In a slow cooker, place the pork loin. Add olive oil, brown sugar, mustard, soy sauce, bay leaves, black beer, salt, and pepper.
2 pounds pork loin, 2 tablespoons olive oil, ¼ cup brown sugar, ¼ cup mustard, ¼ cup soy sauce, 2 bay leaves, 1 can black beer, 1 teaspoon salt, ½ teaspoon pepper