5 Best Catalytic Converter Cleaners

I hope you agree with me when I say:

 There is nothing more relaxing than sitting in a clean car.  

This is not something people are familiar with, however, it is extremely important for a vehicle.

The reason why a catalytic converter is important is that it improves the efficiency of your car, which has a direct impact on its performance and health. In case the catalytic converter is clogged, the check engine light will turn on.

If you do not clean your catalytic converter, over time, it would result in clogging and build-up in the catalytic converter. Therefore, instead of investing in a new catalytic converter, it is better that you clean it more often. Since you cannot clean it with a brush, you require a spray, that is, catalytic converter cleaner.

Read on to gain more knowledge around this topic. We have included a set of FAQs for your convenience along with a video regarding How to clean your catalytic converter. 

The Best Catalytic Converter Cleaners in 2021

Here are our top picks for the best catalytic converter cleaners:

Catalytic Converter CleanersRatingPrice
DURA LUBE Severe Catalytic and Exhaust Treatment 10/10 (Editor's Choice)
Check Price
Cataclean 120007 10/10
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Hi-Gear EZ Emissions Pass and Catalytic Converter Cleaner 9/10
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CRC Guaranteed to Pass Emissions Test Formula 9/10
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Solder-It (CAT-1) Catalytic Converter Cleaner 8/10
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1- DURA LUBE Severe Catalytic and Exhaust Treatment

Why we love it: 

  • Provides protection against oil poisons.
  • Helps in the reduction of phosphorus and zinc retention levels.
  • Long-lasting and effective.
Available in a pack of 6. None.
Budget friendly.
Effective even after 4-6 years.

2- Cataclean Complete Engine, Fuel, and Exhaust System Cleaner

Why we love it: 

  • Reduction in hydrocarbon emissions by 50%.
  • Improves overall vehicle performance.
  • Increases catalytic efficiency.
Safe for gasoline, diesel, and flex fuel vehicles. Not for 2 stroke engines.
Eco friendly.
Budget friendly friendly.

Why you should get it?

3- Hi-Gear EZ Emissions Pass and Catalytic Converter Cleaner

Why we love it: 

  • Removes carbon deposits.
  • Cleans the entire fuel system.
  • Regains lost horsepower.
Prevents bad smell. Only for gas engines.
Acts as multipurpose. May not last more than years.
Removes emissions.

Why you should get it?

4- CRC Guaranteed to Pass Emissions Test Formula

Why we love it: 

  • Cleans fuel system.
  • Improved power.
  • Reduces emissions.
Double money back guarantee. Is able to cater to lesser gallons as compared to the others.
Works with all kinds of gasoline.

Why you should get it?

5- Solder-It (CAT-1) Catalytic Converter Cleaner

Why we love it: 

  • Cleans the oxygen sensor.
  • Gets rid of the bad egg smell.
  • Long-lasting.
Works well with all catalysts. Does not clean the fuel system.
May last upto 5 years.
Available in 2 sizes.


Now that we have come to an end, we hope you have developed some understanding regarding this topic. We have listed down the best 5 catalytic converter cleaners out there, however, go with the one you think would fit your requirement the most! We hope that you will not have to waste any more time searching for the best catalytic converter cleaners, instead, it will now be spent on testing out the product.

Each of the products mentioned above has different features; some focus just on the cleaning of the catalytic converter whereas the others claim to improve the overall health and performance of the vehicle. Do keep in mind that these engine catalytic converter cleaners might perform differently on different vehicles, that is why give another one a try in case your first pick fails to deliver results.

Check out this video if you are wondering how to clean a catalytic converter:

Frequently Asked Questions.

How often should I use the cleaner?

Every brand has its own recommendation. Please go through the instructions of whichever catalytic converter cleaner you use. As per our research, it is recommended once per oil change. However, if you have an older vehicle that collects emissions faster than usual, you can need to use it more frequently.

Can a cleaner fix my broken catalytic converter?

If your catalytic converter is completely clogged, or worse than that, completely broken into pieces inside the exhaust, then nothing can bring it back to life. You will have to replace it with a new one. In case it is not broken, then a cleaner would be enough to clean the emissions.

How will I know if my catalytic converter is broken?

If the catalytic converter is broken, you would feel the movement of bits and pieces inside the exhaust. That is why, take a hammer and tap the exhaust softly, if you hear any rattling, then it is broken, otherwise, it would be fine.

 Enjoy a smooth drive without having to worry about the performance of your car!