From the land of snow and cold...I have photos of my back yard thermometer from the third week of Jan, 1994 or 95...the reading is 28 to 30 below zero. That week was 20 below or more for the entire week. First time in forever I heard of a school in MN or WI being closed due to cold. Cars were not starting. Most was due to fuel system problems and oil you could stand a pencil in. Mn is always running nights well below zero. Be sure to check your antifreeze and all will be well. You will have more problems with your thermostat, battery, oil, carb, plugs,...and a cold nose. 15 degrees is balmy!!!!The folks from Northern MN are probably laughing at my readings of 30 below.