When calculating the fuel consumption you wish to have the most accurate results. Absolute accuracy (hello mathematics) we did not achieve, but to approach it the following tips will help.
Here are tips for liquid fuels (gasoline / diesel / alcohol, etc.)
- Full tank refuels rather than records of checkpoints, monitor the level of fuel in the tank depends on the position of the car (on the slope), temperature, and visual acuity by using checkpoints
- If you can refuel yourself, then try to fill always the same – to the first click or until the “overflow”.
For gas fuel (methane / propane, etc.) are exactly the opposite:
- The gas has a different volume under various environmental conditions (depending on temperature, humidity, air pressure). Because filling a full tank may surprise – at different times of the volume of a full tank may be different. Consider these changes is difficult because highly do not recommend using the token “full tank” or “Specifying the residue” for refilling gas. Use the “checkpoint”.
- Adding waypoints (records with the date and mileage) significantly increase the accuracy for the residue of the forecast fuel and corrects the average data statistics.
- Theoretically, for a very large measuring period – several months or even years, local fluctuations in the tank do not matter – the average consumption does not depend on the accuracy of measurements.
But! Precise measurement of fuel consumption will allow you after a time to identify the ‘bad’ gas stations which create unexpectedly expensive refueling cost.