Absolutely!

As a point of reference, what oil pressure does the M96 engine run at hot >@ 3000rpm?
Is there a difference in pressures between the 2,5/2,7/3,2 l engines?

The only reference I could find was a 2003 996 owner's manual. It said the pressure should be approximately 3.5 bar at 5000 rpm with a fully warmed up engine. It seems like my 2.7 runs at about that level.

For the volt meter the normal range is 12-16 volts. If it is below 12 with the engine running, you should "have the charging system checked at an authorized Porsche dealer."