ArchoilAR9100 Advanced Friction Modifier & Oil Additive (5Litre)

Helps a bit with L15B Honda Jazz VTC actuator nosie while cold start, while most of the engine oil addtices only help with engine performance.Also been put some on a R18 Honda civic engine, can notice slight fuel economy increase and better throttle responWill consider to buy again in the future.

I have been using this (and the 6900D - much cheaper than using premium diesel) for a few years in my C250. Its always smooth and responsive and often so quiet that I have been asked if its electric! Very un-diesel. In the warmer weather and longer journeys (40 to 300 miles) I get 60-70mpg average at motorway speeds. As others have said, maintaining motorway speed just needs a feather touch from the right boot.

If your like me and always on the look out for that something that will make your car feel just that little bit more powerful, little bit more responsive and quieter well this stuff really does works ! Instruction say add AR9100 into your next oil change and drive your car NORMALLY ! That i did and within 2 to 3 miles i started to feel my car, which is a nissan xtrail 1.6 dci 130 bh 2014 with 20,000 miles on the clock, become more responsive more smoother ! I always use a decent motor oil ( Royal Purple HPS 5w30) and change the oil in between services at 6000 miles aprox ! So my engine is in a good condition with little or no carbon build up, plus i use Archoil AR64-D max fuel additive, which is also excellent, to keep on top of the carbon and lubricate the the fuel system ! So back to AR9100 ,Been on a road trip today covering about 145 miles on motorways, city driving and end up in the peak district on long hill accents and down hill decent and yes i really did feel the difference in my engine ! Remember when i said drive the car NORMALLY well i think if you drove you car boy racer style,thrashing it everywhere you prob would not notice the difference ! But one thing i did notice especially on the motorway is how i was feathering the throttle more just touching it and gaining more MPH,smoother over taking ,felt great ! So will i be buying again ? YES i will !Its a great product and one other thing i never use are supermarket fuels ! Cheers

I see no difference.Maybe is nothing wrong with my engine? ;)I think that when an engine part is old and over used it needs a replacement not a miracle in a bottle :)

Seems to work as intended. VW Polo 2009 1.4 TDI hatch. Engine less noisier, mileage a bit improved.

I used this in a 3.2 Tdci Ford Ranger 4x4 with 45000 miles on the clock. I do a lot of long distance driving to Spain - once a month at least so loads of steady state motorway cruising at 70 - 80 mph. I get 27.3 mpg long term average (which is good for this type of vehicle) and my average is now running at 31 mpg which is a considerable improvement. Well pleased with that alone. Other than that the idle is definitely quieter to my ears and the power pick up on acceleration seems smoother. Very subjective but overall enjoying the fuel saving if nothing else. I debated the purchase as research showed that there was a balance in two diametrically opposed views on whether additives in general and this one in particular were any good. Glad I decided to try it. I used 500ml in 10l of oil. If your gains are even half of mine it is well worth using. Be well.

Used this on a number of cars with different size and fuel types and it always makes an improvement. The engine noise and vibration reduces. What I notice, which I think is relevant here, is that I can stay in a higher gear for longer. I therefore get a good improvement in economy in city driving, where you're often slowing down somewhat and speeding up again, and where you often face an incline as I don't need to drop a gear quite as quickly. This is evidence to me of reduced engine friction and it needing a little less power to move at the same speed, justifying my perception of economy improvements. I don't know if you would get much of a fuel saving if you're often accelerating aggressively, but I really feel this reduces the wear on the engine and therefore is good for everyone in the longer term, but you might just not be able to tell if it is helping.

I had DPF blockage issues as well as car response was sluggish,Stalling issues and couldnt hold on lower gears longer,all those Issues are gone ,this would be my 3rd treatment, 200ml is enough to treat 5.4 litre of engine oil,I have bought 500ml this time so can be used for atleast 2 oil changes and also partly because seller dont deliver to Ireland i used DPD wizard for a reasonable postage charge.I also use Archoil Fuel treatment AR6900D alongside side this one,If you are using this product for the first time ,i recommend change oil and filter along with fuel filter after 6 months and use these additives again ,also use good quality filters forexample Bosch not to mention good quality engine oil and you will definitly see the result after few thousand miles.I haven't got a single warning regarding DPF 10 months on.My vehicle manufacturer (Astra J 2014) recommends changing oil yearly or 20k miles but i will change early to keep engine clean and fresh that will allow additive to work more effectively.Remember To change oil regularly as Oil is the Life blood of your engine.Additive is only there to clean and protect the engine to a certain time and mileage.