1.   A concept car, as any car nut can tell you, is a prototype designed to shake up dusty, entrenched notions of car design.

2.   A high school senior in Modesto, Calif., he was an underachieving car nut who miraculously survived a two-car crash that totaled his Fiat Bianchina.

3.   Car nuts love Florence.

4.   If you have read this far, you are a car nut.

5.   Joseph M. Tucci calls himself a car nut.

6.   My brother Rick was the car nut.