Spark plugs operate in an extreme environment of high temperatures and high
pressures. Over time they degrade and become less efficient.
What happens if they are not changed?
A powerful electric spark is needed to ignite the mixture of fuel and air in your
engine. If a spark plug is used too long it is less able to ignite this mixture,
leading to an inefficient engine and lack of performance. This can cause potential
engine damage and means you use more fuel.
What do we do?
We remove the spark plugs from the engine, inspect them (they can tell us a lot
about how your engine's performing) and replace them with new ones.
How often do they need to be replaced?
We replace them at every major service.