In modern high-torque, heavy-load mechanical operations, gearboxes are subjected to extreme surface friction and severe shear stress. Choosing a high-performance gear oil is no longer a matter of basic machinery maintenance; it is a critical strategy to preserve capital machinery assets. High-quality alternatives designed to match and exceed the formulation standards of Lucas Oil Gear Oil provide key operational assurances: superior film strength, thermal stabilization, and total eradication of gear chatter.
As a leading developer in chemical engineering and Tribology, Shandong Longhai Lubrication Technology Development Co., Ltd. has engineered synthetic gear oils designed to endure extreme boundary lubrication states. Our heavy-duty formulations prevent metal-on-metal micro-welding in spur, helical, bevel, and worm gear sets. By incorporating specialized sulfur-phosphorus Extreme Pressure (EP) additives and high-purity synthetic base stocks, we establish a robust protective boundary that remains resilient under severe shocks and thermal fluctuations.
Established in 2009 in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. has spent over 15 years building an integrated industrial supply chain for high-performance global lubricants.
Under our self-owned brand "Century Longhai" and strategic cooperation with the British "A Ba" series, our formulations satisfy the most rigorous standards. To ensure safety and confidence in our products, our entire line is insured by PICC (People’s Insurance Company of China), providing comprehensive quality liability protection.
Our commitment to quality is verified through our compliance with international standard systems. Shandong Longhai is certified under:
We feature fully automated metering and filling lines, maintaining a volumetric precision tolerance within 1‰ to 2‰. This system increases packaging efficiency by 20% to 35%, ensuring quick and accurate delivery of high-volume wholesale shipments.
Compare the baseline specifications of our premium synthetic gear oils (designed to align with and exceed the parameters of leading products like Lucas Oil Gear Oil) across heavy-duty commercial applications.
| Performance Property | Standard Mineral Gear Oil | Longhai Premium Synthetic API GL-5 | Lucas Oil Heavy Duty Equivalent Specs | Test Method Reference |
|---|---|---|---|---|
| Kinematic Viscosity @ 100°C (cSt) | 14.0 - 15.5 | 16.5 - 18.5 | 17.0 - 19.0 | ASTM D445 |
| Viscosity Index (VI) | 95 | 145 | 150 | ASTM D2270 |
| Pour Point (°C) | -15 | -40 | -38 | ASTM D97 |
| Four-Ball Wear Scar Diameter (mm) | 0.45 | 0.32 | 0.31 | ASTM D4172 |
| Copper Strip Corrosion (3h @ 121°C) | 2a | 1a (Superior Yellow Metal Protection) | 1b | ASTM D130 |
| Timken OK Load (lbs) | 45 | 75+ | 75+ | ASTM D2782 |
From mining operations in dry environments to offshore marine systems, our gear oils are engineered for reliable service across diverse operating conditions.
Our gear oils protect planetary gear drives and planetary gearboxes in large mining trucks, excavators, and stone crushers. They cushion heavy gear trains against impact loads and high-friction contact.
Engineered for high-altitude wind turbines, our synthetic fluids maintain fluid mobility in freezing winters and resist foaming under continuous high shear speeds in hot summers.
Formulated with demulsification properties that separate water from the oil layer, protecting shipboard gear units, winches, and thrusters from rust and cavitation wear.
Our ongoing R&D efforts focus on reducing friction and supporting eco-friendly operations, paving the way for next-generation industrial lubricants.
Shandong Longhai allocates over 5% of its annual revenues to research and development. Partnering with top domestic petrochemical labs and international technical institutes, our research is focused on three main pillars:
Located in Zibo, Shandong—a key chemical production hub—we offer stable supply and competitive manufacturing for global wholesale partners.
Our facility provides several structural advantages for international distributors and bulk buyers:
We support custom formulations, private labeling, and regional certification services to help you scale your brand globally.
Determine target parameters, application environment, and viscosity requirements.
Blend custom base oils with select additive packages in our lab.
Run extreme pressure, shear stability, and corrosion tests under load.
Package into custom drums, containers, or cans with customized labeling.
Manage customs clearances and export shipping to global markets.
A look inside our manufacturing environments, laboratories, and testing centers.
Longhai