I was a car and motorcycle (dirt bike) nut growing up - primarily into mid/late 60's - early 70's GM muscle cars
worked at a service station and a couple of body shops during high school and college years - but did not stay with it
some of my friends did though
I worked at a shyster used car lot and some gas stations and eventually was partners in a garage with another alcoholic. He went to a new car dealer after we closed and I didn't end up at a new car dealer until 1989.