Why not use YORK hydraulic oil? Your pumps will thank you for it!
YORK Hydraulic Oil
Using a suitable, high-quality hydraulic oil is vital in guaranteeing transmission with the lowest possible loss of hydraulic power from the pump to the cylinder. YORK hydraulic oils give optimum lubrication for all moving parts and protect metal surfaces from corrosion. When developing its hydraulic oils, YORK pays great attention to seal compatibility, stable viscosity behaviour, shear strength, low degree of foam formation and high resistance to ageing.