Mr. Pop History -
Early in her career – Ms. Monroe did a TV commercial for (Unocal) United Oil of California. In it, she tells a service station attendant – that she wants her new car, to be the best cared for car – ever.
Service station attendant – those guys who filled-it-up, wiped the windows and performed other minor, quick services.
Marilyn Monroe – then, a minor player – would soon become a star. No more commercial endorsements. I believe this was the only one she did. And, it was only seen in places such as Los Angeles.