SOLAR Optima Series Automatic Manual Gear Oils GL-4 API 140

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SOLAR Optima Series Automatic Manual Gear Oils GL-4 API 140

SOLAR Optima Series Automatic Manual Gear Oils GL-4 API 140

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Description

Solar Manual Gear Oil SAE 140 GL-4 is a high-quality, heavy-duty gear lubricant formulated with refined base oils and a balanced additive system. It is designed to meet the API GL-4 performance level, offering reliable protection and lubrication for moderate-to-high load gear systems, including manual transmissions and non-hypoid axles. This oil ensures smooth gear shifting, excellent thermal stability, and long-term protection against wear, rust, and corrosion.

Available API

140 Applications

Manual transmissions, transaxles, and steering gear systems requiring API GL-4 oil.
Light and heavy-duty commercial vehicles, off-road equipment, agricultural machinery.
Gear units operating under moderate pressure and sliding speed.

Features & Benefits

- Moderate EP Protection: Ideal for manual gearboxes and axles that require GL-4 performance with excellent wear resistance.
- Smooth Gear Operation: Reduces friction and facilitates easy gear shifting, even under high temperatures.
- Excellent Oxidation Stability: Maintains performance and resists sludge formation over extended service intervals.
- Rust & Corrosion Protection: Protects metal surfaces in the presence of moisture and during standstill conditions.
- Anti-Foaming Properties: Prevents foaming to maintain a consistent lubricating film.

Performance Standards

Manual gearboxes, transfer cases, and axles where API GL-4 and SAE 140 viscosity is specified.
Commercial trucks, buses, construction equipment, and agricultural vehicles.
Environments where high film strength and thermal stability are critical.

Key Properties

Physical Properties
Test Parameters	Test Methods	Units	Results
Appearance	Visual	NONE	Bright & Clear
Density @ 15°C	ASTM D1298	g/cm³	0.905
Kinematic Viscosity @ 40°C	ASTM D 445	cSt	420 – 480
Kinematic Viscosity @ 100°C	ASTM D 445	cSt	27 – 32
Viscosity Index	ASTM D 2270	NONE	98
Flash Point (COC)	ASTM D 92	°C	240
Pour Point	ASTM D 97	°C	-12
API Performance Level	NONE	NONE	GL-4