How to Measure Real Fuel Economy with the Full-Tank Method

Use consistent full-tank records and odometer readings for a more reliable mileage estimate.

A single partial refill cannot accurately tell you how much fuel was consumed since the previous stop. The full-tank method compares distance travelled between two consistent full fills and divides that distance by the fuel added at the second fill.

For example, if the odometer increases by 480 km and the next full fill requires 34 litres, estimated economy is 14.1 km/L. Variations in pump shutoff, slope, tyre pressure, traffic and driving style mean one result should not be treated as a permanent vehicle rating.

VehicleWiseHub labels mileage as insufficient until there are consecutive full-tank records with valid odometer progression.