My wife's '05 Prius has 1100 miles (not even broken in yet) and last week, we drove it 186 miles. Filled it up today until it clicked (that's how I always fill up) with 3.1 gallons - exactly 60 mpg. Ran the a/c 90% of the time, I borrowed her Prius one day since I had a meeting downtown: the first half of my commute that morning was on a highway that was bumper-to bumper, no a/c (the MFD screen was telling me that each 5 minute segment was running between 75 and 95 mpg on that stretch), and the tires were set at 40/38. Simply amazing! My relatives, friends and neighbors keep congratulating us on our excellent timing - we sold her van and replaced it with the Prius the end of July. Until this week, we've been averaging between 50 and 52 mpg on each tank.