STP Diesel Treatment 200 ml, Keeps your Fuel System Clean, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK, Black/Blue

Good stuff

My husband was recommended to use this now and then; he hasn’t looked back; he says that this has vastly helped with the performance of his van.

This was recommended by my mechanic for my used vehicle along with “not using cheap fuel” as it leaves more impurities in the engine. Difficult to assess any results, positive or otherwise but I’d say there’s some improvement. Update... Although I can't fault the recommendation to use this product as any product that helps clean the engine can't be a bad thing but the smokey engine got worse putting a permanent Coil light on my dashboard. That was only when my mechanic was able to pinpoint the cause. Not necessarily blaming the mechanic as these faults can be difficult to locate unless it triggers a management light. Smokey engine has since been cleared and engine is running well. Maybe the product has help in the engine running better, I'm guessing it has.

Got to be honest I was a little sceptical whether this stuff would actually work, and for little over a fiver I thought why not, had my Citroen Nemo serviced just over a week ago and noticed it being a little more Smokey than it should be, so thought I’d give this stuff a go and have to say I only put 30ml in maybe a little over 1/4 of a tank and give it a little 10 minute run and I have to say, pretty much smokeless, the test will be in the morning on a cold start! But for me it’s a big 👍🏽

Ford Mondeo 09 130k miles. Rough cold start. Excessive white smoke. Poor acceleration. No regrets at all. I'm back loving my car again. Star immediately in cold weather. Very minimum white smoke. Excellent acceleration. Job done 👍. Just to mention I used it mixed with diesel particulate filter cleaner.

I have used this fuel treatment before and always been happy with the results.

Don't usually believe in these 'snake oil' treatments, but,,,,had to have an injector replaced on my 60 plate Mazda 3, 70k (ouch money). Even after re-mapping there was a definite injector knock from (hopefully) one of the other injectors. Tried this diesel treatment and either i have gone deaf (possibility) or it works! Engine definitely less 'knocky' at startup and under light acceleration, which is when the injector knock was noticeable. Used three times now and happy with the results.

I've always used sap treatments and don't have many problems with doing short runs and things clogging up since I've started using them

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