What's Your Automotive Shibboleth?

Most minor league car enthusiasts know the difference between a Countach and a Diablo, so to ascertain if someone is truly auto-literate you gotta throw something tricky at them. A shibboleth. What's your automotive shibboleth?

This question popped up the other day while hanging out with some other autojournos and car enthusiasts. While waxing gearhead about the Audi R8, Mustang-v-Camaro and other usual car enthusiast topics of discussion someone mentioned the Chevy Citation X-11. A few of us immediately jumped into a conversation about the dinky front-tracking compact. It's a total D-list car, but it takes a certain love of automobiles to be so keenly aware and excited about the mention of one. And to credit the X-11, it did pick up two SCCA championships in its class, though those cars have likely turned into a rusty mess.

What car do people need to know in order to pass into your good graces?

(QOTD is your chance to answer the day's most pressing automotive questions and experience the opinions of the insightful insiders, practicing pundits and gleeful gearheads that make up the Jalopnik commentariat. If you've got a suggestion for a good "Question Of the Day" send an email to tips at jalopnik dot com.)