Hello all! I have an 06 F350 with nothing done to it. I run 5w40 syn. I work a 24 hour shift and now the temps here are in the 30s or below. recently the truck started to not start Right up. I will go out and turn the key wait 2 or 3 min and try to start, it will crank and sound like it wants to start( white smoke now coming from the rear) and nothing. After about 3 to 4 times of this it starts right up and idles fine. When I'm home i plug it in and it starts right up with no issues? Just replace my batteries with Die hard platinums.

 

In cold temps like that, it helps to cycle the glow plugs 2-3 times to help with starting.