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Catalytic Converter Cleaner Comparison - May 2025
6 Best Catalytic Converter Cleaner In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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Overview: When it comes to keeping your car running smoothly, maintaining its catalytic converter is essential. It’s important to find the right cleaner that will restore its performance and efficiency. Read reviews to find out which product is best for your car.
Boost Up Catalytic Converter Cleaner Fuel System Cleaners Auto Parts Engine Exhaust Catalytic Converter Cleaner Oil Carbon Removal Treatment Additive for Gasoline and Diesel Car (2)
Model
Liqui Moly 7110 - Fuel Additive, uncoloured
Brand
Cataclean
Brand
Nitrox
Brand
Cataclean
Brand
Wynn's
Brand
Generic
Brand
Liqui Moly
Reviews
46,016 reviews
Reviews
2,596 reviews
Reviews
1,240 reviews
Reviews
1,736 reviews
Reviews
8 reviews
Reviews
864 reviews
Features
Worth the money
9.1
Worth the money
9.3
Worth the money
9.4
Worth the money
9.1
Worth the money
8.6
Worth the money
8.4
Aroma
8.6
Aroma
9.4
Aroma
8.1
Aroma
8.4
Aroma
7.7
Aroma
7.6
Distance
9.1
Distance
9.1
Distance
9.4
Distance
9.3
Distance
8.9
Distance
8.6
Simple to use
9.8
Simple to use
9.9
Simple to use
9.1
Simple to use
9.6
Simple to use
9.1
Simple to use
9.1
Tech Specs
manufacturer part number
120007
manufacturer part number
NPC500
manufacturer part number
CAT002-TWIN
manufacturer part number
24463
manufacturer part number
-
manufacturer part number
7110
item weight
431 g
item weight
481 g
item weight
840 g
item weight
300 g
item weight
-
item weight
300 g
customer reviews
4.5 4.5 out of 5 stars 11, 504 ratings 4.5 out of 5 stars
customer reviews
4.3 4.3 out of 5 stars 649 ratings 4.3 out of 5 stars
customer reviews
4.6 4.6 out of 5 stars 310 ratings 4.6 out of 5 stars
customer reviews
4.3 4.3 out of 5 stars 434 ratings 4.3 out of 5 stars
customer reviews
-
customer reviews
4.3 4.3 out of 5 stars 216 ratings 4.3 out of 5 stars
model
CAT001
model
Clean Cat
model
-
model
Wynns's 24463, Catalytic Converter & Lambda Cleaner, 325 ml
Here are the top 3 recommended products with more information to help you find the right product for you
9.6
1
Cataclean
Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 500ml
9.8Simple to use
9.1worth the money
9.1distance
Why we love it
Boosts fuel efficiency significantly.
Reduces harmful emissions effectively.
Enhances engine performance reliably.
Main highlights
VEHICLE MAINTENANCE > Safe for all engines, Cataclean original 8-in-1 engine cleaning system has been scientifically formulated to help your vehicle engine run better and last longer. Adding Cataclean as part of your regular vehicle maintenance routine to remove carbon build up improves fuel economy, reduce emissions, restores performance and protects catalytic converters
USAGE > Add 500ml of Cataclean fuel additive per 15 litres of fuel every three months for optimum results
REDUCE EMISSIONS > Regular use of Cataclean engine cleaning system can reduce emissions by up to 60% which can help prevent to MOT emissions failures and reduce air pollution
ENGINE PERFORMANCE > Using Cataclean fuel system cleaner restores engine performance, reduces vehicle maintenance costs and reduces fuel consumption, improving MPG fuel efficiency
CLEANS & PROTECTS > Cataclean cleans, restores & protects the fuel tank and lines, fuel injectors, catalytic convertors, diesel particulate filters (DPF), exhaust gas recirculation valves, oxygen sensors, combustion chambers & intake and exhaust valves
Show more
9.3
2
Nitrox
28% Off
Nitrox Catalytic Converter Petrol Cleaner, 500 ml
9.9Simple to use
9.4Aroma
9.3worth the money
Why we love it
Boosts engine performance quickly.
Easy to use, pour into fuel tank.
Helps pass emissions tests effectively.
Main highlights
SAIL THROUGH EMISSIONS TESTS: Use just before your MOT to help you pass emissions tests
RESTORE YOUR ENGINE: Breathe new life into your engine! This multi-purpose formula gets to work instantly, cleaning away harmful carbon and resin deposits from the entire engine, fuel and exhaust system, boosting MPG, and reducing harmful emissions from your car.
PERFORMANCE BOOST: Clean and restore your engine to its original performance
INSTANT EFFECT: Clean Cat's advanced formula cleans your system straight away
EASY USE: Pour straight into your fuel tank and let Clean Cat get to work
Show more
9.2
3
Cataclean
Cataclean Diesel | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 2 x 500ml
9.4worth the money
9.4distance
9.1Simple to use
Why we love it
Improves fuel efficiency significantly.
Reduces harmful emissions effectively.
Protects and cleans engine components.
Main highlights
VEHICLE MAINTENANCE > Safe for all engines, Cataclean original 8-in-1 engine cleaning system has been scientifically formulated to help your vehicle engine run better and last longer. Adding Cataclean as part of your regular vehicle maintenance routine to remove carbon build up improves fuel economy, reduce emissions, restores performance and protects catalytic converters
USAGE > Add 500ml of Cataclean fuel additive per 15 litres of fuel every three months for optimum results
REDUCE EMISSIONS > Regular use of Cataclean engine cleaning system can reduce emissions by up to 60% which can help prevent to MOT emissions failures and reduce air pollution
ENGINE PERFORMANCE > Using Cataclean fuel system cleaner restores engine performance, reduces vehicle maintenance costs and reduces fuel consumption, improving MPG fuel efficiency
CLEANS & PROTECTS > Cataclean cleans, restores & protects the fuel tank and lines, fuel injectors, catalytic convertors, diesel particulate filters (DPF), exhaust gas recirculation valves, oxygen sensors, combustion chambers & intake and exhaust valves
Show more
Our ranking system
The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria. We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. TopChoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.
Features
Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.
Consumer Reviews
We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.
Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
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9.3 
9.6
1Cataclean
Boosts fuel efficiency significantly.
