Here's the story, sent in by a listener:
Dear Tom and Ray,
A few weeks ago, a caller asked about "Bar's Leaks." I decided to give it a try, and made my way to the automotive shop. When I walked in, my mind went blank (probably from listening to all of Car Talk), and I completely forgot the name of the product. When a salesman asked what I was looking for, I responded, "I'm looking for that head gasket stuff that looks like liquified rabbit turds."
His response was, "You listen to Car Talk, don't you?"