ISO 32 High Viscosity Index Hydraulic Oils have similar thickness to SAE 10W at operating temperature. Additionally these HVI (or multi-viscosity) hydraulic fluids are formulated to maintain their ideal viscosity, or thickness, over an extreme range of temperatures. The higher the VI, the wider the temperature range. 

We carry ISO VG HVI hydraulic fluid from industry leaders like Mobil, Chevron, Kendall, and Sunoco.