The Shell Donax TD that's on the list has changed to Shell Spirax md/s4txm about two years ago. An easy hydraulic fluid to get is from Tractor Supply. Their "Premium" Hydraulic fluid is a multi viscosity fluid and meets the specs. Other members have used it with good results. That's what I'm going with on my next change. I have been using Rotella 5W-40 full synthetic engine oil year round because I can go from single digits in the Winter to 80 plus in the Summer. Enjoy the new toy.