I really like the comments of your all and it make me laugh a lot early in the morning. Really !!
Well, Samialvi's observation is totally perfect. Yes, these are instantaneous fuel mileage that changes every second.
In my many previous posts I've already mentioned The average mileage of my Passo is
14 KM/L within City
17 KM/L on Motorway with 110~120 KM speed
20 KM/L on Motorway with 80~90 KM speed
Within city average will increase further in Winter when A/C will be turned off.
Also, am using 185/65/14 Tires. If I use 165/65/14, then this fuel consumption will be less even further.
The bottom line is, Japanese Cars are very much fuel efficient but if driven with "soft foot" (means don't push the accelerator hard for instant acceleration).
All the best !!