What does HVI mean?
A hydraulic oil with a High Viscosity Index (HVI) is recommended primarily for mobile construction equipment and other hydraulic systems that are subject to wide ambient and system operating temperatures. With the use of HVI oils hydraulic pumps can safely be started at low ambient temperatures. CITGO products such as Super MV (VI of 202) and All Temp Hydraulic Oil (VI of 155) are HVI Hydraulic oils.