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Problem Solver

Find solutions for common car problems

Keep your SCR system crystal-free

Worried about AdBlue ® crystallisation and unexpected SCR system repairs? Keep your system running smoothly by preventing crystal build-up and keeping components clean. With regular use, you’ll avoid costly breakdowns, reduce downtime, and extend the life of your AdBlue® system—so you can drive with confidence every day.

Unlock peak diesel performance

Looking for a way to get the best out of your diesel engine? Imagine a single tank treatment that cleans injectors, EGR, turbo, and DPF, while reducing emissions and smoke. Enjoy smoother performance, better fuel efficiency, and long-lasting results—your engine will thank you for it!

Deep-clean your oil system with the Engine flush

A fresh oil change works best in a clean engine. Before your next service, give your oil system a deep clean—dissolving sludge and freeing sticky components for smoother, healthier performance. Protect your engine from the inside out and enjoy peace of mind every drive.

Clear blockages on the go

Blocked DPFs and high soot emissions can slow you down and lead to expensive repairs. Restore optimal performance by clearing and regenerating your filter on the go—no dismantling required. Keep your maintenance costs low and your journeys worry-free with a cleaner, more efficient engine.

About us

A success story since 1939

The story began in 1939 when Chestien Wynn’s, with a passion for chemistry, developed a formula to prevent friction between metal parts. Now, more than 80 years later, Wynn’s has grown into a global company, offering complete vehicle solutions for fuel, oil, coolant, disinfection and cleaning.

Wynn’s additives are a real alternative to costly mechanical repairs.

Learn more about us

What our clients say

I used this in my brothers diesel van as it had a flat spot on acceleration, and the flat stop is clearing steadily. We have used Wynn's product's for many years because they do the job.. I would recommend this.

Pes

Very good indeed cleaned the DPF and turned off the EML ..highly recommended

Bryan P.

This is the first time I used this, it is brilliant. As soon as I put it in, the car was more quiet and is running real smooth.. I would recommend this to fellow drivers.

Actual Ace

Used this stuff since the late 1970's, it does what it says.

silverbeatle1

Have used Wynn’s products for over 40 years and have never had any problems. I would also recommend the oil additive which I have also used many times.

jamesd6512

Water in a diesel fuel tank can enter via the pump or by condensation. Either way, in very cold weather this water can freeze in the fuel filter. This means your engine may not start.... Not good up in a mountain ! This stuff chemically removes the water allowing to pass through the filter, to be burnt in the engine. Good stuff.

richardhsharker

I find it really makes a big difference to how my 2006 sprinter van runs. Loads more power and it sounds smoother and quieter and way less smoke from the exhaust system (pretty much zero!), it’s really good and well worth it. Will keep using this indefinitely.

paintings64

News

Drive further and longer: Diesel additives explained

Fuel economy and engine longevity are major concerns for all vehicle owners. Diesel additives now play an essential role in optimising fuel performance, protecting the engine and meeting increasing environmental requirements. But what exactly is an additive? Additives are simply special products that are added to fuel to help it perform better in the engine or to anticipate and treat a speci…

November 13, 2025