Hi, I've had my S85D since August. Today was the coldest day yet; about 34 degrees. Normally when I drive I notice the average energy usage is about 250-325 Wh/mi. I have never seen it go above 350 unless I punch it and drive very aggressive. Today, I saw it go above 480 Wh/mi and consistently stay above 400. It eventually came down to the low 300s. Is this normal in cold weather? Since I live in New Hampshire I can expect temps in the single digits. I just thought I'd ask you folks whether this is normal. thanks in advance.