Every car repair shop has that old, grizzled mechanic who’s willing to be strapped to the hood of a moving car in order to listen for noise or to hold two wires together with his bare hands in order to check for high voltage current. At Car Talk, that mechanic was Krusty. Krusty could not only tell you -with a taste off his fingertip- whether that oil stain was 30 or 40-weight, but he could do it while wafting tailpipe smoke into his mouth as a way of double-checking the shop's exhaust gas analyzer. The legend that was Krusty was a feature of the puzzler for decades and here is one of his early mentions.