Power ServicePower Service Diesel Kleen +Cetane Boost - 26 Ounce (Pack of 12)

Same product I have purchased in the past. Seems to increase diesel gas mileage a little in the 1st & 2nd tanks of diesel.

Diesel fuel additive

Marine diesel works great with this. Never a fuel issue. I can't say how things would go without - or with something else - but I'm very happy with this in the tank.

Great product. However NT had an advertisement for 12 pack at 85% off and did not honor that sale. I was sent one bottle rather than the 12 that I ordered. They could have delt with this situation much better. Instead of sending a far smaller quantity than I paid for plus the shipping costs. I should have been contacted first. But trying to get me to return the package, taking time out of my day making an inconvenience for me. Save yourself a headache and buy this product from any other seller. I know i won't be send any of my hard earned money to Northern tool again.

I use this in my motorhome on every other tank for a nice smooth running motor. Too bad the price keeps jumping higher

Ease of use

Northern tool does not honor their advertised deals. Ad said 12 pack of diesel cleaner, added huge shipping cost and then only sent 1 bottle claiming it was an advertising mistake. Refused to honor the ad but did agree to a return. Currently waiting for reimbursement hopefully including shipping expenses.

I don’t think it improves your mileage