For awhile took some adjusting on my part because I often made the error of having the gearshift in the "sport" mode and was overtaxing the gas mileage by doing so. When I finally corrected that (grateful to my salesman for that) I simply shifted the gear to the correct position and that made all the difference. Being this car is an AWD and has the turbo feature, it handles all the roads very smoothly. Can even drive quite fast and wouldn't notice the difference. Not sure whether having a 5th gear would make a difference as many others have commented about. The factory installed radio is weak but I experienced the same thing with my last car, a Volvo.
Driving at any speed and on any terrain, rear view mirror(good because it cuts out glare from vehicle lights behind). Like the turbo too.
A 5th gear if in fact that would improve the gas mileage.