Gas-N-Sip

Gas-N-Sip is a fictional gas station and convenience store (food mart & more) with locations across the United States, which Sam and Dean frequent on their road trips.

Castiel was once a former employee at a Rexford, Idaho Gas-N-Sip under the alias "Steve."

Episodes

7.03 The Girl Next Door

After Sam uses a credit card at a Whitefish, Montana location to buy snacks, the name on his card -- "Lemmy Kilmister" -- is flagged by the Leviathan Chet. Upon arriving at the Gas-N-Sip, Chet checks the security footage and calls Edgar to confirm that it was Sam that used the credit card. Before leaving to continue his pursuit of Sam, Chet douses the restrained clerk with molten cheese before eating him.

7.22 There Will Be Blood

At a Hoople, North Dakota Gas-N-Sip Sam and Dean stock up on natural and healthy food, due to any food with corn syrup being laced with the Leviathan food additive. When Dean holds up a container of pie that says "Natural", Sam puts the pie back on the shelf telling Dean corn syrup is technically natural.

8.08 Hunteri Heroici

Sam and Dean are filling up the Impala at a Gas ’N Sip, when Castiel reveals his intention to become a hunter. When Sam, catches a case in Oklahoma City, the trio pile into the Impala and drive off.

Sales Associate Steve

9.06 Heaven Can't Wait

Some time after Dean telling him he cannot stay at the Men of Letters Bunker, the newly human Castiel takes a position as a sales associate at a Rexford, Idaho Gas-N-Sip under the name "Steve." As Steve, Castiel was a model employee and admired by his manger, Nora.

When Castiel believes to have found a case with four missing people, all with a strange substance found at the scene, he informs Dean. When Dean arrives in Rexford, he finds Castiel working at the Gas-N-Sip, he tries to tell Castiel he is above working at a Gas-N-Sip, but Cas explains to him how he failed as an angel and when he lost his grace he was left with nothing, but as Steve he thinks he can do things right and sees a real human dignity to what he does, just as Nora informs him that a customer had an accident in the men's room.

9.09 Holy Terror

Castiel tells Sam and Dean he quit the Gas-N-Sip due to his wanting to help stop the angels from slaughtering one another.

9.18 Meta Fiction

Castiel and Gabriel pull into a Gas-N-Sip just as minions of Metatron arrive. Gabriel tells Castiel to escape while he holds them back, telling him the angels need Cas to be their leader. As Castiel is about to leave, he notices his coat is no longer torn, and learns from Gabriel that everything was an illusion created by Metatron before he disappears.