Bio-Hydraulic Oils S Type are hydraulic lubricants that are not only effective but also environmentally conscious. They are composed of biodegradable components, including synthetic fatty esters, stabilizers, anti-wear additives, corrosion inhibitors, and foam inhibitors. These oils meet the stringent biodegradability standards outlined in OECD 301B and adhere to HEES requirements.

What sets Bio-Hydraulic Oils S Type apart is their complete absence of mineral lubricating oils. Instead, they rely on high-quality synthetic fatty esters derived from Turkish harvested vegetable oils. Compared to mineral oil-based lubricants, these bio-hydraulic oils are significantly more biodegradable, less hazardous, and well-suited for use in environmentally sensitive areas. They pose a lower risk of harm to soil, waterways, and other environmental components.

Bio-Hydraulic Oils S Type offer exceptional viscosity-temperature characteristics, owing to the naturally high viscosity indices of the vegetable oil-based synthetic esters. They are specially formulated to excel in high-exposure or high-temperature applications. The optimal operating temperature range for these oils spans from -10°C to 100°C, making them versatile and reliable across a range of conditions.

Compared with mineral oil based lubricants Bio-Hydraulic Oils S Type are:

  • Enhanced Safety for Users and the Environment
  • Increased Biodegradability for Eco-friendliness
  • Reduced Toxicity – Free from Heavy Metals
  • Improved Performance Characteristics
  • Enhanced Viscosity Stability at Elevated Operating Temperatures Thanks to a Higher Viscosity Index
  • Enhanced Lubricity Leading to Lower Equipment Operating Temperatures

Bio-Hydraulic Oils S Type were developed to meet and exceed the current requirements of the agricultural, forestry, heavy engineering, construction and marine equipment industries.

Bio-Hydraulic Oils S Type can be used in mobile or stationary equipment such as forklifts, cranes, tractors, graders, bulldozers, hoists, marine equipment, mining equipment, ski lifts, etc. and is particularly suited to use in environmentally sensitive areas such as:

  • National or State parks
  • Near or on waterways
  • Recreational areas
  • Road, rail and tramways
  • Local Government Maintenance Vehicles
  • Water, Electricity, Telecommunication and Gas Service providers etc.

Bio-Hydraulic Oils S Type are fully miscible and compatible with mineral oils therefore changing to

Bio-Hydraulic Oils S Type is simple as no prior system flushing is required.

Bio-Hydraulic Oils S Type contain ester components that may be incompatible with certain elastomers used as seals, hoses or other components in the customer’s equipment. Prior to full scale commercial use, it is recommended that compatibility with system components is determined by the customer.

Elastomer Compatibility

ISO 1629
NBRMedium to high nitrile rubber (Buna N,>30% acrylonitrile)CCC
FPMFluoroelastomer (Viton®)CCC
IIRButyl rubberSNN
EPDMEthylene propylene rubberNNN

**(S- Static, MD- Mild Dynamic, D- Dynamic)

C = Compatible

S = Satisfactory for short term use, but replacement with a completelycompatible elastomer is recommended at the earliest convenience. N = Not Compatible

Avoid contamination with water. Where possible drying equipment should be used and water drained after any shut-down period.

Vesta suggests that the equipment manufacturers’ recommendations for viscosity grade, performance requirements and general operating conditions should be checked prior to use.


PropertyUnitTest MethodTypical Results
ISO Viscosity  4668
Code VI5-  29162921
AppearanceVisualYellow to amber fluid
Density @ 15°Ckg/LASTM D12980.920.92
Kinematic Viscosity @ 0°Cmm2/sASTM D445320554
Kinematic Viscosity @ 20°Cmm2/sASTM D445109135
Kinematic Viscosity @ 40°Cmm2/sASTM D44547.568
Kinematic Viscosity @ 100°Cmm2/sASTM D4459.512.5
Viscosity IndexASTM D2270190185
Pour Point°CASTM D97<-30<-30
Flash Point Open Cup°CASTM D92300304
Fire Point°CASTM D92360360
Air Release ASTM D34277 min7 min
Corrosiveness to CopperASTM D1301a1a
Rust Preventing CharacteristicsASTM D665PassPass
Acid Numbermg KOH/gASTM D97422
Foam Test @ 25°Cml-mlASTM D89250-050-0
Dry TOSThrsASTM D943 mod.800800
Fire Point°CASTM D92360360
Pump Test ASTM D2882<5 mg wear<5 mg wear
Gear Lubrication DIN 51354-2>12 FZG load stage>12 FZG load stage
Water Separabilityml-ml-mlASTM D140141-39-0 (30) min42-38-0 (30) min

Available in:         200 Litres, and 20 Litres

Item Code:        VI5-2916 (46), VI5-2921 (68)

Product Informations

Product Data Sheet

Material Safety Data Sheet