[MENTION=20232]I-Like-To-Bike[/MENTION], I know that way of looking at things, and I used to share it. But I've learned that almost everything is linear as I said before. The less you drive, the less frequently you need to replace it. So purchase price is related to number of miles driven. Insurance isn't quite as granular, but there are steps, so a little-used car costs less than a well-used car. Registration fees are not linear but they are not very significant compared with the other costs of driving.