I have a stock of Super Premium Universal Hydraulic fluid from Atwoods Farm and Ranch (likely similar to TSC brand). It is supposedly UDT compliant along with just about every other oil for most tractors ( NH, Case, JD, Caterpillar, Kubota, IH etc.)that uses a common sump for hydraulic /transmission with wet brakes. I think I paid $39 per 5 gallon can. My local Kubota dealer, last time I was in a year or more ago, didn't stock SUDT and said it was a waste of money for our climate. I bought the UDT for my RTV 900 50 hour service but next oil change on any of my stuff will be the Super Premium for everything, HST and gear. Physical properties like pour ability seem the same for these oils as UDT.