🛢️ Base Oil SN650: Properties and Applications

Base Oil SN650 is a high-viscosity Group I base stock widely used in the formulation of automotive lubricants, industrial oils, greases, and process oils. Known for its excellent thermal stability and lubricating properties, SN650 is derived from solvent refining of crude oil, making it suitable for a variety of heavy-duty applications.

In this blog, we’ll explore the technical properties, applications, and advantages of SN650 base oil in modern industry.

🧪 What is Base Oil SN650?

Base Oil SN650 is a solvent neutral oil with a kinematic viscosity of ~11–13 cSt at 100°C, placing it in the heavy neutral base oil category. It is part of the Group I base oils, which are produced by solvent refining and have relatively high sulfur and aromatic content compared to Group II or III oils.

Properties of Base Oil SN650

Base Oil SN650 is classified as a Group I base oil according to the American Petroleum Institute (API). It is characterized by the following properties:

Viscosity:

Refined SN650 has a relatively higher viscosity compared to lighter grades of base oil. It falls within the viscosity range of 600 to 900 centistokes (cSt) at 40°C.

Color:

It has a darker color compared to lighter grades of base oil, such as SN150. The color of Base Oil SN650 can range from light yellow to amber.

Flash Point:

The flash point of Base Oil SN650 is typically above 200°C, indicating its high resistance to ignition.

Pour Point:

The pour point of Base Oil SN650 is relatively higher compared to lighter grades of base oil. This makes it suitable for applications in moderate to high-temperature environments.

📊 Typical Properties of SN650

🏭 Applications of SN650 Base Oil

🚗 1. Automotive Lubricants

✅ SN650 is used in blending engine oils, gear oils, and transmission fluids, especially in formulations where high viscosity and load-bearing properties are required.

⚙️ 2. Industrial Lubricants

✅ Provides excellent lubricity and film strength in hydraulic fluids, circulating oils, and industrial gear oils.

🧴 3. Grease Manufacturing

✅ Acts as the base oil in calcium, lithium, and aluminum complex greases, offering good thickener compatibility and high-temperature performance.

🏭 4. Process Oil for Rubber and Plastic

✅ Used as a plasticizer in rubber compounding and plastic processing, improving flexibility and moldability.

🧪 5. Metalworking Fluids

✅ Offers good solubility for additives and ensures heat dissipation during metal cutting and forming operations.

 Base Oil SN650 is widely used in various industries and applications due to its unique properties. Some of its common applications include:

Lubricant Manufacturing

Base Oil SN650 serves as a key ingredient in the production of lubricants. It is commonly used in the formulation of industrial lubricants, hydraulic fluids, and metalworking fluids. Its higher viscosity and thermal stability make it suitable for applications that require lubrication under heavy loads and high-temperature conditions.

Bitumen Production

Refined SN650 is often used in the production of bitumen, a crucial component in road construction and infrastructure projects. It serves as a binder to hold the aggregates together and provides durability and resistance to weathering.

Rubber Processing:

Base Oil SN650 finds application in the rubber industry, where it is used in the processing of rubber compounds. It helps improve the flow properties of rubber during processing and enhances the performance and durability of rubber products.

Additive Blending

Refined SN650 is commonly used as a blending component with other base oils to achieve desired viscosity and performance characteristics. By blending with lighter or heavier base oils, lubricant manufacturers can customize the properties of the final product to suit specific applications.

✅ Benefits of Base Oil SN650

• 🔧 High Viscosity – Provides excellent film strength and wear protection

• 🌡️ Thermal Stability – Performs well in high-temperature applications

• 🧪 Good Additive Compatibility – Easily blends with a wide range of performance additives

• 💸 Cost-Effective – An affordable solution for heavy-duty formulations

• 🛠️ Versatile Usage – Suitable across automotive, industrial, and manufacturing sectors

Load Carrying Capacity:

SN650 offers excellent load-carrying capacity, making it suitable for applications that involve heavy loads and extreme pressures. It forms a protective film between moving parts, reducing friction and wear.

Thermal Stability:

SN650 exhibits good thermal stability, allowing it to maintain its viscosity and lubricating properties even under high-temperature conditions. This ensures reliable lubrication and protects machinery components from heat-related damage.

Oxidation Resistance:

Base Oil SN650 has good oxidation resistance, which helps prevent the formation of sludge and deposits. This prolongs the life of the lubricant and reduces the need for frequent oil changes.

Cost-Effectiveness:

Refined SN650 is a cost-effective option compared to higher-grade base oils. It provides a balance between performance and affordability, making it a preferred choice for applications that require higher viscosity and load-carrying capacity.

❓Frequently Asked Questions (FAQ) – Base Oil SN650

1. ❔ What makes SN650 different from SN500?

🛢️ SN650 is heavier and more viscous, making it better for high-load and high-temperature applications. SN500 is used for medium viscosity formulations.

2. ❔ Is SN650 suitable for engine oil blending?

✅ Yes, especially for high-viscosity engine oils where film thickness and durability are required.

3. ❔ What is the source of SN650 base oil?

🛠️ It is derived from refining petroleum crude oil using solvent extraction and dewaxing.

4. ❔ Can SN650 be used in grease production?

✅ Absolutely. SN650 is widely used as the base stock in multiple lubricating grease types, providing thermal and mechanical stability.

5. ❔ What group does SN650 belong to?

📊 SN650 is a Group I base oil, characterized by solvent refining, moderate viscosity index, and higher sulfur content than Group II or III oils.

🏁 Conclusion

Base Oil SN650 is a versatile base oil with a range of applications across different industries. Its unique properties, such as higher viscosity, thermal stability, and load-carrying capacity, make it suitable for various lubrication needs. Whether in lubricant manufacturing, bitumen production, rubber processing, or additive blending applications, N650 provides effective lubrication, ensuring smooth operation and protecting machinery components from wear and tear.

Discover the properties, uses, and benefits of Base Oil SN650. Learn how this Group I base oil supports lubricant and grease manufacturing.

📣 Call to PARS Universal Bitumen

👉 Need High-Quality Base Oil SN650 for Your Industry?

We in Pars Universal Bitumen, supply refined SN650 base oil tailored for lubricants, greases, and industrial oils.

📞 Contact us now for technical specs, pricing, or bulk supply options.

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