personally i've averaged 23.5 mpg all city driving on one tank, but that was with driving like an old granny all over the city and rarely ever going over 2k rpm, as far as highway the longest trip i've been on is a trip from santa ana, CA to kingman, AZ and averaged around 27 mpg going 65 to 70mph most of the way and uphill most of the way at that. second longest round trip i've made is from fullerton, CA down to san diego and averaged around 32 mpg on that trip, definitely better than expected mpg than what nissan estimates it gets
