Temp last night were in the upper 40's B100 this morning no problems. This afternoon I added some kero to bring the stock tanks to about B80 in anticipation of lows around 30 Wednesday night. I do have a heated filter on the aux tank which has b100 in it. Also still have the stock fuel heater and its working. I told my wife to use the stock tanks in the mornings then when it warms up during the day, switch over to the aux tank.
Put a jar of what your running mix wise outside and check each am, you will start to get a feeling for the temps and clouding.
Most importantly, make/buy quality Biodiesel!
Rick H...