Are Car Spark Plugs Universal?

[VonKimberly]

Car spark plugs are not universal. Each brand of spark plug has a corresponding heat range suitable for specific vehicle models, so it's crucial to ensure the heat range matches your car model when purchasing. Otherwise, it may cause varying degrees of impact. The heat range of spark plugs is indicated by numbers ranging from 1 to 9, where 1 to 3 represent low heat range; 4 to 6 represent medium heat range; and 7 to 9 represent high heat range. Most passenger car spark plugs fall within the 5 to 7 range. The function of a spark plug is to release the high-voltage pulse electricity delivered by the high-voltage wire, breaking down the air between the two electrodes of the spark plug to generate an electric spark that ignites the air-fuel mixture in the cylinder. The main types include: standard spark plugs, projected insulator spark plugs, electrode spark plugs, seat spark plugs, pole spark plugs, and surface-gap spark plugs.