I'm lucky enough to live close to home. I drive 4 miles one way, and I come home for lunch everyday. That mixed with a bit if highway driving gives me about 300 miles per tank, which is 18gal, right? the best that I have seen is 360 miles to one tank, all highway driving, 75-85 most of the time.
I average 21-23 mpg city On a recent trip to Georgia I got between 26-29 mpg doing 80mph. I had only gotten 26 mpg once in my car on a trip to Florida 3 years ago, when I first bought my car. Yea for Mods!!!