STPStart Stop Petrol Engine Cleaner 200 ml, Cleans and Protects Key Engine Components, Reduces Fuel Consumption and Emissions, Mechanical Car Cleaning Products, Made in the UKCompact by Design (Certified by Amazon)

have one auto delivered every 3 months becaue i dont do the milage. saves having to remember

Time will tell

I assume this works well.. haven’t had any issues

I started using this in my car every time I put a full tank of fuel ⛽️ and I’ve noticed the engine has a lot more pickup when setting off from traffic lights. I will continue to buy this as long as it stays cheap.

Purchased these after using STPUltra on my wife’s car. The difference it made was incredible. So I purchased this to use as a maintenance in her car and an extra to use in mine. The results have been incredible, the Ultra transformed my wife’s older car making the engine quieter and more responsive. So using this was just to maintain that level.

Hard to say if it works but I can only imagine it'll do the job it describes very well indeed. I've used their products when I had older vehicles years ago and I can whole heartedly say they helped then so I'm hoping this helps prolong the life of my engine with its stop start technology. I drive a 3 series BMW which was of the first models to have the functionality fitted in 2012.Simply fill up your car with fuel and then add this, the sloshing around of your fuel will mix it perfectly. Use every few thousand miles it says on the bottle. So far so good and no negative impacts.

I'm using this in a 2011 Renault, and have had no problems since I used it. I can't tell whether it's actually preventing deposit build-up, but for £6 I personally think it's worth the money. Not much lost, as you only need to use it every 1,000 miles or so. Compared to the cost of the petrol it's next to nothing.

I have noticed my car sounds much much smoother on the road since using this product and I think it's also true about petrol economy...I did mix it with Unleaded Shell V-Power and car drives and feels superb since.