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

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

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.

Keeps my truck running great on the nasty California diesel.

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.

Ok. I love this stuff. It's improved my mileage by just over 2 mpg. It's quieted the engine (7.3 powerstroke) and I get easier starts.

Best product there is! Run diesel and gas mix in all our vehicles!

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

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.

Improves milage and proformance. I have been using it for over a year know. Impressed with results . I highly recommend it to my customers and friends. I've bean a mechanic and owned my mechanical repair business for over 40 years and have seen a lot of snake oil being sold out there . IT JUST WOYKS!

Mileage dropped more than 2L/100kms

First time buyer and have not put enough tankfuls through to comment on performance BUT, cap did not seal. Bottle tipped over in the box of my truck and half of the contents leaked out. BOOOO! Do we not have the technology to make a spill proof container??!