Replacing spark plugs is a fundamental maintenance task that ensures optimal engine performance. Over time, spark plugs wear out, leading to misfires, reduced fuel efficiency, or difficulty starting the engine. Most manufacturers recommend replacement every 30,000 to 100,000 miles, depending on the type. New spark plugs restore proper ignition, improving combustion and engine responsiveness. The process involves removing the old plugs, inspecting the cylinder threads, and installing new ones with the correct torque. Using the right plug type for your vehicle is essential to avoid damage. This simple procedure can significantly enhance acceleration, smoothness, and fuel economy. It’s a cost-effective way to keep your engine running cleanly and efficiently, extending its lifespan with minimal effort.