Marvel Mystery Oil - Oil Enhancer and Fuel Treatment, 1 Gallon
Marvel Mystery Oil - Oil Enhancer and Fuel Treatment, 1 Gallon
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Marvel Mystery Oil - Oil Enhancer and Fuel Treatment, 1 Gallon

Marvel Mystery Oil - Oil Enhancer and Fuel Treatment, 1 GallonMarvel Mystery Oil Oil Enhancer and Fuel Treatment 1 Gallon2 pack Marvel Mystery Oil Oil Enhancer and Fuel Treatment 1 Gallon
Pack Size:Single

Key item features

  • Enhanced Lubrication: Positive lubrication for smoother starting and longer tool life
  • Engine Cleaner: Dissolves gum and sludge that cut down tool speed and power output
  • Rust Prevention: Prevents rust and corrosion
  • Performance Boost: Improves compression, power, and MPG
  • Versatile Use: Suitable for conventional, synthetic, and 2 and 4 cycle oil
  • Fuel Compatibility: Use in all gas types, including diesel and ethanol blends
  • Convenient Size: Available in a 1-gallon jug
  • Safety Warning: Harmful or fatal if swallowed, and the product is combustible
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Current price is $41.59
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  • Free 30-day returns

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Sold and shipped by MarineEngineParts
4.647058823529412 stars out of 5, based on 17 seller reviews(4.6)
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Customer ratings & reviews

4.7 out of 5 stars
stars596 ratings342 reviews
How item rating is calculated
4.4
4.7
4.8
5.0
4.7
5.0
  1. 5 stars88% (527)
  2. 4 stars5% (32)
  3. 3 stars1% (8)
  4. 2 stars1% (5)
  5. 1 star4% (24)

Reviews summary

Pros

  • : Offered at a lower cost compared to others.
  • : Improves engine efficiency and longevity.
  • : Enhances fuel efficiency and engine functionality.
  • : Suitable for various gasoline-powered engines and equipment.
  • : Helps increase miles per gallon.
  • : Improves gas mileage in various vehicles.
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Showing 1-3 of 342 reviews

May 24, 2026
Louise
Top Reviewer
Item details
Multipack quantity: 1
Sold and shipped byMarineEngineParts
5 out of 5 stars review

Verified Purchase

Smooth running engine %26 better gas mileage

Keeps my engine from knocking %26 running smoothly. I also like the better gas mileage. I keep two quart bottles that I refill from the gallon jug. The quarts fit in my rear car door near the gas tank lid. On long trips, I need to use 2 quarts for 8 gas tank fills.

Helpful?3KTAO1CXKQ4816767858
May 30, 2014
1hobbyist
5 out of 5 stars review

Verified Purchase

Preventive Maintenence

I have been using Marvel Mystery oil for years in my garden tractor, tiller, pressure washer, weed wacker and I add it to the fuel every time there is no better product it does exactly what it says. I have found that Walmart is the best price for 1 gallon and no one has is at a better price.

Helpful?3KTAO1CXKQ4816767858
Nov 20, 2016
runa
5 out of 5 stars review

Verified Purchase

Great produce

I used this product for many years. I put InThe oil and the gas because it has proven to me that it makes my equipment last for many years. We have a lot of property and a lot of equipment to take care of an a lot of hours of use. MMO has kept them working all these years

Helpful?3KTAO1CXKQ4816767858