AUTO ZONE

Q: How many college freshmen does it take to change the mass position sensor of a fuel delivery system?

A: What's a mass position sensor?

We have no idea, but we're betting the people at Auto Zone do. Besides having just about any part that you can think of, Auto Zone offers a lot of neat services to its customers, like parts testing, used-fluid recycling, battery testing and tool loaning.

Runners-up: Advance Auto and Pep Boys