STP Power Booster 200 ml, Boosts Octane and Cleans Fuel Intake System, Reduces Fuel Consumption, Mechanical Car Cleaning Products, Made in the UK

My old 2009 Toyota Yaris was starting to feel a bit sluggish (it has a small engine, so it's not quick in the first place)... I was going to replace the spark plugs, but thought I'd try this stuff first. The results are pretty good with the car becoming noticeably more responsive after 100 miles or so with this stuff in the fuel tank. I let the tank run down ito the red to get the most out of it (around 400 miles total).Does the job and the car is noticeably more responsive. Recommended for the price.

I have a 53 plate 1.8 astra coupe with 103000 miles on it that on the whole runs fairly well and seems to have been well cared for mechanically over the years, it generally gives around 350-370miles (maybe even a little more on long slow motorway runs). Recently it has been feeling a little less responsive, nothing major but equally noticable, it felt like I was having to work the car a little more than normal so I thought as it is over 100000 miles it couldnt hurt to give this kind of product a try. After the first full tank (with the cleaner in) It did feel like it's less hesitant and a little more eager to pull at low revs in high gears, again, nothing really impressive but it definitely improved things a little. I will also add that it achieved 365miles from the tank and I didnt feel like I had worked that hard to achieve it, so it would seem that while it didnt massively improve my economy it did make it easier to achieve good mpg and I am curious how it will do with a long economic run.In sumary, I think the best approach to have when using this stuff is not to expect mirracles, you may use this and get lucky, your car may be heavily fouled up and you will see much better results than I did or the problem you have could be a lot more major and mechanically based than a bit of fouling of injectors etc - I thought it was worth a try as my car was just a little sluggish and I am very hapy with the result, to the degree that I am contemplating using it in my other (much better) car because it sees to have helped this car.

Works well as we could see the result as had just polished the crome end pipe on exhaust and after a decent run had to do again.

My misfire always showed as soon as the auto-choke went off which screamed partial injector blockage. Added this to a full tank and at 5 miles the difference was becoming apparent but by 20 mike's it was like having a new engine. I presume it wasn't just the one injector though it was obviously the worst if the four. Now they are all cleaner and getting cleaner with every mile. The difference beggars belief.

Impossible to ascertain the efficacy of this product, but, as a cleaner for the fuel pathway, I've always relied on this long-standing brand to deliver. And, coincidence or not, I've never experienced problems in the fuel system of my cars.For the small price, to use every so often, it's an easy "yes" from me...

Used it but don't really notice any difference, that's not to say it doesn't work as my car was running well to start with

These things hardly work using them just once.I was skeptical but I treat this as part of preventative maintenance.Sometimes I can smell this additive in the exhaust gas. Gives it an unpleasant sharp smell.Would I buy it again? Why not. It's cheap, especially for older cars, it is recommended.-----------------------UPDATEThe injectors clearly work better. The car drives way better, I can feel more power.5 stars, it really works.

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.