P.O.S. Car
In season seven, after Leviathan!Sam and Leviathan!Dean go on a killing spree (while driving a '67 Impala) causing the real Sam and Dean to become America's 2nd most wanted criminals, Frank Devereaux advises the boys to lock up the Impala to avoid detection.[1]
According to Jim Michaels: "We refer the weekly cars to as this weeks "P.O.S." Car -- Piece O Shit... LOL! They are very cool cars that we make look bad..."[2] Jeff Budnick is responsible for obtaining cars for the Show.
The season seven DVD and Blu-ray features an outtake from 7.06 Slash Fiction where Jensen sings along to Air Supply's "All Out of Love." Billed as guest starring in the video is the P.O.S. car — a Pontiac Acadian.
Episodes
7.06 Slash Fiction
The P.O.S. car of the week is the Pontiac Acadian.
7.07 The Mentalists and 7.08 Season Seven, Time for a Wedding!
The P.O.S. car of the week is the Dodge Challenger.
7.11 Adventures in Babysitting
The P.O.S. car of the week is the Buick Special Deluxe.
7.12 Time After Time
The P.O.S. car of the week is the Honda Civic Coupe.
7.13 The Slice Girls
The P.O.S. car of the week is the Buick Riviera.
7.14 Plucky Pennywhistle's Magical Menagerie
The P.O.S. car of the week is the Mercury Cougar.
7.15 Repo Man and 7.16 Out with the Old
The P.O.S. car of the week is the Pontiac Firebird.
7.17 The Born-Again Identity
The P.O.S. car of the week is the Dodge Charger.
7.18 Party On, Garth
The P.O.S. car of the week is the AMC Pacer.
7.22 There Will Be Blood and 7.23 Survival of the Fittest
The P.O.S. car of the week is the Plymouth Roadrunner.