I went in for a routine oil change and was told by a service tech that my brake pads were very low and needed to be replaced. The tech never removed any of my wheels but simply made this concluson by shining a flashlight into the wheels.
I declined the offer to have new brake pads immediately put on but went home and didn't want to drive the car any distance until I had another mechanic check out my brakes. The 2nd mechanic said my brakes were fine and it was just a sleezy rip off telling me that my brakes had to be replaced.