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Your cart is empty.Marvel Mystery Lubricating Oil is safe for catalytic converters and oxygen sensors. Added to gas it cleans and lubricates fuel injectors and carburetors, improves gasoline mileage, extends spark plug life, reduces and prevents varnish and gum build-up. Added to oil it prevents valve sticking and clatter, fortifies properties of engine oil, prevents breakdown caused by extreme temperatures, reduces and prevents acid and sludge formation and promotes easier cold weather starts.
Anthony Maurino
September 4, 2025
I have been using Marvel Mystery Oil for 20 years. It always makes my engine run smoothly and quitely.
Amber Brown
August 31, 2025
We purchased this item for out rototiller that has been sitting for several years. It's running great!
Melanie
August 19, 2025
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.
Patsy Or Stanley Alexander
July 27, 2025
I hope this is Marvel Miracle oil.
Moe420
July 13, 2025
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.
Zach
July 11, 2025
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.
Robert J. Besaw
July 8, 2025
great for gas motors
David Anderson
June 22, 2025
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.
Customer
March 31, 2025
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.
Adam
March 7, 2025
Saved my smoky lawn mower!, great product!
jean-guy Lalonde
January 15, 2025
petits moteurs
Sandra Persaud
January 1, 2025
Worked
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