Should you warm up your car before driving in cold weather?

As the winter weather continues to deliver snow in many areas, energy tips for your car may be helpful.  My nephew sent me this picture of the roads he is driving in PA.    TheDailyGreen addresses the questions of the need to warm the engine before driving.  Learn how to save money and warm your car engine the most efficient way….

Photo credit: Chris Nass, Article: TheDailyGreen