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Shell Omala S4 WE 320

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Shell Omala S4 WE 320 Previous Name: Shell Tivela S 320

Advanced Synthetic Industrial Gear Oil

Shell Omala S4 WE 320 main applications:

  • Enclosed industrial worm gear systems
  • Extended life systems
  • Other applications

Shell Omala S4 WE 320 is an advanced synthetic heavy duty industrial worm drive gear oil formulated using specially selected polyalkylene glycol base fluids and additives. It offers outstanding lubrication performance under severe operating conditions, including improved energy efficiency, long service life and high resistance to micro-pitting.

Pay attention! Price of Shell Omala S4 WE 320 drops automatically in larger quantities.

Product Description


Shell Omala S4 WE 320 Main Applications

Enclosed industrial worm gear systems Recommended for industrial worm gear reduction systems operating under severe operating conditions, such as high load, very low or elevated temperatures and wide ·temperature variations. Extended life systems Shell Omala S4 WE 320 is particularly recommended for certain systems where maintenance is infrequent or systems are ·inaccessible (eg yaw gears in wind turbine installations). Other applications Shell Omala S4 WE 320 oils are suitable for lubrication of bearings and other components in circulating and splash- lubricated systems. Shell Omala S4 WE 320 is not recommended for the lubrication of components manufactured from aluminium or aluminium alloys. For highly-loaded spur and helical gears, the Shell Omala “G” series oils are recommended. For automotive hypoid gears, the appropriate Shell Spirax Oil should be used.

Specifications, Approvals & RecommendationsShell Omala S4 WE 320

DIN 51517-3 (CLP) Fully approved by Bonfiglioli

Shell Omala S4 WE 320 benefits:

  • + Long oil life - maintenance saving
  • + Excellent wear protection
  • + Maintaining system efficiency

Performance, Features & Benefits of Shell Omala S4 WE 320

+ Long oil life - maintenance saving

Shell Omala S4 WE 320 is formulated to provide excellent oxidation and thermal stability, extending lubricant life and resisting the formation of harmful oxidation products at high operating temperatures. This helps maintain system cleanliness over extended maintenance intervals. Shell Omala S4 WE 320 offers the potential to extend service intervals significantly compared to conventional industrial gear oils.

+ Excellent wear protection

Shell Omala S4 WE 320 is formulated to have excellent load carrying capacity providing long component life even under shock loading conditions. It also has a high resistance to micro-pitting. These features provide benefits over mineral oil-based products in terms of gear and bearing component life.

+ Maintaining system efficiency"

Shell Omala S4 WE 320 offers improved energy efficiency and lower operating temperatures in worm gear applications. Rig testing has shown efficiency improvements of up to 15% in comparison with mineral oil-based products and 11% over other synthetic hydrocarbon-based lubricants. These results have been confirmed by OEM testing and field experience.

Compatibility & Miscibility

Seal & Paint Compatibility

Seal & Paint Compatibility High-quality epoxy paints are recommended, as polyalkylene glycols will tend to attack certain conventional paints. Shell Omala S4 WE 320 has been found to be satisfactory with nitrile and Viton seal materials, although Viton seals are preferred.

Change-over Procedure

Shell Omala S4 WE 320 contains polyalkylene glycols and is not compatible with mineral oils or most other synthetic lubricant types. Care should be taken when changing from such products to Shell Omala S4 WE 320. The system should be flushed with the minimum quantity of Shell Omala S4 WE 320, operating under no load and draining whilst warm. Ideally, seals exposed to mineral oils should also be replaced. Inspect the lubricant after a few days use. Ensure that oil systems are clean and free from contamination. Shell Omala S4 WE 320 is also not miscible with some other polyalkylene glycols, so caution is needed when topping-up. Generally, the preference is to avoid mixtures by draining and refilling.

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Health, Safety & Environment of Shell Omala S4 WE 320

Shell Omala S4 WE 320is unlikely to present any significant health or safety hazard when properly used in the recommended application and good standards of personal hygiene are maintained. Avoid contact with skin. Use impervious gloves with used oil. After skin contact, wash immediately with soap and water. Health and Safety Guidance on Health and Safety is available on the appropriate Material Safety Data Sheet, which can be obtained from ·Protect the Environment Take used oil to an authorised collection point. Do not discharge into drains, soil or water.

Typical Physical Characteristics of Shell Omala S4 WE 320



Shell Omala S4 WE 320

Viscosity Grade

ISO 3448


Kinematic Viscosity @400C mm2/s

ISO 3104


Kinematic Viscosity @1000C mm2/s

ISO 3104


Viscosity Index

ISO 2909


Flash Point 0C

ISO 2592 (COC)


Pour Point 0C

ISO 3016


Density @150C kg/m3

ISO 12185


FZG Load Carrying Test failure load stage

DIN 51354-2 A/8.3/90



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Additional Information

Additional Information

Brand Shell
ACEA DIN ISO OEM ANSI/AGMA 9005-E02 (EP), Bonfiglioli, David Brown S1.53.105 G, DIN 51819-3 4.3, Flender, ISO 12925-1 CKE
OEM Approval bonfiglioli, Flender
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