I would do a little troubleshooting first. It could be a simple vacuum leak. With the engine running remove the oil filler cap. There should be a vacuum if there is no leak.

Problems with the CCV systems are far more prevalent where winters are extreme. I wouldn't consider Reno having severe winters.

It is not how long a drive you take. It is about driving long enough that the oil temperature has been at normal operating temp-should be 20-20 minutes.

I haven't touched the CCV system. My input is that the design is fine. I do change my oil every 5000 miles and Texas winters are close enough to call them Michigan summers.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas