



🚗 Unlock your engine’s hidden potential with Marvel Mystery Oil!
Marvel Mystery Oil CD 2 MM12R is a 16 oz. universal automotive additive that cleans fuel injectors and carburetors, improves fuel economy, prevents varnish and gum build-up, and protects engine components from extreme temperature damage. Safe for catalytic converters and oxygen sensors, it also enhances cold starts and extends spark plug life, making it a trusted choice for professional-grade engine care.






| ASIN | B0009JKGKG |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #103,736 in Automotive ( See Top 100 in Automotive ) #112 in Engine & Oil Fluid Additives |
| Brand | Marvel Mystery Oil |
| Customer Reviews | 4.7 4.7 out of 5 stars (605) |
| Date First Available | July 7, 2004 |
| Global Trade Identification Number | 00077874000122 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.04 pounds |
| Item model number | MM12R |
| Manufacturer | Marvel Mystery Oil |
| Manufacturer Part Number | 50094 |
| Model | MM12R |
| Product Dimensions | 9 x 4 x 2 inches |
| Size | 16 oz. |
| UPC | 077874000122 |
| Vehicle Service Type | Car, Truck |
D**.
Marvel Mystery Oil is Marvellous!
This is great stuff. Use in gas or oil for extra lubrication. Stop engine smoking
D**N
A fine air tool oil and more
I've been using Marvel Mystery Oil for my air tools since the early 1970's when an elderly mentor told me to use it when I was a young man just out of the service on my first civilian job. It works fine and my air tools have always lived a long and useful life with out gunking up or showing much wear. It has never failed me. I also use it for a general light lube oil and when mixed with a little lacquer thinner it frees rusty bolts about as good as anything else I've tried. My elderly mentor had been a mechanic his whole life so the history of using this oil these ways has been well proven over time.
M**0
Wow!
Silverado 5.3L had a lifter tick or just a mystery tick-either way this cured it & it’s been 3 months so I’d say it’s not just a temporary fix. FYI I tried a couple other additive “ remedies “ ….. this one actually worked. Just added the whole bottle then drove for 15 minutes & changed the oil. Tick was gone immediately. Shoutout to Derrick from VGG “ I don’t know what’s in it… it’s a mystery… stuff just works “ UPDATE- engine failed…. still gets rid of lifter noise 🤪 …… I’m conflicted about it. It does work for lifter tick so I digress.
G**.
Decades old product that works!!!!
What can I say, this stuff never disappoints! There’s a reason your father and grandfather used it! It just plain works wonders in an engine or a gas tank. Got an old engine, give it a try!
P**R
Great
I hope this is Marvel Miracle oil.
M**E
Marvel is always good
I always need a supply of Marvel. Sometimes for the chainsaw, sometimes for the fuel, sometimes for the car engine or lawnmower. I am never disappointed when I use it.
Z**H
Excellent product
I put this in any small motor I’m working on. If you have an engine that is surging run this through the gas for about 30 minutes.
A**O
The go to product for smooth motor engine
I have been using Marvel Mystery Oil for 20 years. It always makes my engine run smoothly and quitely.
A**M
Saved my smoky lawn mower!, great product!
A**X
Arriver rapide et fidèle à la description
A**R
Works very well for gdi motors, which run well as faster speeds. This is designed for gas asperated, ekectric throttle body fuel enjection motots.would definitely buy it again.
J**E
petits moteurs
S**D
Worked
Trustpilot
1 month ago
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