fuel additives

[NH TC25D]

I'm really surprised with you living in Wisconsin that you do not routinely mix #1 (kerosene) in with your #2 (normal diesel fuel) when it will be below 12 degrees F or so. That is the overwhelming common practice in northern states. A relevant note is that in some places you can depend on your fuel source treating the fuel in cold months. I would never depend on that myself unless I knew with absolute certainty it was being treated reliably and consistently. That's not easy to do.

Service stations eventually switch over to a winter blend. Years ago they just went from #2 to #1. Back then the advice I got from a friend who drove long haul and the dealer was to use Power Service. The mix that boosts cetane and reduces the chance of jelling. I also have been using a better quality filter specifically designed to not only filter out particulates but also water. So far, over 24 years have never have had any fuel related issues. Fuel filter replacement schedule hours were more than doubled and when I look at the bowl and filter I think maybe even longer use. But then.... I smarten up a bit.