Unlike much of the USA, North Carolina seems to be a big drain on my new Prius. I believe it's because of hills, absolutely everywhere you go, you are going up or down a hill. Going down a hill does not seem to charge the battery well because you must always go up a hill shortly after, and into the red. Looks like I am getting about 35-40 MPG average so far. Does anyone have any experience maximizing your mileage on hill after hill?