Cataclean Reviews

Developed in 1995, Cataclean is now being used and trusted by worldwide car owners from Europe, Asia, Africa and the US. Cataclean products successfully tried and tested by a range of organisations worldwide, from the American Automobile Association and Metro Taxi in the United Arab Emirates (UAE) through to Lancashire Police and Veolia in the UK. Crucially, our products have also had many testimonials from industry experts, as well as customers, including Car Mechanics and Professional Mechanics magazine. Here are just small parts of Cataclean users’ reviews.

Alex,  Amazon /media/pages/library/amazonstars.png

Great product, I use this on both my cars, useful to add on the day of MOT test (*Ministry of Transport is an annual test of vehicle safety, roadworthiness aspects and exhaust emissions required in the United Kingdom) and give the car a good drive before having emissions tested, can be used every few months to help keep fuel system clean.

Jess, Amazon /media/pages/library/amazonstars.png

At first I was skeptical about using this product but I figured I’d try it first before taking my car to a mechanic. Had the p0420 and p0430 code when the CEL came on. Use this product with about 4 gallons of gas and drove until I was almost out of gas. Filled up my car and reset my cars computer. Drove my car for the next couple of days and no CEL. I checked if my computer reset after driving and it did. Took it to smog and passed no problem. I’m going to use this product on my other 2 cars regularly now. I was very impressed.

Cataclean clear P0420 error code
Cataclean review better performance fc

Mike, Amazon /media/pages/library/amazonstars.png

Purchased this after reading a lot of reviews and decided to use it. It certainly seems to have improved the performance in the engine,from ticking over smoothly to a feeling that the car is smoother through the gears. It went in for an MOT, a few days after adding it and the emissions test was no problem, and my car is 15 years old! I will definitely use it again.

Reduces Emissions, Restore Engine Performance & Improve Fuel Economy! Get Cataclean Today!

Tom, Email

I have a TDI diesel. On the VCDS program, I observed that actual turbo boost, was drastically lagging behind specified boost. Actual boost seemed fixed at 989mlb. After putting two bottles of Cataclean in 1/2 tank of fuel, and running the car for about half an hour, I watched actual boost gradually increase to 1020mlb. Then after letting the car set a day or two, actual boost was reaching specified, only with a bit if lag. Finally, I tested exhaust back pressure, and it was so low it didn’t even register on the gauge. Additionally, the car is running as smooth and quietly, as the day I bought it new. Thanks for a truly great product!!

SueB, Amazon /media/pages/library/amazonstars.png

My 1997 Toyota Avalon has had the check engine light on for years. Every two years when it comes time to renew with smog certification, I tell myself this time I will donate the car to charity. Then I think of the benefit of a fully paid for car as a fallback and decide to once again go to cat a clean. Following the instructions has extended my ownership for six years now. The dealer wants $3000 for parts and installation for my car. With cat a clean I have to turn off the code myself (I bought a code reader for about US$13 from Amazon). The light remains off for about three months and the smog test results show everything not only within limits but at the low end of the allowable quantities. In California (Maybe all states the car has to be driven enough to reset the code monitor system parameters to show that you didn’t turn off the light just before the test.) My smog test guy said at least 60-80 miles. I have driven over 120 miles before going in or a test. It has worked for me 3 times over six years. Well worth the money.

Jja2643, Amazon /media/pages/library/amazonstars.png

Spot on as always, highly recommended for any vehicle every 3 months. If you have a smokey diesel or failing MOT emissions (petrol or diesel version) this will get you through.

Colin Wolfall, Email

2001 ford transit t280 100 swb 153k
I have owned my van for 8 years, because of the age of it naturally it has always had issues with emissions fumes and the DPF. Over the years I have purchased a few different injector cleaning products to reduce the smoke, most of them have been the cheaper end of the product scale as I was told they all pretty much did the same job at £6-£10 range. As they all had little to no noticeable impact on emissions, I decided this month to purchase Cataclean. At £16.99 per bottle, not the cheapest in the range but I thought it was worth trying as the other products haven’t worked. My 1st thoughts when I picked up a bottle of cataclean was how much more liquid you are getting for your money compared to the cheaper products. The instructions are not measured in percentages of liquid to fuel or how many millimetres per litre to have to add in to your tank… With cataclean you just simply add the whole bottle to 1/4 of a tank of fuel and your done! I shall repeat every 3 months as they suggest. Within the 1st 50 miles of driving there is a noticeable improvement in engine performance for such an old van! Fuel efficiency has gone up and the dreaded blue smoke has all but vanished!! Like with most things in life you get what you pay for, it’s Cataclean every time for me from now on, Great work guys ! 

Adam Rosenblum, American review  /media/pages/library/amazonstars.png

It works!

I had a check engine light on, which was a pretty significant bummer since I had to get an emissions test to renew my registration; in my state, a check engine light is an auto-fail on emissions tests. Bought an OBD meter (also a great investment), said it was a catalytic converter issue – I cleared the code multiple times, but it kept coming back. At the prospect of a US$700+ repair/replacement, I decided to try Cataclean instead.

I did it mostly by the instructions, but also incorporated the recommendation of a commenter (may have been on a different website) – I put it in right before I got on the highway. It was about 9 pm, so it was mostly empty. – I got into the left lane, and continuously revved the engine to the highest RPM’s I could, then let it settle down. Did that for about 20 miles. – When I got home, I used my OBD meter to clear my codes. Drove for about 50 miles before I went in to get the emissions test, passed with flying colors. I’ve driven 500+ miles since, code has not come back. Definitely recommend this for anyone who knows the engine is throwing a catalytic converter code, before taking it to the mechanic. Between this and the OBD meter I bought, I saved probably about US$1k vs taking it to the shop.

Emerson Buckingham, Email

“My old truck went for its MOT last week and my fear of it failing with the new emissions went with it. I added Cataclean a week before the MOT.
Well I needn’t have worried. It not only passed but the emissions were far lower than last year when I looked back at last year’s certificate. 
Last year I hadn’t used Cataclean yet but using it for the last 12 months as directed it has made my L200 so much better on emissions than even my mechanic expected. So another glowing review for a product that clearly works not only on fuel consumption but on the emissions as you say. Never had any doubt 😁

Nick Reynolds, Handwritten letter

“I normally put in Shell High Octane diesel into my Peugeot Expert before a council taxi test, followed by Cataclean. I did not put Shell in this time, but no matter, a bottle of Cataclean Diesel, a run down the road for 10 minutes and got a nice cloud of ‘black smoke’, test emissions results ‘very good – nearly insignificant’, from a tough tester. Cataclean – bloody marvellous!

All Wheels Service Centre, Thailand

A customer’s car came in to rectify a drop in the compression ratio, so we asked customer for permission to test Cataclean on the vehicle. Initially we applied Cataclean then ran at idle, we followed this with a shorter period at a higher speed, then left the vehicle for 1 hour. We then opened up the cylinder head to check the results. Normally, the combustion chamber and cylinder head will be covered with stubborn soot/carbon deposits, which we have to scrub continuously to remove. After Cataclean we simply had to wipe off with a rag…Amazing!!! We love it!.

Philip Balmer, Handwritten letter

“I just wanted to write in and say how impressed I am with Cataclean! My car is a Volvo S60 D5 and recently it had been feeling sluggish and although I had tried a couple of other cleaners, they didn’t seem to make much of a difference. So I thought I would give Cataclean a go before I took it to the garage and I’m so pleased it did as it has made the car go as well as it used to almost immediately. I still have no idea what was wrong with it but whatever it was Cataclean fixed it. 

Ian Barkley  /media/pages/library/amazonstars.png

My Saab 9 e 1.9 tid was running badly … Lumpy and the mpg had dropped to 25.3!! Had wafts of black smoke from exhaust. 

Got some Cataclean and emptied it into my tank. Then I took the car out for a drive. I could tell it was smoother after about twenty miles. Got home and checked the mpg .. Up to 43 which it where it normally is. The power is back and it is showing me 44 mpg now, no black smoke and smooth running. I am very pleased and will order another for the three month treatment as recommended.

Gemma Coombs  /media/pages/library/amazonstars.png

What an amazing product . My car failed it’s MOT due to emmissions. I was told it would be cheaper to scrap the vehicle rather than get it fixed. I bought this product used it and took my car for a good run . I then went to another garage for a second opinion & it passed that mot without any problems. Would definitely recommend buying this product.

Gail Smith  /media/pages/library/amazonstars.png

I am a courier and bought my latest van last November. I run it 6 days a week for an average of 8 hours a day and in that period I might turn it off 5 or 6 times so you can imagine how hard the engine is working. The van has been chucking out thick black smoke whenever you rev it a little to hard so I thought I’d give this product a go ( last van cost me two new converters ) I added the cataclean this morning and just left the van to idle for 20 minutes as I won’t get round my routes on a quarter of a tank. Ran the van as normal all day and when I got back to the depot in the evening I put her in neutral and gave her a bit of a rev… and … NO SIGN OF ANY BLACK SMOKE!! excellent product which I would recommend all day long.

kirk martin  /media/pages/library/amazonstars.png


I was skeptical. My 99 Jeep Cherokee has had a check engine light on for over a year, the code indicate that there was a problem with the catalytic converter, not wanting to take it to the dealer for a lot of $ I decided to try this additive. I followed the direction saying to add with tank half full of gas then drive 10 -20 miles after reseting the code. I held my breath thinking the light would pop back on at any time, but now after several months and thousands of miles, NO CHECK ENGINE LIGHT !!! 

JOHN FREEMAN  /media/pages/library/amazonstars.png

Does what it says on the bottle. I drive an 11 year old Skoda 14 TDI with a PD diesel engine fitted to it. I have used this stuff for near on 3 years. I personally believe it is a top quality product and has helped improve the performance of my car. I was travelling less than 5000 miles per year and was getting worried the DPF filter would eventually become problematic. Not so, when Cataclean is used. Just run the fuel level in your tank down till it reaches the red mark, then add a bottle of Cataclean. Give your car a blast up the motorway then fill it up. Never had a problem with an MOT smoke test. I use every 4 months.

Clean, Restore & Protect Your Vehicle's Fuel And Exhaust System. Get Cataclean Today!


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