10 bestCatalytic Converter Cleanersof May 2025
112M consumers helped this year.
1
Cataclean Hybrid | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 2 x 500ml
Cataclean
9.9
2
Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 500ml
Cataclean
9.8
3
Cataclean Diesel Fuel & Exhaust Cleaner Catalytic Converter Valve & Injector Cleaner 500ml
Cataclean
9.7
4
Wynn's Diesel Turbo Cleaner - Removes Carbon Build-Up & Frees Sticking Vanes - Cleans Diesel Oxidation Catalyst & EGR Valve - Restores Engine Power & Reduces Soot Emissions - 500ml
Wynn's
9.4
5
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
Cataclean
9.1
OtherUp to 4% off
Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 4 x 500ml
Motul PETROL CATALYST CLEANER
Cataclean Powershot Bike | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Emissions Reducer | 250ml
Cataclean Workshop | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 5L
6
Wynn's Catalytic Converter & Lambda Sensor Cleaner - Optimises Efficiency, Reduces Emissions & Restores Engine Performance - Ideal for Petrol & Hybrid Engines - 325ml
Wynn's
8.8
7
Liqui Moly 7110 - Fuel Additive, uncoloured
Liqui Moly
8.5
8
Nitrox Catalytic Converter Diesel Cleaner, 500 ml
Nitrox
8.3
11% off
9
LIQUI MOLY 8931 Catalytic-System Cleaner, uncoloured
Liqui Moly
8.0
10
Cataclean Diesel | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 4 x 500ml
Cataclean
7.7
A Guide to Selecting the Best Catalytic Converter Cleaners
Choosing the right catalytic converter cleaner can help maintain your vehicle's performance and reduce emissions. Catalytic converter cleaners are designed to clean the catalytic converter, oxygen sensors, and the entire exhaust system. This can help improve fuel efficiency, reduce emissions, and extend the life of your catalytic converter. When selecting a catalytic converter cleaner, it's important to consider several key specifications to ensure you pick the best product for your needs.
Compatibility
Compatibility refers to whether the catalytic converter cleaner is suitable for your specific vehicle type and fuel system. This is important because using an incompatible cleaner can cause damage to your vehicle. Cleaners are often formulated for specific types of engines, such as gasoline or diesel, and may also be designed for certain vehicle makes and models. To pick the right one, check your vehicle's manual or consult with a professional to ensure the cleaner is compatible with your engine type and fuel system.
Cleaning Strength
Cleaning strength indicates how effectively the cleaner can remove carbon deposits and other contaminants from the catalytic converter and exhaust system. This is important because a stronger cleaner can more effectively restore your vehicle's performance and reduce emissions. Cleaners can be categorized into mild, moderate, and strong based on their cleaning strength. If your vehicle has significant buildup or has failed an emissions test, a stronger cleaner may be necessary. For regular maintenance, a mild or moderate cleaner may suffice.
Ease of Use
Ease of use refers to how simple it is to apply the catalytic converter cleaner. This is important because a product that is easy to use can save you time and effort. Some cleaners require you to add them directly to the fuel tank, while others may need to be sprayed into the intake system. To pick the right one, consider your comfort level with performing vehicle maintenance and choose a product that matches your skill set. If you prefer a straightforward application, a cleaner that is added to the fuel tank may be the best option.
Frequency of Use
Frequency of use indicates how often you need to use the catalytic converter cleaner to maintain optimal performance. This is important because it can affect the overall cost and convenience of using the product. Some cleaners are designed for one-time use, while others may need to be used regularly, such as every few thousand miles. To pick the right one, consider your driving habits and maintenance schedule. If you drive frequently or have an older vehicle, a cleaner that requires regular use may be beneficial. For occasional use, a one-time cleaner may be more suitable.
Environmental Impact
Environmental impact refers to how eco-friendly the catalytic converter cleaner is. This is important because using a cleaner with a lower environmental impact can help reduce your carbon footprint. Some cleaners are formulated with biodegradable ingredients and are less harmful to the environment. To pick the right one, look for products that are labeled as environmentally friendly or have certifications indicating they meet certain environmental standards. If reducing your environmental impact is a priority, choose a cleaner with a lower environmental impact.
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