Ultra 5 in 1

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.

Arrived quickly from Amazon, we'll packaged. Put this in a full tank on my 2015 1.2 petrol DS3 w/103k on the clock about 2 weeks ago and so far looks good. My fuel gauge is digital and each quarter is split into 3 blocks, since I bought the car 2 1/2yrs ago I've been gauging fuel use by using the trip computer, trip 1 for each block and trip 2 for full tank, each block was going after about 28 miles, 30 at a push, so each quarter tank gave about 84ish miles, so a full tank was returning about 350 miles, my journeys are very much the same month to month, home-work-home, shopping or popping to MILs. Since I've put this in 2 weeks ago each block in the quarter of the fuel guage has been going off after 35 miles, so 105 per quarter so possibly signifying an increase of 70 miles or so for the full tank.Now in February I did have new tyres all round and a wheel alignment so the new fuel economy could be partly down to that but I have felt that the throttle response does feel much better, I've got this on subscription so planning to put this in my car and the wife's every other month and see how it goes but at first impressions it looks to be doing something positive

I use this product a lot for my various cars, especially if they are not being used too often. and will double dose if a car will be stood for a month or so.I find it really works, providing crisper engine response, slightly increase power / performance - acceleration and better engine idling and at all rev's - speeds.I'd have given it a 5 Star rating if it was around the £8.00 GBP mark

Perhaps it’s snake oil? Car still going though.

My Puma was running a bit rough and seemed to lack power, so I thought I'd give this a go. I've used Redex in the past but I thought I needed something a bit stronger. It had an effect pretty much straight away. For the next couple of drives, the engine seemed actually worse than before, but I assume this was a combination of the gunk being cleaned out and the engine adjusting to the fuel's octane rating being changed by the additive. After those couple of drives, the engine is back to how it should be, it's running smoother, take off is immediate and even fuel economy seems a little better. I'll definitely use this again, but probably every 6 months, instead of waiting for the engine to get gunked up again.

Time will tell

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

Slight improvement in the running of the car.

Really great product positive effect on engine sound and performance 👌

Impeccable 👍

Limpia el sistema de inyección. Cada vez que lo uso consume menos. Tiene un olor muy fuerte y es muy contaminante. Los usos dos veces al año de manera habitual.

Lo estoy usando 2 veces al año tras comprobar que cum la primera aplicación bajó el consumo de 4.7 a 4.5 l/100 kmCompré este por venir especificado "hybrid compatible"

Great product