When you know you are not dealing with a mopar person

Part of an actual conversation I had at a gas station this year:

Him: What gear do have in that thing?
Me: Just a 3.23. Nothing too crazy.
Him: Is it posi?
Me: No, it's Sure Grip.
Him: Too bad, you should get a posi unit. It will take off much better.
Me: :BangHead: