Quote:
Originally Posted by davesrave
More interesting info, Thanks again. Don't know how they handle tire wear, but my new to me Boxster's computer asks what size tire your running, and weather it's a winter or summer tire.
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Yea, I've seen that on some trucks. It would still be marginally impacted by tire wear in theory, but really not sure its enough to matter. Technically, that would impact manually calculated fuel economy as well.
If the odometer calculation is based on new tire circumference, and your MPG was constant, it would "improve" as your tires wear down. Sometime I may look at my mileage, which I have tracked from day one, and see if I can determine a trend up as tires wear, and a reset with new tires.
If the odometer is set on a "medium wear" tire then at full depth the odometer would run slow, reach actual, then run fast as the tires wear.