Huaudi listers, My wife's 100 2.0E Auto avant uses fuel at the rate of 26 to 27 mpg no matter what sort of driving. Is this about right for this car? Or am I looking at a bad O2 sensor or bad cat, the car runs fine with no problems other than the small fortune it costs us to run the damn thing. Any advice or am I stuck with a big fuel bill. TIA Iain