Out of the dozen or so Duratecs that I've bought with blown engines about half of them actually busted a hole in the block. I only recall one of them going through the oil pan. Most of the rest had severe damage due to blown head gaskets. On the flip side though, I have bought a few parts cars with Duratecs that had over 200K miles. Seems to be a good engine if you take care of it and don't beat the heck out of it.
