BTW the oil rings brought my HOT oil idle pressure up a smidge...not a whole lot. Mine were so brittle I grabbed onto them with the dikes (wire cutters) and they just shattered into pieces (literally).

Replace them regularly becuase where they reside, it gets sorta hot.

Make sure you oil cooler is clean and the hoses are in good working order. My idle oil pressure is around 1.5-1.9 bar depending on how much the turbo has been heating things up