Its mostly due to idling and the fact your engine cools down quickly in this weather.. If it was warmer outside your engine would remain hot for much longer and would run more efficiently when running errands or making short trips. I found that because I idle my truck for about 10 mins a day and it takes a while to warm the engine to operating temp I get about 30% worse mileage compared to the summer.. Its a brand new truck so I doubt its due to lack of maintenance...
|