FWIW, most of the tractor hydraulic fluid is sourced from an outfit in St Louis. Weird, I know. I replaced mine a week ago. The local farm and ranch store had 3 or 4 brands (Shell, Cam, and two others whose names escape me at the moment). Anyhow, one brand had at least 4 different types of hydraulic oil (plus R&O). A Deere, Case-IH, universal, and something else. Aside from the colors and name, they all met the same standards (as printed on the side of the bucket). So look up the NH spec and read labels. In my case all but the Shell & Cam were $60 for 5 gallons. Shell and Cam were more $pecial. And met the same standards. FWIW, I bought the Case-IH because the buckets were red. Pretty.