Are your spark plugs overdue for replacement? Watch for signs like poor performance, engine knocking, and decreased fuel ...

Spark plugs are one of those maintenance items that, along with things like brake fluid and thermostats, are easily ...

We may receive a commission on purchases made from links. Spark plugs have come a long way, as they're more durable and reliable than ever before. In fact, unlike most air filters and fluids that do ...