Vehicle manufacturers make much of the fact that their products come equipped with extended-life spark plugs that can maintain a precise gap for 100,000 miles. However, before you wait that long to replace them, you should bear in mind that spark plugs that hit... Read More.
Why would it need to be changed? The oil in your car does basically 3 things: Lubricates: This is the obvious one. It lubricates by keeping metal riding on a thin film. That prevents metal parts from touching. If metal parts actually touched, they would seize pretty... Read More.