Full Synthetic SAE 85W-140 Heavy Duty Gear Lubricant

Product Overview

Full Synthetic SAE 85W-140 Heavy Duty Gear Lubricant is a premium industrial lubricant designed for extreme pressure (EP) conditions in automotive, manufacturing, marine, and agricultural equipment. Formulated with advanced synthetic basestocks, this gear oil delivers exceptional load-carrying capacity and thermal stability, ensuring reliable operation in high-stress environments.

This heavy-duty formulation meets or exceeds API GL-5 performance requirements and MIL-PRF-2105E specifications. It provides robust protection against gear wear, pitting, and thermal degradation while maintaining film strength under shock-loading conditions. With a high flash point (~200°C) and excellent oxidation resistance, SAE 85W-140 minimizes sludge formation and extends service intervals in differentials, manual transmissions, and enclosed industrial gear drives.

Key Properties

• Grade: SAE 85W-140
• Appearance: Clear to amber liquid
• Flash Point: 200°C (392°F)
• Density (25°C): 0.885 g/mL
• Specific Gravity (20°C): 0.885–0.89
• Odor: Mild petroleum
• Solubility: Insoluble in water

Common Applications

• Heavy-Duty Automotive: Differentials, axles, and final drives in trucks and buses requiring API GL-5 protection.
• Industrial Gear Systems: Enclosed gearboxes, conveyors, and agitators operating under heavy loads and high temperatures.
• Marine Applications: Stern drives and marine gearboxes requiring water resistance and shear stability.
• Construction & Agriculture: Earth-moving equipment and farm machinery subject to shock loading and harsh environments.

Safety Precautions

Handle with appropriate personal protective equipment (PPE), including chemical-resistant gloves and safety glasses. Ensure adequate ventilation during use. Store in a cool, dry place away from strong oxidizers and direct sunlight. Keep containers tightly sealed to prevent contamination.

This product is a combustible liquid (Flash Point > 93°C). In case of skin contact, wash thoroughly with soap and water. If swallowed, do not induce vomiting; seek immediate medical attention. Refer to the Safety Data Sheet (SDS) for detailed handling, spill response, and disposal instructions.

Benefits

• Extreme Pressure Protection: Reduces wear and pitting in high-load gears.
• Thermal Durability: Resists breakdown and varnish formation at elevated temperatures.
• Shear Stability: Maintains viscosity and film thickness under severe operating conditions.
• Broad Compatibility: Suitable for a wide range of seal materials and gear housing metals.

Related Products

• Full Synthetic SAE 75W-90 Heavy Duty Gear Lubricant