I should have mentioned that my X5 is garage kept and the oil is changed at 7500 mile intervals is not driven short distances.

Although I'm hoping my issues are purely the CCV as it was in my E39 the potential cause is baffling. Our temps in the Pacific NW are not so cold that even if it did sit outside that I'd expect sludge build up ever.

jbond007...when you do remove your VC's please post photographs. I'd love to see what is gumming up the inside if anything.

Thanks everyone for your input. I'll let you know if my smoke clears when I replace the CCV's