '58 Ford fliptop.

Steve

[Fred K-OR]

Thanks Kingbee. Will give it a try next time. I did take a look at the gas cap tonight and it looked like if was OK. But it is an aftermarket one so it could still have a problem.

[Duffy1]

Steve ;

Thanks

[PetesPonies]

The tick is now gone, pinging under load has subsided and the occasional dieseling after turning it off has quit. So, it cleaned up the carbon and loosened/lubricated the valves and lifters. I think that that is a good thing!

its a good detergent . . some ATF would do the same thing.

[Cory Moffat]

Well I bought myself a gallon of Mmo today. My new thing to do every fill. However am a little leary about thinning the oil with it.

[trulyvintage]

As is the case sometimes, a Thread takes on a flavor of its' own ..

Sure is a lot of good advice here on the Barn ....




JIm

[duffer]

Got my bottle first of Mmo today...smells yummy..Saw Sea foam on shelf too. Not to keen about putting something called "sea foam " in my gas. Just doesn't seem right.

[BILL WILLIAMSON]

Originally Posted by Fred K-OR

Thanks Kingbee. Will give it a try next time. I did take a look at the gas cap tonight and it looked like if was OK. But it is an aftermarket one so it could still have a problem.

Fred,
Not for your car, But I've read that on '30-'31 caps, sometimes gasket moves & blocks vent hole. Idea! drill 1/16" hole up through center cap rivet, up to, but not THROUGH the top shell of the cap. Also, when purchasing 1/16" drill bits, buy 6 at a time & when buying any toilet repair parts, buy 2. Bill W.

[Special Coupe Frank]

Originally Posted by 1952henry

Some of the various units produced to introduce it to the manifold. Three of those pictured are NOS as is a Shaler (similiar to the Allstate) that is not pictured.

Love this stuff, especially the "Motor Rhythm" unit on the right, using a Ball "Lightning" canning jar !

I think MMO still advertises their "Marvel Inverse Oiler" for automatic dispensation of their product.

[BILL WILLIAMSON]

If MMO still sells their Inverse Oiler, they had better speed up their production line! Bill W.