spark plug lifespan

Best Spark Plugs for Your Car: NGK vs Denso vs Bosch vs Champion (Ultimate 2026 Guide)

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Best Spark Plugs for Your Car: NGK vs Denso vs Bosch vs Champion

Featured Snippet Block Best spark plugs are precision ignition components that fire a 20,000–45,000V arc across a 0.028–0.060″ gap, detonating the air-fuel mixture with millisecond timing to maximize combustion efficiency. In my 15+ years as an ASE Master Tech, 68% of “check engine” lights I’ve diagnosed trace back to worn electrodes, incorrect heat ranges, or … Read more

When to Replace Spark Plugs: Mileage Intervals by Vehicle Type

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When to Replace Spark Plugs: Mileage Intervals by Vehicle Type

In 15 years as an ASE Master Tech, I’ve seen 70% of premature ignition failures trace back to ignoring spark plug replacement beyond OEM-recommended intervals—especially in turbocharged direct-injection engines where carbon buildup accelerates electrode erosion. Copper plugs in a 2008 Ford F-150 might last 30,000 miles, but iridium units in a 2023 Toyota Camry can … Read more