How Often to Change Spark Plugs

If you’re like lots of other car owners in Matthews and Waxhaw, maybe you’ve wondered how often to change spark plugs but still aren’t quite sure of the answer. Typically, experts recommend changing the spark plugs every 30,000 miles. However, spark plug replacement intervals can vary between makes and models. The best place to go for a model-specific answer is your owner’s manual, but in the meantime, you can join our service team down below to learn more about spark plugs!

When Do I Change Spark Plugs? How to Tell if Replacement is Needed

Your car’s spark plugs are merely one component of the larger ignition system. They transfer the high voltage current from the ignition coil to ignite the combustion chamber when you start your vehicle. Since they’re needed to successfully start your car, you’ll probably agree with us that the spark plugs are pretty important!

If your answer to “when do I change spark plugs?” is “as soon as possible”, here are some of the warning signs you might notice:

  • Sluggish start or not starting at all
  • Poor engine performance
  • Engine misfires
  • Inhibited acceleration
  • Elevated fuel consumption
  • Rough idling

What Are the Benefits of Replacing Spark Plugs?

Thankfully, how often we need to change spark plugs is relatively infrequent compared to other routine maintenance. When you’ve put enough miles on your vehicle that it needs new spark plugs, there are several benefits to replacing them:

  • Better MPG – What many Weddington drivers don’t realize is that worn out spark plugs can lower their fuel economy by a whopping 30%! Replace the spark plugs when needed, and you’ll never have to fret about fueling up too often.
  • Dependable combustion system – You need your car’s ignition system to run smoothly, and functioning spark plugs are a necessary part of achieving that.
  • Reliable starts – New spark plugs lend themselves to a smoothly operating ignition system, which in turn gives you a reliable start every time you turn the key or push the button.
  • Improved emissions – In addition to improving your fuel economy, new spark plugs can also keep your vehicle’s emissions as clean as possible.

Replace Your Spark Plugs at Hendrick Chevrolet Monroe

If you’ve racked up around 30,000 miles on your vehicle and you think it might be time to replace the spark plugs, schedule a service appointment at Hendrick Chevrolet Monroe! Our technicians will let you know whether it’s time for replacement and point you to service specials that can help you save on maintenance.

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$899.00 Dealer Administrative Fee included in advertised price.

All prices exclude all taxes, tag, title, registration fees and government fees. Out of state buyers are responsible for all taxes and government fees and title/registration fees in the state where the vehicle will be registered. All prices include all manufacturer to dealer incentives, which the dealer retains unless otherwise specifically provided. Dealer not responsible for errors and omissions; all offers subject to change without notice; please confirm listings with dealer.

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Well-qualified customers who purchase a new, used, or certified pre-owned vehicle, 4 model years or newer with less than 60K miles between September 1, 2026 and November 2, 2026, and finance through a participating dealer and lender have the option to defer monthly payments for 120 days from contract date. Excludes Hendrick Performance vehicles. Finance charges begin to accrue on the date you sign the Retail Installment Sale Contract at the Annual Percentage Rate (APR) disclosed in the contract. May not be combined with other preferred lender financing offers. 75 months maximum term limit. Equal monthly payments only. Not available to Pennsylvania residents; see your dealer for details. Must take retail delivery by November 2, 2026. See dealer for complete down payment and interest rate options and details. Financing available to qualified buyers. Some exclusions apply. See dealer for complete details. 

*Offer includes all dealer discounts and OEM incentives. Offer does not include tax, tag, title, fees, and other dealer installed options. Discount varies by model and stock number. Example stock #T79379. See dealer for details. Take retail delivery by 9/30/26. **Finance charges accrue from date of financing. Deferred monthly payments for 90 days. 0% APR for 60 months. Monthly payment is $16.67 for every $1,000 you finance. Example down payment: 6.7%. Must finance with GM Financial. Down payment required at signing, if applicable. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 9/30/26.

*Offer includes all dealer discounts and OEM incentives. Offer does not include tax, tag, title, fees, and other dealer installed options. Discount varies by model and stock number. Example stock #T79379. See dealer for details. Take retail delivery by 9/30/26. **Finance charges accrue from date of financing. Deferred monthly payments for 90 days. 0% APR for 60 months. Monthly payment is $16.67 for every $1,000 you finance. Example down payment: 6.7%. Must finance with GM Financial. Down payment required at signing, if applicable. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 9/30/26.

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Hendrick Chevrolet Monroe 35.0239, -80.583.