Nitrox +10 Clean Speed Super Petrol Additive 500ml Fuel Treatment Cleaner Engine Injector All In One System Cleaning Remove Carbon Gum And Dirt Lubricate Cylinder Heads Boost BHP Reduce Emissions

The warning light for the catalytic converter had been on for a while.A couple of days after pouring this gear into the fuel tank,and off went the light,so I'm assuming this did it's job

My car failed MOT due to exhaust emissions but it passed after going for a re-test despite the exhaust blowing and gases escaping.

I bought this on a whim to hopefully avoid having to replace my catalytic converter and I am very glad I did. It's super simple and easy to do and the results after a good run were very noticeable. Great product for the price, would definitely recommend!

Very nice

To tell u the truth I didn't notice anything that help my car,catclean is much better

Used this on my old Transit Van to bring the emissions down for its MOT. Worked a treat and emissions were well within the range. Will use again.

Emptied this into my fuel tank when topping up a couple of weeks ago. At least it doesn't seem to have any detrimental effects.Could be a placebo effect but the engine does appear to run better and is more responsive.Whether it does as intended, who knows? Hopefully it does.

Hard to say if there was a dramatic improvement as I put this in a recently purchased car. Certainly helped the car idle better