I know this thread is old, but I just want to share my experience.

Jazz GD 2005
Driving attitude: 'Right lane'

Daily travel home to work
= 40km ** Twice a day ** 5 days weekday + ~1 day weekend jalan jalan
= 40km*2 times*6 days
= 480km weekly travel

Weekly refuel = ~RM75 (I only refuel when empty and always refuel full tank)

Cost per km = RM75/480km = 15.6cent per km

The other thing I want to share is that I don't find driving fast or frequently braking really make any difference.