Marvel - Mystery Oil, 32 oz. (013) Review

Average Reviews:

(More customer reviews)This stuff is cheap and it is good at dissolving carbon deposits.What is in it?99% of it is two types of paint thinner: heavy naptha and stoddard solvent.<1% of it is ortho-dichlorobenzene.Though the dichlorobenzene is a very good carbon/sludge dissolver, they don't use very much of it because it is expensive and the chlorine atoms make hydrochloric acid in your engine.This in itself isn't an issue because all API approved motor oils contain a high amount of calcium-based detergents which neutralize the acid. It will shorten the lifespan of your oil though.

The product has been around a long time and has been very successful.The only trouble with it is the way it is marketed.It comes off as snake oil.This isn't the case.The product works, but with some caveats.It thins out your oil a little bit.A whole quart of it will thin your oil a whole grade (5W30 becomes 5W20).Also, it's not a very good lubricator so you only want to use it occasionally.Using it every oil change will definately increase wear and tear.You probably don't want to put it in a truck while you plan to do some heavy towing with it.And if you have a lot of sludge use it with caution.You don't want to use too much too fast and get chunks of sludge floating around in the oil lodging into worse places than it was before.Don't get it on your hands because it will absorb in your skin.

Kano Labs makes a similar but stronger product called Kreen. Amsoil and Gunk also make solvent-type oil additive products that are intended to be 5-20 minute flushes you add to the oil just before changing the oil out.Marvel Mystery Oil is the most popular product of it's type though.

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Product Description:
ADDED TO GASOLINE: Cleans and lubricates fuel injectors and carburetors. Improves gasoline mileage. Reduces and prevents varnish and gum build-up. Extends spark plug life.Safe for catalytic converters and oxygen sensors. ADDED TO ENGINE OIL: Prevents valve sticking and clatter. Fortifies properties of engine oil, prevents breakdown caused by extreme temperatures. Promotes easier cold weather starts. Reduces and prevents acid and sludge formation. FOR ALL MARINE ENGINES: Inboard and outboard.

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