AR6500 Diesel Treatment (40 oz) Two Pack - Treats 800 Gallons, Diesel Fuel Additive - Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster

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.

Stuff is the best. Love it.

Can’t say enough good things about this diesel additive. Use it in my motor home engine. Can’t believe the difference in the sound and smoothness of the engine running. Plus I get better fuel mileage.Ive used several types of additives through the years and this is the best.

If you own a diesel that has a CP4 fuel pump, this helps keep it lubricated! It also keeps your Turbo and EGR Clean. I use it every fill up

Keeps regen cycles low saving evil def fluid and helps clean burn of fuel increasing mileage!

I have kept an additive in the fuel of my powerstroke since new. I tried a different brand one time and noted more Def consumption due to the increase in regens. The winter blend also works great. Never plug my truck in and always starts smooth.

My 2020 F150 , loves this product .148 K and going strong. Been using Archoil products for awhile now. Good product equals peace of mind.

My truck has never ran so clean! I’ve tried just about every other additive. Mileage seems to have improved a little, and the truck runs smoother and “happier” :)

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.

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

Works well

Works very well, had to order again

Product is expensive but it works. You get what you pay for