Now you've gone and done it..... some years ago, I was passing by a Monroe Muffler shop it dawned on me my oil was overdue on the 2-year-old Jeep I was driving, and since their lot was almost empty I "thought" I could get in and out quick. Well, I got in immediately; but, 45 minutes later my Jeep is still up on the lift and all the other bays were empty. So, I get the managers attention and inquiry why the hold up? He tells me that the oil pan plug was rusted in place and ruined the threads when the tech removed it. Well, I was born in the morning, but not that morning. So, not even bothering to worry about their employee's only sign, I walk into the bay and look for myself. Just as I'm standing there the tech shows up and has a Helicoil in hand. Then I look up on the lift-arm and there sits the drain plug, I pick it up and while the plug threads are fine, I can see the metal shavings off the threads of the oil pan, obviously after it cross threaded and forced into the hole. In short, I told the manager to call the Jeep dealership, a block away, and have them send over a new oil pan. When it was done, I just grabbed the keys and told the manager to eat the bill. Or I'd just drive right across the street to the courthouse, as luck would have it, and file a small-claims suit against them..... case closed, and never used a quick-change shop again!