Went in for initial oil change on a lease vehicle....

Went in for initial oil change on a lease vehicle. Appointment was at 11:15. I left the dealership at 2:15. 3 hours for an oil change is unacceptable. I was never told that with an initial service on a new or lease vehicle, the techs must do a full diagnostic prior to service. If this was COMMUNICATED to the owners it would have influenced my decision.