Quote Originally Posted by Mark
My 530i had little oil consumption once I replaced the CCV even after 140k miles so might be worth keeping an eye on it for now and then do a compression test. Are you sure that the CCV is connected properly?
100%.

As an extra test, with the old CCV connected if I undid the oil cap the engine would run fine. With the new one, it splutters indicating the valve is working properly.