Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles

Used regularly on a 2006 F250 and 2015 Passat for the last 4 years. Noticable performance improvement and no engine issues on rather old vehicles otherwise known for engine problems.

I have been using this product over a year and let me tell you that this product works, it does what promises, increase in mileage and my regent are around 500 miles on the clock. I drive a 2024 silverado 3500 and city gives me between 14-17 average but on highway 19-23 that’s impressive for that diesel truck. Super happy with the product results.

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 been using this product for years. The product hasn’t changed but the quality of the pour spout did it’s darn near impossible to remove the cap.

Was's using hot shots secret diesel treatment for years. Lost pump anyway. After repairing pump with a new one, Ford tech said lubricity was the problem. Started using Archoil and hot shot LX4 With exactly the amount stated on bottles. Have been running arcoil for about 6 months now. Truck runs great but do not see any difference in mileage. Now all of a sudden The truck will not go over 40% on the regen gauge. thought truck was having electrical problems with regen gauge. So after 2 tanks with Archoil and not getting any higher than 40% on gauge, I filled truck up and did not put any additives in that tank of fuel. Have run over a 1/2 of a tank of fuel and not gone over 50%. Will wait and see if it regens now. Hoping that my cat is actually that clean.Must be working if it freaked out my regen system like that. clean.Thee only complaint is the screw off cap on bottle. PLEASE RE ENGINEER THIS CAP. Every bottle purchased have had the same problem,have to use a pair of pliers to engage outer cap to inner cap when removing.

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.

I have purchased this product before and it works great. The price was reasonable and it was deliverd as promised.