Probably because the next person probably thought he bought new plugs
Originally Posted by The_Nuke
Why did the person use the silver-painted plugs in his engine instead of returning them for actual new plugs?
Originally Posted by Dave_Mark
I know a person who purchased spark plugs from an AutoZone. The spark plugs were returned by a previous customer but were "new." The previous customer actually painted some old spark plugs from a different vehicle silver and stuck them in the box. This person who purchased the "new" spark plugs ended up destroying their engine. The plugs were too long.