Lately, I get about 20 - 21 MPG mixed city / highway, and -not- driving like an old lady...

My drive is 16 miles each way, mostly flat, with about 2 miles of freeway. Elevation here is about 640 feet. I can drive with the AC off (that time of year finally) so that probably helps too.

I have a 6MT 4x2 S with 4200 miles on it. I shift around 2k rpm's except when getting on the freeway - then just depends on what I'm getting into - sometimes keep in 5th at 2200 2300 rpms till around 65 mph, until I get to cruising speed and hold in 6th 2100 rpms at 70 mph.

On regular roads 30 - 45 mph I cruise in 5th or 6th, and keep my rpms around 1200 - 1800 depending on the angle of the road (hills here are more like unlevel surfaces), usually going about 5 mph over the speed limit.