Please let us know;
Which engine oil
What's the air pressure in tires
When was the last tuning done and what was performed
Check this;
Air filter- if dirty, get it cleaned using pressurized air. If it's still dirty and lost it's color, replace it.
Do this;
Keep RPM under 2500
Try to hypermile as much as you can
Keep tire pressure 33 front, 30 back. I personally keep 34 front and 31 back.
When starting on cold engine, let it idle for 30 seconds, then drive the car slowly and gently- When Idling, you get 0 km/l. Do your best to keep RPM's as low as possible, but avoid lugging the engine i.e don't change to 3rd at 20km/h.
Most damage to engine is at startup and when revving cold engine.
Share the method you use to calculate fuel average- I am astonished to see that low fuel average!
Last, but not least, Mubarik and MashAllah on new car, welcome on board SS club:)
You will have to call Suzuki dealership and confirm. They might give it on special bookings.