In Minnesota, do a two-tank or (as the don suggested) biodiesel.

The primary problem of one-tank conversions is sufficient heat upon startup. Electric heaters will only go so far.

Let's imagine that you DID somehow manage to heat the oil to 140F right on startup: the engine itself it infinitely larger than the fuel being injected, and thus your fuel will be cold the instant it touches the cold engine.

Think about it. I am a proponent of veggie conversions, and in some climates a one-tank is reasonable. Ehemmm.... not in Minnesota.

__________________
'79 300SD
'82 Chevy Chevette diesel