Posted by mark b on September 27, 2006, 1:02 pm
With a 0.1 mile accuracy on the odometer, you would only have to
measure 10 miles to have 0.1% accuracy on the measurement. This would
also be enough distance to over-ride any error from taking the
measurement while moving and having to judge the stop and start points
on the fly. If you are off by 4% after a 10 mile trip, I would agree
that the odometer is off - or the mileage markers are off.
Carpe Diem wrote:
Posted by Carpe Diem on September 27, 2006, 1:33 pm
I agree, and as I cannot imagine that ALL the mileage markers (along
different highways) are off, I guess it's the odometer which is...
Posted by Bill on September 27, 2006, 5:41 pm
We know this much: Since you have new, OEM tires, it should be off 2%.
When they are worn out, it should be off 2% in the other direction.
Posted by Bill on September 27, 2006, 5:40 pm
But Mark, aren't you assuming less than a 1% error in mile marker placement
and ignoring tire wear and the attendant +/- 2% error? If the tires are new
(2%) and the markers are off (1%) and if readings are taken on the fly, 1%
after a 10 mile trip is meaningless. Tire diameter is significant to such
an extent the Nav system includes a recalibration procedure to be performed
in conjunction with installing new tires.
Posted by NeoPhyte_Rep on September 28, 2006, 2:52 pm
Could this also affect the MultiFunction Display of Miles Per Gallon?