Posted on 7/28/2025
Spark plugs might be small, but they play a vital role in your engine’s performance. They create the spark that ignites the air-fuel mixture inside each cylinder, powering your vehicle. Over time, spark plugs wear out and can cause a range of problems if not replaced on schedule. Understanding how often to replace them and the signs of wear can help keep your engine running efficiently and avoid unexpected breakdowns. The Typical Lifespan of Spark Plugs Most modern vehicles use long-life spark plugs made from materials like platinum or iridium, which can last anywhere from 60,000 to 100,000 miles. Older vehicles or those using standard copper spark plugs may require replacement every 30,000 miles. However, driving conditions, engine type, and how you maintain your vehicle all influence how long your spark plugs actually last. Why Regular Replacement Is Important Worn spark plugs can’t provide a strong, consistent spark, which affects t ... read more