Couch, if you were asking me, I have had a hybrids since 02, I have been teaching myself how to drive for better fuel Economy since then. While I am no Hypermiler I think I do rather good. Especially since I take so many long expressway trips. I take an extra 20 minutes to get to work because I can get 75MPG on a great day vs. the shorter way that gets me only 45MPG. So to answer your question if you get crazy about mileage you can do better then the average. But watch out your friends and family might stop talking to you as you base your day based on your mileage to and from work.