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  • Marvel MM14R Mystery Oil 1 Gallon
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Marvel MM14R Mystery Oil 1 Gallon

by Marvel
| 3 answered questions

List Price: $26.98
Price: $17.49 + $11.89 shipping
You Save: $9.49 (35%)
Only 18 left in stock.
Ships from and sold by The Auto Alley.
  • Positive lubrication for smoother starting and longer tool life
  • Dissolves gum and sludge that cut down tool speed and power output
  • Prevents rust and corrosion
See more product details
8 new from $17.49
Special Shipping Information: This product cannot be returned to Amazon.com because it uses flammable liquids and gases, is classified as a hazardous material, or meets other criteria. Learn more

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$17.49 + $11.89 shipping Only 18 left in stock. Ships from and sold by The Auto Alley.

Frequently Bought Together

Marvel MM14R Mystery Oil 1 Gallon + Hopkins FloTool 10701 Spill Saver Multi-Purpose Funnel + Sea Foam SF-16 Motor Treatment - 16 oz.
Price for all three: $29.02

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Product Information

Technical Details
BrandMarvel
Item Weight8 pounds
Product Dimensions7.5 x 4 x 10.8 inches
Item model numberMM014R
Discontinued by manufacturerYes
Manufacturer Part NumberMM014R
  
Additional Information
ASINB0009JKGK6
Best Sellers Rank #32,951 in Automotive (See top 100)
Shipping Weight9 pounds (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableJuly 7, 2004
  
Warranty & Support
Warranty, Parts: Parts

Product Warranty: For warranty information about this product, please click here
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Product Description

Marvel Mystery Oil cleans and lubricates fuel injectors and carburetors. Reduces and prevents varnish and gum build-up.

Customer Questions & Answers

Customer Reviews

4.8 out of 5 stars
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Most Helpful Customer Reviews

23 of 24 people found the following review helpful By R. Fidler on December 3, 2010
I put Marvel into everything. Into the car's motor oil, fuel tank, lawn equipment (two and four stroke) and it doesn't let me down. I recently pulled the valve cover off one of my cars, after 100k miles - clean as the day they assembled it. If you start out with Marvel and use it like you should, you don't need fuel injector cleaner and you won't have sludge build up in your motor nor plugged up fuel injectors. Putting it in your gas also acts as a upper cylinder lubricant - to help lubricate those places motor oil can't get to.

I grew up with Marvel, my father used it religiously in his '55 Ford. The motor was rebuilt in 1968 (when he got the truck) and it still drives like a clock to this day. Granted, somewhere around 1997 it had to have a valve job done, but that was because it didn't have hardened valve seats and so eliminating lead gas cause that issue. Just like my car, when the cylinder heads were taken off, that motor was as clean as the day it was assembled, not a spot of sludge - GO MARVEL!
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18 of 19 people found the following review helpful By ..R.. on March 8, 2005
This stuff works better then most of the fuel system cleaners on the market today. It will also work as an oil system cleaner, assembly lube, and general maintenance lubricant. Marvel's mystery oil also makes an air tool oil which works equally as well. This is an old tried & true product. Very good buy!
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11 of 12 people found the following review helpful By hippy on July 20, 2013
MMO is a naphthenic solvent and an Upper Cylinder lube which is some type of oil (maybe even mineral). Why is this important? Right now we are forced to run ethanol in our engines, it creates a dry condition and nasty black carbon on our intakes and cylinders. because of this we need to combat this issue or live with burnt out engines prematurely. MMO is good because it is a solvent that wont swell gasket or create high acid, but will lightly clean, and the oil is needed to combat the dry condition. I'm not saying it is some mystery product that solves all ills, but you should be using something to combat what the gov't is forcing us to put in our engines. If not this then what?

I would never run it in my oil, I use high quality REDLINE group V ester based oil and my crankcase needs nothing else ever. But I run MMO in every tank along with Lucas UCL. I can't say 100% it is going to be enough to combat ethanol damage, but in theory it is helping and both products are really cheap by the gallon. My truck runs smoother and I believe I am combating the drying effects of ethanol.

Modern gas is a challenge, it isn't like the good ol days. We should use products that might help keep our engines clean and running, because it is a fact ethanol is burning up our top ends much faster then good old gasoline.

ASK YOURSELF A QUESTION, "WHY IS THE GAS INDUSTRY ONLY USING 10% ETHANOL WHEN IT IS SO BENEFICIAL TO THE GAS INDUSTRY."

Because if they used any higher concentration our engines would be dying so soon the car industry would be voiding warranties. 10% is the number they think they can get away with, any more and there would be huge problems. You can protect your engine from this, adding lubrication to ethanol does help. Gasoline has natural lubrication by it's nature, ethanol does not.
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13 of 15 people found the following review helpful By Tex on November 8, 2011
I've been use MMO for quite a few years and am a firm believer in it. While we don't have enough time for me to write (and for you to read) all the stories I could tell about MMO, I will say that it has saved me a bundle on PMs.
What sold me on MMO was when I was in my teens my boss had an old Craftsmen lawnmower that burned oil and would foul the plugs within about 5-6 hours of running. He added MMO to the gas and the plugs would NEVER foul so long as the MMO was in the gas (2oz to 5g of gas). I couldn't believe it was the MMO, so I ran a tank of gas with no MMO, and you guessed it, fouled plugs. After spending a 1/2 hour cleaning both plugs, I ran the next tank with MMO and no more fouling.
Recently my work truck started making a "pinging" noise from the engine while it was at idle. Sounded like a lifter, but I wasn't sure. I was about to take it to the shop when I decided to try some MMO in the fuel. I added 16oz to 25g of 93 octane gas and now the pinging is gone.
I also use MMO in my Lycoming O-320 (aviation engine) fuel which keeps the cylinders, plugs and valves bright and shiny. Also keeps the plugs from fouling from the heavily leaded 100LL avgas. My A&P mechanic swears by MMO, and after using it for over a decade, so do I.
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6 of 6 people found the following review helpful By Karl J. Simon on January 3, 2013
Verified Purchase
It's not snake oil that for sure. I added 6 oz and filled up with 15 gallons and my Nissan Altima Hybrid's MPG jumped from 34 to 37. This occurred for the first 400 miles and at 573 for the tank, I'm at 36.6. I was averaging 34-35.5 on my computer. Not sure if the price was good, but for sure the car liked the product. Only 24k miles and I always ran fuel injector cleaners every 3k or so. This is the biggest difference I've seen. Not comment on power as I'm a hypermiler.
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11 of 13 people found the following review helpful By Glenn on December 29, 2011
Verified Purchase
I have been using Mystery Oil for the last 50 years and would not run any car with out it! Put this in your Oil & Gas and you car will run much longer with out any trouble!
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10 of 12 people found the following review helpful By Sasha on April 15, 2007
This picture is a 32 oz. (metal can) not the gal. size. The metal can is no longer being produced so I am wondering what you would receive if this product is ordered.

Marvel Mystery Oil is a fine lubricating oil.

I use it in my 300,000+ 1990 Ford Ranger and my 100,000+ 2003 Toyota Tacoma. It works for me and I think I will keep using it.
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Most Recent Customer Reviews

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