I am not sure with specific in detail of the internal of RB25DE.
but internal is not same as turbo skylines RB25DET.
When I had my GTS-4, Internal was Strong and power chart(dyno) curves were near 45 degrees, no flawless (maybe bcuz of Access Blitz ECU).
I never had oil drop under the engine nor diff or any liquids, only liquids came out of car is Water from aircon.
and I tell you I was threshing my car, I mean threshed it!
but always serviced with top quality oils.
cheers
Joe