Ultra 5 in 1 Petrol System Cleaner 400ml, Enhances Fuel Economy

I’ve now used STP Ultra 5 in 1 Petrol System Cleaner across three different vehicles and have been genuinely impressed with the results. All three engines appear to run smoothly, with noticeably improved responsiveness and refinement, particularly under acceleration. It’s incredibly easy to use and offers a convenient way to maintain the fuel system. Excellent value for money and a worthwhile addition to routine vehicle maintenance. Highly recommended!

Works well and 2nd time buying. I can log more mpg after using it and I am sure it's doing its cleaning things inside the engine which I can't see. I use it every 3000 miles rather than the recommended 4000 as I use the cheaper supermarket petrol rather than the branded petrol with more cleaning additives already added.

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

I feel this gives my car much needed refresh. I believe I can feel the difference in power and mpg so I buy this brand every time

My son's Citroen DS3 started smoking a lot a few months back. I did all the checks, i.e. checked for coolant loss, oil loss, head gasket (water in oil causing mayo-like substance and Co2 gasses check), etc. All appeared clear, but the white smoking was getting worse and more dense. So took it to 2 different garages. First one did a diagnostic check and all the same checks I did and said it was an O2 sensor which I had changed. Still, the problem persisted. Tried a different garage, this time, based on my own research I suggested it might be the fuel injectors. Again, another diagnostic later and further checks later, they said not likely to be fuel injectors and it would need a much deeper investigation. As I was convinced it might be the fuel injectors, I decided to give this product a go. Added to a full tank and at first, it didn't seem to make any difference, not even more smokey as the instructions suggested it would be. However, 3-4 days later, the smoke appeared to be a lot less. But I didn't want to get my hopes too high. But almost 2 weeks later now, and there's no smoke 🥳 It flew through a recent MOT also. I plan to use the product maybe once more before the year ends. But for me, this product worked a treat and probably saved me a small fortune in further garage costs.

I always use this every now and then. Car seems to drive better with this in a tank of fuel. I add it once or twice per year if I remember to order some!

This is very good, to put in your tank for your petrol, it does give you extra mileage, Recommend this item and the seller

Did not notice any difference to car performance.

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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 km Compré este por venir especificado "hybrid compatible"