In oold parts of the country you may be able to find Diesel No. 1 fuel which has higher cetane and some additives. I really like the fuel additive in the white can available at any truck stop. It takes moisture out of the fuel that condenses in the tank in winter. It has some cleaners in it and a little cetane boost. Using it is much like adding Heet to your gas engine.
If you go back to the auto parts store and notice how many additives there are for gas engines it will give you some perspective. Temperatures below zero, it really helps to use synthetic oil and plug in your engine with either a block heater or a dip stick heater.