I don't understand this place. There are times whe...

I don't understand this place. There are times when you need an appointment for an oil change and there are times when you don't need one. Of course, when I just "walk-in" they can't take me because they have a high volume of cars needing to be done and not enough technicians and they want me to make an appointment. I make an appointment and still have to wait 2 hours for my car to be done! Not cool!!