Several years ago, I read an article that talked about the fogging oil. They recommended that you run the car, and spray the fogging oil into the engine (through the throttle body or Carburetor) until it stalls or you get a puff of smoke.
I just didnít find any body doing this lately. Do you change your sparkplugs after this??? Does the oil get deposited on the spark plugs???
They are only a few dollars, so itís a small price to pay for protection, come spring time.