Iridium spark plugs are the best choice for high-performance engines, while platinum plugs are ideal for commuter cars and ...

Laser Iridium spark plugs are made by NGK for OEMs. They use a combination of iridium and platinum to increase efficiency and ...

Replacing your spark plugs is important and usually a fairly simple process, but if they seize in the cylinder heads it's an entirely different matter.

Engine behavior changes as spark plugs wear, with symptoms like misfires and rough idling. But what causes them to wear down ...