War's Mustang
From Super-wiki
War, one of the Four Horsemen of the Apocalypse, traditionally rides a red horse. In Supernatural, he drives a cherry red 1965 Mustang Fastback.
Ironically, Kripke originally was going to have the Winchesters drive a 1965 Mustang
"When I was originally writing the show I wanted to give the guys an American muscle car. My first choice was a '65 Mustang.
"He says, 'You want a car that, when people stop next to it at the lights, they lock their doors'.Source
"My neighbour said it has to be a '67 Impala, because you can put a body in the trunk.