Base Oil

Base Oil

BASE OIL – PRODUCT SPECIFICATIONS

(Group I, Group II, Group III – SN, N, and VHVI grades)

Base Oil is a refined petroleum product used as the main component in lubricants, engine oils, hydraulic oils, transformer oils, and industrial fluids.


1. CLASSIFICATION (API Groups)

Group Sulfur Content Saturates Viscosity Index (VI) Typical Products
Group I >0.03% <90% 80–105 SN150, SN350, SN500, SN900
Group II ≤0.03% ≥90% 90–120 N150, N500, N600
Group III ≤0.03% ≥90% ≥120 VHVI 2, 4, 6

2. TYPICAL SPECIFICATIONS BY GRADE


A. Group I Base Oil – Solvent Neutral (SN Grades)

SN 150

Parameter Specification
Appearance Bright & clear
Kinematic Viscosity @ 40°C 28–32 cSt
Kinematic Viscosity @ 100°C 4.8–5.3 cSt
Viscosity Index 95–105
Flash Point (COC) ≥ 200°C
Pour Point −6°C to −9°C
Color (ASTM) 1.0–1.5
Sulfur 0.2–0.5%

SN 350

Parameter Specification
KV @ 40°C 45–55 cSt
KV @ 100°C 6.8–7.5 cSt
Viscosity Index 95–105
Flash Point ≥ 210°C
Pour Point −6°C to −9°C

SN 500

Parameter Specification
KV @ 40°C 95–105 cSt
KV @ 100°C 10.5–11.5 cSt
Viscosity Index 95–105
Flash Point ≥ 220°C
Pour Point −6°C to −9°C

SN 900

Parameter Specification
KV @ 40°C 170–200 cSt
KV @ 100°C 14.0–17.0 cSt
Flash Point ≥ 240°C
Pour Point −6°C to −9°C

B. Group II Base Oil – N Grades

N 150

Parameter Specification
KV @ 40°C 28–32 cSt
KV @ 100°C 4.9–5.4 cSt
Viscosity Index 105–115
Sulfur ≤ 0.03%
Color ≤ 1.0

N 500 / N 600

Parameter Specification
KV @ 40°C 90–110 cSt
KV @ 100°C 11–12.5 cSt
Viscosity Index 105–120
Sulfur ≤ 0.03%
Noack Volatility ≤ 15%

C. Group III Base Oil – VHVI (Very High Viscosity Index)

VHVI 4 (Base Oil 4 cSt)

Parameter Specification
KV @ 100°C 3.8–4.2 cSt
Viscosity Index ≥ 120
Flash Point ≥ 220°C
Sulfur ≤ 0.005%

VHVI 6 (Base Oil 6 cSt)

Parameter Specification
KV @ 100°C 5.8–6.3 cSt
Viscosity Index ≥ 130
Sulfur ≤ 0.005%

3. General Quality Requirements

  • Free from water

  • Free from sediments and particulates

  • Bright & clear appearance

  • No rancid or burnt odor

  • Passes copper strip corrosion test


4. Packaging

  • 200L steel drums

  • 1000L IBC tanks

  • Flexi-bags (20–22 MT per container)

  • Bulk ISO tank shipments


5. Applications

  • Automotive engine oils

  • Hydraulic fluids

  • Marine lubricants

  • Gear oils

  • Greases

  • Transformer oils (special grades)

  • Rubber process oils

Category