Sort of a silly story, but I thought it was funny at the time...
I was down on the peninsula for a meeting. After the meeting, I stopped for lunch at a local favorite of mine before I drove home, and remembered that I wanted to add some oil to the car. Look in the trunk. No oil.
So I drive over to Allison BMW and walk up to the parts counter:
Me: "Hi, I need to buy a quart of oil for my car"
Counter Guy: "Sure, what brand"
Me: "BMW Synthetic"
Counter Guy: "No, what brand of car?"
Me: "Uh... BMW"
Countery Guy: "Which model BMW?"
Me: "it's an M5"
Counter Guy: "O.K...530"
Me: "No, it's an M5"
Counter Guy: "Huh?"
Me: "The car...it's an M5, not a 530"
Counter Guy: "Yeah, so 1060?"
Me: "NO, it's an...Oh, you mean the oil weight...yes 530"
We both started laughing...
Maybe you had to be there...