Hi, My 03' Corolla averaging 24miles/gallon on the premium gas. Not much better than my sister's SUV. Three different mechanics all said it's running in a "super" condition. It had 21K miles on it. It’s pampered by Mobile 1 oil change every 3k, transmission oil change at 20k, Tire rotation/balance every 4K. Oh, I drive it in suburban of NYC (about 40miles/hours speed). On the Toyota official web, it should do 30 cities 40 highways. I am paying $207/gallon, this could add up in a long run. Any Corolla owner has the same problem? Or this is normal?