I picked up my Q50S AWD Hybrid Monday. I topped it off and re-set the trip odometer monday night. I have 52 miles since then and my gas gage is reading exactly 3/4 of a tank left. So by those numbers I'll be getting about 200 miles out of a tank? anyone have any idea what's going on here? The computer says I'm averaging just over 17 MPG and the car has about 170 miles so far. Does something sound off?