AR6900-D Max Advanced Diesel Additive Concentrate, 1L Treats 1,000L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (1Litre)

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.

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.

Got my Skoda 2.0 TDI with 12k miles about 8 years ago. I've added a (generous) dose of this virtually every time I fill the tank. With 112k miles on the clock my car is still running well. Engine sounds smooth and quiet for a diesel. I don't know how much, if any mpg it's adding, or if it's actually doing any good. All I can say is that my car starts without any problem on original glow plugs, I get around 50mpg average (70+ on a long, steady run), and no EGR/DPF problems so far. Also, it feels like I'm still getting all of the claimed 150 bhp. It appears I'm on my 5th bottle of this additive, so I've spent a bit over £100. It seems to be money well spent.

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. !

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.

I’ve been running Archoil AR6900-D Max in my 2007 VW Transporter with fairly high mileage, and the difference has been noticeable. The engine feels smoother, starts easier, and seems to pull better under load. Fuel economy has also shown an improvement, which I wasn’t really expecting but was a welcome bonus. For an older van that’s done a lot of miles, this additive has really freshened things up and given me more confidence in its performance. Definitely worth the low price tag compared to others and I’ll continue using it!

I really rate this item. From first use I noted a smoother throttle response and more critically a smoother downshift on the auto gearbox of mini f60. Improved mpg also noted. Use it monthly now for maintenance

So, I tried AR6900-D Max in a BMW 535d GT used on a regular 1353mile (2177km) trip through UK, France and Spain over 3days. Three tanks of diesel, 70ml added at first fill (70litre tank), and 50ml at next fill ups (50litres). TLDR: Didn't notice or measure any difference in fuel consumption or performance. This car usually returns between 37mpg to 39mpg doing motorway speed limits (70mph, 130km/h and 120km/h in each respective country). I was hoping to crack 40mpg which my old 530d GT could do (same size engine but with one turbo rather than two). Well, after 1353miles I was disappointed to see the trip computer (after reset at start of journey) showing 38mpg. This trip is with the same tyres and pressures, same filling stations, but at different time of year. It seems air temperature and headwinds make a bigger difference to mpg than this additive. To note, the engine is well serviced (oil changed every year) with BMW LL04 spec oil, now at 110000miles. Manifold/AGR (AGR = EGR in German) replaced several years ago due to soot build up jamming the swirl flaps, so intake should be relatively clean. DPF is intact with zero soot on exhaust tips (just light grey ash deposits). And the only running issue ever noticed was related to faulty glow plugs/controller making initial cold/winter starting a little lumpy/rough for a few seconds before settling at idle (now rectified). So it could be that as this engine is running perfectly fine, that the additive makes no difference compared to a car that may have underlying faults or running issues. I'll use it again on the return leg to finish off the bottles, just to confirm and edit if I notice changes. As a footnote this additive improves cetane value, which should help combustion. However if fuel quality is already optimal and engine condition is good then obviously it's not to going to make so much difference. It also smells exactly like the Eolys (176/ PATs/ powerflex) fluid that automatically adds fluid to the fuel on some 1.5/1.6 peugeot/citroen engines (and older Ford and volvo's with the same DV6/DV5 engine). So it's possible it contains similar ingredients and probably no use to you if you have a car with a functioning Eoyls system. Dosing is simple enough, but store it upright in an air tight ziplock bag, as if you know what Eoyls is like to smell/handle, this stuff is just as bad... nasty! 3 stars based on the fact it does contain ingredients that should help with combustion efficiency, but I couldn't validate any claims in real world use. Even at its discounted price of £11.96 for 500ml it equates to nearly 0.24p per litre of diesel or £1.67 per 70litre tank. And with no difference in fuel consumption, it actually increases the vehicle running costs. Edit: (16Dec2024) After a return leg of the same 1135mile journey, fuel consumption was actually slightly worse. But I've tried a few doses in a Seat Altea with the 130ps 2.0TDi PD (BKD) engine, which is used for local 20-30min commutes on mixed 30mph and 60mph roads and that appeared to be about 1mpg better. So again not really worth using.