I average 20 to 21 mpg with mostly city driving and the 4 mile one way to and from town just out side city limit's on a rural road. And I do run the 6 speed through the gear's at about 4000 rpm on the shift in 1st and 2nd gear. I have gotten 24.5 running 80 plus on interstate and some city driving thrown in . And a best of 26.78 cruising on a rural road staying within the speed limit most of the time one weekend drive. I have almost 10,000 miles on my R/T now.