– Archoil AR6400-P MAX Pro PEA Complete Fuel System Engine Cleaner - 400ml

Further to my original review below, I have used this product for about 2yrs now & what a difference in performance, exhaust note & economy (when I can keep my right foot from having a great time). Didn't overdo the use of this product as I preferred the engine to settle & didn't want to overdo it when not nessessary. Keeping the systems clean is always good to keep things running at their optimum, but not sure of short time span multiple uses if this can cause any degradation of parts. My moto is, don't overdo a good thing & I have reaped the rewards. 😁 Put into 30ltrs high grade fuel a couple of weeks ago. Car is a weekend pleasure so still have slightly less than half a tank to go. Seeing subtle results with throttle response & exhaust note. Moving in the right direction & happy with the results so far.

Car was rough idling and not brilliantly economical. Used this in a full tank and drove a couple of long journeys, motorway miles, and after about two weeks all was fixed. I’ve also continued using the the sibling product on each tank, for about two months now, and economy/mpg is substantially better - 10-15% approx. Will use this again at 10k miles and see what happens, though I’m already chuffed with results. Engine seems a bit quieter, too, and ticks over like new.

Installed this in a VW Up! 2013 Blue Motion @ 130,000 miles (all mine from new). I split it over two tanks (needs at least 40l and the Up tanks are smaller). I ran it on a long run (500 miles to York and Back) following a full service inc oil and plugs and everything. I must have at least 20 more horses and 15% more MPG. Acceleration at low revs is noticeably better - almost like new. I am a convert. Going to try in the wife's Skoda CitiGo which is in a similar condition next.

I recently purchased the Archoil AR6400-P MAX Pro PEA Petrol Fuel System Cleaner Concentrate primarily to clean out carbon deposits in my petrol-powered vehicle. While the cleaner did show some effectiveness in clearing deposits, I must say it wasn't as significant as what I've experienced with other premium brands. The cleaner's Pro PEA (Polyether Amine) technology does work to some extent, as I noticed a slight improvement in my engine's performance and responsiveness. There was also a marginal increase in fuel efficiency, which is a positive outcome. The concentrated formula made it easy to treat my vehicle with just one bottle, offering good value for money. The instructions provided were straightforward, ensuring a hassle-free application. However, when compared to other premium brands I've used in the past, the clearing of carbon deposits with the Archoil AR6400-P MAX Pro PEA Cleaner wasn't as pronounced. While it did have some effect, I expected more significant results. On the positive side, the cleaner's compatibility with GPF and CAT components is a crucial advantage, as it ensures the proper maintenance of emissions control systems. In conclusion, the Archoil AR6400-P MAX Pro PEA Petrol Fuel System Cleaner Concentrate is a decent option for cleaning carbon deposits in petrol-powered vehicles. It does show some effectiveness in improving engine performance and fuel efficiency, albeit not as much as some other premium brands. If you're looking for a cleaner with Pro PEA technology and compatibility with emissions control components, this cleaner might be worth considering. Pros: Shows some effectiveness in clearing carbon deposits Concentrated formula offers good value for money Straightforward instructions for easy application Compatible with GPF and CAT components Cons: Results not as significant as compared to other premium brands

Changed spark plugs last year on a 2006 Volvo C70 2.5 T5 that had been neglected needing various sensors replacing etc. Long story short, took pictures of each of the piston heads in 2023 (July). I've since put x2 bottles of this product in and changed the plugs again today. While there are still carbon deposits present (come on, it's had 18 years of use lol) Cylinder 5 (pictured) has had a lot of the deposits removed. The same is true for the other 4 cylinders. I honestly never knew if these products actually worked well, but after testing myself, I can say that they are working. I'll probably put another 2 bottles in before this time next year and check again (and upload if I remember!).

Great product which does exactly what it says. All their products are great so far.

Very happy with this product. Orange warning light came on the dashboard. I was advised to try a fuel system cleaner. Saw the good reviews for this product. It took a couple of hundred miles, but it worked. Saved an expensive trip to the garage.

My Mini Cooper R56, has a random miss fire on cylinder 4 sometimes on 3 too only when I’d done about 15 miles plus. Bought this after replacing spark plugs, messing around swapping coil packs etc. Thought for the money was cheaper than a garage. After about 1/2 a tank the car was definitely quieter on tick over, and the misfire appears to have vanished too. 3 tank refills later cars still running well, slight increase in mpg 30 or so miles on a tank of fuel, acceleration has also improved. The mini has less than 40l fuel tank so only needed to use 1/2 the bottle. Only downside is the bottle is black no light penetrates at all so hard to measure 1/2 a bottle.