ArchoilAR6500 Diesel Treatment (40.6oz) Two Pack - Treats 800 Gallons - Additive for All Diesel Vehicles

First off, im always skeptical of products like this. I have an older Fecon forestry mulcher with the kubota 99hp engine with around 3,800 hours. This thing ALWAYS smoked pretty bad at start up and even a decent amount at idle after it was warm. I added this product in the performance dose amount, only about 6 engine hours ago. Started it up this morning and next to ZERO smoke!!!!! Like how, what, holy crap!!!!! No smoke even when throttling up! I have definitely tried other additives in the past and nothing has ever been this good. I also put this and the fuel system cleaner in my 200hp Rayco C-200 mulcher. Noticed a different smell from the engine a few hours later then it went away. Guessing it was burning stuff off? I just ordered more and also the fuel system cleaner for the smaller Fecon. I definitely didn't get a discount in return for this review. Would have been cool, but I paid full price. FYI- we run these machines wide open 8-10 hours a day. Im blown away. Good idea to replace the fuel filters after doing a fuel system clean too.

I have a 2025 Chevy (Duramax) and run Hotshot transport. I used the product exactly as instructions prescribed.I honestly didn't see any improvement in fuel mileage. In fact, if anything, a slight drop while loaded.However, I did see a noticeable reduction in DEF consumption!I can't say it helps with improving your mileage, but obviously helps it run cleaner! If you have a higher mileage truck and you use the system cleaner product then this? Yea, I can see how it would get you back on track.Will I use it again? Na! Probably not for a long while

I have used this additive in my 12 year old Jeep with 162,000 miles on it and have noticed a 2 mile per gallon increase in mileage . It’s the first time an additive have done what the advertising promoted .

Really helps smooth out the idle and produce less soot in my 2000 Excursion. Get the oil additive too. MPG improved by a few miles which is pretty insignificant to me but how smooth the truck runs is quite dramatic. Put this in your truck, you won't regret it

I like the easy to use measuring bowl with spoutThe cap on the spout is difficult to remove (maybe my bottle is defective)The extended spout makes it easy to add this to diesel tanksSimple 1oz, per 10 Gallons of dieselWell marked measuring bowlI have been using this for a few tanks so far and I am not sure I notice a difference. I will continue to use and update

I am now on year 3 of using/testing Archoil. This fuel additive is absolutely not a gimmick! I started using this immediately upon the purchase of my 2022 F-450 6.7L Powerstroke. The first year of ownership while using Archoil was done primarily for the prevention of of having CP4 failure and destroying the engine. I noticed the F-450 was getting better around town mpg and highway mpg than the 2016 F-250 6.7L it replaced by 2-3mpg easily. After 1 year going through several bottles of only Archoil, I switched to Hot Shot’s Secret EDT since it was supposed to be better. On the very first tank I noticed my mileage drop and the engine seemed to be doing more frequent re-gen’s. After one year of using Hot Shot’s Secret, I switched back to Archoil and on my first tank my mpg increased again and the engine was noticeably more quiet at idle and upon initial acceleration. Now on year three of owning my F-450 my mileage is so much better and re-gens are back to every 600-700 miles. I will only be running Archoil every fill up.

This item provides vital lubrication to my diesel truck since the sulfur in current diesel fuels at the pump has been reduced significantly. I have had several diesel mechanics recommend this or something like it to prolong the life of my truck's engine.

2011 VW Touareg TDI/80k mi.:Relieved the start up engine studder.Appears to run much smoother via my seat dyno.Much approved result over the previous product I used -will buy again.