According to google, the cloud point of #2 diesel fuel is +15 Degrees F. or lower. The "cloud point" is the temperature at which the wax crystals begin to precipitate out of the fuel. Those wax crystals will plug the fuel filter.
Around here, diesel pumps have a sign on them that says it is Winter Blend fuel, with a Cloud Point of -18 degrees F. The sign does not say if the fuel is a blend of #1 and #2 diesel, or has an additive package to lower the Cloud Point.
google "diesel fuel cloud point" and read to your heart's content.
