I love Phil's post about car movies -- I want to add a few of my own personal Favorites:

Grease (1978) - The dream custom Mercury that forms the backdrop of "Greased Lightning" is cool, sure, but look at the parking lots full of period-correct cars throughout the whole movie.

The Fast and the Furious (2001) - Okay, Vin Diesel is a joke now. But this movie has a car for every taste, from tuners to muscle cars and hotrods. There's even a gang of sportbike hoodlums.

Tin Men (1987) - Actually, I could have chosen any film directed by Barry Levinson. But Tin Men is all about the prestige of owning a Cadillac, and how much some guys are willing to do to show off their status.

More to come...