While not a definitive view of the bypass, this NPS looks to use Wix's traditional metal spring thread end bypass, and not a combo valve. Interesting. Still wonder how that choice is decided.
Agree it looks kinda nasty inside. Based on that I'd be thinking of shortening up the oci.
Thanks for the pics.
No idea how many miles -- this is what was on there when I got it.
As for the "crud" accumulation, what you're looking at isn't from a malfunctioning intake, but actual coking. In other words, the oil has literally turned to granular carbon.