Facts about diesel ideling
As the vast majority of 5th wheels are being towed by diesel trucks here is some interesting facts about idling and the myths surrounding it: http://www.in.gov/idem/prevention/2372.htm
Forum Discussion
You forget one thing about idling big rigs in cold weather. When the temps drop below low teens and especially below zero that oil gets very thick when the engine is off. Park in a truck stop in 0 degrees weather and shut it down and you probably can't start it the next morning. It flat will not turn over. It may not be warm the next morning but it at least will be running.
