I don't have much occasion to call him by name. Only when he's irritated me. As in, "Christ, Beavers. Write that down somewhere. Prominently."

And then, yes, I do use his first name. That's how he introduced himself. I would never call him Mr. Beavers unless I got the same courtesy. (Ms. Automobile)

I'm not actually convinced he remembers my name. I can't think when he's ever used it except when calling, and then he uses my whole name.

" This is Beavers from the Damn Clinic. Have I reached Argon Automobile?"