Will the Universal oil work in a Case 580C hydraulic system?
It should have the spec on the bucket that states what it is. I have used it in many of my toys and it is compatible to JD and most everything I have checked it against. It is on sale here for $23.99 for a 5 gallon bucket right now in both weights.
I use the premium Travelers oil in my NH575E. It says on the label it's compatible with 134D soec.