1. Product Introduction & Main Application
Arnico’s Base Oil SN 180 is a medium-to-high viscosity Group I mineral base oil, possessing a higher viscosity than SN 150 and creating a stronger lubricating film and higher thermal stability. This oil is used for the formulation of heavier-duty engine oils, high-load industrial and automotive gear oils, circulating oils, and higher-performance base oils that require resistance to pressure and temperature.
2. Technical Specifications
| Technical Parameter | Standard SN 180 Grade | High Purity Export Grade | Unit |
|---|---|---|---|
| Viscosity at 40°C | 36 – 42 | 38 – 42 | cSt |
| Viscosity at 100°C | 6.0 – 6.5 | 6.0 – 6.7 | cSt |
| Viscosity Index (VI) | ≥ 95 | ≥ 98 | – |
| Flash Point (COC) | ≥ 210 | ≥ 220 | °C |
| Pour Point | ≤ -9 | ≤ -12 | °C |
| Sulfur | ≤ 0.5 | ≤ 0.4 | % |
| Color (ASTM) | ≤ 2.0 | ≤ 1.5 | – |
3. Features & Benefits
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A Strong, Pressure-Resistant Lubricating Film: Its higher viscosity provides superior protection for components under heavy loads and mechanical shock.
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Superior Thermal & Oxidation Stability: Resists degradation and sludge formation at the high temperatures found in circulating systems and gearboxes.
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A High Flash Point: Offers enhanced safety in high-temperature applications.
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Excellent Additive Solubility: It blends well with high-viscosity additive packages for specialty oils.
4. Industrial Applications
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Engine Oils: The base for heavy-duty diesel engine oils and monograde SAE 40 and 50 oils.
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Gear Oils: The base for high-viscosity automotive and industrial gear oils.
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Circulating Oils: A lubricant for centralized lubrication systems and large bearings.
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Metalworking & Heavy-Duty Industrial Lubricants: The base fluid for extreme pressure (EP) performance lubricants.
5. Safety & Handling
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MSDS (Material Safety Data Sheet): Prolonged skin contact can cause irritation. The Arnico MSDS file is available.
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Storage Conditions: Store in dry, clean tanks, away from moisture, at ambient temperature. Filtration before use is recommended.
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Personal Protective Equipment (PPE): The use of oil-resistant gloves and safety goggles is recommended.
6. Quality Assurance & COA
Arnico SN 180 shipments are accompanied by a complete Certificate of Analysis (COA) detailing the viscosity, viscosity index, and flash point














