potential heavy leak..
1. head cover gasket
2. oil sump gasket
3. oil filter housing.
4. flywheel oil shield.
car with overheating history may drive to leak engine gasket. try to get bmw mechanic to identify ur engine leak.
Leaking somewhere from the engine... Couldnt find the exact leakage location.. I just can see the oil sum is wet.. And the white smoke continouesly like my car using 2t oil.. Hahahaaaa.. Do i need a top or full overhaul?