After losing his mojo and traveling via car with the Winchesters for months on end, Cas decided he needed a car of his own. He saw how much Dean adored his 'baby' and wanted something to dote upon and lavish as well. Dean often encouraged him to explore new avenues of human behavior and it seemed anomalous for a human not to own a car. Thus, Castiel was convinced he needed one too.

Days of searching ensued, but he couldn't find the right car. The Impala and Dean seemed to go together better than 'peanut butter and jelly' as Sam said. Cas wanted his car to fit him as well. The search was consequently slow, but he was determined. A few weeks after he began scouring the earth, Cas found the perfect car. It was beautiful, all graceful lines with an undercurrent of masculine tendencies. And, most importantly, it screamed 'Castiel'. The moment the angel saw it, he was smitten.

There was, however, one small snag. It didn't run. The man he bought it from had rambled something about it needing extensive transmission work and mentioned something called a radiator. Cas paid the man no mind. He knew exactly how to fix it.

A few weeks later, Cas unveiled his 'baby' to the Winchesters. Sam dissolved into a fit of laughter upon seeing the angel exit the car. Dean stood with his mouth agape.

"Cas? You bought a car?" he asked.

"Yes, Dean. I wanted something to lavish affection upon as you do with the Impala. It is a human custom to own a car, is it not?"

"Well… yeah," Dean shot Sam a glare as he continued to laugh. "But why'd you buy that?"

"You do not approve?"

"No, I just never would have pegged you as an Alfa Romeo guy. A… white Alfa." The hunter stared at the 1970 Alfa Romeo Giulia for a moment before remembering how to work his legs. "What kind of engine does it have?"

Cas smiled. This was the moment he had been waiting for. "The man I purchased it from said it needed extensive work, but I soon solved all the problems."

"Really? I wouldn't have guessed you knew anything about cars, Cas."

The angel moved to open the hood and display his handiwork. Before Dean could so much as get a glimpse under the hood, a furry ball shot out of the engine compartment and latched onto his face. All fur and claws, Dean recognized the fury of Mr. Fluffykins—the damn feline had always hated him. He swore and scrambled to remove the spitting cat off of him. He lobbed it in an unknown direction and spun on Cas to skewer him with a murderous glare.

"What the fuck was that?"

The angel looked hurt, staring after the car longingly. He had the gall to look apologetic. "I'm sorry Mr. Fluffykins doesn't like you, Dean. But he was my solution to the engine difficulties."

"How the hell did you fix a car with a cat?"

"You always say the Impala purrs. Now my car does too!"

Sam continued laughing in the background as Dean stalked away to clean his wounds.