I found this using a Google search:
"The Cloud Point is the temperature at which paraffin, which is naturally present
in #2 diesel fuel, begins to form cloudy wax crystals. When the fuel temperature
reaches the cloud point, these wax crystals flowing with the fuel coat the filter
element and quickly reduce the fuel flow, starving the engine. Typical cloud point
temperatures range from: -18°F (-28°C) to +20°F (-7°C), but may occasionally
be as high as +40°F (4.4°C). #1 diesel fuel (or kerosene) contains very little
paraffin, and therefore has cloud and pour points near -40°F (-40°C)."
There is more to read at this site. If you want to read more, then go here:
http://www.todaystrucking.com/images/SolvingWinterDieselProblems91-1R2.pdfIt appears from my Google search there is considerable reading material if you wish to spend the time. Another suggestion might be to ask a local retailer of #2 diesel what the "cloud point" is for diesel sold in your area. In Eastern Oregon where I was born and raised and worked for most of my career, diesel and heating oils were routinely winterized from early Fall through late Winter.