If you are in an area where you have a local bulk fuel dealer, you may want to invest in a clean barrel and hand pump and get 55 gallons from the bulk dealer. He will have the blend that's right for your weather. Unless you are doing a lot of winter work 55 gallons should carry you. If not, take the old barrel back and get it refilled.
Our Co-op dealer never let us down in Northwestern Colorado. Our temps got down to 50 below and colder. The diesels we had, D-2 Cat, Ford 861, Case 830 and JD R all ran just fine.
One thing you will need to do is change your crank case out to a lighter weight oil. My experience was before mutli vis oils and we ran 5 wt so we could get them to turn over. You may want to use Shell Rotella 5W-40 in the winter. Wal Mart and Sams carries it.