I haven't put 1K miles on it yet, so this is early, but I'm averaging 24.5 MPG! I drive about 30 minutes through stop lights and about an hour on the highway each day. If I use the ECON mode and lay off the gas some, (cruising around 75mph on the highway), I get about 26mpg. One day I commuted to work and back, about 65 miles, took it easy on the gas and got 28.2mpg! Using nothing but 87 octane so far.