3 Best Catalytic Converter Cleaners In 2022

Updated Oct 12, 2021

In case your car failed the emission test due to the catalytic converter, you need the best catalytic converter cleaner. If the term “cat cleaner” is unknown to you, this post will give you an idea of what it is and how it can help you pass the emission test. Catalytic cleaner converter is a specially made solution to clean your car’s converter. All you need to do is to add it to your fuel system and use it until the tank is empty.

The product helps clean the converter. But it will not fix your catalytic converter if you have a serious problem. You may still need to replace it. The cleaner will help to reduce emissions and help your engine function at its best. It also increases the MPG. The cleaning solution will not be able to help if the reason for failing the emission test is due to the rich fuel air or other issues.


What is a Catalytic Converter Cleaner?

catalytic converter

Via carbon-cleaning.co.uk

As the fuel burns, the car engine produces pollutants that can harm the environment. A catalytic converter cleaner is used to make sure that your car emits clean gases that are safe for the air. This is done via a chemical reaction between the exhaust gases and the metals inside the converter.

When There is A Problem On Your Catalytic Converter?

If you notice that your car is not running properly and is consuming more fuel than before, then there is a problem. The unburned fuel will cause damage to the catalytic converter. It also produces a rotten egg smell. This is the main objective of the catalytic converter cleaner - to clean the components that get in contact with it.

The Advantages of Using The Best Catalytic Converter Cleaner

Best Catalytic Converter Cleaner 2

Via topautotools.com

How Catalytic Converter Cleaners Improve Engine Performance?

The catalytic converter cleaner will improve the way your car engine burns fuel. It has solvents and acetone that makes sure combustion is complete. The addition of oxygen molecules helps improve the engine performance. This will keep your car performing at its best.

How Catalytic Converter Cleaners Reduce Carbon Built Up

Clogged-up injectors and cylinders caused by carbon build-up are a common problem no matter what type of fuel your car uses. This greatly affects your car's engine performance. A high-grade cleaner can prevent carbon deposits and improve fuel combustion.

How Catalytic Converter Cleaners Reduce Harmful Emissions

If your car has failed the emission tests due to your catalytic converter, then you need something that will help clean it. You need the best catalytic cleaner to keep emissions within the required levels. During combustion, cars release aldehydes, active peroxy compounds, and carboxylic acids. Thus, instead of your car releasing harmful carbon and nitrogen based oxide, it will help produce less toxic gasses. With continued use, the engine will produce amazing results.

Top 3 Best Catalytic Converter Cleaners

**Below, you'll see more detailed reviews, but you can also click the links above to see current prices and read customer's reviews on Amazon.

1. Red Line (60103) 15 Ounce Fuel System Cleaner

The Red Line S1 is a cleaner that also prevents moisture build up, debris and carbon deposits. There are lots of catalytic converter cleaners that use different sorts of PEA purity or ingredients and synthetic oil. This product is verified PEA of 30 to 50%, so you are assured that you are getting the best quality cat cleaner.

Red Line (60103) Efficiency

With just one treatment, it can clean the converter to up to 100% efficiency. With Red Line S1, the need for octane will be reduced by up to two points. The product uses a unique synthetic upper cylinder lubricant. It is also designed to handle both the lowest and highest engine temperatures in the market.

You can use the product continuously. Compared to its competing fuel system cleaners, this product sets itself apart by providing a higher, more profitable treatment for combustion chambers and intake valves. Use one bottle per tank for effective treatment.

Pros Of Red Line (60103) Fuel System Cleaner

  • Reduces carbon build up to improve fuel efficiency
  • Improves car performance
  • Safe for diesel, gasoline, flex-fuel and hybrid vehicles
  • Easy to use
  • Does alter fuel composition
  • Restores catalytic converter, fuel injectors, oxygen sensors, and cylinder heads
  • Allowed in 50 states

Cons Of Red Line (60103) Fuel System Cleaner

  • No known drawbacks

Why Should You Consider Red Line (60103) Fuel System Cleaner?

The customers who liked Red Line's product, REALLY liked it. The majority of reviews were overwhelmingly positive about how well works if your car is running 'sluggish'. There were a few customers who loved the price point. That it actually saved them money instead of paying tons of money on repairs!

Should You Buy Red Line (60103) Cleaner ?

We like the Red Line (60103) Complete SI-1 Fuel System Cleaner because it is safe for a wide variety of fuel types, as well as reducing carbon build up! Who wouldn't want to maximize their fuel efficiency?

Not recommended for customers who are loyal to other, more expensive brands. All in all, an amazingly effective product for your car!

2. Royal Purple 11722 Max-Clean Fuel System Cleaner

The best thing about this fuel cleaner and stabilizer is that you can use it in various ways. Aside from efficiency and power, this is also very effective in preventing rough idling and stalling. The product will help reduce carbon monoxide, hydrocarbon, and nitrogen oxide emissions.

If you are looking for a fuel system cleaner that penetrates deep and clean injectors, definitely this is the best product. By using the Royal Purple 11722, you reduce engine knocking and pinging because of deposits.

Compatibility Of Royal Purple 11722 Cleaner

It is highly compatible with any type of fuel system. To prove its efficiency, several tests have been conducted. The test results prove that the Royal Purple 11722 was able to improve fuel consumption by up to 3.2% and it increases the horsepower by 2.6%.

Pros Of Royal Purple 11722 Cleaner

  • Powerful but non-abrasive
  • Reduce the need of octane by two points
  • Both a cleaner and prevents moisture build-up, debris and carbon deposits
  • Verified by PEA
  • Can handle both the highest and lowest engine temperature in the market

Cons Of Royal Purple 11722 Cleaner

  • Not recommended for diesel vehicles
  • Cannot stop or restore functionality

Why Should You Consider Royal Purple 11722 Cleaner?

The reviews for this product ranged from incredibly detailed (clearly someone who knows what they are talking about) to people who have obviously never worked on their car before. No matter their level of understanding, a lot of customers were able to CLEARLY see the performance difference in their vehicles!

Customers raved about increased MPG readings. Not to mention going from popping exhausts, to smooth rides!

Should You Buy Royal Purple 11722 Cleaner?

We put the Royal Purple Max-Clean Fuel System Cleaner and Stabilizer on our best list for Best Catalytic Converter Cleaners because it is POWERFUL! However, not recommended to customers who drive diesel vehicles! Get the most power out of your cleaner with this awesome brand.

3. Cataclean Engine And Catalytic Converter Cleaner 450ml

Cataclean catalytic converter cleaner is an exhaust system and fuel cleaner that gets rid of carbon build-up and cleans your car’s catalytic converter, fuel injectors, cylinder heads and oxygen sensors. This product does not affect fuel composition and is not harmful to gasoline, hybrid and diesel engines.

How Does Cataclean Engine And Catalytic Converter Cleaner Work?

It lowers the total hydrocarbon emissions by 50%. The Cataclean fixes drivability concerns like power reduction, hard starts and hesitation, as a pre-treatment before undergoing emission test. It will also help extend the life of your car engine. The product can help to prevent the replacement of expensive oxygen sensors or your car’s catalytic converter. In case you need to replace your converter, use the Cataclean during installation to extend its shelf life.

How To Use Cataclean Catalytic Converter Cleaner?

The product is easy to use; simply pour it into your fuel tank. The Cataclean Engine And Catalytic Converter Cleaner is legal in the USA and complies with VOC and OTC regulations. It also complies with the Federal Low Sulphur content requirements for use in non-road engines and diesel motor vehicles. For better performance and protection, use the product four times a year.

Pros Of Cataclean Catalytic Converter Cleaner

  • Prevents premature spark plug fouling
  • Stabilizes fuel during off-season and storage
  • Prevents rough idling, stalling, and engine hesitation concerns
  • Reduces hydrocarbon, carbon monoxide and nitrogen oxide emissions
  • Compatible with any type of fuel

Cons Of Cataclean Catalytic Converter Cleaner

  • No known drawback so far

Why Should You Consider Cataclean Catalytic Converter Cleaner?

There were a LOT of reviews from customers who had check engine lights who used this product on their car to see that little light turn right off! Others observed huge improvements in their car's performance. One even said, "I felt the car was getting more power after adding the Cataclean..."!

Additionally, several buyers actually purchased this product based on other reviews, only to come back and put their satisfaction into writing themselves!

Should You Buy This Catalytic Converter Cleaner?

We love this product for our Catalytic Converter Cleaners top three list because it not only helps to reduce hydrocarbon, carbon monoxide, and nitrogen oxide emissions, but it can also help your car's performance in the long run!

Not recommended for customers who prefer to have experts handle their car care needs. Altogether, an excellent product for your catalytic converter needs!

4. Hi-Gear HG3270s EZ Emissions Pass And Catalytic Converter Cleaner

Key Features:

  • Removes deposits of carbon.
  • Reduces emission of toxic gases like CO2.
  • Increases fuel efficiency.
  • Restores lost horsepower.
  • Full system cleaner.

Use Efficiency and vehicle performance: The catalytic converter cleans the entire system including; injectors, combustion chambers, pistons, and valves, and leaves them fresh for continued use. Besides, this product helps get rid of the unpleasant rotten egg-like smell that causes discomfort.

Vehicle compatibility: Hi-Gear catalytic converter is universal and can be used on all types of vehicles. Some examples are; street touring motorcycles, street sport motorcycles, marine personal craft, all-terrain vehicles, street motor scooters among others.


  • Decreases hard start.
  • Improves fuel efficiency.
  • Ideal for exhaust and full system.
  • Improves overall vehicle performance.

Cons Of Cataclean Catalytic Converter Cleaner

  • Can cause a fire.

Verdict: If you’re looking for a universal catalytic converter that you can use on any type of vehicle, then you may need to consider Hi-Gear HG3270s.

5. Solder-it (CAT-1) Catalytic Converter Cleaner

Key Features:

  • Helps get rid of the rotten egg-like smell.
  • Cleans oxygen sensors.
  • Prolongs time between tune-ups.
  • Designed for monolithic and pelletized catalytic converters.

Use Efficiency and vehicle performance: This catalytic converter is designed for monolithic and pelletized catalytic converters types and works as a cleaner and a deodorizer. First, it effectively cleans oxygen sensors, extends the time between tune-ups, and secondly, it helps get rid of the rotten egg-like smell.

Vehicle compatibility: The amazing thing is that it has universal compatibility thus you can use it on any type of vehicle.


  • Increases fuel efficiency.
  • Eliminates the awful rotten egg odor.
  • Prolongs converter life.


  • Can catch fire.

Verdict: This catalytic converter has universal usage thus can be used in all vehicles. If you’re looking for one that you can use on any type of vehicle, you may need to consider it.

Best Catalytic Converter Cleaner For You

Does catalytic converter cleaner really work? Based on the reviews and testimonies of previous users, the answer is yes. It is the best way to improve fuel economy and keep the engine working perfectly. But if there is one thing that you need to remember, it would be the reality that not all products are the same.

According to the above 3 best catalytic converter cleaner reviews we see that the Royal Purple Max-Clean is the perfect choice. What do you think?

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4/5 - (2 votes)