I call this an "oil change scam". By now you've probably read some of the reasons why I don't recommend taking your car to any of these "quick lube" type places. You take your car in to get an oil changed an by the time it's done they have tried to sell you lots of things that you probably don't even need.
The employees at many of these places are paid on comission. The more parts they sell, the more money they make. Many other of these places pressure their employees into selling parts, whether they are needed or not. The best demonstration of this are the videos below. I highly recommend you watch them before taking your car to a quick oil change type place.