In most places in the northern tier states, ULS Diesel has a summer and winter blend as well. Winter blend has anti-gel additives and #1 Diesel added to the blend so it flows better in the engine. I understand summer Blend has anti-algae additives and stuff to keep water in suspension.
You can burn Winter Blend in the summer, but the reverse is not true when the temps get below freezing.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW