Archoil AR6900-D Max Advanced Diesel Fuel Synthesis 500ml | Advanced Super Diesel Fuel Converter with Ongoing Fuel System, Fuel Injector, DPF, EGR and Turbo Cleaning (500ml)

I've yet to see the cleaning power as i'm not testing it and comparing before and after in my diesel car but the improved starting capacity has been noticed as I used about 30ml whilst on about 35 ltrs of diesel in a 50ltr tank. I will check my egr in a week or two to see how much it's helped keep that clean as I disconnected my egr to partially clean it whilst in place just before using this product. For the price you get more than one use worth, you get quite a few so this is a product to last over a year depending so for maintaining the fuel and helping the system it's well worth the money. I'm already seeing an improvement to my average MPG which while pottering about town doing short trips is very beneficial. EDIT: After 7 months of use doing a lot of short journeys I can say without a doubt this is a perfect product for keeping a diesel in optimal health as my system runs better, it's cleaner and i'm never having issues with starting, my average mpg has risen to 31mpg which is a huge improvement over the 22mpg I was seeing before I started using it, and if i go on a longer journey it continues to rise until im back to my working day routine doing short trips, and if i take my car out on the NSL roads i'm seeing upwards of 36mpg - did i mention that cold starts aren't an issue anymore? The engine runs so much better with this product in it with the correct amount ie 1:1000 ratio so 1 ltr=1ml, for my 53 ltr tank i need two squirts of this bad boy as they are about 25ml each. I swear by this product as i've had concerns about my dpf and egr getting clogged and being at risk due to my driving habits and after having my egr out twice over the last 7 months to inspect it i can confirm this product is actively cleaning the system, it's not making the egr spotless but the buildup of carbon has been drastically reduced and the EGR is less like a carbon-geode cracked open, even my egr valve solenoid is relatively clean. I'll be forever buying this and adding 70ml to every tank before i top up with new fuel, it's a incredibly affordable product that works like a charm! Please do wear gloves when handling the bottle as while it's not the worst smell in the world you don't want it getting on your hands and then on the interior of your car where you will smell it for weeks.

The short version: Archoil AR6900 has noticeably improved the DPF regeneration process on our high-mileage Nissan Qashqai 1.5 dCi. The longer version: After more than 40 years as a car enthusiast, I’ve tried plenty of so-called miracle additives — many of which turned out to be little more than snake oil for tired diesels. So I approached this one with a fair degree of scepticism. We bought a used Nissan Qashqai 1.5 dCi with over 155,000 miles on it. It had been meticulously maintained, but we knew that using it mainly for short journeys (under 10 miles) would likely lead to soot build-up in the DPF. I monitor the regeneration process using an app, and the miles between regens were quite low. Although the car was completing regenerations (no failed attempts), temperatures rarely exceeded 600°C and soot levels would only drop to around 3–4g — never fully clearing. We started adding AR6900 at roughly 50–60ml per 50 litres of good-quality diesel. I’d also take it for a proper drive once a fortnight to ensure the regeneration process was triggered whilst monitoring it. After the fifth treatment, I noticed a clear change: significantly more miles between regens, regen temperatures increasing to around 650–670°C, and — for the first time — soot levels dropping to 0g. That had simply never happened before. I don’t monitor MPG closely, so I can’t comment on fuel economy, but in terms of DPF performance there has been a definite improvement. From a cost perspective, it also makes sense. Even allowing for the additive, it still works out cheaper than regularly filling up with premium diesel that claims to contain similar detergents and cleaning agents. For me, it’s a more cost-effective way of achieving comparable — if not better — results. I’ve since started using it in a 23-year-old diesel as well and have already noticed smoother running after just a couple of partial fill-ups.

Rated 4 stars as have no long term Data , I put a few treated tank fills through my mk7 ford transit , 175k on the clock , I wouldn't say it transformed the engine performance, but it is definitely smoother and seems to pull a little better .. a bit like the human equivalent to getting a good night's sleep 😅. And yes I guess I would compare I to putting premium diesel in , but then are you really saving much money in adding it yourself. I would have to do the math, but suspect there wouldn't be alot in it with the price of fuel in the UK. But long story short , seems good 👍

It is difficult to assess how effective these products are in the short term. I had a problem with my Mazda 6 2.2 diesel car, inlet manifold and EGR blocked with carbon. The Mazda mechanics cleaned it out and one of them suggested using this additive ALWAYS. That's two years ago and I still am. The car is fine. Its no trouble to use and I use it as if it was a religious requirement. But who can tell what is happening down those holes without a teardown ! Time will tell ! The MPG is steady and good. The iStop works every time ( it stopped just before I had the manifold/ EGR problem ) so I'm hopeful ! Very economical in use, so, a good buy.

I initially bought this to help with a slight misfire on my fuel injectors and after 1 to 2 tanks of fuel it runs like a top, there was also an increase in MPG and the car just ran better. I have a Volvo D5 with 165,000 miles on it and when I first got the car, the DPF was having to regenerate every 150 to 220 miles now it's regeneration is around 6 to 800 miles each time and my dpf soot content has dropped from 11g after regeneration to 5.4g with a drop in dpf differential pressure which helps the car breath better. When this runs out I'll definitely be buying another bottle as it definitely has long term benefits just ensure that every time your car goes into regen that you drive around at a constant speed to help it burn off the soot for the full cycle as the dpf is at 600+⁰c so switching it off can also damage the dpf.

What an excellent liquid! Ive been using fuel system cleaners for years..about 30 years to be exact..i had never heard of this make. I had been using makes like wynns and holts..etc. My god!...THEY ARE COMPLETELY RUBBISH compared to this!! After putting it in the first tank load you can feel the..difference. You would think that its expensive but its ALOT cheaper rhan the rest of the makes. I used Wynns fuel system cleaner a week before i bought this. It made hardly NO difference to the drive of my vehicle. It cost me £5 and that you have to put it in one whole fuel tank load. This item cost me about £25...but im still using it! I must have used it in more than 5 tank loads already and ive still got more than half of it left! I can use this liquid for at least 20 full tank loads! Guess what? My vehicle now flies! This is an excellent liquid..ive been wasting my time on other well known makes which are absolutely useless!! Im very surprised that i have never heard of this make. Excellent cleaning power..comes in a very user friendly container which helps you use as little or as much as you want. Excelent..excellent excellent. !

This really works. Had clogged injectors. Takes time to work, keep using it and you will see results. Cleans very well. Use gloves when handling, product has a strong smell to it. Found it's wise not to keep it in the car just in case it spills

This is fantastic stuff , and boy don’t you notice the difference when using it