I repair and perform maintenance on my own car and truck unless it’s something major. I’m also not a big fan of last mechanic where I took my car. I got him in trouble with his boss, which he really deserved.
He came out to the waiting room to inform me that he had already spent an hour and a half trying to figure out how to change the settings on my radio (not the reason why my car was in the shop) but he was having a hard time figuring it out. I tore him a new one right there. A couple of other customers got up and took their cars someplace else.
I didn’t get billed for those 90 minutes.