ingersoll 3018 yard tractor question

[trialsguy]

I am building a wood splitter to run off the hydraulics of the tractor

What type fluid can I use in place of the "Ingersoll custom blend motor oil, this oil is custom blend for hydraulic applications" taken right from the manual. I have no idea where to buy ingersoll special blend motor oil and figure that there has to be a comparable oil.
calls for 20W40 for 32*f and 5W20 for below 32*

I dont think I have ever seen the hydraulic fluid referred to hydraulic oil but then again I havent messed with a ingersoll tractor

Thanks

Bob

 

[trialsguy]

I was at tractor supply today and noticed that some of the hydraulic fluid was referred to hydraulic oil so thats a first for me, now that I am paying attention to it I noticed that there is such a thing, Now I wonder if there is hydraulic oil at tractor suppy that is labeled 20w50 or 5w30 gotta check it out.