How is the mileage left until empty tank, showed on the instrument panel in my Volvo S80, calculated?
The mileage left until the tank is empty changes constantly when you drive in order for you to always have an updated figure on this. The mileage left is calculated on the 20 km (about 12.5 UK miles) , which means that it will of course differ when driving in urban and rural areas. The average fuel consumption, also shown on the instrument panel, is not calculated in the same way (see other question).