I may as well post my usual mileage. These are the cars that I currently have.
2002 WRX, 24 mpg (best was 29, but while driving through Indiana & Ohio, all hwy)
1989 Acura Integra, 28 mpg (best was 37, 10 years ago, driving to Fl, all hwy)
1994 Mazda Miata, 27 mpg
1995 BMW M3, 24 mpg (best was 29, driving all hwy)
2004 Honda Accord V6 (wifes car), 20 mpg (best was 32 all hwy)
I have commuted in all but the M3 (garage queen). My driving is typically 75% hwy, 25% city driving. This is all accomplished at speeds up to 75mph.
I know I should slow down, but I am just keeping up with the traffic. I would like to get a car that would get me into the high 30's while driving 75 mph on the hwy. I drive approx 30,000 miles a year.
I am tired of this kind of fuel economy, and am open to buy another car that would acccomplish this.