I'm new on the forum and own my first vw. i have 02 golf, 2.0 automatic. my fuel economy sucks. I'm only getting about 18 mpg. most of my driving is around town with a 30 minute wait in the school car line everyday. Still thinking I should have better economy. any ideas? the only code I have is an o2 senor I haven't got around to fixing yet. is this my problem?