Mobil Mobil SHC 626
ISO VG 68 extreme pressure gear oil
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|---|---|---|---|
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Key specs
| Spec | Value | Method |
|---|---|---|
| KV40 | 68 cSt | ASTM D445 |
| KV100 | 11.6 cSt | ASTM D445 |
| Viscosity index | 165 | ASTM D2270 |
| Pour point | -54 °C | ASTM D97 |
| Flash point | 225 °C | ASTM D92 |
| Density at 15 °C | 0.86 g/cm³ | typical |
Grade checks
- KV40 is inside ISO VG 68 (61.2–74.8 cSt).
- Computed viscosity index is 166, within 2 points of the listed 165.
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: Extreme Pressure
- Synthetic: Synthetic
- AGMA class: AS
- FZG fail stage: 12
- Copper: 1B
- Note: Meets AGMA 9005-F16.
Sulfur, EP additives and yellow metal
Extreme-pressure gear oils use sulfur compounds so steel teeth do not weld under shock. That same sulfur can tarnish or pit copper, brass and bronze: a bronze worm wheel, a brass cage, a cooler tube. ASTM D130 sits a polished copper strip in the oil and scores the colour. 1A and 1B are the ratings to keep when yellow metal shares the oil. The strip below is that test at room temperature.
How lubricant-induced copper corrosion works
Equivalents
| Oil | Score | Why |
|---|---|---|
| Chevron Meropa 68 | 45 | same ISO 68, VI 101 vs 165, additive ep, flash within 15 °C, AGMA AS, buyable now |
| Shell Omala S2 G 68 | 45 | same ISO 68, VI 99 vs 165, additive ep, flash within 15 °C, AGMA AS, buyable now |
| Castrol Optigear Synthetic PD 68 ES | 41 | same ISO 68, VI 151 vs 165, synthetic, pour -51 vs -54 |
| Chevron Meropa XL 68 | 40 | same ISO 68, VI 110 vs 165, additive ep, flash within 15 °C, AGMA AS |
| Shell Omala S2 GX 68 | 40 | same ISO 68, VI 100 vs 165, additive ep, flash within 15 °C, AGMA AS |
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: Mobil, Mobil SHC 600, viscosity index calculator, ISO / SAE / AGMA chart.
Questions
Is Mobil Mobil SHC 626 an ISO VG 68 oil?
Yes. The catalogue lists it as ISO VG 68, which is a kinematic viscosity of 68 cSt at 40 °C, plus or minus 10 percent (61.2 to 74.8 cSt). Confirm the current data sheet before you fill a machine.
What is a Mobil Mobil SHC 626 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 Mobil Mobil SHC 626 be mixed with another oil?
Mixing two oils that share a base family is sometimes done and sometimes a mistake. Do not mix this oil with a PAG. For any other mix, follow the maker's change-over guidance and the machine manual.
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