Power Service Diesel Kleen + Cetane Boost - 12/32oz. Bottles

Starting running this right around 10K on a new Cummins diesel. I did before and after mileages with three different tanks to really see if i was getting any bumps. My driving is mixed about 75/25 highway to city and I do 1000 miles a week on average. Three tank average without was 16.9. Three tank average with was 18.4. That's doing the math and not using the onboard estimator. That 1.5 mpg bump is good enough for me. I also noticed that it ran a little bit quieter too. not as much injector noise though admittedly that could be in my head. Either way the product works and if it help prolong the life of the injectors even a little then thats just a bonus.

I use this product religiously in my 1987 F-250, 6.9l idi. I notice immediately, increased performance and less of that “diesel rattle” from the engine.

We went to a Freightliner class and have a Cummins engine in our Class A motorcoach. The instructor told us this product had been approved for use by Cummins and went through the best engine running conditions to get the best fuel economy. We followed his instructions and during our trip the summer of 2018 (about 7000 miles) got around 11.5 mpg on the road. Nice. For a Class A 32,000 lb coach towing a car - real nice. Yes, I buy it by the case now and give samples to my friends!

I put a few bottles through my Cummins pickup on a trip from Florida to Colorado and back to Florida. Mileage may have improved slightly, but I could tell a difference in throttle response. I also noticed smoother idling and quicker regeneration cycles. Recommended by Cummins is a BIG plus! Peace of mind - I think it’s worth it to keep injectors clean and pump lubricated. Each bottle treats up to 100 gallons…I used 1/2 bottle per every other fill up (slightly higher concentration). Happy motoring.

I use this on my motorhome and see improved mileage and performance over periods of not using it. It is the only additive approved by Cummins to my knowledge.

Love the product, have used it for years but the description says 12 each 32oz bottles and package delivered us 12 each 28 oz bottles. Not sure where the other 48 oz went but I did not get them!

This product is highly the one fed by Cummings diesel and keeps our engine running smooth and quiet under any conditions

I've been using Power Service Diesel Clear in my boat for the last several years, does wonders, engines were a little smoky when starting during cold mornings, engines fore up now with no smoke, she accelerates and get on plane a lot faster, noticeably difference in performance and economy. I'm running Detroit 6-71 engines and Yanmar generator. In my opinion, nothing works better