Wynn's Crystal Clean & Protect - Additive for Use with AdBlue - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml

Works well. Better to prevent then to fix.

I bought this to try and cure an AdBlu error on my car. It didn’t cure the fault, but I hope it will prevent it happening again in the future.

I had an engine fault code regarding my Adblue system. Car said I had about 600 miles before car won’t turn on. Very scary. Garages told me it could be very expensive repair. So I used this stuff hoping that my problems would get resolved.And to my surprise it did.Emptied it in my Adblue tank.. drove for around 70 miles and job was a good one.Turned out to be a blocked def injector which this stuff cleaned up. And now no more fault codes as it went away on its own. I will keep using this Crystal Clean & Protect on every Adblue refill.

Great product and service 👌

Recently been getting come adblue faults in my 1.5 bluehdi, had a few codes that came up with urea pressure and for the adblue Injector.I first cleaned the injector upon inspection it looked like nothing had been coming out.So it was either the pump in the tank as live data showed low pressure or the adblue could have crystallised.So rather than spending thousands on the adblue tank as it has everything inside it I thought I’ll give this wynns treated ago!Within 5 minutes of this added to my adblue tank my live data showed it had pressure and urea injection was being injected.Removed fault codes and it’s all fixed!My first bottle I got from a local store but after I realised it had fixed the problem I then wanted to buy another but all shops had sold out and Amazon had availability for Sunday delivery (was Friday when looking) so purchased another bottle but from Amazon as I want to make sure it’s got another treatment in the tank and low and behold Amazon delivery it next day on Saturday which I was hoping for so grats to Amazon for fulfilling this order and getting my my order earlier than expected.If you have similar faults it’s definitely worth buying this just in case you have the same problem and put it in your adblue tank and test before you even go to a garage! It will safe you big money if this is your problem.They say to add 1 of these when you fill your adblue up to prevent these faults and it also cleans so multiple functionally.

Now I don’t know if this is working or not but it came quick and very well packaged. I used it in my car and before now I’ve had the adblu light come on but since having it in the tank and gone through the system the light hasn’t come back on so hopefully it has helped fix it. The last abundant cost over £1200 so great value for money in my eyes

It's difficult to say if this works well unless tested in a lab but the idea makes sense so worth using just in case

Does what it says.Why did you choose this product over others?:Trusted Brand.Ease of use:Easy.