Don't underestimate these trucks. Mine started this morning just fine on one cycle of the plugs (key on wait for WTS light to go out then start immediately after) and it was supposedly -4 here last night. I haven't had a working fuel bowl heater in probably a year and I did not have a block heater plugged in. The truck was parked in its normal parking spot no garage no nothing just nosed up to the snowbank at the end of my driveway. It ran a little shaky for a minute. Not romping just shaky then smoothed itself out in about a minute and it was good to go. And that was on fuel with no Diesel Kleen in it and the truck hadn't moved in 2 days of temperatures like that.

Just my opinion that people underestimate what these old trucks are capable of if you treat em right and work em like they like.

Edit: let me add that I don't recommend running no additive or not plugging in when temperature dictates. Just expressing that these trucks are capable of more than a lot give credit for.