Why is cold weather an issue? If you're thinking "diesels don't start in the cold" that's absolutely not true.Not true today,at least (I guess it could have been true long ago).
I've started three different diesels in *very* cold weather.My BMW 335d (6 cylinder diesel) started at -20F.My Mercedes E350 Bluetec (6 cylinder diesel) started in -40F.My BMW 328d (4 cylinder diesel) started at -30F.
All three occasion were in a small town about 200 miles north of Montreal.And all three times the car sat for 12+ hours at -20...-30...or -40.
Why is there a diesel #1 and a diesel #2 then?