It happens more times than it should— negligent oil changes. This happens most often with aluminum oil pans on cars and trucks, because aluminum is fragile and should be treated with care and a gentle hand, not a torque power wrench. Using an air-impact gun will only cause damage when installing the bolts, causing the oil to leak from the pan.
Plus, no good can come from those drain bolt repair kits, so if you're looking for the proper fix for a stripped out aluminum oil pan, you'd better follow these directions on your vehicle. Hopefully it saves you headaches in the future, as well as a bunch of money!