Plymouth Roadrunner
From Super-wiki
Dean drives a Plymouth Roadrunner in 7.22 There Will Be Blood.
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] Dean drives a series of other cars; this one is the last one he drives before retrieving the Impala in 7.23 Survival of the Fittest