Oh yeah, I remember those, the cardboard cans. I worked at a Mobil station from '73 to '81 and that's what we had. The gold can of 10W-40 Super was the most popular. At that time 10W-40 was considered the "best" motor oil you could get. The blue and silver Regular was what the cheap folks would buy. We had SAE30, and 20W-20, although I could never figure that one out. There was also a 10W-30 Special. It came in a gold and white can if I remember correctly. It was priced between the Super and the Regular, but it was probably a better oil by today's standards (less additives to stretch the viscosity).
There was a little bit of skill to inserting the spout. You had to do it with authority, too slow and the can could collapse. You'd keep an eye out for ripples or dents in the cardboard can wall. You'd avoid piercing the can over that weak spot. "Schloop" that was the sound they made when pierced.
I think the cardboard cans were more '70s and the plastic cans were more '80s. I don't remember the plastic cans being used while I worked there.