FWIW, I bin runnin  Nulon full synthetic  in all my gear for a couple years now,

Bikes, Generators, utes, wagon, loader, small engines,,,diesel and petrol, the lot, and it's proved to be pretty bloody good in all aspects.

15 W 50 in engine, (prolly go to 10 W 60 in summer when donks have done 50 K plus)
10 W 60 in primary
75 W 90 Performance Smooth Shift in the trannys, smooth shifts and quiet.