Originally Posted By: Electromotive
When installing spark plugs on a Ford F 150 equipped with the 300 inline six engine should I use a little anti-seize on the threads or not? The plugs for this engine don't have many threads on them, maybe six or seven full threads at most, unlike some other plugs. (NGK recommends not using anti-seize when installing plugs)
There are several threads a year on this topic, some people are for it some against it. I've always used it, including NGK plugs.
Regarding the 300 I6, I have owned vehicles powered with that engine since 1984, and still own one. I've used anti-seize on the plugs in every one of them until today. With Autolite and NGK plugs, never a problem. I live on Long Island where corrosion can be an issue.