Best cold weather Hydrostatic/hydraulic fluid?

[toddbiss]

When I had my Kubota I used SUDT and I seemed to warm up and work better in the cold weather, is there and alternative I could use in my Kioti this winter or just spend the big bucks and buy Kubota SUDT for my Kiotit?

 

[art]

Second best we have found is the ultra hytran, it handles the moisture very well although not quite as thin and smooth as the Super UDT.