



🚗 Unlock peak engine performance with every drop!
Marvel Mystery Oil CD 2 MM12R is a versatile 16 oz. fuel and oil additive that cleans fuel injectors, prevents engine varnish, reduces valve clatter, and improves fuel economy. Safe for catalytic converters, it enhances cold starts and protects engine oil from extreme temperature breakdown, making it a trusted choice for universal automotive maintenance.






| ASIN | B0009JKGKG |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #112,960 in Automotive ( See Top 100 in Automotive ) #110 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 week ago
1 month ago