The number of people in the United States that work on their own automobiles continues to increase. This is evident by the continuing number of auto-part stores that are opened every year. New stores, new chains, the competition is fierce. One reason for this is that the cost of taking your automobile in to the shop, to change something as simple as a $10 gasket, can be very expensive. It could end up costing you a couple of hundred dollars do to labor. Labor can make up anywhere from thirty to ninety percent of the bill. The other problem is ....