The analysis of a vehicle's mileage is a very important one. To understand why some vehicles need more fuel to drive one kilometer of
distance (the car's fuel efficiency), is a technical analysis.
Some reasons for bad mileage is weight of the car, the age of the car, the maintenance of the vehicle,
the traffic conditions, the fuel type and quality and the driving style. In general we can say that the calm and controlled driver can get better mileage.