Collect comparable fills
Fill until the pump stops automatically, record the odometer and keep the receipt. Do not keep topping up after the automatic stop. At the next comparable fill, record litres and distance. The distance travelled corresponds to the litres you are now replacing.
Use the right formula
Litres per 100 km = litres filled ÷ kilometres travelled × 100. Using 36 litres over 600 km gives 6.0 L/100 km. The Nordic unit 'mil' means 10 kilometres: the same consumption is 0.60 litres per mil, not per English mile.
Turn consumption into cost
At an example price of 22 kroner per litre, 6.0 L/100 km costs 1.32 kroner per kilometre. A 150 km trip uses about 9 litres and costs about 198 kroner in fuel. Tolls, parking, insurance, maintenance and depreciation are excluded.
Measure several fills together
Add litres and kilometres across comparable periods, then calculate their ratio. Do not simply average consumption figures from journeys of very different lengths. Keep commuting and long-distance driving separate if that helps your planning.
Keep a useful log
Date, odometer, litres, amount and a short note are enough. Record roof boxes, trailers or frequent short trips. For a plug-in hybrid, include electricity consumption and charging costs when calculating the full energy cost.
Heading somewhere?
Take MileHalo along.
Find stations, compare reported prices and see road reports. Check current prices and conditions before choosing a stop.
See MileHalo in the App StoreEnglish edition, 15 October 2026. Norwegian regulatory sources apply to Norway. Check local rules and your vehicle handbook. Figures are examples, not live prices.