The car has always run just fine. 3 years on plugs is nothing. Imho. Besides being covered in oil, they are fine.
EDIT: Typical spark plug life is between 45k miles and 100k miles. Depending on what it is made from. (copper, platinum)
EDIT: Typical spark plug life is between 45k miles and 100k miles. Depending on what it is made from. (copper, platinum)
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