I worked in a "10-minute oil change" and tune-up shop way back in 1980. I didn't get rich on $3.75/hr. Anyway, Saturdays were busy and the boss brought in his nephew to help on one of them. He fancied himself to be a hotshot 'mechanic'. We used to check each others' work afterwards, and on one car the oil level was just above the add mark. I questioned him about it and he said that as long as it was between the marks it was good. GRRR! I guess that was better than overfilling it, but I'm sure the customer expected the oil to be at the full mark right after a fresh oil change.
We would see a lot of cars come in with stripped drain plugs. We had universal rubber replacements we would use to stop the leak. GAH!
Our basic oil change package (bulk Esso 10W-30 dino, Fram fliter, and alleged 20-point inspection) was $14.88, a good deal even at that time. Quaker State 10W-30 dino was a $3 upcharge. Synthetic? What's that?
The 20-point inspection was a bit of a misnomer - four of the points were a "visual inspection of tire pressure". Even with the 78-series tires of the day, it was hard to judge how low a radial tire was. What else? Brake fluid level, ATF or MTF level, diff level, washer fluid. Perhaps we also checked turn signals and headlights. Hard to remember now. In any case, it was hard to get it done in the promised 10 minutes.
Every time I don't feel like crawling under the car, I think back to those days.