Turns out, letting your car idle for 10 minutes on a cold morning is totally old-school and just wastes gas. Modern cars only need about 30 seconds to get going—enough time for the oil to circulate. Letting it run longer doesn’t help and can actually cause wear and tear. Save yourself a tank of gas (and some cash) this winter! Only exceptions: super old cars, extreme cold, or if you’re towing heavy stuff. Stay warm and smart! #Transportation #CarHacks #WinterTips