Curious about using hydraulic oil other than Kubota brand

[MTGreen]

Might be fine in a geared tractor with a dry clutch and an old pump, not so much in an hst

 

[Texasmark]

Just wondering if anyone has experience with using other name brands of hydraulic oil in their HST systems?
Have 5 pails of this stuff in the pic and a pail of shell tellus View attachment 786561
Thanks, Billy

Read the label on the container. Most premium oils have the applications on the back of the container and specify JD J20C (my watch for) or Kubota UTD fluid. Tractor mfgrs. aren't in the oil business....they are in the specification for their equipment business.