The Vanos seals leak into the crankcase so nothing visible. The oil feed for the Vanos is an external line so might try pinching that off to see what happens. I guess it is possible that you actually blew a Vanos seal which would explain your symptoms.
You won't get an oil pressure reading from a scan tool because there is no sensor for the DME to read it.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)