







Selecting the heat range of a spark plug is not a performance upgrade. It is a combustion tuning decision that affects engine reliability. The heat range controls how quickly the firing tip sheds hea...
Picture a 2020 sedan with 65,000 miles. The engine still runs, but you notice a slight drop in fuel economy and the cold start takes two cranks instead of one. That is usually the first subtle sign t...
A spark plug does one essential job: it generates a high-voltage arc that ignites the air-fuel mixture inside the combustion chamber. That explosion creates the pressure that pushes the piston downwa...
Spark Plug Indexing: The Short Answer Spark plug indexing is the deliberate rotation of a spark plug so that the open side of its ground electrode points in a chosen direction inside the combustion c...