Doesn't seem to matter whether its highway or city for me... I get around 15ish no matter what do. I have had all city driving yield 300-320 miles on a 20gallon (yeah, I run it to the limit) and I have had easy goin long highway drives with the same exact mileage. I'm used to getting crappy gas mileage as I have only had one car in my time to get good number... enjoy it!

TTYL!