HMT PREMIUM HYRDAULIC OIL HVI 68 is a specialist premium quality, very high viscosity index multigrade hydraulic fluid, manufactured from highly refined base oils, carefully selected additives and special viscosity index improvers which offer superior viscosity/temperature characteristics. DIN 51524 part 3, category HVLP, 51517 part 2, ISO 6743/4, category HV, Sperry Vickers M-2950-S, I-286-S Performance levels can be subject to change. Technical Datasheets available upon request.