I brought our old Lexus to a Valvoline Oil change shop because I didn't have the time to do it myself that day. I even brought the oil and filter with me, just wanted them to do the labor, which wasn't cheap. They had this whole professional looking procedure and process to make you think they are doing a good job, sure seemed like it while sitting there watching them do it.

However, what I didn't see was the moron at the bottom of the car draining and installing the drain plug. They installed a new drain plug, apparently a cheap one with a fault in the threads. In order to install this drain plug, they had to use a lot of torque to tighten it on, and the idiot installing it apparently said "screw it" as his torqued this garbage drain plug into the drain pan.

I found this out when doing my own oil change on the car months later. I needed to use a socket wrench to fully remove this drain plug, I should have been able to remove it with my fingers. I bought a new drain plug at my local shop and was able to message the threads back in to fix the drain pan threads and still get a good seal. But after this experience, I will never use a quick change place again.

These guys charged me for a faulty drain plug, installed it knowing it wasn't right and potentially could have costs me $$$ in repairs for a new drain pan. But I learned a valuable lesson.