Gas mileage fluctuation
My gas mileage has fluctuated quite a lot lately: After a 200 mile round trip staying at around 55-60 on rt 20, I got 22 mpg, and when I filled up today I got a mediocre 12.5 mpg after 120 miles of around town driving. Now I know the 4.0 isn't a gas sipper, but this seems pretty low for a stock wrangler. Is this kind of fluctuation normal? I have heard people speak of staying in open loop or something during short around town trips (usual drives are about 4 miles), could this be my problem? I know I need to replace my O2 sensor, and possibly my CPS (CEL comes on after ~15 miles, then goes off). I have searched the forum and know that different wranglers can get very different mileage, just wondering why it seems to fluctuate so much, I am a very conservative driver.
"If the ladies don't find you handsome, they should at least find you handy" -Red Green