The sexist definition in the dictionary describes a sexist as a person who shares sexist beliefs and participates in sexist behaviors. Sexist beliefs are beliefs that revolve around sexism. The word sexist can describe the nature of a comment or gesture, as well.
So how long do they typically last? Well, standard copper plugs are said to last anywhere from 10,000 to 20,000 miles (16,093 to 32,187 kilometers), while more expensive iridium or platinum spark plugs can last 60,000 miles (96,561 kilometers) or more [source: Spark plugs UK].
Q: How long should stock spark plug last? (Denso Iridium Long Life: FK16HQR11) Question: How long do you keep the stock spark plug? I was planning to change it as a part of 60K mile service, but when I pulled a spark plug, it visually looked clean and did not show any visual hints of faulty spark plug (Google search spark plug diagnosis).