Spark Plugs – How Often Should They Be Replaced?

April 27th, 2017

In the old days, a tune-up was necessary about every 35,000 miles. It would usually consist of setting the ignition timing, replacing the mechanical breaker points in the ignition, cleaning and adjusting the carburetor and replacing the plug wires and spark plugs. Today, of course, the carburetor’s job is done by fuel injection and the ignition timing and spark are controlled by the engine computer. Few vehicles still have plug wires anymore either, as the distributor was replaced by the computer and a coil-on-plug design which delivers a spark at each spark plug.

But what about the spark plugs themselves, though? How often do they need to be replaced now?

Manufacturers tout an 80k-100k mile service interval on spark plugs now, thanks in part to improvements in plug design and materials. That might be stretching it, however. Remember that if you have a 100,000-mile spark plug, its electrode is worn down 4/5 of the way at 80,000 miles. A worn ...[more]

  Posted in: Auto Repair 101

  Tags

tire tread depth tread wear tips tire technology tires transmission fluid brake fluid auto service auto repair car20conditioning AC Service replacing tires flat tires driving safety tire, preventative maintenance high20engine high20car oil changes oil change tire technology tire recycling Fuel Economy gas mileage mpg tire repair tire inflation tire pressure drivers safety car repair mechanic tire inflation tire rotation wheel alignment winter20service winter20repair snow tires winter tires all20tires holiday travel brakes car battery tire inflation tire20service car tires new tires air conditioning repair20ac air20service ac service car20conditioning service car20service tire inflation tire balancing tire alignment safe20tips tire maintenance safety20driving driver tips tire inflation oil20service alignment tune up preventative maintenance driver20tips preventative maintenance preventative maintenance holiday travel preventative maintenance tire maintenance, brake lights headlights preventative maintenance Halloween preventative maintenance brake service tire inflation brake repair flat tire auto20service auto20services tire20benefits preventative maintenance back20school replacement tires automobile20service car20conditioning service, tune20service battery replacement Mother's Day oil20replacement car20up flat20repair tires20winter buy tires winter20and information winter20tips buy20tires winter driving check20light cheap20tires discount20tires winter20benefits winterize20battery winter20tips tire sale buy20online tires online winter20tips auto mechanics auto mechanic high20cars car20replacement summer tires wheel balancing tire balancing, car alignment, a mileage Windshield Repair windshield20repair glass20repair auto20repair windshield crack windshield winter auto repair winter car service preventative maintenance tire pressure auto facts tread wear replacing tires tire facts auto repair check engine light auto service spark plug truck tires car alignment