How often should I change spark plugs? This seemingly straightforward query opens the door to a multitude of considerations. Is there a universal guideline, or does the answer vary depending on the vehicle type and engine design? What about driving habits—do factors like frequent short trips or high-performance driving necessitate a more frequent replacement? Furthermore, the materials used in spark plugs can influence their longevity; would platinum or iridium spark plugs outlast their copper counterparts? And what signs should I be vigilant for that might indicate a decline in performance, such as decreased fuel efficiency or engine misfires? Moreover, how can one ascertain that they’re purchasing the correct type of spark plug? Should I consult a mechanic, or is there credible literature available that could guide me? Exploring these questions can lead to a deeper understanding of automotive maintenance, ultimately ensuring optimal performance and longevity for my vehicle.