Hey guys, yet another question... I've been getting fairly average fuel economy lately; around 550kms to a tank of 98. (Car is an n15 series two sedan with a GA16 engine) However I have only gotten around 290kms to roughly a full tank this time. I don't thrash the car, the o2 sensor is new, fuel filter and air filter aren't very old, around three months, and the engine oil and filter were changed this weekend just gone. Is there anything I'm missing that could contribute to better fuel economy? The car has done a little over 170,000kms. Any insight would be helpful, cheers!