How Often Should Spark Plugs Be Changed? Mileage Guide
Spark plugs should usually be changed every 30,000-100,000 miles, but the correct interval depends on the vehicle manufacturer’s service schedule, plug material, engine design, and driving conditions. Many copper plugs last 20,000-40,000 miles, while original-equipment platinum or iridium plugs commonly last 60,000-120,000 miles. The owner’s manual is the final authority. Key Facts at a Glance […]