I hear you on these issues. I agree the oil change lane is the worst. I have had work done by a local mechanic and after some time did not trust him, so I went to the dealership and started having my maintenance items done there. I asked my service guy "who do you trust with your car in this dealership". He told me the Techs name, and that is who I ask for all the time. This tech really is a gem, totally ASE certified mechanic and will even tell me if something is not needed. He does do my oil changes, tire rotations as well as the big things,...he did my timing belt change. I used to hate taking it there and having the young guys change my oil. I could watch them through the window, and one of them dinged my car with the nozzle for the oil fill. Of course he looked right at me, I smiled and he got the manager over, and they fixed it. My point is, if you ever decide to go back to a dealership, ask the service guy who writes up the maintenance who he uses, it worked out well for me. As far as the kind of oil they use,...I can only hope they are telling me the truth.I once got my oil changed at the Honda dealer for my son's 2012 Honda Accord EX-L.
It was speced for 0W-20, but after I talked with the service tech, he said they are using 5W-20 conventional oil from a drum
from Gulf oil company for all oil changes because it's the cheapest oil they can find (to increase the dealership profits on the usually low profit oil changes). He said 5W-20 and 0W-20 are interchangeable so it doesn't mater.
They also didn't let an ASE Mechanic do the oil change. They routed it to their Express service,
which is a 2 bay small building attached to the left side of the dealership just for fluid changes.
They had a young guy doing the oil changes, looked about 19 years old, and he had trouble understanding English.
After the oil change was over, I checked the fluid level, it was 1 quart low. I am unsure if that was an intentional cost cutting move to save dealership oil costs, or if it was accidental.
I took my vehicle to a Honda dealer expecting the best oil change you can get, and I got the worst oil change (worse than most quick lube places). I won't ever get an oil change at a dealer ever again. I've lost trust in dealerships. Their main reason to exist is to be an infinite cash cow for the dealership owner, by price gauging / cutting corners on every aspect of the dealership's operations.