Cataclean Petrol | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 500ml

I've been putting this in my tank every three months for a year and I have to say it works really well. My mpg is higher and my emmissions have lowered. All in all a good product.

Works very well

Effective for cleaning a petrol vehicle system

Cataclean always does an excellent job at cleaning the whole injectors, valves, upper cylinders and exhaust/catalytic converter system. Easy to use, just add to a tank of fuel. Improves performance and fuel economy.

Great product.

Great additive.. use regularly

I used it as instructed and no change to the issues with my 02 sensors improvement to performance or other noticeable difference.

Always use this great fuel system cleaner. Does what it should and not expensive for good results.

Had the P0420 code pop up - and was prepared to exchange the two catalytic converters (since the truck has over 280,000 kms on the clock). As it just came out of the shop, where a coolant leak into the engine had been fixed, and I read that just a little coolant going through the engine into the exhaust system can cause such cat efficiency errors, I figured giving Cataclean a shot might be worth it, to save a rather costly cat repair (especially in Germany, where getting parts and finding a shop able to work on US cars are always a little challenge). So I ordered Cataclean here (to my surprise it was available in Germany - I knew it from the US before) and followed the instructions: gas tank was just under 1/4 full anyway, so I filled in the entire bottle, and then drove the truck on the freeway (stadt autobahn) for a bunch of miles to and fro, while staying out of overdrive (fairly high revs are recommended for this, but in a V8 it is hard to push over 2,000 rpms). I had expected / hoped for an immediate result, but as I arrived back home, the 'check engine' light was still on -- and I thought, yeah well, it was worth a try. Then corona / covid19 struck, and all my cars stood for several weeks. When I finally got to move the truck again after 4+ weeks, voila! -- the light was gone, and the code cleared itself! Cat efficiency was back to normal. Apparently the effect of Cataclean had to "settle in" for a while. And: the light stayed off; I am writing this review 3 months (17 JUN) after the purchase (13 MAR) and application. It was definitely worthwhile to give it a try.

Ho risolto un problema legato al catalizzatore e sonda lambda, sono molto soddisfatto e incredulo 👍

El producto, extraordinario, lo he notado en el motor, va mucho mejor. He pasado la ITV a la primera, reducción de gases contaminantes. Lo recomiendo 100x100

Très satisfait

Followed instructions to the letter but disappointingly the engine light is still on (o2 sensor error). May need to just cough up for the garage!