I have had my 2005 for nine days and I love it. My question is about mileage. So far (in 500 miles) I am averaging 42mpg. Is this normal for a new Prius, and how can i get it higher? I really try not to use the AC (it's still quite warm here in California) and to go light on the accelerator. I mean, 42 is great, but I was expecting more.