Assalamualikum. I have Daihatsu Boon 2006. I have a serious issue regarding fuel consumption. On the odometer it is showing 8.6-8.9 Km/L . I have calculated its average manually as well and it is coming out almost same. Changed the engine oil(Shell helix 5W-30), air filter, oil filter, cabin filter recently. Transmission oil is fine. Tyres are 185/70/13. Kindly tell what might possibly be the issue. Engine is fine. No white smoke. 94,000 Kms done.