let me revive this topic,
i've been monitoring my kelisa from the day that i collect it from perodua in 2003, here is my summary
1) Model : Kelisa MT 2003
2) Petrol Used : Petronas/Shell
3) Engine Oil Used : Castrol Semi Syntetic
4) Fuel Consumption :18km/l (average), 20km/l (best)
5) Driving Condition : City driving(inanam to kota kinabalu- search in google earth for route)
6) Average Speed/rpm : 60km/h, rpm not sure
7) Max Speed/rpm : 80km/k,
8) Latest mileage: 146000 km
9) Modification: 13" standard rim

my new persona MT, just come out today(still virgin, he...he...)
1) Model : Persona B-Line 1.6 (M) 10
2) Petrol Used : dunno/SA refill it
3) Engine Oil Used : dunno
4) Fuel Consumption : from AFC display, 6.8l/100km or 14.71km/l
5) Driving Condition : City driving just done 20km journey ha...ha...
6) Average Speed/rpm : 50km/h, drive slow2, maklumlah masih dara..
7) Max Speed/rpm : 80km/k,
8) Latest mileage: 52
9) Modification: 15" standard rim

did you calculate it manually or from AFC reading?
its about 7.2l/100km if i convert from your data.