Oct 10, 2009 / Sir, what hydrualic fluid should I use? #11 Ken45101 Elite Member Joined Feb 14, 2009 Messages 3,669 Location southern Ohio Tractor Kubota M5040, M9540, B21 TLB, B2710, RTV900, JD 325 Skid steer, KX-121-3 mini excavator My Deere 325 skid steer uses JD motor oil for the hydraulics.