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SOLAR Optima Series Automatic Manual Gear Oils GL-4 API 90

Description

Solar Manual Gear Oil SAE 90 GL-4 is a high-quality, extreme pressure gear lubricant formulated with premium base oils and carefully selected additives. It provides excellent protection for gearboxes and manual transmissions operating under moderate to severe service conditions. Designed to meet the performance standards of API GL-4, this gear oil ensures smooth gear shifting, reduced wear, and long-lasting performance in a wide range of automotive and industrial gear applications.

Available API
90
Applications
  • Manual transmissions and transaxles in passenger cars, trucks, buses, and off-road vehicles requiring GL-4 fluids.
  • Suitable for light- and heavy-duty commercial vehicle gearboxes and differentials not requiring API GL-5 protection.
Features & Benefits
    • Excellent Gear Protection: Protects against scuffing, pitting, and wear in gears and synchronizers.
    • Oxidation Stability: Resists breakdown and thickening under high-temperature conditions.
    • Corrosion & Rust Protection: Guards ferrous and non-ferrous metals against corrosion in humid or wet environments.
    • Good Thermal Stability: Maintains performance at elevated operating temperatures.
    • Smooth Gear Shifting: Optimized friction properties provide reliable performance in synchronized manual transmissions.
Performance Standards
  • Gear systems in vehicles and equipment that require API GL-4 level oils.
  • Manual gearboxes, differentials, and transaxles where SAE 90 grade is specified.
  • Applications that require good wear control and thermal stability under moderate loads.
Key Properties

Physical Properties


Test Parameters

Test Methods

Units

Results

Appearance

Visual

NONE

Bright & Clear

Density @ 15°C

ASTM D1298

g/cm³

0.89

Kinematic Viscosity @ 40°C

ASTM D445

cSt

198

Kinematic Viscosity @ 100°C

ASTM D445

cSt

17.8

Viscosity Index

ASTM D 2270

NONE

98

Flash Point

ASTM D 92

°C

232

Pour Point

ASTM D 97

°C

-21

API Performance Level

NONE

NONE

GL-4

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