Always better to repair a car unless the cost of repairs comes to about a third or more of the car's current worth. Otherwise it's more cost-efficient to 'driv

Always better to repair a car unless the cost of repairs comes to about a third or more of the car's current worth. Otherwise it's more cost-efficient to 'drive them into the ground'. Just because a car has more than 100,000 miles on the clock is no reason to get rid of it. If it's still roadworthy and has a million miles on the clock, just keep on driving it.