(1) 1.6L MT (gas) Daihatsu Feroza - 8-10.5km/L
(2) 2.3L MT (diesel) Land Rover S2A 88" - I don't measure this as it is used purely for offroading trips.
(3) 1.5L MT (gas) Honda Civic LX - 13-15km/L
(4) 1.3L MT (gas) Mitsubishi Lancer EX - 14-15km/L
(5) 1.8L MT (gas) Toyota Revo - 9-11km/L

Mods: Simota Air Filter on the Feroza. All others are bone stock. Fuel economy numbers reached purely through driving behavior.