Back east I could get: 26 city, 34 highway. In California: ~22 city, 27-29 highway. I think the drop is mostly due to the more mountainous terrain, morning traffic, and trying to keep up with everyone else in Socal that seems to floor it from every stop sign/light for no good reason. There probably wouldn't be so much smog if everyone stopped the jack-rabbit starts!
Anyways, 5MT, just regular maintenance by the book, nothing special. Most range I ever got was Westminster, MD to Bristol, TN. 410 miles and it was between 1/4 and 1/8 tank.