&gt; I&#x27;ve always been told that mileage--not time--is the main variable.<p>And my experience is exactly the opposite. I have never had a car die from mileage. I&#x27;ve had several die from time.<p>In my experience cars last about 10 year, 15 if you are careful. How many miles you drive during that time is mostly irrelevant.<p>Personally I think cars should track hours when turned on, not miles.