Mixing Marvel Mystery Oil w/ 2 Stroke Gas?

So I have started a restoration project and my friend told me to put a tablespoon of Marvel Mystery Oil in the gearbox because it has been years since the bike was run and this "on top of the oil" will "clean er out real good" so i bought a 32oz bottle and added some...I also put a tbl.spoon in the spark plug hole and rotated the engine to coat the pistion...i was told this would help if the rings were sticking...i dont know. So now i have been running MMO in my Jeep Warngler and no more ticking fule valves so now i want to know if anyone put MMO in there 2 stroke mixed gas??? I was also thinking of adding some w/ the antifreze...just a little;) Thanks for the help DP

I wouldn't do it in either of those applications. MMO works to free sticking parts,(rings, etc.), and it will help free some sticking lifters in some instances, but mixing it with 2-stroke oil has no advantages, and it may screw up your mix, especially with synthetic-based 2-stroke oil. Mixing oil with anti-freeze is probably not in your best interest also, although I have no solid facts to back that up.

do you wash your clothes with this stuff and maybe your dishes?

do you wash your clothes with this stuff and maybe your dishes?

Well sure I do, dosen't everyone?

I wouldn't mix it with the fuel. MMO is some good stuff though for vehicles.

I wouldn't mix it with the fuel. MMO is some good stuff though for vehicles.

whats your opinion about adding some to the gearbox/trans ??? that should be ok right???

I don't know about MMO with the clutch? It may make it slip really bad or may not do anything?

I use it all the time with my 2 stroke bikes, especially after a while of not using them. It seems to clean everything out in the engine. It can also be used as a stabilizer too. It's good stuff, and i never had a problem with it.

I use it all the time with my 2 stroke bikes, especially after a while of not using them. It seems to clean everything out in the engine. It can also be used as a stabilizer too. It's good stuff, and i never had a problem with it.

You use it in the fuel? I'd probably doesn't harm anything.

MMO is some good stuff though for vehicles.

can you expand on this?? I want my truck engine to last as long as possible!

Running MMO through the engine will tend to cause a lot of glaze to build up on the bore surface.

can you expand on this?? I want my truck engine to last as long as possible!

It is just a lubricant and cleaner. I put almost 200,000 miles on my GMC Sonoma and I used MMO periodically. I sold the truck with the engine still kicking strong, but the tranny took a shit on me. :busted:

I can't say my engine lasted due to MMO and periodic fluid changes, but MMO didn't hurt it any that is for sure. :excuseme:

I now use MMO in my Dodge Ram 1500 Hemi. :busted:

Running MMO through the engine will tend to cause a lot of glaze to build up on the bore surface.

Are you talking small bore engines or all engines in general?

Are you talking small bore engines or all engines in general?
I'm talking about mixing it with the pre-mix in a two-stroke. I have no experience with it in automotive applications other than as an assembly lube.

RCer's use MMO as an after run oil in both 2 strokes and 4 strokes.

can you expand on this?? I want my truck engine to last as long as possible!

I have started to run 4oz of MMO to 10 gal of gas in my 1997 Jeep Wrangler and i have no more fule valve tick!!! So now Im a "dyed in the wool" MMO fan for life!!! I keep a extra bottle in the Jeep just so i have a back up....it's also good for washing cloathing and dishes :excuseme:

I had just joined a Ram forum and this exact issue was discussed. A guy claimed he put in a full quart to a tank of gas and got better millage. I did some research with no real clear answer. Some say they use transmission fluid the same way MMO. And some people think it will glaze over some parts. Years ago I used a Product called ZMAX and swore it worked. The problem is some of these products make such rediculous claims its hard to believe. In reality gas already has a lubricant and well if your changing your oil every 5 hours like most people I do 15 you dont need any additive.if it gives you piece of mind putting it in and it will not harm anything just do it.

From what I understand, it was developed as a 'cleaner' for carbs. A solvent for small passages that didn't etch the brass or aluminum. Turns out when it got in the gas, it provided better ring seal in some applications.

IMHO, if your motor is tight...you won't see any improvements. If your ring seal is 'aging', you may see improvement.

Just my $.02

Not to turn this thread into a this vs that contest...I use seafoam in my fuel in my bike as a stabilizer. It also reduces detonation from sub par gas. In my truck I use it in the fuel and in the crank case. In the crank case I put it in about 100 miles B4 an oil change to clean things up a bit. I also use it in my intake one a year to remove any carbon deposits.

Might be snake oil...but I believe there is benefit

I will do the guess work and add 2 tablespoons to 2 gal of mixed 2 cycle gas and run it through the bike and see what heppens... I just need to get the bike running first + it will do some good for that 20+ year old carb!!! :excuseme:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now