[savefuel]

I installed a SIGMA bike computer (ca. USD 49.-) with a magnetic sensor attached to the left front wheel for accurate speed and distance reading. The bike computer (operates on one CR2032 battery!) not only accurately displays speeds up to 199,5 km/h or 124 mph but also the exact distance driven (of course the circumference of that wheel has to be properly measured and inserted into the bike computer!).
During EOC with ignition in intermediate position, your car odometer will not add mileage which means your car might achieve a better resale value. I currently do 10-15% EOC -but- depending on the vehicle (stickshift subcompact with easy technology!) this value can be pushed to 40%plus by expert hypermilers...