Shell Omala S3 W 100
ISO VG 100 anti-wear gear oil
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Key specs
| Spec | Value | Method |
|---|---|---|
| KV40 | 103 cSt | ASTM D445 |
| KV100 | 21.6 cSt | ASTM D445 |
| Viscosity index | 238 | ASTM D2270 |
| Pour point | -42 °C | ASTM D97 |
| Flash point | 225 °C | ASTM D92 |
| Density at 15 °C | 1.037 g/cm³ | typical |
Grade checks
- KV40 is inside ISO VG 100 (90–110 cSt).
- Computed viscosity index is 238, within 2 points of the listed 238.
Viscosity and temperature
ASTM D341 (Walther) fitted to the published KV40 and KV100. It is an interpolation between those two points, and it is not meaningful below the pour point. Move the control to read a temperature.
Classification
- Category: Gear
- Attribute: Anti-Wear
- Synthetic: Conventional
- Base oil: V PAG
- FZG fail stage: 12
- Copper: Unlisted
- Note: Water soluble gear oil
Equivalents
| Oil | Score | Why |
|---|---|---|
| Mobil Glygoyle 100 | 35 | same ISO 100, VI 190 vs 238, additive aw, FZG 12 |
| Castrol Optigear Synthetic 800/100 | 20 | same ISO 100, VI 205 vs 238, pour -45 vs -42, FZG 12 |
Scores use published typical data. This is not an exact equivalent, and it is not an OEM approval. Confirm the substitute with the machine builder.
Documents
- Product data sheet
- Specs last read from the data sheet on 2026-09-09.
Related: Shell, Omala S3 W, viscosity index calculator, ISO / SAE / AGMA chart.
Questions
Is Shell Omala S3 W 100 an ISO VG 100 oil?
Yes. The catalogue lists it as ISO VG 100, which is a kinematic viscosity of 100 cSt at 40 °C, plus or minus 10 percent (90 to 110 cSt). Confirm the current data sheet before you fill a machine.
What is a Shell Omala S3 W 100 equivalent?
No other brand in this catalogue clears the equivalents bar for this oil yet (same application, same grade, compatible base oil, and a score of 60 or more). That is not proof that nothing else works. Check the machine manual.
Can Shell Omala S3 W 100 be mixed with mineral oil or PAO?
No. This oil is a PAG (polyalkylene glycol). PAG does not mix with mineral oil or PAO. Drain and flush before changing into it or out of it.
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