Should I replace my spark plugs
I have a 2003 Toyota Corolla with 150,000 miles on it that I recently purchased —I just changed the PCV valve and the hose line to it because it was extremely full of gunk and oil and very sludgy And I didn’t oil change. I removed the number one spark plug and found a slight amount of sludge at the Ring portion of the spark plug around the electrode. The car does run perfectly fine but I just wanted to see if that is an issue I should look into or just change the spark plugs and wait a while to see if it continues?
The electrodes are in good shape, but they're buried in crud. Needs an italian tune up.
Do you drive the car very little, or short trips? Does it burn oil?