Boy do I feel fortunate. Just bought my 1028 and we get hit with -2F and colder weather. First attempt at a start this cold was a chore but I got her figured out. The last two cold starts have been relatively easy.
I'm actually a bit amazed at how well this thing starts in the extreme cold. I think it runs better at start up than my 7.3 did.
Lesson #1 , if the starting procedure calls for you to floor it while cranking it is not just a suggestion ... it is mandatory!
PO had installed a manual GP switch but the "wait" light still works so I time the light and repeat the gp cycle one more time then crank. (2 gp cycles in total)
First thing I will do is swap out the oil to 0w-40 syn. , that was the single most important thing I did with my 7.3 Powerstroke to help cold weather starting.
Otherwise , item #1 is to be sure your GP system is operating properly , then do the heaters.
I really think sharecroppers advice that warming the oil is probably more or as important as warming the coolant.
I might try the oil heater first just to test the theory.
