Can Spark Plugs Still Be Used After 5 Years?

[GeorgeRose]

Spark plugs can still be used after 5 years. Generally, spark plugs can be stored for a long time if they remain unopened and unused. The shelf life of spark plugs during use varies depending on the type of spark plug and usage conditions. Main types of spark plugs include: standard spark plugs, extended insulator spark plugs, electrode spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-gap spark plugs. Spark plug replacement intervals: Under normal maintenance conditions, spark plugs should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type. It is recommended to follow the user manual. The following standards can be used as a reference for maintenance and replacement: Platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers.