Not car related but still pretty funny:
My girlfriend Amy and I were leaving for the coast one Friday after work and I reach in my truck console and pull out of bottle of Guarana(
http://en.wikipedia.org/wiki/Guarana).
She said, "What’s that for?"
My response, "It’s for energy, I’m tired from working all day you can take one if you want."
Amy," I’m not taking bat poop for energy!!!!!!" With a disgusted look on her face
I just started laughing my ass off.