I am sure I understand you fully. After refuel.... it is like averaging fuel econ over a small distance. I get 30L when I drive out and 7L when I go back home but it ain't mean anything! You are disappointed that you don't have good economy or because you are extremely anxious of increasing fuel consumption average when the car is idling? Change your driving style and see. The economy is best when the driving style suits it. I keep telling my wife there is no way getting 16L/100km from Kew to Prahran and back. She even get 16L from Kew to Doncaster. My message to her is, "use your right foot as few times as possible, even braking! Look at and judge the traffic, rolling and way better than stopping" It is how to use the right foot too.. I cane the car off the lights when I drive and get the 201kW fully used, but I cruise afterward and get 12-13L/100km in the 60-80 zone roads. Keep practising and you will get there. Oh and 95 RON fuel (Caltex or BP; not shell in Melbourne)