What is square hump on the side of oil pan 98 mark 8?

The square hump on the side of the oil pan of a 1998 Lincoln Mark VIII is part of the design to accommodate the oil pickup tube and provide adequate oil flow to the engine. This feature helps ensure that the oil pump can effectively draw oil from the pan, especially during cornering or acceleration when oil may slosh away from the pickup. Additionally, it can also serve to enhance the structural integrity of the oil pan.