10 Best Catalytic Converter Cleaners 2025 in the UK

The Cataclean Hybrid is a fuel additive and exhaust cleaner designed to maintain your vehicle’s engine and exhaust system. With its universal compatibility, it is safe for all engines, making it a versatile choice for various vehicle types. It excels in its cleaning strength, as it targets carbon build-up in multiple components like the catalytic converter, injectors, and exhaust system, which helps in reducing emissions significantly, up to 60%. This feature can be particularly beneficial for those looking to pass MOT emissions tests or simply reduce their vehicle's environmental footprint.

Ease of use is another strong point for Cataclean. The product is straightforward to apply; just add 500ml per 15 litres of fuel every three months. This means it doesn't require frequent application, which can be convenient for regular vehicle maintenance routines. However, remembering to use it quarterly might be a minor drawback for some users who prefer less frequent maintenance.

In terms of environmental impact, reducing emissions and improving fuel efficiency makes Cataclean an environmentally considerate choice. This could appeal to eco-conscious drivers looking to minimize their vehicle’s carbon footprint. On the downside, while the product is marketed as reducing maintenance costs and increasing fuel efficiency, individual results can vary depending on the vehicle's condition and usage patterns. Cataclean Hybrid suits those who want a comprehensive solution for engine and exhaust maintenance without the hassle of frequent application. Its proven effectiveness in emission reduction and fuel efficiency enhancement makes it a solid option for anyone looking to keep their vehicle running smoothly and environmentally friendly.

Cataclean Petrol is a well-rounded fuel and exhaust cleaner that caters to the needs of drivers looking to maintain their vehicle's engine and catalytic converter. The product is compatible with all types of engines, making it versatile for various vehicles. Its 8-in-1 system aims to enhance performance by cleaning and protecting multiple components including fuel injectors, catalytic converters, and more. This product is particularly beneficial for those looking to improve fuel efficiency and reduce emissions, with claims of emission reduction by up to 60%, which can be a significant advantage for pre-MOT checks.

In terms of ease of use, Cataclean is straightforward, requiring only a simple addition to the fuel tank every three months. This makes it an accessible option for regular vehicle maintenance without needing expert mechanical skills. However, the frequency of use might be higher compared to some other products, which could be a downside for individuals seeking a more long-term solution without the need for regular application.

Environmentally, Cataclean promotes reduced emissions, contributing positively to less air pollution, which is an appealing feature for eco-conscious users. The product is non-toxic, adding to its safety profile for both users and the environment. Some potential drawbacks include the need for consistent usage to maintain its benefits, and it might not be the most cost-effective option for users who prefer more infrequent treatments. Additionally, availability might be limited outside mainland UK, which could be a consideration for international customers. Despite these concerns, with high customer ratings and a strong performance profile, Cataclean Petrol is a solid choice for those focused on maintaining and improving vehicle engine health and efficiency.

The Cataclean Diesel Fuel & Exhaust Cleaner is designed to be an all-encompassing solution for maintaining and improving the performance of vehicle engines. It's compatible with all engine types, making it versatile for various users. The cleaning strength is robust, targeting crucial components such as the fuel tank, injectors, and catalytic converters, among others. This comprehensive cleaning system helps reduce carbon build-up, which can lead to improved fuel economy and engine performance, as well as reduced emissions—by as much as 60%, according to the product claims. This makes it a beneficial product for those seeking to pass emissions tests and contribute to reduced air pollution.

Ease of use is highlighted by the simple addition of 500ml to your fuel tank every three months, which aligns with regular vehicle maintenance routines without causing much hassle. The frequency of use, every three months, is reasonable and ensures ongoing benefits without being overly demanding. In terms of environmental impact, its ability to significantly lower emissions is a positive aspect. However, the product is not without its drawbacks. It's only available for delivery within mainland UK, which limits accessibility for some potential users. Additionally, the specific environmental benefits rely on regular use, which might not suit those looking for a one-time solution.

Its weight and dimensions might make handling slightly cumbersome for some. The Cataclean Diesel Fuel & Exhaust Cleaner is a strong contender for those looking to maintain their vehicle’s performance and reduce emissions over time.