[V8] Mix Pentosin 11S with Mobil hydraulic fluid?

[QuickAudi at aol.com]

Is the above ok?  I am fixing to replace all of my hoses (thanks, Spokane House of Hose!) and I have already replaced the power steering pump and rack.  Obviously, those have been running the Pentosin, and I'd rather not have to but little cans all the time when I can buy 5 gallons of the stuff.  Are the two compatible so that I won't mess up any seals?

Joel
'90 V8q
'86 5kcstq