Mobil Extra Heavy
ISO VG 150 anti-wear, r&o hydraulic oil
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Key specs
| Spec | Value | Method |
|---|---|---|
| KV40 | 146 cSt | ASTM D445 |
| KV100 | 14.4 cSt | ASTM D445 |
| Viscosity index | 96 | ASTM D2270 |
| Pour point | -21 °C | ASTM D97 |
| Flash point | 272 °C | ASTM D92 |
| Density at 15 °C | 0.89 g/cm³ | typical |
Grade checks
- KV40 is inside ISO VG 150 (135–165 cSt).
- Computed viscosity index is 96, within 2 points of the listed 96.
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: Hydraulic
- Attribute: Anti-Wear, R&O
- Synthetic: Conventional
- Copper: 1A
- Note: Hydraulic oil
Equivalents
| Oil | Score | Why |
|---|---|---|
| Chevron Clarity Machine Oil 150 | 75 | same ISO 150, VI 101 vs 96, additive aw/ro, conventional, pour -15 vs -21 |
| Castrol Hyspin AWS 150 | 67 | same ISO 150, VI 95 vs 96, additive aw, conventional, pour -15 vs -21 |
| Chevron Rando HD 150 | 56 | same ISO 150, VI 103 vs 96, additive aw, conventional, flash within 15 °C |
| Castrol Hyspin VG 150 | 38 | same ISO 150, additive ro, conventional, pour -15 vs -21 |
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
Related: Mobil, DTE Oil (Double Letter), viscosity index calculator, ISO / SAE / AGMA chart.
Questions
Is Mobil Extra Heavy an ISO VG 150 oil?
Yes. The catalogue lists it as ISO VG 150, which is a kinematic viscosity of 150 cSt at 40 °C, plus or minus 10 percent (135 to 165 cSt). Confirm the current data sheet before you fill a machine.
What is a Mobil Extra Heavy equivalent?
Published oils in the same application and grade include Chevron Clarity Machine Oil 150, Castrol Hyspin AWS 150. The match is from typical data-sheet values, not from an OEM approval. It is not an exact equivalent. Confirm the substitute with the machine builder.
Can Mobil Extra Heavy 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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