GL-5 Gear Oil is a premium-grade, heavy-duty gear lubricant formulated with advanced sulfur–phosphorus Extreme Pressure (EP) additives to deliver superior performance in hypoid gear systems and high-load drivetrain components. Designed to meet strict API GL-5 requirements, this lubricant provides exceptional resistance against scuffing, micro-pitting, gear wear, and thermal degradation, making it ideal for severe operating conditions.

GL-5 Gear Oil is engineered to protect gears operating under extreme torque, shock loading, sliding contact, and elevated temperatures. Its formulation includes robust anti-wear agents, corrosion inhibitors, and anti-foam additives that ensure consistent lubrication, extended component life, and stable performance across a wide range of environmental and mechanical conditions.

Key Product Features

1. Enhanced Extreme Pressure (EP) Protection

High-strength sulfur–phosphorus EP chemistry forms a resilient protective layer on metal surfaces, preventing wear under heavy load, high torque, and sliding contact common in hypoid gears.

2. Superior High-Temperature Stability

GL-5 Gear Oil resists oxidation, thermal breakdown, and viscosity loss even during extended operation at elevated temperatures—ensuring long service life.

3. Protection Against Corrosion and Rust

Advanced inhibitor packages protect ferrous components from oxidation, moisture contamination, and corrosive attack in demanding environments.

4. Anti-Foam and Rapid Air Release

Special anti-foam agents ensure stable lubrication by minimizing air entrapment, preventing loss of film strength and reducing the risk of aeration-related damage.

5. High Load-Carrying Capability

Well-suited for gear systems exposed to severe shock loads, making it a reliable lubricant for heavy-duty vehicles, off-road equipment, and industrial machinery.

Primary Applications of GL-5 Gear Oil

GL-5 Gear Oil is recommended for:

1. Automotive and Commercial Differentials

Especially hypoid differentials that operate under severe service conditions, including high torque and heavy loads.

2. Final Drive and Axle Assemblies

Ensures reliable film strength and reduced friction in final drives requiring extreme pressure resistance.

3. Off-Road, Construction, and Mining Equipment

Ideal for heavy machinery subject to shock loading, abrasive environments, and continuous high-stress operation.

4. Industrial Gear Systems (Where GL-5 Is Specified)

Some enclosed gearboxes operating under severe sliding contact may require GL-5-level EP protection.

5. Agricultural Machinery

Tractors, harvesters, and utility vehicles with high-load drivetrain requirements benefit from GL-5’s strong EP characteristics.

Performance Advantages

• Outstanding gear protection under extreme pressure
• Exceptional resistance to scuffing, pitting, and micropitting
• Maintains film strength under shock loads
• Long lubricant life due to superior oxidation stability
• Protects against rust and corrosion even in humid or wet environments
• Reliable performance over a wide temperature range
• Reduces operating noise and improves drivetrain efficiency

Typical Technical Specifications (Example for 80W-90 Grade)

Exact values vary by supplier and viscosity grade (75W-90, 80W-90, 85W-140).

Compatibility Notes

• Not recommended for manual transmissions with bronze/brass synchronizers
  (GL-5’s aggressive EP chemistry may attack yellow metals.)
• Compatible with typical automotive seals (NBR, ACM, FKM) used in axle and differential systems.
• Safe for use where manufacturer explicitly specifies API GL-5.

Storage and Handling Recommendations

• Store in closed, dry, cool areas away from direct sunlight
• Avoid contamination with water or dust
• Use clean dispensing equipment to preserve lubricant integrity
• Follow proper disposal procedures for used gear oil

Conclusion

GL-5 Gear Oil is a high-strength, heavy-duty gear lubricant engineered for hypoid gears, differentials, and drivetrains operating under severe loads and extreme pressure conditions. Its robust EP package, thermal stability, and load-handling performance make it an essential choice for automotive, industrial, agricultural, and off-highway applications that demand superior protection and durability.