How to Use Different Modes to get best performance

Comfortable riding. Issue with music touch pad as it crashes many times. Huge Panoramic sunroof. Average on the highway reached 25.2 km/l. Got 900 kms on tank full approximately 21 km/l city plus highway. For moderate traffic on highway go with city mode for easy overtaking and best performance. For 2 lane roads go with City or sports mode. For fun feel like SUV, go with sports mode. Within city go with city mode. I got 21 km/l with all above. Speed ranges from 80 to 100 km/h Mostly around 90 km/h. On empty highway 100 km/h.