Well the stuff I'm using in the M32 on the VXR is 75w80
Fuchs TITAN SINTOFLUID SAE 75W-80 synthetic manual transmission fluid
http://www.opieoils.co.uk/p-981-fuchs-t ... fluid.aspx
Gives a much better cold gear change, and really smooth when warm.
Vocky is running the same oil was you've bought in the same M32 box, and it's a lot cheaper.
This was my thread for the M32, but as it takes the same oil by default, suppose the same things apply, just a different volume required.