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Best Catalytic Converter Cleaners – Top 5 Brands To Buy In 2021 Reviews

The introduction of catalytic converters has revolutionized the way we drive. However, it is a part that’s often overlooked.

Needless to say, keeping your catalytic converter in proper condition is extremely crucial for your vehicle’s performance. A catalytic converter cleaner can be of great help for knocking gunk, grime, and other carbon-based buildups out of the fuel system.

The availability of a plethora of options can confuse you in finding the right cleaner for your car. Well, read on to learn all about some of the best catalytic converter cleaners currently trending on the market.

Best Catalytic Converter Cleaners – Top 5 Brands To Buy In 2021 Reviews

Best Catalytic Converter Cleaners Comparison Table

ProductsManufacturerEngine CompatibilityRating
Engine Compatibility
Gasoline, diesel, hybrid
5 out of 5 stars (5 / 5)
Engine Compatibility
Gasoline, diesel
4.2 out of 5 stars (4.2 / 5)
Engine Compatibility
Gasoline, diesel
4.5 out of 5 stars (4.5 / 5)
Sea Foam
Engine Compatibility
Gasoline, diesel
4.8 out of 5 stars (4.8 / 5)
Also Great

LUCAS LUC10013 10013 - Catalytic Converter Cleaner

View Price

Engine Compatibility
Gasoline, diesel
4.8 out of 5 stars (4.8 / 5)

Top 5 Best Catalytic Converter Cleaners In 2021 Reviews

1 Cataclean 120007 Exhaust System Cleaner

Cataclean 120007 Exhaust System Cleaner
Our rating:5 out of 5 stars (5 / 5)


  • This product is suitable for both gas and diesel engines.
  • It is environment-friendly and reduces carbon emission.
  • Highly recommended to improve the overall performance of your vehicle.
  • The cleaner is legal in all 50 states as well.
  • User-friendly and available in safe packaging.


  • Not useful on a 2-stroke engine.
  • The price tag is a bit higher for some.

Best of the lot, this Cataclean is one of the best catalytic converter cleaners on the market. This cleaner is incorporated with tons of spectacular features that work beautifully together to deliver top-notch performance.

Since the formula is patented, it works in its own unique way. It is great at restoring the energy of your catalytic converter. The formula breaks away carbon deposits and reduces buildups. This results in a 50% reduction in carbon emission. Besides, it works great on oxygen sensors, cylinder heads, as well as injectors to improve the overall working condition of the vehicle.

One of the best features is that this cleanser will go with most of the vehicles as it is suitable for both gas and diesel engines. Moreover, it is recommended for hybrids. People also love this product for improving the fuel economy.

When it comes to usage, the overall design is quite user-friendly. All you have to do is open the bottle and empty it into the car’s partly filled tank. You can’t ignore the fact that this cleaner is also eco-friendly. Moreover, it is legal in all 50 states.

All in all, use this cleaner frequently to keep your vehicle good on the road. Not to mention, it is worth the investment.

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

Solder-It (CAT-1) Catalytic Converter Cleaner
Our rating:4.2 out of 5 stars (4.2 / 5)


  • Highly effective in cleaning the fuel system.
  • You can also use it to clean the oxygen sensor.
  • Removes the rotten egg smell from the car engine.
  • Available at a very affordable price.
  • Highly efficient in maintaining the health of your vehicle.


  • It does not guarantee to pass the emission control test.
  • You may need more than one bottle.

Another effective catalytic converter cleaner out there is this product from Solder-It. It consists of a high-end formula to ensure better performance of your vehicle.

This cleaner is formulated in a way such that you can use it on all types of engines. Moreover, it is capable of cleaning all kinds of catalytic engines.

That’s not all.

It is highly effective on monolithic and pellet types as well. Another great thing is that you can use this cleaner to clean the oxygen sensors for desirable results.

In addition, the manufacturers guarantee that the cleaner helps you get rid of the rotten egg smell from the car. It leaves the car as fresh as new. Users really admire it for this quality.

Next, the design is user-friendly. The body is nicely designed to save you from any struggle. However, it is generally recommended to wear gloves as the formula is quite strong.

So, if you are looking for an extra-ordinary catalytic converter without breaking the bank, then you should definitely get your hands on this one.

3 Hi-Gear HG3270s Catalytic Converter Cleaner

Hi-Gear HG3270s Catalytic Converter Cleaner
Our rating:4.5 out of 5 stars (4.5 / 5)


  • This cleaner offers a significant increase in fuel economy.
  • It helps in removing the rotten egg smell from the car.
  • Highly suitable for removing carbon deposits.
  • It is capable of restoring acceleration as well as horsepower.
  • The cleaner can help you pass emission tests.
  • Reduces carbon emission and is, therefore, eco-friendly.


  • A single bottle is hardly enough.
  • A bit overpriced than other models.

Anyone will like a powerful addition to their vehicle. This catalytic converter is not only designed to clean up the system but also to improve the fuel economy. It has a variety of features to stay ahead of its competitors.

First of all, the packaging is great. You can easily use it whenever you want to maintain the health condition of your car or another vehicle. The best feature is its ability to efficiently remove all carbon deposits in no time.

It effectively cleans up the fuel system to restore the horsepower and acceleration. Moreover, it can be used for cleaning the combustion chambers, pistons, valves, and injectors to give your vehicle some power.

That’s not all.

The cleaner is also known for removing rotten egg smell from the vehicle for a fresh experience. Since it reduces the emission of carbon dioxide and other harmful gases, it is eco-friendly. Moreover, the company guarantees that the cleaner can help you pass the emission tests as well.

To conclude, this cleaner offers a stunning performance, unlike anything else on the market.

4 Sea Foam SF-16 Catalytic Converter Cleaner

Sea Foam SF-16 Catalytic Converter Cleaner
Our rating:4.8 out of 5 stars (4.8 / 5)


  • It is an EPA-registered product.
  • The cleaner dissolves carbon deposits and cleans the system.
  • Highly effective in cleaning pistons and cylinders.
  • It also lubricates pistons and other parts.
  • Available in various packaging to choose from.
  • It is known for stabilizing gas and diesel fuels for almost two years.


  • The price is not budget-friendly for some customers.
  • Shipping needs some improvements.

In case you are in search of an excellent catalytic converter to maintain the working condition of the vehicle, then look no further. This model from Sea Foam is quite popular among motorists for its superior quality.

It comes in different packaging to help you choose according to your requirement. The formula is highly effective in dissolving carbon deposits and cleaning up the fuel system. It is great for all types of gas and diesel engines to offer versatile performance.

The cleaner removes all the debris from injectors, carb jets, and passageways to keep your vehicle good all the time. Moreover, it lubricates the entire fuel system so your engine will run smoothly and last in the long run.

Wait, there is more to it.

Another important feature is how brilliantly this model stabilizes the gas and diesel fuel for up to two years. Apart from being 100 percent pure petroleum, the cleaner is EPA-registered to mark reliability.

In short, from the system’s cleaning to lubrication, this catalytic converter cleaner covers everything. You can fully rely on this product to enjoy an unforgettable experience.

5 LUCAS LUC10013 10013 – Catalytic Converter Cleaner

LUCAS LUC10013 10013 - Catalytic Converter Cleaner
Our rating:4.8 out of 5 stars (4.8 / 5)


  • This cleaner is formulated for both gasoline and diesel engines.
  • It is user-friendly and available in 2 packaging.
  • With high detergent action, the cleaner keeps the fuel system in good condition.
  • It is useful for passing smog tests.
  • The product also lubricates certain parts of the fuel system for smooth performance.


  • You need to compromise on the price.
  • Customer service can use some improvements.

Last but not least, this LUCAS catalytic convertor cleaner makes its way to our list for exhibiting an exceptional set of features. This cleaner is known for eliminating all the problems of a fuel system that alter the overall performance of the vehicle.

It comes with different packaging and includes a top-notch formula to live up to the expectations of customers. First of all, this product works well with both types of gas and diesel engines to ensure superior operation. Since the formula incorporates super slick oils and additives, it can tackle everything you throw at it. Moreover, the super detergent action thoroughly cleans the entire fuel system.

In addition, the cleaner lubricates certain parts of the system. This helps in the smooth running of the engine for a longer period of time.

Isn’t this amazing?

You will definitely love the fact that this model reduces the emission of harmful gases, thereby making it an eco-friendly option. It can also help you clear smog tests without much struggle.

That’s not all.

The LUCAS cleaner is also quite popular for neutralizing the adverse effects of low sulfur diesel fuel. What else would you want?

To put in a nutshell, this model speaks quality, versatility, and, of course, reliability.

Best Catalytic Converter Cleaners Buying Guide

Choosing the right catalytic converter cleaner can be cumbersome, especially when you come across tons of options. It requires some specialized knowledge to pick the best one for your needs.

Before jumping on any product, you need to consider a few factors to make an ideal choice. Here are some factors that must never be overlooked while making a purchase.

  • Engine compatibility

Since different cars come with different engines, you need to pay attention to the compatibility of the cleaner. While many auto catalytic converter cleaners go well with gasoline and diesel engines, some of them are not accurate for certain engines. Similarly, if you are driving a hybrid car, you need to check the compatibility of the cleaner with the engine.

best catalytic converter cleaner

The best way to do so is by looking at the cleaner’s manufacturer instructions. A quick glance will help you find whether a certain cleaner is compatible or not. You can always find a cleaner that consists of a premium blend to work with all types of engines.

  • Eco-friendly

The catalytic converter cleaner usually comes in a bottle. Therefore, you need to know how safe it is to use in the car. Similarly, it should be eco-friendly. Make sure to check that the cleaner consists of low-sulfur content and meets the necessary regulations like VOC and OTC.

  • Capacity

Though not a critical consideration, capacity is still an essential one. Keep in mind that catalytic converter cleaning is not a one-time job. In fact, you need to do this from time to time. Therefore, it is better to invest in a package that offers a volume discount to bring value to your purchase.

Similarly, don’t go for bigger bottles, as opened once, they tend to lose potency over time.

  • Additives

You will find various cleaners that incorporate additional detergent additives to take the experience to the next level. However, if you drive a regular gas-powered gas, there is no need to invest in something this fancy.

  • Full system cleaning

You should know that a good catalytic converter cleaner is also good at cleaning the entire exhaust system, and not just the catalytic converter. Since each part of the system plays an integral role in the overall performance of the vehicle, you should go for a product that offers thorough cleaning. It should offer a good flush to the cylinder, pistons, as well as valves while lubricating them at the same time.

  • Brand

This might be an important consideration for some of you. Believe it or not, renowned brands have an edge in providing some excellent products. They hold a proven history of delivering quality goods for decades. Therefore, it is suggested to go for a well-known brand to enjoy premium quality.

  • Price

Price can be an important consideration, especially if you are on a tight budget. Just remember, quality always comes at a price. Therefore, set your budget first and then try to pick a model accordingly. Moreover, it is always economical to go for packages instead of a single bottle.

Benefits of Catalytic Converter Cleaner

You might wonder why it is important to invest in a good catalytic converter cleaner. Those who are still struggling to make up their mind for getting a new cleaner should not stop here. We have drawn a list of benefits to convince you. Let’s have a look at them one by one.

  • Lower emission levels

A catalytic converter is specially designed to limit the emission of gases in the environment. Since these gases are quite harmful to human health, it is essential to incorporate a good catalytic converter in the vehicle. Meanwhile, you need to clean the system with an efficient cleaner to serve the purpose precisely.

The cleaner not only helps to cut the emission levels of harmful gases even further but also enables you to pass the test easily.

  • Improves engine performance

The lost power of the engine can be restored with a catalytic converter cleaner. It is indeed one of the major benefits of this product. The improper combustion of fuel leaves hydrocarbon particles on certain parts of the system. We all know that a gunked-up catalytic converter can highly alter the overall performance of the vehicle.

catalytic converter cleaners

Adding the catalytic converter cleaner will effectively clean the fuel injection system. As a result, there will be more power production with less fuel. Moreover, it cleans and lubricates the cylinder to cut down on friction, thereby improving the car’s efficiency.

Any debris in the path of exhaust gases can lead to bad engine performance. The catalytic converter literally clears every blockage for ensuring better results.

  • Saves bucks

It goes without saying that better engine performance will save you huge bucks because of lower maintenance and fuel costs. Similarly, you don’t have to change the catalytic converter as you can clean it from time to time.

  • Reduce bad smell

Any car that has been running for a while tends to develop a rotten egg smell over time. This smell is caused by the build-up in the catalytic converter. So, if your car also has a signature rotten egg-like smell, a catalytic converter cleaner can be of great help. It will remove the smell by cleaning the combustion and exhaust system. Moreover, you don’t have to spend money on replacing the catalytic converter.

  • Protect the engine

Another prominent benefit of a catalytic converter cleaner is protection from any damage. Regular cleaning will prevent the engine from damage, thereby keeping the vehicle good on the road. Similarly, proper fuel and exhaust flow ensure a smoother and better operation.

  • Pass emission tests

As mentioned above, if you have an old car that needs to go for an emission test, a catalytic converter cleaner will be at your rescue. The high-end formulations can dissolve debris and carbon deposits efficiently. A clean converter means clean emissions.

Top Brands

You will find various features in a cleaner that are peculiar to a certain brand. Different manufacturers offer their modified version of a product. However, you just can’t trust any random brand. You have to be really careful while picking a product to regret any loss in the future.

Well, don’t fret.

Here is a list of some of the reliable brands that can meet your demands efficiently.

  • Chevron

Established in 1879, Chevron is a renowned name in the automotive oil industry. With its headquarters in San Ramon, Calif, the brand is known for offering quality automotive products. Its products are characterized by quality, ease of use, and, of course, brilliant performance.

catalytic converter cleaner guide

  • Cataclean

Started in 1995, Cataclean has come a long way since its establishment. The brand prepares a range of patented solutions for cleaning the fuel system of the vehicle.

Their goal is to improve the fuel economy of the vehicle while limiting the emission of harmful gases. In addition, this British company exports its products to Europe, Asia, Africa, and even the USA to mark its position on the market.

  • Solder-It

Solder-It is ideally recognized for offering high-end products that, too, with a reasonable price tag. The company has been around for over 15 years now. Its products generally feature a user-friendly design with quality components to restore the lost power of the vehicle.

  • Hi-Gear

Based in Hudson, Hi-Gear prides itself on manufacturing top-notch engine oils and lubricants. With years of experience, this brand is surely a name that you can trust for a powerful performance. The products are capable of removing carbon debris while restoring acceleration.

catalytic converter cleaners guide

  • Sea Foam

Founded in the 1930s, Sea Foam has developed a good reputation in the industry. The products not only improve the fuel economy but also lubricate the system for a seamless operation.

Catalytic Converter Cleaner Pricing

The market is flooding with different types of catalytic converter cleaners. Apart from varying features, they also differ in their prices. Since they are available in a range of prices, let’s have a look at them to learn the difference.

  • Under $10

Cleaners at this price are surely a good budget option. However, you may not get as good cleaning as you can get with a mid-range product.

  • $10-$20

Cleaners falling in this price range are good at their performance. They are of good quality and effectively get the job done. They are also good for both gasoline and diesel engines.

  • Above $20

Some high-end catalytic converter cleaners come at a higher price. They often bear big brand names and specialty formulations.

How to Clean Catalytic Converters?

Cleaning a catalytic converter is not as daunting as it seems. You just need to get a reliable converter cleaner for this task and follow some simple steps. Make sure the cleaner is compatible with the fuel system and is of great quality.

Here are some easy steps to help you complete the task efficiently.

  • Step 1: Check the spark plugs

First and foremost, it is important to check the spark plugs. This is necessary because excessive carbon buildup can alter the performance of the vehicles. The plug may not be sparking correctly. A good spark plug will reduce the carbon buildup by completely burning the available fuel.

  • Step 2: Add the Cleaner

If the spark plug is in good condition, it’s time to empty the cleaner contents into the vehicle’s gas tank. Make sure to follow all the important instructions that come from the manufacturer of the cleaner.

  • Step 3: Fill the tank

Now, fill the tank until it’s almost full. It is better to consider the fuel to catalytic convertor cleaning mixing ratio for better results.

  • Step 4: Drive around till empty

Once you have completed the above steps, now is the time to drive around your vehicle. It is recommended to drive around for at least 50 miles to achieve the best results. It is even better to drive the car until the tank is empty.

  • Step 5: Check Engine light

Your car’s check engine light should go off by now. If it does not, repeat the entire process. Clear all the error codes by consulting your vehicle’s owner manual.

  • Step 6: Refill the tank

Finally, fill your tank, and you are good to go. You should also go and check the emission levels.


It is important to clean your car from time to time. Though the exact time-frame depends on the usage of the vehicle, 3-4 cleaning sessions are necessary per year for a car to keep it running at its best.


Effectiveness should be your priority whenever you are in the market to purchase the best catalytic converter cleaner. This brings us to the end of this detailed buying guide. Hopefully, by now, you are capable of picking the right product for your needs. The good news is that all our above-reviewed cleaners are quite effective and user-friendly.

However, Cataclean 120007 Exhaust System Cleaner seems to have the edge over the others for being eco-friendly and legal in all 50 states. It removes debris and cleans the entire system thoroughly. Moreover, it shows compatibility with both gasoline and diesel engines.

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