I'm running some Castrol Syntec 5W-30 through mine to try to loosen up (I hope) my coked up rings-I am seeing 1.5 bar at idle-but only when fully warmed up-I would be concerned by oil pressure that low cold(possible oil dilution?). Amazing how the good deals always seem to end early when the desired amount isn't achieved-that should cause automatic bad feed back(just like a bid retraction would if you were a buyer). I need to list some of my old cr*p and stick it to some ebayers like everybody else does!

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1982 300DT 190K (Diesel Purge + synthetic oil=smoothness at last!!!)
2004 Ford E-350 6.0 L PSD 227K
2006 Dodge Ram 3500 SRW HO Cummins 4X4 48RE 42K (brute force tow vehicle)
2005 Scion xB wife's rolling pop can
1993 GMC Sierra C3500 6.2 142K