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

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.

Used this over several years in different cars and always found that after a few miles the engine does appear to run smoother and acceleration is more responsive. Its an additive which does as it says on the bottle and good value for money.

I recently used the STP Petrol Injector Cleaner in my car, and the difference in performance was noticeable almost immediately. This product is perfect for anyone looking to maintain their vehicle’s engine health and improve fuel efficiency. Performance: After using just one bottle in a full tank, I noticed smoother acceleration and improved throttle response. The engine felt more responsive, and the car idled more smoothly than before. It’s great for cleaning out those hard-to-reach parts of the fuel system that can get clogged over time. Fuel Efficiency: Over the next few fill-ups, I saw a slight improvement in my fuel consumption. While the difference wasn’t huge, every little bit counts, especially with rising fuel prices. This cleaner seems to help maintain the engine’s performance, which in turn keeps fuel efficiency up. Ease of Use: Using this cleaner couldn’t be simpler. Just pour the 200 ml bottle into your fuel tank when it’s full, and let it do the work as you drive. The instructions are clear, and there’s no need for any special tools or equipment. It’s a quick, hassle-free way to keep your fuel injectors clean.

The engine seems to work better. More powerful. It seems to accelerate better.

Great product noticed it more on my 2nd bottle engine runs more smoothly

Did it's job, obviously each car is different and I know mine needed a clean out, but even so I'm surprised I've gained 2mpg since using the cleaner . Would recommend as a system cleaner.

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.

Excellent product and easy to use