Universal Tractor Hydraulic Fluid

Does anyone know if it is safe to run this stuff in old hydraulic systems??? I have a Cat D4 5T and I think the previous owners just ran 30 wt oil in the hydraulic system. My cat has a front mounted hydraulic pump on it.

I keep seeing this stuff for sale & I have been curious about it. It claims to have rust, corrosion & oxidation inhibitors...so I believe it is yellow-metal friendly.

Right now, until the 31st of July, it is on sale at TSC for $24 for 5 gallons. For that price, if it will work, I might just stock up on it.

Are there other fluids that will work...or fluids that I should avoid. I'm assuming that the hydraulic systems aren't real picky...but you know what they say about assuming 😞

its what i use. use non detergent straight weight iffen you don't go universal hydraulic.
thanks for the tip.