High Viscosity Hydraulic Oil (HV Hydraulic Oil)—also known as HVLP hydraulic fluid or high viscosity index hydraulic oil—is a premium-grade lubricant engineered to deliver consistent performance across a wide temperature range. Unlike standard antiwear hydraulic oils, HV fluids contain advanced viscosity index (VI) improvers that allow the oil to maintain stable thickness and film strength whether operating in cold starts or high-heat environments. This makes HV hydraulic oil the preferred choice for systems exposed to extreme temperature fluctuations or outdoor conditions.
High VI hydraulic oils are ideal for mobile equipment, construction machinery, hydraulic systems operating in changing climates, and outdoor industrial applications where start-up in cold temperatures and long-duration operation in heat are both required. Equipment such as cranes, loaders, excavators, forestry harvesters, lift trucks, hydraulic power units, and mining equipment often require HV fluids to maintain consistent system pressure, protect components, and reduce energy loss due to fluid thinning or thickening.
Common High Viscosity Index Hydraulic Oil Grades and Their Uses:
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HV 32 (High VI AW 32) – Ideal for colder climates or precision hydraulic systems where low starting viscosity and smooth flow are essential.
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HV 46 (High VI AW 46) – A widely used grade offering excellent balance for mobile and stationary hydraulic systems across moderate to variable climates.
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HV 68 (High VI AW 68) – Thicker oil ideal for heavy-duty hydraulic applications or equipment operating in high-temperature or high-load environments.
These HVLP hydraulic fluids meet or exceed ISO 11158 (HV), DIN 51524 Part 3, and major OEM performance specifications, offering superior antiwear protection, excellent oxidation stability, corrosion resistance, and foam suppression. Their high viscosity index ensures reliable operation and minimal fluid breakdown over long service intervals, especially in outdoor or remote applications where fluid consistency is critical.
Available Packaging Options:
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5-gallon pails – Perfect for jobsite or mobile use
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55-gallon drums – Standard for industrial and commercial hydraulic operations
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275-gallon totes – Cost-effective bulk solution for high-volume users and fleet maintenance
If your hydraulic system operates in extreme cold starts, hot weather, or cycles between both, high viscosity index hydraulic oil ensures stable protection, improved energy efficiency, and reduced mechanical stress. Choose from HV 32, HV 46, or HV 68 hydraulic oil grades to match your equipment's performance demands and operating environment.
