Marvel Mystery Oil

Marvel Mystery Oil - Oil Enhancer and Fuel Treatment, 32 oz

$6.53
(4.89) 4.89 stars out of 18 reviews 18 reviews
$6.53
$6.53
Free overnigh delivery
FSA and HSA eligible
Marvel Mystery Oil - Oil Enhancer and Fuel Treatment, 32 oz

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Customer reviews & ratings

4.89 out of 5stars
(18 reviews)
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Most helpful positive review

5.00 out of 5 stars review
Verified Purchaser
03/31/2014
Great Product
All my cars have this mixed with Engine Oil and one has 360.000 on it and runs fine all because of Marvel!
Speedl

Most helpful negative review

4.00 out of 5 stars review
Verified Purchaser
03/12/2023
Good additive
Seems to work with old engines well. Walmart price was one of the best too.
Wally
  • 4.00 out of 5 stars review
    Verified Purchaser
    05/14/2023
    came dew damaged - almost 70ml spilled, bottle cap bad working..
    G
  • 5.00 out of 5 stars review
    Verified Purchaser
    05/12/2023
    I get this often for soaking my ratcheting tools and it makes Old Stuck parts of tools work like magic. Ratchet wrench or just a stubborn bolt a little bit goes a long way
    Jason
  • 5.00 out of 5 stars review
    Verified Purchaser
    04/27/2023
    Great for “predictive and preventative maintenance
    I learned about this product while I was a Sales Consultant for a Well Drilling and Pumping System Company for deep wells. Our knowledgeable Mechanics…who totally believe in predictive and Preventative maintenance…use Mystery Oil exclusively in the big rigs and engine test pump equipment. My farming accounts also used for all their machinery. It's been around for many moons.
    SunDevilCountry
  • 5.00 out of 5 stars review
    Verified Purchaser
    04/25/2023
    An Old Product That Works
    Marvel Mystery Oil as a product is probably almost as old as I am, but it still performing as advertised, quieting a noisy valve and/or a lifter. It's much cheaper alternative to a mechanic.
    Brian
  • 4.00 out of 5 stars review
    Verified Purchaser
    03/12/2023
    Good additive
    Seems to work with old engines well. Walmart price was one of the best too.
    Wally
  • 5.00 out of 5 stars review
    Verified Purchaser
    01/20/2022
    It works
    It works I have a new 2021 Honda CR V. It has the 1.5 turbo with direct injection. It has a sluggish response when pushing on the gas pedal. I put it in my gas tank and all sluggish response is gone and a smooth Idle too.
    Peewee
  • 5.00 out of 5 stars review
    Verified Purchaser
    01/13/2022
    Good products, fair price…..
    Everything turned out ok with this order. The order was shipped in two different increments, but we got our products. Thanks, Kenneth
    Kenneth
  • 5.00 out of 5 stars review
    Verified Purchaser
    07/23/2021
    I have been Fixing and selling cars for 25 years and I've done extensive research and talk to master mechanics with 50 years experience folks this is the best stuff to clean out any nasty fuel or any gunk in your engine. I'm running Marvel mystery oil in all my vehicles including my 2001 suburban with 330,000 miles
    Dsanch
  • 5.00 out of 5 stars review
    Verified Purchaser
    07/03/2021
    Great product.
    I like it because it helps keep my injectors on my Cummins lubricated and clean. It's also adds lubricity to the fuel to lubricate the fuel pump and fuel distribution pump in these low lubricity fuels we have now a days.
    Emil
  • 5.00 out of 5 stars review
    Verified Purchaser
    06/05/2021
    Should be called Engine extend-a-life.
    This stuff is both a cleaner and a lubricant. I have been using this in all my vehicles ever since they took lead out of gasoline. Oops, did I just give away my age. Lead acted as a lubricant or cushion on the valve face to the valve seat and other engine components. Im a firm believer in using this in all my vehicles including my lawnmower. I use it with every fill. I also us it in the crankcase to help keep the engine clean internally. I currently own a 1999 Ford F-250 Super Duty 5.4L. I have owned it for 17 years and it still runs like new.
    Tim
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