At 13500 I replaced my spark plugs as preventative maintenance as well as ton keep the plugs from seizing. Is there any harm in not using Motocraft plugs. I realize the engine may run best on OEM plugs, but is there any harm in using the NKG Iridium IX plugs that I just installed. My justification in not using stock plugs is the longevity of the iridium. I have no preference of the brand, I just know NKG is a good brand for plugs. The new installed plugs are the correct heat range and have been gapped to the car's specifications. Thanks!
Jul 23, 2010 at 10:47 PM
