From Redline's website:
2002 on with multi-disk limited slip: 75W140
I'm running Redline 75w90 in mine. Took about 1.2 qt. There's no drain plug, you'll need a gear oil pump to drain and fill, and flexible hose to get to the bottom. I measured how much came out of mine, and needed to change hoses to get the last half a quart. The factory puts in the plug tight, and it got a bit mushed when removing, so I'm glad I had a new one to replace it with (thanks Tischer!)
Last edited by AlanAZ; 01-25-2010 at 11:51 PM.