- Biodegradable gears
ISO VG 100
Biodegradable ester-based fluid for marine gears and bearings
US EPA Vessel General Permit (VGP)
EPA permit requiring environmentally acceptable lubricants at oil-to-sea interfaces of vessels.
FZG gear scuffing test — ISO 14635-1
The ISO version of the FZG gear scuffing test; the result is the load stage reached without scuffing under test condition A/8.3/90.
Industrial gear oil CLP E 68 / 100 /150 — DIN 51517, part 3
Ester-based EP gear oils to DIN 51517-3 in three viscosity grades; biodegradable and heat-resistant.
OECD 301B biodegradability above 60 %
OECD test measuring carbon dioxide evolved over 28 days; above 60 % counts as "readily biodegradable".
| Property | Typical value | Method |
|---|---|---|
| ISO viscosity grade | 100 | |
| Kinematic viscosity @40°CcSt | 100 | ISO 3104 |
| Kinematic viscosity @100°CcSt | 14 | ISO 3104 |
| Viscosity index | 140 | ISO 2909 |
| Flash point COC°C | 280 | ISO 2592 |
| Pour point°C | -24 | ISO 3016 |
| Density @15°Ckg/m3 | 919 | ISO 12185 |
| Demulsificationmaximum | 30 mins | ISO 6614 |
| FZG Load carrying Testminimum | 13 | ISO 14635-1 |

Environmentally Acceptable Saturated Synthetic Ester Gear and Bearing Fluid. Shell Naturelle S4 Gear Fluid is an advanced synthetic fluid for gearing applications such as thrusters and propulsion drives. Manufactured from fully saturated esters, it is designed to deliver superior load-carrying performance while meeting the requirements for Environmentally Acceptable Lubricants (EAL) as defined by the US EPA 2013 Vessel General Permit (VGP). Shell Naturelle S4 Gear Fluid 100 is the ISO VG 100 grade: about 100 cSt at 40 °C and 14 cSt at 100 °C, viscosity index 140, pour point -24 °C. Its data sheet lists Kawasaki Heavy Industries, Nakashima Propellers, Holland Roerpropeller (ZF), Sperry Marine, SKF Blohm & Voss, Wärtsilä, Aegir Marine and IHC Sealing Solutions among the equipment makers' specifications and recommendations.
Frontier I.G. offers a complete range of solutions across mobility as a whole. Leading lubricants, tyres and innovative technical solutions for automotive, industry and agriculture.