I have run heavy trucks 2.4 million miles and CAT and Cummins can both go stick their advice. Even with the truck running, had a 500 HP CAT which was supposed to feed hot fuel into the right tank, drawing it out the left tank and supposedly circulating it via a crossfeed tube between the bottoms my fuel line froze and I was stranded in Wy on I 80 in -12 windy weather. I walked to a store, bought all the Power Service they had and thawed it enought to run 30 mph for 50 miles. It was a cold lesson and I always use Power Service in the winter now.