Originally Posted by Penguin

P.P.S. If you park your diesel outside overnight, start it in the morning when the temperature is 5 degrees, drive it a mile to the Interstate, and then start driving on the interstate, do you know how long it takes for the engine to warm-up? I do, as I have been logging coolant temperature vs. time data via the OBD-II port over the past few thousand miles. Care to take a guess?