I did NOT fill it when installing it back. The reason: it's ported and will fill itself up as soon as you start the engine.
If you try to fill it up and mount it with oil, I believe you will fail, because you cannot contain the oil - it will flow out. And I am almost 100% sure of that.
Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39 M54, e53 N62 & Tribby