"James C. Reeves" > wrote in message
...
> When you register, I think the web site provides a question that asks you
> what your normal annual mileage is. At least that is what I remembered
> when I registered. The site is probably calculating your current mileage
> from that. I'll post this to the GM NG...someone there may know more
> about this. Although you do raise a interesting question.
>
> "Bishoop" > wrote in message
> ...
>>I registered my Buick on the GM web site when I purchased it new about
>>2-1/2 years ago. I checked the web site today for the very first time
>>since registration.
>>
>> To my surprise they pegged the mileage on the car within 100 miles.
>>
>> I have the OnStar package but do not subscribe. Are they monitoring the
>> mileage via this link or do they have a "very good" algorithm that can
>> figure it out. I haven't had the car into the dealer in over six months.
>>
>> Just curious.....


As you suggested, I did supply my normal driving habits when I signed up.

To only miss by 100 miles out of 32300 is only 0.3%. That's pretty darn
good. Now if GM could only manage their company that well they'd have
something!!