How often do you have to replace spark plugs in a car?

The frequency of replacing spark plugs depends on your car’s make, model, engine type, and the type of spark plugs used. Here are general guidelines:

Standard Intervals

• Copper spark plugs: Every 20,000 to 30,000 miles.

• Platinum spark plugs: Every 60,000 miles.

• Iridium spark plugs (most modern cars): Every 80,000 to 120,000 miles.

Best Practice

• Check your owner’s manual for the manufacturer’s recommendation.

• If your engine starts misfiring, idling rough, or showing poor fuel economy, it might be time to check or replace the plugs sooner.

Pro Tip

Even if you’re not at the mileage limit, it's good to inspect spark plugs during major tune-ups or every 30,000 miles to catch early wear or buildup.

If you let us know your car’s year, make, and model, we can give you a more precise recommendation.

go to https://www.youtube.com/watch?v=15y8ABr-U18 for a video version