Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles

I suspect my Audi 3.0 TDI had a clogged cat some 5 years after a DPF delete back in 2019. MPG was down and it felt like it was also down on power. Sometimes the "Italian Tune-up" (high rev driving) would briefly help by blowing a lot of crap out the back, but it would go back to reduced after a day or two. I had been using the Hotshots Every Day in each fill-up, which may have slowed this issue down but it still happened. I also tried Opti-Lube XPD for a few months. Not much, if any, improvement. I do suspect they helped improve cetane values, but idk what else. If I had a good run, I was getting ~560 miles per tank. After some YouTube videos, I decided to try Archoil. I didn't notice anything for a couple fill-ups, but after about 1-1.5 months, I started to notice some slight improvements in mileage to/from work and some other trips. It was getting hard to hit 30 mpg on the way to work, whereas I started hitting 31-32, even with significant traffic. After 2 months, there has been a definite improvement. I'm currently seeing 33+ mpg on the way to work (same conditions as before) and reaching closer to the 38 mpg EPA advertised on my way home. I've also hit 42 mpg coming home from a friends' house, whereas before it was struggling to hit 39. Power feels like it has returned to expected levels compared to the previous treatments. My range is now reporting >600 miles per tank, even dealing with some stop and go traffic. For the results, price, and ease of applying into the tank, I highly recommend using it and I intend to continue using this from hereon out.

Works well in our diesel pickup

Been using it for almost a year now. I definitely get better gas mileage and when i don’t run my truck with it, i can definitely tell the difference. Highly recommend

Used every time I refuel my diesel trucks. Keeps my fuel system lubricated.

I would have given it five stars if it wasn't for the claim of better fuel mileage. Did not see this out of the product I just hope that it's lubricity is as prescribed and it helps prevent failure of my pump. I was using motorcraft additive prior not sure how you would really rate this if it's effective other than the fuel mileage

This is the first product I have used that actually does what it says. For a 2015 F250 powerstroke, gained an average of .8 MPG, but more importantly, stretched out my regens about 70-90 miles further.

Really good product

Didn't help with my mpg but really helped with the dpf filter cleaning. Light was coming on every 40-50 miles. After using this for 10 tanks of deisel the light only comes on about every 3k miles. I now use it regularly. It seems to really help and would reccomend.

Great product, gained MPG, truck seems to love it, I’d definitely recommend!

This seems to work really well. Just started using this especially for this winter season. Seems to improve mileage.

The price and quality of product made me try it. It's been a good change. However, the large jug was shipped in just a plastic bag. The nosel was bent and the cap broken so could never seal it back up without it leaking. Recommend shopping in a box.

Works really well

My VW with 400000km loves it. Increased the power and smooths out the cold starts. I had an engine light on for dirty or partially clogged injector cylinder 4. Engine light is off now. The VW runs like when I first bought it.