I care more about other people's mileage than my own. I'm so sick of being stuck behind some tool trying to "hypermile" between fillups that the "flow" is usually 30 mph in a 45. I see it all the time, every single day. If you can't afford your gas, take the bus. Don't slow down the world b/c you have to check your check register when you get to the Chevron.
Sorry, that vent was not directed at you.
But honestly, I don't care. I'd like to get better mileage between home and work b/c that drive isn't fun. When I'm having fun (weekends, nights, trackdays, autox, road trips), I don't give it a second thought. IMO if you're getting good mileage in a sportscar, you are wasting your sportscar.
I'd drive the new VW 200 mpg phallic mobile (prototype) to work if it were available. But when I'm trying to enjoy myself, I'll drive what is fast enough, sexy enough, and/or comfortable enough.
FWIW I've maxed out my OBC reading at 99.9 mpg going 80 mph in neutral down the grapevine (curiosity). I've gotten 7 mpg on the track. And I normally get 15-24 mpg around town.