I've been trying to optimize. I don't drive like to terribly slow. I've been getting a consistent 31+ MPG in my '94 Integra with mostly city driving, a few minles on the interstate during the weekdays. Not bad for a car rated at 24 city/30 highway. I shift around 2300-2500 RPM. Used to be I never go over 3K RPM, now I very rarely go over 2500. I'm in 5th gear by around 35-38 MPH. It's fucking great. Oh, and I never use A/C, never have. I always, always rev-match, and am very often in neutral. I'd say about 12+ miles per tank are done in neutral altogether. I try to maintain as much speed as possible through cornering, so I take those as best I can.