I cooked a pork shoulder in a 200 degree oven overnight in a covered pot. That big Dutch oven is good for projects like this. I added the usual seasonings and also a bottle of regular Coke. It turned out fairly well. After pouring off the excess liquids, I boosted the temp to 350 and returned the roast to the oven, uncovered, to get a little more color on the meat. The reserved liquids were skimmed of fat and reduced in a separate sauce pot before adding them back.