Winter Diesel is #1 diesel and essentially kerosene. It is a drier fuel so should have some lubricating additives added. In addition it contains less paraffin wax so your mileage/power/etc will not be nearly as good as #2 diesel. I would just purchase a winter additive and add it to your #2 diesel.
I am using ulsd which doesn't have much lube anyway and also my old engine was not designed for it either but I add gray bottle PS @ double strength at the tractor when topping it off fwtw.
I am cautious about trusting "winter" additives as a do all for #2 fuel for this reason.... I have heard so many stories of trucks gelling up that suposedly had winter fuel it happens every year around here.
I personally have had farm semis gel out on the hwy and that is no fun changing fuel filters in 20 degree weather on the side of the hwy and in all the other bad weather that comes with that. #1 and #2 mix is the only for sure way as long as its mixed right and at 5 gallons a fill affording #1 #2 mix for one of these Yanmars is no biggy jmho on that. my .002
I keep meaning to do the math and add some 2 stroke at 300:1 but haven't yet. Even loggers around here have trouble starting stuff when it hits the teens. I assume not all places sell winter mix here in sc, cause each time we have a few cold days in a row I have a logger that has to change filters or either cant get something cranked. THe last hard winter we had a few years ago I had one that used 2 filters in a loader and killed the batts and still never got it going and just went home. THese guys either get fuel every day if they buy it at a station or they have huge thousand gallon tanks filled every month or two at the shop that they pull from, its not like they got caught with August's fuel in February!
I add 2 stroke at 200:1 to my diesel. Make sure it meets TC-W3 specs.
http://www.jatonkam35s.com/DeuceTechnicalManuals/Diesel_fuel_additive_test.pdf