Ashless Hydraulic 46 Oil Equivalent — Brand Comparison & Cross Reference
Ashless ISO VG 46 hydraulic oil is a zinc-free hydraulic fluid suitable for systems with silver-plated components or where zinc-free formulations are required. Common in marine and electrohydraulic applications.
Brand Comparison Table
The following table shows the Ashless Hydraulic 46 equivalent product from each major lubricant brand. Use this to find a direct substitute when switching suppliers or sourcing alternatives.
| Brand | Product Name |
|---|---|
 Sinopec | Ashless LHM 46 |
Common Applications
- Marine hydraulic systems with silver-plated pumps
- Electrohydraulic servo valves
- Systems requiring zinc-free hydraulic fluid
- Environmentally sensitive hydraulic applications
- High-precision hydraulic test rigs
Frequently Asked Questions
Why use ashless hydraulic oil instead of standard HM oil?
Ashless (zinc-free) hydraulic oils are required when systems contain silver-plated components, as zinc additives in standard HM oils are corrosive to silver. They are also preferred in environmentally sensitive and marine applications.
Does ashless hydraulic oil provide adequate wear protection?
Yes. Modern ashless hydraulic oils use phosphorus and sulphur-based anti-wear additives instead of zinc (ZDDP). They provide comparable pump protection and meet major pump manufacturer test requirements.
What is the difference between ashless and biodegradable hydraulic oil?
Ashless refers to the absence of metallic (zinc) additives, while biodegradable refers to the base oil's ability to break down naturally. An oil can be ashless without being biodegradable, and vice versa. Some products are both.
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