Your block heater is your friend when it's 45F or below - the difference in starting is astounding. I'd hook it up and give it a try -
Having "instant heat" in the car (or close to it) is another advantage -
I'm not sure if the winter fuel conditioner for regular diesel does anything for BD (or if it'd even work with it) - I used to add that to mine when it was cold (below 20F or so overnight) - seemed to help.
Best of luck
Steve
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