I also have same situation as your. Recently i just convert my kancil to l2 turbo. The first that you must do are change the exhaust system. This will reduce fuel consumption significantly with give you more torque. Second change your way of driving. Third tune your gear and computer suitable with the way that your driving
Before this i just try to speed using my kancil at highway. You guest what, 1 fuel tank only can sustain 200 km (5000 to 7000 rpm/ minutes)around 160-180 km/h. But when i change my way of driving (least of 4000 rpm/ minutes) it saving a lot of fuel. around 330 km only rm 35 fuel consumption, so my car can go more 500 km per full tank.
Before this i just try to speed using my kancil at highway. You guest what, 1 fuel tank only can sustain 200 km (5000 to 7000 rpm/ minutes)around 160-180 km/h. But when i change my way of driving (least of 4000 rpm/ minutes) it saving a lot of fuel. around 330 km only rm 35 fuel consumption, so my car can go more 500 km per full tank.