The shear stable polymers in Castrol Dual Range HV keep the fluid's viscosity consistent over a wide range of temperatures. High operating temperatures, which may breakdown other hydraulic oils leading to damage to metal parts and increased oxidation are easily managed by Castrol Dual Range HV.

Also contributing to Castrol Dual Range HV's excellent viscosity performance is its extra high viscosity index. The high viscosity index of Castrol Dual Range HV (at least 140) indicates that as the temperature dramatically rises or falls, Castrol Dual Range HV will not excessively thin or thicken. This protects your customer's equipment from premature wear or oil breakdown and leads to decreased maintenance costs.