In 1970 there were still occasions when there long gaps between customers at Ross Services petrol station and the attendants could be often seen at the door of their office looking somewhat bored:
One could do the crossword of course (whilst keeping a lookout for the boss!):
Or one could practise acting the part of clown!
The oil cupboard was an important part of the role of a petrol attendant as quite a few cars used nearly as much oil as petrol (lol) as evidenced by the clouds of oily smoke which followed them. It was possible to earn a lot of commission selling oil and some unscrupulous employees were sometimes known to be a little generous when checking an engine's oil level!