Hello All, Ive had my Prius v since the summer. At that time I was getting easily 46-47MPG both city/highway. I noticed as we headed into winter that I am now closer to what the EPA has as 41MPG. Nothing has changed with my driving habits. Furthermore I would think that in the winter, the cold air would actually help the combustion engine out and would potentially eek out an even higher MPG but I am getting the exact opposite. I am getting gas from the same gas station and am using regular gas (87 octane). Anyone else exhibit this? Have any suggestions?