I'm getting down to the final stages of detailing my engine bay and was wondering if someone could tell me if all '65 engines are supposed to have the round, red and white, "oil change" sticker on the oil cap? I see no trace of mine ever having one. All the restored cars I've seen have them while a few of the unrestored cars don't. Is this another case of everyone copying everyone else and putting the sticker on when perhaps it really shouldn't be there? (Jan '65 Dearborn 200 I6)