I used to have a ~20 mile highway commute to work every day. Back then, my average MPG was around 23-25. Now that I work 3 miles from home and drive through morning downtown rush hour I'm lucky to get 15mpg. When my Vanos went out a few months ago I was seeing 8-9mpg for a while lol.
My old Jetta got around 40mpg on mixed city/hwy which I sometimes miss, but I didn't get this car for the gas mileage
My husband's tuned/modded Challenger RT gets better mileage than I do, haha.