Marvel Mystery Oil

[JCM 9,130]

I remember when I was around 7 years of age when my Dad thought it was about time I learned how to change the oil,filter and grease an automobile,this was in the Mid 60's.There was always a metal can of Mystery oil on his workbench that he would use to add a small amount to the crankcase and also in the gas tank. I also remember sniffing the oil can and thinking how much better it smelled than Gear oil. In the trunk of his car he also had a heavy duty cardboard box that contained almost everything he would need in case of a breakdown on the road even though he always had nice vehicles, but being a Heavy Equipment Operator he was prepared for the worst. In that box there was everything from Fan Belts to Tire chains even though he ran Studded Snow Tires and of course a small can of Mystery Oil. Are there any other true believers of this magical oil or is it something he really didn't need to add in at oil change time? Interested to hear the comments on this one.      Thanks Guy's

[Super-C 4 me 612]

I use it all the time.

A lot of people like PB Blaster, or Kroil.

I like Mystery oil.

probably doesn't work as fast but I oil it up, go back in a day or 2 and things seem to spin easier.

I've noticed a lot less broken bolts

 

B

[857 horse 2,581]

Now,,,,things they dont carry anymore.......jumper cables.......2 bags of sand,,,,,,and a fox hole shovel,,,,,((you know what im trying to say ))

 

having any of that means posssibly helping someone.....today help is a cell ph and triple AAA

 

shame on us

 

Edited August 6, 2019 by 857 horse

[953 nut 55,077]

I have a tool kit in my wife's car with Jumper cables, tow rope, 12 volt compressor and an assortment of tools. She doesn't know how to use any of them and probably won;t ever come to the rescue of a stranded motorist, but if she needs help she can furnish the tools!

1 hour ago, JCM said:

Are there any other true believers of this magical oil

In the 70s I used MMO to free up an engine that had been sitting for about a dozen years. It was a '47 Dodge flathead six that wouldn't budge. Put a bit of MMO in each cylinder and let it sit for a few days, towed it and popped the clutch a couple times and it turned freely.     Would regular oil have done the same thing, I have no idea.

I do think that lubrication technology has come a long way since the '70s and I don't use any additives in my oil now.

[Stepney 2,325]

I run a little in all my engines' fuel. However I rarely use it in the crankcase. A believer in Valvoline High Zinc VR1 yself and use it in basically everything.
I usually will use a mix of 50% acetone, 25% atf, and 25% MMO as a penetrating agent. Freed up many an engine like that. 

[WHX?? 48,780]

I'm on the fence JC. Never did believe in "tune up in a can" as a quick fix for a re-ring or some valve guides. I do have bottle of MMO on a shelf but would trade it for a can of seafoam as I can actually say I have seen that stuff make an vintage Briggs run better. 'Course the fresh gas may have helped that!  

On the other hand I might follow dad... he's  older and alot wiser! 

[Sparky-(Admin) 21,302]

  Interesting subject. I have a bottle of Marvel on my shelf, been there for years, but have no idea what I should or shouldn’t do with it.

  @peter lena , you must have some info on Marvel Mystery Oil. Care to share?

[diesel cowboy 263]

I keep a bottle of it at work and pour a little in the gas every winter along with some Sta-Bil and Start! your engine before I put them away for the winter.  Seems to keep the jelly buildup in the carbs down to almost nothing for around 4-5 years before I have to open them up to clean it out.  I also put some in the tank and crankcase on some of the old farm tractors that have been sitting for a while if they skip and pop once I get them going.  Most of the time it cleans the gum off the valves and they run fine afterwards.  Just did that a couple weeks ago on my 9N along with putting some lead additive in the gas and it's running like a champ now

[Darb1964 1,042]

I use mmo in all my small engine's with every fill up.I put a small amount in the oil between oil change also. I love the stuff,I think it keeps all internals clean and helps keep seals fresh. Instead of starting fluid I mix gas and mmo 50/50 help keep cylinder oiled and compression good.smokes some when starts but that's good.

[WVHillbilly520H 10,373]

MMO does help keep the carbon at bay on the valves and piston tops seen in action myself with dad's Kohler powered CCs.

[WHX?? 48,780]

3 hours ago, WVHillbilly520H said:

MMO does help keep the carbon at bay

You talkin add it to the oil or gas Billy?

[WVHillbilly520H 10,373]

5 minutes ago, WHX24 said:

You talkin add it to the oil or gas Billy?

Gas... By the directions couple ounces per gallon of fuel... Might see a bit of smoke first time using but I believe it's the carbon slowly working it's way out the exhaust.