Power Service Diesel Kleen + Cetane Boost

I use this in my New Holland tractor. The only one recommended for diesel engines by Cummins. Keep engine running smooth and clean.

If you own an diesel motorcoach and don't drive on a regular basis, you should be using this. Keeps fuel fresher and eliminates problems down the road.

Great product. Keep all fuel components on diesel engine clean and running. Gives better mileage per gallon. And better power.

use it all the time in my diesel truck

Good product; reasonable price; prompt delivery; will need for cold weather in our diesel truck. Thank you👍

I had to do my own math to calculate how much to use and then i added a little more to really clean it. the mistake i made was that I didn't run it enough when I added the additive. other than that, its working great. I'm trying to finish up the tank right now.

Been using diesel keen for 35 yrs, never a problem

This product is recommended by the engine maker

Have used it for many years.

I always run this additive in my diesel pickup. Grey bottle in warm weather, white in cold weather. My engine has 298,000 miles on it and this is part of the reason. If I didn't give it more stars it is because (a) We shouldn't have to ADD anything. Either the engine manufacturer should have designed it better or the fuel company aught to make the fuel better. I feel - manipulated (?) somehow. And (b) It is ridiculously complicated to figure out "if a 26 oz bottle will treat 100 gal, and I ESTIMATE my tank will hold 20 gal at this fill up, how much should I pour in before I begin filling", and how am I supposed to eyeball 6 oz (the answer to the algebraic equation was 6 oz, btw) when I'm filling my tank at some lonesome country mom and pop store right before closing. IT SHOULDN'T BE COMPLICATED. Geez.