what's the take on Marvel Mystery Oil

[concretejungle]

I did do a search, and read where it was mentioned by a couple of board members, but there was never a consensus as to whether or not it was a good oil additive.

When i had an Isuzu trooper, i had alot of issues with the valves ticking. The isuzu service manager suggested Marvel Mystery oil (MMO) and it worked great. Stopped the ticking, and the truck ran smoother.

I don't have any ticking issues, but was curious if this is a good additive to keep the upper sludge that we have seen in posts over the past couple of days from occuring. I was told that MMO would clean upper engine components. I do keep the motor oil changed regularly with M1 syn, so maint. is not an issue. Just trying to maximize performance and longivity.

So.....what do yall think? Good, bad, dunno....

 

[woody]

best mixed with Gin...actually makes Gin tolerable...shaken...

I've used it many times, usually on the last day prior to changing oil, but not as a regular additive. It works wonders on stuck engines (pour down the plug holes).

 

[Scamper]

I agree with Woody. When I used to use it (many moons ago) I would just add it to the oil and drive around for about a day, then change the oil. Never kept it in there through the oil's entire lifetime.

It worked pretty good as I recall. You can probably get the same effect by adding a pint or two of mineral spirits or kerosene and driving around a bit--I think spirits is the main ingredient in MMO.

 

[Lars]

I agree with Woody. When I used to use it (many moons ago) I would just add it to the oil and drive around for about a day, then change the oil. Never kept it in there through the oil's entire lifetime.

It worked pretty good as I recall. You can probably get the same effect by adding a pint or two of mineral spirits or kerosene and driving around a bit--I think spirits is the main ingredient in MMO.

I was told that MMO is nothing more than kerosene and atf.

 

[hj60]

I keep a bottle of it in the truck just in case.
Never used it for anything other than lubing a stubborn bolt or two.
It's just something I've always had with me.

 

[cary]

It is a solvent and will thin your oil. Do not use it to clean sludge our of your motor as it may break it all loose at one time and cause plugging of the pickeup screen or oil passages.

http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=5;t=001178#000000

 

[Scamper]

It is a solvent and will thin your oil. Do not use it to clean sludge our of your motor as it may break it all loose at one time and cause plugging of the pickeup screen or oil passages.

http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=5;t=001178#000000

Yeah, I suppose that's theoretically possible. But in all the cars and trucks my friends and I have done this in, there has never been a problem. That may be becuase we never let our cars/trucks get to the point of this one....

 

[swank60]

I use it with just about every oil change, and run it in the oil full time. I don't have any issues with it, and it's mild enough so it doesn't really break everything loose at once - not in my experience, at least. It's not like B12.

 

[Tools R Us]

It is great air motor oil, use it up in your impact.

 

[Officer Friendly]

It looks like Coolaid and tastes like peptobizmol and give me a rash in the morning, I perfur Lucus over marval

 

[boerboel313]

I just added it to my last oil change, 60 mile ago. I will change th efilter again before I change the oil. So why is it bad to leave it in the entire life?

 

[Skylo]

I use Liqui Molly engine detox instead

 

[ntsqd]

Why is this in "Camping"?

 

[sggoat]

We used to use a 40/60 mix of MMO/kroil in our Utility Gas turbine exhaust systems. The compressor bleed valves were subjected to temps anywhere from 800 to 3500 deg F. This mix always performed, and kept the valves working--even in that harsh environment.
Not sure how this info applies to the 40 crankcase oil, but given the above, can't see how it could possibly hurt. I wouldn't run this for a long time, though. Just enough to help clean the oil passages(less than a couple day's driving). Drain it out, change filter and refill w/normal oil.
Some folks dump a quart or so of kerosene(mineral spirits) in and run for a day or two then drain(as Woody implied, and Scamper said) Can't see how this could "plug up" any filter/screen, as it will dissolve most sludge and keep it in suspension until drained out a day or so later.

 

[AlaskanWheeler]

Recently I was searching for oil related subjects, and what I would do, is Google the question and look for anything that was on the Bobistheoilguy.com website, and usually found a lot of information.

 

[Pin_Head]

It has always been a Mystery to me.
It looks like ATF and smells like kerosene.

 

[nuclearlemon]

if you don't want sludge, change your oil once in a while

 

[platypusREX]

Isn't it just comercial Ed's Red that we use as barrel bore cleaner?
http://www.handloads.com/articles/?id=9

 

[winnie]

if you don't want sludge, change your oil once in a while

x2 ... the key to engine longevity, isn't it ...

 

[Tools R Us]

x2 ... the key to engine longevity, isn't it ...

Not necessarily, oil can last a longtime, changing it too early is just $$ wasted. Most sludge problems can be traced back to poor driving habits, most common is short trip driving, where the motor is never/rarely run at full operating temp. When at operating temp, contaminants (moisture, acid, etc.) evaporate out of the oil and are drawn out by the breather system, if this cycle isn't allowed to complete, they collect, deposit, mostly in the upper part of the motor.