Iso 32 and aw 32 are different terms for the same type of hydraulic oil with a viscosity of 32.

Is Iso 32 the Same As Aw 32?: Unveiling the Differences


Understanding Iso And Aw Hydraulic Oils

Iso 32 and aw 32 hydraulic oils are not the same. While both have similar viscosity, aw 32 oils also offer anti-wear protection and rust inhibition, making them more suitable for hydraulic systems. It’s crucial to understand their differences to ensure proper lubrication and system performance.

Iso 32 and aw 32 are two terms commonly associated with hydraulic oils. While they may seem similar, there are some key differences to understand. In this section, we will delve into iso hydraulic oils and aw hydraulic oils to shed light on their characteristics and applications.

Iso Hydraulic Oils Overview:

  • Iso hydraulic oils are categorized based on their viscosity, which is a measure of a fluid’s resistance to flow. The iso viscosity grade system classifies hydraulic oils on a scale ranging from iso vg 2 to iso vg 1500.
  • Iso hydraulic oils provide consistent performance across a wide range of operating temperatures and conditions.
  • They are suitable for various hydraulic systems, including mobile and industrial applications.
  • Iso hydraulic oils offer excellent oxidation stability, foaming resistance, and anti-wear properties.
  • These oils ensure smooth operation and lubrication in hydraulic systems, preventing wear and extending component life.

Aw Hydraulic Oils Overview:

  • Aw, which stands for anti-wear, is a type of hydraulic oil that contains additives to enhance its protective properties.
  • Aw hydraulic oils not only provide lubrication but also protect hydraulic system components from wear and tear.
  • They possess anti-wear, anti-corrosion, and anti-foaming properties, making them ideal for demanding environments.
  • Aw hydraulic oils are designed to form a protective film on metal surfaces, reducing friction, and minimizing wear.
  • These oils are widely used in heavy-duty hydraulic systems, such as excavators, construction equipment, and high-pressure hydraulic systems.

Iso hydraulic oils and aw hydraulic oils serve different purposes and have distinctive characteristics. Iso oils are classified based on viscosity and offer consistent performance, while aw oils contain additives to provide superior anti-wear protection. Understanding these differences is crucial for selecting the right hydraulic oil for your specific application.

Key Differences Between Iso 32 And Aw 32 Hydraulic Oils

The key differences between iso 32 and aw 32 hydraulic oils lie in their performance characteristics. While both have similar viscosity grades, aw 32 oils offer additional anti-wear protection due to their additive package, making them more suited for heavy-duty applications.

So, iso 32 is not the same as aw 32.

Viscosity grades explained:

  • Iso 32 hydraulic oil:
  • Iso 32 stands for international organization for standardization 32.
  • It is a standardized measure of an oil’s viscosity or thickness.
  • Iso 32 hydraulic oil has a viscosity of around 32 centistokes at 40 degrees celsius.
  • It is suitable for use in moderate temperature environments.
  • Aw 32 hydraulic oil:
  • Aw 32 stands for anti-wear 32.
  • It is also a measure of an oil’s viscosity.
  • Aw 32 hydraulic oil has additives that provide enhanced wear protection.
  • It has a similar viscosity to iso 32 oil, around 32 centistokes at 40 degrees celsius.
  • Aw 32 oil is commonly used in hydraulic systems subjected to high pressures and loads.

Additive packages in iso 32 and aw 32 hydraulic oils:

  • Iso 32 hydraulic oil:
  • Iso 32 hydraulic oil typically contains a basic additive package to protect against oxidation and corrosion.
  • It may also have additives to improve lubricity and reduce foaming.
  • Iso 32 oil is suitable for general hydraulic applications where wear protection is not a primary concern.
  • Aw 32 hydraulic oil:
  • Aw 32 hydraulic oil contains a higher level of anti-wear additives than iso 32 oil.
  • These additives form a protective film on metal surfaces, reducing friction and wear.
  • Aw 32 oil is designed for hydraulic systems that require superior wear protection.
  • It is commonly used in heavy-duty equipment, such as construction machinery and industrial machinery.

Performance and functionality variations:

  • Iso 32 hydraulic oil:
  • Iso 32 oil provides good overall performance and functionality in hydraulic systems operating under normal conditions.
  • It offers adequate protection against rust, corrosion, and oxidation.
  • Iso 32 oil is cost-effective and suitable for systems with lower demands on wear protection.
  • Aw 32 hydraulic oil:
  • Aw 32 oil offers enhanced performance and functionality in hydraulic systems subjected to high pressures and loads.
  • It provides excellent wear protection, reducing the risk of component damage and breakdown.
  • Aw 32 oil is recommended for systems operating in severe conditions or with critical components that require extra protection.

While both iso 32 and aw 32 hydraulic oils have a similar viscosity grade of 32, their additive packages and performance characteristics differ. Iso 32 oil is suitable for general hydraulic applications, while aw 32 oil offers superior wear protection in heavy-duty systems.

Choosing the most appropriate oil depends on the specific requirements and operating conditions of the hydraulic system.

Pros And Cons Of Iso 32 And Aw 32 Hydraulic Oils

Iso 32 and aw 32 hydraulic oils have both pros and cons. While they share similar viscosity, iso 32 oils lack the anti-wear additives found in aw 32 oils. This crucial distinction affects their performance and durability in hydraulic systems.

Understanding their differences can help users make an informed choice based on their specific needs.

Advantages Of Iso 32 Hydraulic Oils:

  • Enhanced lubrication: Iso 32 hydraulic oils offer excellent lubrication properties, ensuring smooth functioning of hydraulic systems. This reduces friction and wear on moving parts, leading to increased equipment lifespan.
  • Good viscosity stability: Iso 32 hydraulic oils maintain their viscosity over a wide range of operating temperatures, providing consistent performance in different environmental conditions.
  • Improved energy efficiency: These oils have a lower viscosity, which reduces energy consumption by hydraulic systems. This translates to improved overall efficiency and cost savings.
  • Effective rust and corrosion protection: Iso 32 hydraulic oils contain additives that protect hydraulic components from rust and corrosion, even when exposed to moisture or harsh operating conditions.
  • Reduced foaming: These oils are formulated to minimize foaming, which can interfere with hydraulic system performance and lead to reduced efficiency. By controlling foaming, iso 32 hydraulic oils ensure proper system operation.

Advantages Of Aw 32 Hydraulic Oils:

  • Excellent anti-wear properties: Aw 32 hydraulic oils are specifically designed to provide exceptional anti-wear protection, safeguarding hydraulic components from damage caused by metal-to-metal contact.
  • Enhanced oxidation resistance: These oils contain additives that resist oxidation, preventing the formation of harmful sludge and deposits. This increases the oil’s longevity and extends the maintenance intervals for hydraulic systems.
  • Improved water separation: Aw 32 hydraulic oils have superior water separation capabilities, which help to remove moisture from the system. This prevents water-induced damage and enhances overall system performance.
  • Versatile application range: Aw 32 hydraulic oils are suitable for a wide range of industrial applications, making them a popular choice across various industries.
  • Reduced maintenance costs: With their excellent anti-wear and oxidation resistance properties, aw 32 hydraulic oils minimize equipment downtime and maintenance costs, ensuring optimal hydraulic system performance.

Limitations Of Iso 32 Hydraulic Oils:

  • Limited extreme temperature performance: Iso 32 hydraulic oils may not perform optimally in extreme temperature conditions. In very cold environments, viscosity may increase, causing sluggish system operation. Likewise, in high-temperature settings, the oil’s viscosity may decrease, compromising its lubricating properties.
  • Potential seal compatibility issues: Iso 32 hydraulic oils may not be compatible with certain seal materials, leading to leakage and reduced system efficiency. It is crucial to ensure seal compatibility before using iso 32 oils.

Limitations Of Aw 32 Hydraulic Oils:

  • Higher cost: Aw 32 hydraulic oils typically come at a higher price point compared to iso 32 oils. This can add to the overall operating costs, especially for businesses with large hydraulic systems.
  • Slightly higher viscosity: Aw 32 hydraulic oils have a slightly higher viscosity than iso 32 oils. While this can offer increased protection against wear, it may also result in slightly reduced energy efficiency and increased power consumption.

Both iso 32 and aw 32 hydraulic oils have their advantages and limitations. The choice between the two depends on specific application requirements, equipment compatibility, and operational conditions.

Frequently Asked Questions On Is Iso 32 The Same As Aw 32?

What Is The Equivalent Of Iso 32 Oil?

The equivalent of iso 32 oil is sae 10w.

Can You Mix Iso And Aw Hydraulic Oil?

Yes, you can mix iso and aw hydraulic oil. Mixing these two types of oil is not recommended because they have different properties and additives. However, if you need to top off your hydraulic system and have no other option, a small amount of mixing should not cause any immediate damage.

Keep in mind that mixing oils of different types can lead to reduced performance and potentially cause issues such as poor lubrication, decreased efficiency, and accelerated wear. It is always best to use the same type of oil recommended by the equipment manufacturer to ensure optimal performance and prevent potential damage to your hydraulic system.

What Does Iso 32 Mean?

Iso 32 is a measurement used to determine the viscosity or thickness of lubricating oils. It indicates that the oil has a viscosity level of 32 centistokes at 40 degrees celsius. The iso system is internationally recognized and ensures consistency in oil viscosity ratings.

A lower iso number implies thinner oil, while a higher number indicates thicker oil. Iso 32 oil is commonly used in hydraulic systems, where low viscosity is required for smooth and efficient operation. It offers good anti-wear and oxidation resistance properties, making it suitable for a wide range of applications.

What Is Iso Grade 32 Hydraulic Oil?

Iso grade 32 hydraulic oil is a specific type of hydraulic fluid that meets the international organization for standardization (iso) specifications for viscosity. It has a viscosity of 32 centistokes at 40 degrees celsius. This means that it has a moderate thickness or resistance to flow, making it suitable for use in various hydraulic systems.

Iso grade 32 hydraulic oil provides lubrication, heat dissipation, and corrosion protection to hydraulic components, allowing them to operate smoothly and efficiently. It is commonly used in applications such as hydraulic systems in construction equipment, industrial machinery, and automotive power steering systems.

Using the correct iso grade hydraulic oil is important to ensure optimum performance and longevity of hydraulic equipment.


Understanding the differences between iso 32 and aw 32 can be crucial when it comes to choosing the right lubricant for your machinery. While they may share similar viscosity grades, iso 32 and aw 32 are not the same. Iso 32 is a standard international measurement, while aw 32 refers to anti-wear hydraulic oil with additives.

Aw 32 offers enhanced protection against wear, rust, and oxidation, making it suitable for heavy-duty applications. It is crucial to consult the manufacturer’s recommendations and consider the specific needs of your equipment before making a decision. By using the appropriate lubricant, you can ensure optimal performance, extended machinery life, and reduced maintenance costs.

So, next time you are selecting a hydraulic oil, be sure to distinguish between iso 32 and aw 32 to keep your machinery running smoothly. Choose wisely, and enjoy the benefits of a well-lubricated system.

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