STP GST59200EN Diesel Injector Cleaner 200 ml,Packaging/label may vary

Great stuff used this week within 24hrs certainly feel the difference

Brilliant! Engine works much better and fuel becomes efficient. Will order again.

Bought due to black smoke emissions. So far fuel economy has improved but still have emission issue. However van has run less than 1k miles since adding so will wait and see.

It really does help, I use it regularly to keep my diesel engine running smooth.

I was advised to get this by my garage for my wife’s now 20 year old diesel Audi. It had failed emissions on one MOT, but that is because she doesn’t use it much for longer trips.Easy to use, the car seems a little quieter, and it sailed through the last MOT.Well worth the money.

Effective, Good Quality

I have used this and similar products on and off over the years and they have definitely worked, unfortunately i have noticed no difference with this product. That does not mean it isnt working, it could just mean my fuel system is clean.

This set was a great price and I already highly rated STP productsI have found an increase in performance/ acceleration and fuel economy when using this on my older 2011 Jaguar XJ X351 with over 100k miles 3 litre V6 diesel engine.Also this keeps the injectors clear of carboning. It can also assist with DPF cleaning as part of the fuel System cleaner.Again I highly recommend this STP set for anyone with large diesel engines but do a lot of short journeys. ( Note that to successfully clean my DPF I need to do about 1 hour driving (30 miles+ at 3000 revs at least once a month).