[Vwdiesel] Is it weird oil pressure?

[Libbybapa at wmconnect.com]

Actually my TD does not seem to have LOW oil pressure, as I have stated 
previously.  Even hot at the head never drops below 14 psi at idle.  Cruising is 
28+ hot.  I am not concerned about the overall amount of oil pressure, but 
rather it's behavior.  It would seem to me, and according to others experience, 
that the oil pressure should be independent of boost pressure.  Mine is not.  Oil 
pressure drops as boost increases.  That seems weird to me.  
I have previously forgotten to mention that the bahavior is more dramatic 
when the engine is cold (below freezing).  Oil pressure will register 70 psi 
idling, and as one accelerates it will rise normally, when boost starts to kick in 
it drops way down to 5-10 psi.  That is about a 70-80psi drop in oil pressure 
when the turbo spools with cold oil!  When hot and cruising without boost it 
will register 35psi full boost will drop it to 28psi.
Any explanations will be considered and appreciated.
Andrew