After years of breaking my back with a shovel I have finally come into possession of a somewhat low use 4510 but unfortunately, even less maintenance. It was barely running when I got it last year. Since then I've gotten it running pretty well and I've been replacing what's worn as I'm using it and it's earning it's keep. I've poked around on this site since I got it, but I really didn't find an answer to my question. I understand "atf type a, f, dexron, or equivalent hydraulic fluid" is what the manual calls for. It's the "or equivalent hydraulic fluid" that gets me. What is a good equivalent? Is the Premium Universal Tractor Trans/Hydraulic Fluid from tsc a good replacement? What is anyone running in theirs?