16 MPG for City Driving may not be too bad. Depends on how long you stay stopped at stop lights where you are consuming gas and not moving.

I tend to see 5 MPG full throttle 10 - 15 for average acceleration.

I also get about 10 mpg for 1st gear, 15 for second, 20 for third, 25 for fourth and 30 in fifth gear.

Coasting is more than 99.9 MPG, the trip computer won't actually count the actual mileage.

If I do some math in calculating the percentage that I spend at each gear it comes about right. Example 60 mile commute, 40 of those miles at fifth gear driving, 10 miles at second gear freeway traffic and 10 miles in the city (15 MPG average.) That is 66 percent at 30 mpg, and 33 percent city and freeway traffic at 15 mpg. (30 MPG * .66)+(15 MPG * .33)=24.75 MPG average. This was my commute last year and I was getting about 25 MPG.

Theoritically, if you accellerate to 70 MPH then coast to 20 MPG then accelerate back to 70 MPH and you were spending half you time accelerating at 15 MPG and the other half coasting at over 99.9 MPG. Mathmatically, you should be getting more than 60 MPG. Not really practical but does defy the fact that stop and go uses more gas.