Well I've been a member or this board for a few years, but have finally just purchased my 2012 Prius IV (yeah, I know, it took me a while to pull the trigger). At any rate, I'm a happy new owner, and though I haven't put a lot of miles on her in the first four days of ownership, I can say that my overall MPG is 53.x (as per the vehicle's computation) driving entirely in ECO mode. I'll find out how acurate this is once I fill up (a couple of weeks from now?). I'm interested in learning more about techniques in stretching my MPGs, performing my own maintenance, and seeing what other fellow owners are doing to their Priuses. Thank you, T-P
