Kixx HYDRO HDZ
High viscosity index hydraulic fluid · VI 152 · pour point −45 °C · ISO 32/46/68
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What it is
A shear-stable, high viscosity index anti-wear hydraulic fluid for systems that see wide swings in ambient and operating temperature. Where AW and HD are steady-state oils, HDZ is the one for equipment that has to work cold and hot in the same shift.
Applications
- Mobile hydraulic equipment across wide temperature variation
- Systems with vane, gear or piston pumps
- Fork-lift trucks in refrigerated areas
- Plastic injection moulding machines
- Marine deck equipment, steering gears, bow thrusters and automatic controls
- Numerically controlled machine tools
Performance standards it is written against
- Denison Hydraulics HF-0 (ISO 32, 46, 68)
- Vickers M-2952-S and I-286-S (industrial), M-2950-S (mobile)
- Cincinnati Milacron P-68 (ISO 32), P-69 (ISO 68), P-70 (ISO 46)
- Mannesmann Rexroth RE 07 075
- Bosch RE 90220
- ISO 11158 Type HV
- DIN 51524 Part 3 HVLP
- US Steel 126 and 127
What that buys you
- Multi-viscosity behaviour reduces breakdown risk across a wide temperature range
- Anti-wear package protects surfaces when load breaks the lubricant film
- Good demulsibility and hydrolytic stability give excellent filterability
- Excellent oxidation stability for extended service life
Typical properties
| ISO grade | 32 | 46 | 68 |
|---|---|---|---|
| Density @ 15 °C, kg/l | 0.855 | 0.860 | 0.863 |
| Viscosity @ 40 °C, mm²/s | 34.1 | 44.2 | 66.7 |
| Viscosity index | 152 | 152 | 152 |
| Pour point, °C | −45 | −42 | −39 |
| Flash point, °C (COC) | 218 | 229 | 234 |
| Rust test (ASTM D665) | Pass | Pass | Pass |
| Copper corrosion, 3 h @ 100 °C | 1a | 1a | 1a |
Every figure on this page is GS Caltex’s own published value from the Kixx HYDRO HDZ product data sheet. Confirm against the current sheet for the batch you buy — ask us and we will send it with the quotation.
Why a viscosity index of 152 is the whole point
A standard hydraulic oil sits around VI 105. HDZ is published at 152, which means the oil thins far less as it warms and thickens far less as it cools. On a machine that starts cold at dawn and runs hot by afternoon — or a fork-lift moving between a refrigerated store and a yard — that is the difference between a pump that cavitates on start-up and one that does not.
The pour point says the same thing from the other end: −45 °C in ISO 32. It is a shear-stable multigrade, so the VI is not an additive effect that disappears after a few hundred hours in a high-pressure system.
It is the grade for marine deck equipment, steering gears and bow thrusters, and for NC machine tools where thermal stability of the fluid shows up directly in the part.
Related
- Kixx HYDRO HD — the steady-state heavy-duty grade
- Kixx HYDRO AW — ISO 32 up to 460
- GS Caltex Kixx hydraulic oils
- Hydraulic oil ISO VG selection guide