Amsoil makes a wide variety of products, but yes, the synthetic ATH hydraulic oil is what I put in yesterday. But I don't know when I'll learn the results. This weather is not cooperating at all this year. It's just staying wet, raining again this morning when everything is already saturated, and 100% humidity. It's really weird. The tractor has not been out of the shop building in several days, but the frame, axles, and tires were dripping a puddle of water in the floor yesterday while I was changing the oil, just from the humidity and condensation. Everything is greening up, I need to get the garden planted, and already need to mow the yard. Whenever it dries up the tractor will definitely get a workout and we'll see how it does.
Bird