Holy oil has other uses than just trapping angels. The boys learn of that when they find Gabriel getting kicked around in a warehouse. (Oneshot, Sabriel. No specific season, but assume that Gabriel rose again.)
"It isn't that this is more than I can handle. It's that he tried to shatter you into as many pieces as Asmodeus did to me. I'm trying to imagine anybody doing that to you. I know my brother is capable of anything; I wish I didn't know, but I do. And even him ... I get that the universe doesn't play fair but trying to wrap my head around anyone wanting to destroy you like that ... it isn't coming easy."
"I'll lie down on the floor right now and let you do whatever you want to me. I'll freakin' HAND you that archangel blade. I'll brew whatever poison you want, however many times you want. But I'm done with having you treat me like I'm worth anything to you. Like I'm worth anything at all."
"Grace. I'm good for my grace. So long as I'm here, just waking up to throw a fit, I don't matter, okay? And when I was with him, I was nothing. But I mattered. Because I could supply something that mattered. And now I can't even do that."
"It isn't that this is more than I can handle. It's that he tried to shatter you into as many pieces as Asmodeus did to me. I'm trying to imagine anybody doing that to you. I know my brother is capable of anything; I wish I didn't know, but I do. And even him ... I get that the universe doesn't play fair but trying to wrap my head around anyone wanting to destroy you like that ... it isn't coming easy."
"He was right! He was right to do what he did! I know that now; I - I was only good for my grace and when I couldn't give it - I was nothing. I'm still nothing. I can't give you anything. I tried and I can't. I'm nothing."
You're a wannabe hunter who grew up under Bobby Singer's roof after he and Rufus saved you from a monster that killed your parents. Sick of working the Phone Wall, you convince Bobby to let you try hunting. He sets you up with the Winchesters and thus begins your greatest adventure.
"It's a gross feeling, I know. The whole nightmare game. Truth is I'd rather face down an entire army of Michaels than go through that every night like I used to. Listen - I'm not Sam, but I know how to do this."