Twin Specialties' line of high viscosity index (HVI) hydraulic oils includes supreme quality anti-wear hydraulic oils specially developed for applications subjected to wide range of temperature or where small viscosity change with fluctuating temperature is needed. They are formulated with severely hydro-processed Group II base oils, a highly shear stable polymer and an advanced additive system to meet the stringent requirements of modern hydraulic systems using high pressure high output pumps and critical requirement of other hydraulic system. These HVI hydraulic oils are employed in hydraulic systems of excavators, cranes and hydrostatic drives subjected to most severe outdoor operating conditions, and hydraulic systems operating under high pressures and requiring high degree of load carrying capability and anti-wear protection. These oils are recommended for use in outdoor mobile equipment that is used year-round such as cranes, bucket trucks (cherry pickers), cranes, aerial lifts, and the like.