I have a 2001 Buick Century with about 40,000 miles on it now. I was
wondering When I should change the spark plugs on my car? I have always
done tune-ups on my cars (new cap, rotor, plugs and wires if needed) at
about 40,000 miles. My previous cars were Ford Taurus, and Dodge Spirit.
Also, I have always replaced the PCV Valve every 40,000 miles, and I have
not done that as of yet. When should I change the PCV valve?
Lastly, the fuel filter has not been touched yet. When should that be