Quote:
Originally Posted by kbass
Are you guys calculating mileage using the on board computer or by dividing mileage driven by gallons of gas? Having to go from liters to gallons is a pain... But that is the most precise way of getting the mpg. I do not trust the computers in the car to give accurate readings.
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I calculate my mileage manually, by dividing miles driven by gallons of gas added. For a full tank, the on-board computer is optimistic by about 0.5 mpg. People quoting the computer number for a 20 or 30 mile drive are fooling themselves. There is no way that is an accurate number.