I am planning to keep my car forever!!! And I agree, that of the many things there are to worry about in the world.....this is not one of the major ones........but here goes:

The odometer is electric.....if, say, the battery goes dead ....does the odometer reset?

No? Then how does it "remember" what the right numbers are????? I am petrified that once my beautiful car turns 300,000 miles or so......I will walk out one morning and the odometer will read '0000000'!!!

Dumb question, I know. But I am curious about it.