Well, I haven't had alot of confidence in my oil pan's drain bolt ever since I bought the car & did the first oil change. Well, about a year later, the threads gave out at last. So, I bought a "self tapping" single oversize bolt & put it in. Upon installation, the cheesy plastic washer it came w/ broke into about 4 pieces, so I bought a stainless washer from the hardware store, and it still has a drip going on. Not bad, but after about an hour of sitting cold, it will have formed a single drip ready to fall from the pan. Why isn't it sealing all the way? the oversized bolt actually snugs up to the pan tighter than I thought i'd be able to. The only thing I can think of is to drain my 4 1/2 quarts of brand new oil back into the containers, clean out the threads really well, and JB weld one of those "piggyback" oversized bolts in (you leave the larger bolt in once it's in there, and you change your oil via a smaller bolt that screws into the top of it. anyone else have any other suggestions on how to seal that drip up w/o dropping the pan??