oil consumption on 2003 BMW 330i

Hi guys my BMW consumes a lot of engine oil, even i change type and quality and still consumes. And also there is no smoke coming out of exhaust

Asked by for the 2003 BMW 330i
Make sure oil is recommended
Make sure you don't have any external leaks
If the cylone/breather system is blocked, oil vapour is burned more excessively
Is the engine sludged un the cap? If so could possibly indicate a blocked cyclone.