Pros and Cons of Copper Spark Plugs
Copper spark plugs contain shells, insulators and electrodes. The shell in each spark plug seals the combustion chamber. It is also used to install and remove the spark plug. The insulator is designed to enable the ignition voltage to ground only across the combustion chamber gap. The insulator also forces the heat produced in the combustion process into the cooling system. The electrodes conduct the spark into the combustion chamber.
Pros of Copper Spark Plugs
The combustion process of a typical spark plug creates chemical reactions which can corrode the plug. Copper spark plugs contain a copper core in the middle electrode. The copper reduces the temperature level of the tip as well as the development of corrosion. This aspect of the copper core enables this type of spark plug to last longer. Copper spark plugs are available for all domestic and import vehicles. The purchase of many copper spark plugs also includes an unlimited mileage warranty.
Cons of Copper Spark Plugs
Many copper spark plugs have preset standard gap sizes. In some cases this can produce a weaker spark. You may need to use a gapping tool to widen the gap in order to increase the efficiency of the plug and improve the mileage of your vehicle.