Heat 2 tablespoons of oil in a skillet over medium heat. Add the beef and brwo n all sides. Transfer to Crock-Pot. Add the remaining 2 tablespoons oil to th e skillet and saute the onions and green peppers until soft. Transfer to Crock -Pot. In Crock-Pot, stir in the jalapenos, chili powder, oregano, cumin, salt, and beer. Cover and cook on Low 6 to 8 hours or on High 3 to 4 hours. Serves . Serves 6 to 8