UNIVIS ™ HVI 13 and 26 are designed to provide excellent viscosity control in applications where the ambient temperature can vary widely, from very cold to hot. In addition to the oil's wide operating range, these fluids provide excellent abrasion protection, strong rust and corrosion protection, fast foam and air separation and excellent oxidation resistance. These performance characteristics help provide the protection required to make the hydraulic systems more efficient over a wide operating temperature range.