STP Ultra 5 in 1 Petrol System Cleaner 400ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Easy to use, saw improvement between last tank and end of this tank in acceleration and responsiveness. Improved petrol mileage too

Used for a motorbike. Works as expected and is a great value. Very easy as you only had to pour into the petrol tank and its small so its easy to store.

It’s always good to chuck a cleaner in with the fuel now and then Had no problems Good product

I tried the STP Ultra 5 in 1 Petrol System Cleaner and I am really impressed with the results. I added the 400ml bottle to a full tank as recommended, and after just a few drives I could feel the difference. The engine runs smoother, the idle feels more stable, and acceleration is noticeably more responsive. It also seems to have reduced a bit of hesitation when pulling away. Fuel economy has slightly improved as well – not a massive change, but enough to notice over a couple of tanks. What I like is that it’s a concentrated formula, so one bottle is enough for a full treatment. It gives peace of mind knowing it’s helping to clean injectors, reduce carbon deposits, and protect the fuel system at the same time. Easy to use, good instructions on the bottle, and made in the UK which is a bonus. For the price, I think it’s excellent value – cheaper than a garage clean and helps keep the car maintained between services.

great item great price

Definitely works car running really smoothly. Will buy this again.

So I’ll start by saying that I really don’t know anything about cars. Like almost nothing. So this review is aimed at people that share that similar knowledge (seriously like if I had to scale it; 3 out of 100 in car mechanics knowledge). My car was misfiring every day. Cylinder 4. Apparently, BMW said I needed a new fuel injector. At around £750+ all in, I decided I’d just get a new car (this one was at 155000 miles and 9 years old after all). However, after a bit of googling, I found that a common issue was that the fuel injector’s lines can get clogged up and cause the symptoms my car was dealing with. So I thought I’d try and give it one last push with the BMW before ditching it. Researched the best options and this one came out as one of the best for the money. So I gave it a go. It was super easy to pour in, as the neck is really long and slots right into where you put your petrol in. Couldn’t be simpler. I left it overnight and then went to work. When I started it up, my car continued to misfire just as before (it only did it when I hadn’t driven it for about 8 hours. Once it had been driving a while, I could stop and start to my hearts content). I didn’t notice any difference whatsoever. Other than the fact the fuel gauge had gone up slightly (hadn’t considered that it would basically be adding more fuel, sort of, so bonus!). It wasn’t until the drive home (having done about 15-20 miles total since adding it) that I noticed all of a sudden that the car had become a little smoother to drive. I noticed the acceleration also seemed a lot better. It only stayed like this for a few days though, before getting worse. It continued misfiring on every morning start up and I got fed up with it, so I just sold it and moved on. So, did it work? I guess it did improve the performance slightly for a few days. Maybe it would have done better if my car wasn’t already falling apart, though. Ultimately, for the money, I’d say try it. You’ll sort of get its value in petrol (when topping up your tank) and if you’re just looking to improve the overall performance and health of your car; it probably does that.

I gave this to my son for his mini. It was running rough at 60mph on the motorway run, but it isn't now! Job done! 👍😁

Good product, I used it and took my zen Estilo on a 1200 kms drive, found a mileage improvement of 3 kmpl. With just one bottle. It is recommended you use at least 2-3 bottles of using on an old car (8 yrs and 83K kms - in my case) to get good results. Expect an overall increment of around 5-6 kmpl on highway and around 3kmpl in city ride. It also gave extra knock of power to the old lady,,,,,,, the drive field very smooth and powerful while overtaking others . Would be buying again.

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