IL to Las Vegas,NV

I almost got stuck in Flagstaff one winter when I overnighted there after traveling west out of TX. Problem was I had TX diesel in my rig (non winterized) and it was WINTER in Flagstaff. Got up, broke camp and the diesel engine cranked and cranked after pre heat and finally started. Ran very rough as it starved and tried to run on freezing diesel. I limped down to the nearest gas station and filled my tanks with winterized fuel. No further issues after that as I headed North to Washington.