Echomodder: No, I don't have a scangauge, but maybe sometime. However, in the past few days, I've been trying to watch my tachometer and see if I can get the automatic transmission upshifts to happen at lower RPMs by letting up on the accelerator at the right times. If someone is right behind me at a light, I don't accelerate *really* slowly for civility's sake, but if I pay a bit of attention, I can usually keep the shift points below 2500 (often below 2100 RMP), instead of the more typical 3000 to 3500 if you step in the gas in a fairly normal way. I hope that after more practice, I'll be able to feel this without looking and it will become second nature to keep the upshifts at low RPMs. I know the scangauge will provide more direct and varied feedback, but at least the tach shows me how hard the drivetrain is trying to produce power.
Lower average tach = lower power produced = less gas used.