Can You Use Marvel Mystery Oil In Transmission? (Explained)

You’ll get lots of snake oil claiming outstanding results, but it will disappoint you. As an additive, the marvel mystery oil won’t disappoint you. 

The additive can increase gas mileage, protect against engine wear and improve performance. Now, the question arrived whether you can put marvel mystery oil in transmission or if it creates an issue. 

Keep reading the guide to learn more about it.

Explanation of What Marvel Mystery Oil Claims To Do

Manufacturers of Marvel mystery oil claim that oil can improve your driving experience in various ways. Among them are:

  • Cool down your transmission
  • Maintain a clean and lubricated fuel system
  • Enhances fuel efficiency
  • Ensure that the engine is protected from extreme temperatures
  • Keep the engine clean and increase the overall performance 

Can You Put Marvel Mystery Oil In Transmission?

You can use marvel mystery oil in a transmission. MMO is a universal cleaner or lubricant. Unlike harsh cleaners, it boosts the effectiveness of detergents already present in oils and fuels. 

So, it can be safely added to automatic transmissions to reduce wear and clean deposits. But, some previous users don’t support using it in transmission, especially vehicles like Honda Accord.

How to Add Marvel Mystery Oil to Transmission?

Here is a step-by-step guide if you want to add marvel mystery oil to transmissions:

Step 1: MMO recommends using 16 oz oil in the transmission. So, you need to measure 16 oz of oil in a measuring cup. Then, drain a similar amount of fluid from the pan. You can check the user manual if you don’t know where the drain plug is.

Step 2: Remove the cap from the transmission fluid cylinder under the hood. Now, pour the MMO into the transmission using a funnel. After pouring the fluid, place the cap securely and replace it.

STEP 3: Run the vehicle for 20 minutes to get an accurate dipstick reading. Now, turn off the engine and let it cool for a couple of minutes. Now, use the dipstick from the transmission to know whether you fill the fluid correctly. Then, close the hood, and you are ready to go.

How Much Marvel Mystery Oil Do I Add?

The manufacturers recommend using not more than 16 oz marvel mystery oil in your automatic transmission. If you want to add the marvel mystery oil with fuel, you shouldn’t use more than 25%. 

If your vehicle crankcase holds 5 quarts, add 4 quarts of motor oil and 1 quart of the motor oil additive.

Can You Put Too Much Marvel Mystery Oil?

Can You Use Marvel Mystery Oil In Transmission?

You shouldn’t use too much marvel mystery oil. It’ll make the mixture thick, as marvel mystery oil is a mix of solvents. You will notice several issues if you overuse the oil. As a result, the car will produce excessive smoke, and the overall performance will be affected.


Marvel mystery oil can be used in various ways, such as in-vehicle transmissions, fluids, and much more. 

So, if you use the marvel mystery oil in the recommended way in your automatic transmission, it’ll not create any negative effects and will increase the overall performance.

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