Wynn's Extreme Diesel System Cleaner - Deep Cleaning Engine Treatment - Restores Fuel Economy & Reduces Emissions - Prevents Turbo, EGR Valve & DPF Issues - 325ml

Wynn’s Extreme Diesel System Cleaner is an excellent product that really delivers results. After adding it to the tank, the engine feels smoother, quieter, and more responsive within a short time. It’s particularly good for improving fuel economy and restoring lost performance in high-mileage diesel engines. The formula works through the entire fuel system, cleaning injectors and removing carbon build-up effectively. It’s easy to use just pour it in before filling up and there’s no smoke or harsh odour like some additives. A great maintenance product that helps keep the engine running at its best. Ideal for anyone who wants to maintain performance and prevent costly issues down the line.

This is a good product. I have definitely seen an overall improvement of the engine performance. Better starting, idle, smoothness and economy. I'm not a mechanic, but it seems to have made a definite improvement to how the engine now runs. Followed the directions on the bottle, very easy to use. Will be using again.

Works fine

I had an old diesel vehicle and the EWL started randomly illuminating. A quick check of the codes suggested a DPF or diesel system sensor type issue. A bottle of this (and Wynn's DPF version) seemed to resolve the issue. I now add a bottle every few tanks of fuel. Resolution may be coincidental, but seems an ok product and way cheaper than a large garage bill. Probably worth a try?

If I could give more than 5* I would. I have a 2016 suzuki sx4 110k Miles and had the dreaded engine warning light for EGR open circuit and high resistance where no amount of italian tune up would fix it. I've used other products that clean the engine and jets, multiple tanks later it did a bit to clear it but still the light returned and the engine judders continued. Used this and in under about 1/4 of a tank it cleared the code, it hasnt come back, just one motorway trip for 30ish miles and the engine runs great. To clean the EGR Valve, £250, replacement valve, £90-£500 Aftermarket vs OEM, this was £7, didnt require me to book it in, didnt need me to get my hands dirty, just super simple to use, pour it into the tank, drive it for a bit it and has completely sorted it. It also added 2mpg which is a nice bonus. I would suggest if you are to use it (while I dont know if it does anything to help or hinder) a long motorway drive and maybe a gear lower than normal might help, im not an expert, but thats what I did.

Highly recommended as the performance is great Easy to use

nice price

Great stuff, keeps the turbo clean, had a problem with turbo gate sticking, this cured it