Archoil AR6400-D Diesel Fuel System Cleaner (Four Pack) - Cleans Injectors, Turbo & DPF

I have a 2003 series 60 egr engine in an RV. I was getting a check engine light code for egr valve not responding. I suspected it was carboned up so I decided to try this product. After 1 tank, the check engine code is gone and I can feel an increase in power. There is a hill where my bus would always downshift. It doesn't downshift now, maintains set speed and powers thru! I don't know if I've seen any improvement in mileage, but I'm happy with the results thus far. I have now ordered the fuel conditioner as well. Good product!

Well the product didn’t work for my particular car, the customer service was good and I appreciate their communication. Glad to see the many positive reviews where people had their DPF back in working order, give it a try.

This is a great product but it took almost a week for it to ship . That's terrible service !!!

Archoil has me as a customer for life! Product did exactly as described. I had less regens better mpg with and without trailer. I’ll be buying this every 5,000 miles

Helps keep the engine cleaned out and running well.

i have high hopes that i see an improvement in my MPG ? been running there fuel additives for a couple years but this is the first time with this hoping to clean out filter..

Great product

Put this in my tank just before towing a camper from Pensacola to NJ. Truck ran better than ever and also gained an extra mile per gallon. Highly recommend