This is my second post, but I bought a 2006 Prius with a bad Hybrid Battery last Sunday for $1200. I had never driven any hybrid vehicle until I drove the car home last Sunday with the bad Hybrid Battery. Yesterday I had a guy who refurbishes Prius Hybrid Batteries come to the house and he swapped out my bad battery for a battery with brand new modules (yes I asked to see the date codes). Today I drove the car to work which is 26 miles and I averaged 57.8 MPG. I did not run the AC this morning because it is starting to feel like fall around here. I then drove the car home with the drivers side window down and when I pulled into the garage I had driven 49 miles and averaged 57.6 MPG. After I got home my wife, children and I drove to dinner with the AC on and I put about another 30 miles on the car and I was still averaging over 56 MPG when I pulled back into the garage. My commute to work is probably 90% highway and 10% city. I noticed around 73 MPH the car almost feels as though it goes into overdrive (I realize it is a CVT transmission and they do not have overdrive) and the instant MPG was actually significantly higher than when I was driving a modest 55-60 MPH. Am I a natural hybrid driver or is this car a freak?