Archoil 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)

good quality fuel additive, the engine actually smokes a little less and runs more quietly

Improvement in mpg (actually got 40mpg on a motorway run from Manchester to York) and smoother running. Always use it when I buy supermarket diesel. RR SDV8. Slowed down the intervals between services as this was as low as 3k miles. Now upto 5k to 6k.

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 itwith the price of fuel in the UK. But long story short , seems good 👍

Very good product. I’m using this for number of years. Keep engine running smoothly and injectors clean from soot. Highly recommended

This seems to be good quality.It's too early to give a genuine review in whether it works, but it does seem to prove the engine running, especially under speed.I'll update my review in the future if there's anything significant worth reporting back on.

Good product. Used in a high mileage VW Transporter.Seems more responsive and for the price, worth using in every fill up. I always put a little bit more than recommended (like 5ml).Lots of complaints about the bottle. Its absolutely fine and good for measuring the amount.

Excellent productMore power better mpgCleaned the injectorsCar feels different well happy with it

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.