If the terminal is loose or somehow found a supply of water (car wash?) the electric arc will perform its own "science experiment" and raise hell with that poor piece of metal. you should dab some dielectric grease on them to seal out water.I wasn't trying to fix the spark plug, I was trying to asses the severity of the damage so I could figure out why it was oxidizing in the first place. I have new plugs and wires I bought today and will be putting them on shortly. I don't know why the plug did that, the boot appears fine and has no rips, tears, or holes. It might be a worn out end cap, I will cut it open and take a look.
Solid advice! Thanks. Just sent the wife to autozone for conductive grease. Didn't think of it until seeimg your reply.If the terminal is loose or somehow found a supply of water (car wash?) the electric arc will perform its own "science experiment" and raise hell with that poor piece of metal. you should dab some dielectric grease on them to seal out water.