How often should I replace my spark plug wires? Is there a specific timeline or mileage that I should adhere to in order to maintain optimal engine performance? Considering the various driving conditions and environmental factors that could accelerate wear and tear on these crucial components, what indicators should alert me to the need for a replacement? Could signs such as engine misfires, poor acceleration, or diminished fuel efficiency serve as harbingers of failing spark plug wires? Moreover, is it prudent to consult manufacturer guidelines, or can personal experience provide a reliable benchmark? Are there specific materials or designs that offer enhanced longevity, thereby extending the intervals between replacements? What impact does the quality of the spark plug wires have on ignition timing and overall engine health? In addition, should one consider whether their driving habits—frequent short trips versus long highway journeys—might influence the frequency of necessary replacements? Is there a difference in replacement frequency for newer vehicles compared to older models?