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

tires auto repair car maintenance vehicle energy saver preventative flush service engine maintenance auto repair services auto services preventative maintenance service winter tires snow tires snow and winter tires difference snow tires winter tires snow tires vs winter tires safe winter driving winter tire information new tires summer tires all season tires buy tires all seasons tires replacing tires brakes brake check, brake lines brake service brake repair automotive repair services truck tires car tires truck tire repair car tire repair tire repair transmission flush brake flush power steering flush auto flush auto repair service auto service preventative maintenance tune up service oil changes gas mileage oil change Mother's Day air conditioning service auto repair mechanics battery inspections tire rotation safe driving tips car battery check engine light car repair ac repair service recharge ac ac service air conditioning car service wheel alignment tire replacement driver safety back to school fuel economy tire maintenance rotate tires tire rotation service tire rotation benefits tread wear safe tires tire pressure tire inflation driving tips vehicle lights headlights brake lights holiday travel tire alignment tune up tire balancing car alignment break service Car Energy Savers ac repair oil change service spare tires automotive repair truck repair winter driving winter winter tire tips spare tire car spare tire truck spare tire winter tire decisions winter tire help winter tire guide heating repair mpg mileage buy snow tires buy winter tires winter tire benefits winter driving tips safe vehicle mechanic mechanics auto mechanics auto mechanic tire technology high mileage engine tire recycling high mileage car flat tires flat tire repair coolant fluids tire store tips tripletred tires passenger tires tire center auto facts car care kit tire facts spark plug replacement spark plug repair spark plugs