I bought an '08 S and have been getting 19 or 20 MPG. I rec'd some feedback on this forum that advised me to replace the spark plugs and O2 Sensor, which I did. I just measured the mileage again and it's 21 MPG, hardly what I should be getting.

Has anyone experienced this with their S and if so ... any recommendations?

 

Go lighter an the throttle pedal.