Next month, my 2020 Forester Limited will be five years old. The manual says spark plugs should be replaced at 60,000 miles or five years. I have approximately 18,000 miles on the car. I am older, drive less, and there were no long trips during the pandemic. I understand that fluids and some rubber components deteriorate with time; thus the mileage or time to change. However, when a car is not being driven, I would not think that time would affect the spark plugs. Am I missing something? Does anyone think I should spirng for spark plug replacement now? What does a standard plug replacement on a 2020 cost?
sabfish
If you do not follow the manufacturers recommendation you may void any warranty. If you do not occasionally change the spark plugs they may fuse to the engine and never come out. Changing them at 5 years is much cheaper then having them fuse to the engine.
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