I just bought this in the fall. I get 19 or so when I drive 250 miles to Denver over the passes, but now it's winter and around town I get 10-12 MPG. It is just block to block stop signs, traffic signals, short trips of a mile or two here and there--not reaching or sustaining full operating temperature all the time.
It seems to run fine. A mixture of open road and city driving yields--as expected--14-15 MPG or so.
I admit--sometimes I like to step on the gas and feel the results. I'm not shy with the throttle, but I'm not a maniac either.
Dave