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

Been using for a few months and seen improved gas mileage so far

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 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 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.

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.

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 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.

Better gas mileage and performance