Base Oil SN 350 Overview

Base Oil SN 350 is a versatile light-to-medium grade lubricant base stock classified as Group I or Group II mineral oil. The “SN” designation stands for Solvent Neutral, indicating a refining process that removes undesirable compounds to improve performance characteristics. The “350” refers to its approximate viscosity of 350 Saybolt Universal Seconds (SUS) at 100°F, which equates to a kinematic viscosity of 67-70 cSt at 40°C.

As a leading Base Oil SN 350 Supplier, we deliver this premium petroleum-derived base stock through advanced refining methods, including solvent extraction, dewaxing, hydrotreatment, and enhanced hydrocracking. This yields a high-purity paraffinic oil with elevated saturation levels, ultra-low sulfur content, and zero detrimental impurities. The result is exceptional additive compatibility, strong low-temperature flow properties, and superior polarity for effective cooling and stable emulsions in various lubricant formulations.

Technical Description & Specifications of Base Oil SN 350

Key Properties

• Viscosity Grade: 67-70 cSt at 40°C (350 SUS @ 100°F)

• Viscosity Index: 95-100

• Flash Point: >200°C (392°F)

• Pour Point: -9°C (15.8°F)

• Sulfur Content: <0.03% (Group II)

• API Classification: Group I/II

• Appearance: Clear, light amber liquid

• Odor: Mild petroleum characteristic

Chemical Characteristics

SN 350 features a highly saturated molecular structure that delivers:

• Enhanced oxidative stability for extended fluid life

• Excellent thermal conductivity for heat transfer applications

• Superior additive solubility for customized lubricant formulations

• Low volatility reduces consumption and emissions

• Consistent batch-to-batch purity for reliable blending

Industrial Applications

This economical Group I mineral base stock and Group II base oil serve diverse industries requiring reliable lubricant performance:

Industrial Lubrication

• Hydraulic fluids for manufacturing equipment

• Gear lubricants for heavy machinery

• Compressor oils for pneumatic systems

• General-purpose machinery oils for maintenance operations

• Turbine oils for power generation equipment

Automotive Formulations

• Engine oils for standard-duty gasoline and diesel applications

• Automatic transmission fluids (ATF)

• Differential gear oils requiring anti-wear protection

• Two-stroke oils for recreational equipment

Metal Processing

• Cutting fluids and machining lubricants

• Cooling emulsions for CNC operations

• Drawing and stamping compounds

• Grinding fluids for precision finishing

• Quenching oils for heat treatment

Specialty Applications

• Plasticizer and extender oils for rubber and polymer production

• White oil formulations for cosmetic and pharmaceutical applications

• Electrical insulating fluids for transformer cooling

• Mold release agents for injection molding

• Pigment dispersions and coating formulations

SN 150 vs SN 350 vs SN 500: Grade Selection Guide

Choosing the right solvent-neutral base stock viscosity is critical for optimal lubricant performance. Here’s how these three primary grades compare:

Selection Guidance from Your Supplier of Base Oil SN 350:

• Choose SN 150 for high-speed, low-load applications requiring excellent cold-weather performance and minimal fluid drag

• Choose SN 350 for versatile lubricant blending, general industrial applications, and when balanced flow and protection are needed

• Choose SN 500 for slow-moving, heavily loaded equipment where maximum film thickness is prioritized over flow rate.

For custom lubricant formulations requiring specific viscosity grades, our technical team can advise on blending strategies to achieve target ISO VG requirements.

Core Benefits vs. Group III/Synthetics

Cost-Performance Advantage

SN 350 delivers 85-90% of synthetic performance at 40-60% lower cost, making it ideal for bulk operations and standard-duty applications where premium fluids aren’t justified. This positions our Base Oil SN 350 as the smart choice for large-volume lubricant manufacturers.

Operational Excellence

• Extended Equipment Life: Reduced wear through stable lubricating films

• Longer Drain Intervals: Oxidation resistance cuts maintenance frequency by up to 20%

• Energy Efficiency: Lower internal friction reduces power consumption

• System Cleanliness: High purity prevents sludge and deposit formation

Blending Flexibility

The balanced polarity and solubility characteristics of this hydrocracked base stock enable:

• 15-25% additive treat rates without solubility issues

• Compatibility with all major additive packages (ZDDP, detergents, dispersants)

• Stability in multi-fluid systems

• Predictable viscosity mixing for custom formulations

Limitations for Extreme Conditions

For high-stress applications exceeding 120°C continuous operation or requiring extended drain intervals beyond 10,000 hours, Group III or PAO synthetics provide superior oxidative resistance and thermal stability.

Safe Handling & Storage Guidelines

Handling Protocols for Petroleum Fractions

Personal Protective Equipment (PPE) Required:

• Nitrile gloves (minimum 4 mil thickness)

• Safety glasses with side shields

• Closed-toe shoes with chemical resistance

• Coveralls for splash protection

Spill Management:

1. Contain spill with inert absorbent (granular clay, perlite)

2. Transfer to sealed waste containers

3. Dispose of per local regulations (EPA RCRA guidelines)

4. Avoid ignition sources – flash point >200°C

Important Precautions:

• Use only in well-ventilated areas

• Keep away from strong oxidizers

• Do not use compressed air for transfer

• Ground all containers during transfer to prevent static

Storage Requirements for Mineral Base Stocks:

• Location: Cool, dry, indoor storage away from sunlight

• Temperature: Maintain below 50°C (122°F)

• Container: Steel drums, IBC totes, or carbon steel tanks

• Shelf Life: 24 months in sealed containers

• Inventory: Practice first-in-first-out (FIFO) rotation

• Inspection: Monthly checks for water contamination or sediment

Bulk Storage Systems:

• Use floating suction lines to avoid water pickup

• Install desiccant breathers on tanks

• Maintain a minimum 30 cm headspace to allow thermal expansion

• Provide secondary containment (110% capacity)

Packaging & Bulk Supply Options

As your trusted Supplier of Base Oil SN 350, we offer multiple packaging formats to optimize your logistics and cost:

Custom packaging and private labeling available for qualified orders. All containers are nitrogen-blanketed to ensure product integrity during international shipment.

Industries Served by Our Base Oil SN 350

Our lubricant base stock supports critical operations across:

• Automotive Manufacturing: Engine oil blending, parts stamping
• Metal Fabrication: CNC machining, cold forming, heat treatment
• Energy & Power: Gas turbines, wind gearboxes, hydraulic systems
• Rubber & Plastics: Tire manufacturing, polymer compounding
• Mining & Construction: Heavy equipment lubrication
• Marine: Deck machinery, auxiliary systems

Request a Quote & Technical Support

• Free formulation consulting for new lubricant blends
• Compatibility testing with your additive packages
• Sample requests (5L lab samples available)
• Competitive pricing for contract and spot orders
• Dedicated account management for volume buyers