Most diesel is not blended anymore. Most diesel uses a chemical additive to stop jelling. In severe cold climates (Canada, Alaska, very north US States) additive and #1 is used to stop jelling.
What? I would have farmers and truckers screaming at me if I didnt have straight #1 fuel and at least a 50/50 mix in our tanks at the COOP. This is in central MN and NE SD. Maybe its different down there. Unless things have changed in the last 5 years since I have done this