Hydraulic Oil ISO VG 68

Product Overview

SiNDA Hydraulic Oil 68 is an industrial-grade, mineral-based anti-wear hydraulic fluid designed for systems that specify ISO VG 68 viscosity. It is suited to stationary industrial hydraulic equipment, particularly where operating temperatures are relatively stable and consistent fluid performance is required for pumps, valves, and servo/control components.

formulated in line with common ISO 11158 HM and DIN 51524-2 (HLP) performance requirements, balancing wear protection, oxidation resistance, and cleanliness.

Operational Applications

SiNDA Hydraulic Oil 68 is suitable for a wide range of industrial hydraulic systems, including:

• Stationary industrial hydraulic units (temperature-controlled environments)
• Machine tools, presses, and general production machinery
• Injection molding and metal forming equipment
• Centralized hydraulic systems operating at controlled temperatures

It is particularly appropriate when equipment manuals specify ISO VG 68 anti-wear hydraulic oil and stable viscosity is needed to maintain smooth system response and consistent control behavior.

Technical Specifications

Formulated with high-quality mineral base oils and a carefully selected additive system, SiNDA Hydraulic Oil 68 delivers the viscosity profile required for ISO VG 68 applications. The formulation provides:

• Stable kinematic viscosity at operating temperature
• Anti-wear protection suitable for common industrial pump designs
• Resistance to oxidation to help maintain oil integrity during service life
• Corrosion inhibition to protect internal metal surfaces

The formulation is aligned with DIN 51524-2 and ISO 11158 (HM) system requirements to support consistent daily hydraulic performance.

Performance Characteristics

Wear Protection:

Anti-wear additives help minimize metal-to-metal contact in pumps and valves, helping extend pump and valve service life and reducing wear-related maintenance interruptions.

Oxidation Stability:

Oxidation resistance helps maintain fluid integrity, supporting longer service intervals and reducing varnish and deposit tendency.

Water Separation:

Good demulsibility allows incidental water contamination to separate from the oil, helping reduce corrosion risk and preserving lubrication performance.

Air Release and Foam Control:

Efficient air release characteristics promote stable hydraulic response and minimize spongy or erratic system behavior.

Compatibility & Limitations

Compatible With

• Gear, vane, axial piston, and radial piston pumps
• Standard sealing materials and elastomers used in industrial hydraulics
• Hydraulic systems designed for ISO 11158 HM / DIN 51524-2 performance levels

Not Recommended When

• Outdoor or mobile equipment exposed to wide ambient temperature swings (consider HVLP where a higher viscosity index is required)
• Mobile machinery requires high viscosity index (HVLP) fluids
• Applications requiring NSF H1 food-grade hydraulic fluids.
• Systems are exposed to extreme cold starts or high thermal shock

Understanding these limitations helps avoid misapplication and ensures optimal system reliability.

Selection Guidance

Choose this product if your system:

• Operates in temperature-stable industrial environments
• Specifies ISO VG 68 viscosity
• Runs under moderate to sustained hydraulic load
• Prioritizes cost-effective, reliable industrial performance

Consider alternative viscosity grades or HVLP fluids if the system experiences frequent cold starts, outdoor exposure, or significant temperature swings.

Compliance & Standards

SiNDA Hydraulic Oil 68 is formulated in line with commonly referenced industrial hydraulic standards, including:

• ISO 11158 (HM)

• DIN 51524-2 (HLP equivalent performance positioning)

The formulation is aligned with the requirements of widely used ISO VG 68 hydraulic systems without implying specific OEM approvals.

Industrial FAQ

When should ISO VG 68 not be used?

If your system operates in cold climates, outdoors, or under wide temperature variations, a lower viscosity grade or HVLP fluid may be more appropriate.

What is the difference between ISO 46 and ISO 68?

ISO 68 is more viscous than ISO 46 at the same temperature, typically offering higher film strength and better wear protection at higher loads or operating temperatures—while ISO 46 may improve efficiency and cold-start flow in cooler conditions.

Can this oil tolerate small amounts of water?

The formulation is designed for good demulsibility, allowing incidental water contamination to separate. However, persistent water ingress should be addressed to avoid corrosion and additive depletion.

Is HVLP oil required for all systems?

No. HVLP fluids are necessary primarily for mobile or outdoor equipment with large temperature swings. Many stationary systems perform optimally with standard HM/HLP oils like ISO 68.