[Ideal Replacement Interval]: For optimal engine performance and longevity, it is recommended to replace nickel alloy spark plugs at mileage intervals of 20, 000 to 30, 036 miles
[Engineered for Longevity]: For optimal engine performance and longevity, it is recommended to replace platinum iridium spark plugs at mileage intervals of 80,000 to 100,000 miles