Explore our flagship heavy-duty automotive engine oils, anti-wear hydraulic fluids, and industrial compressor lubricants manufactured in our state-of-the-art facility.
Critical Engineering and Quality Thresholds for Industrial Gear Systems
Modern industrial machinery operates under increasingly severe conditions: higher speeds, wider temperature fluctuations, smaller oil reservoirs, and higher torque densities. As gearboxes are downsized to increase efficiency, the lubricants that protect them are subjected to unprecedented shear stress and thermal loads.
As a leading China gear oil lubricant factory, we understand that modern formulation chemistry must go beyond simple lubrication. High-quality gear oil must act as a primary heat transfer medium, seal against contaminants, suppress foaming, and prevent micropitting—a surface fatigue phenomenon that can cause catastrophic gear failure. Under Google's E-E-A-T guidelines, our technical engineers compile strict testing records verifying that our gear lubricants provide robust film-thickness retention under extreme pressure (EP) boundary lubrication regimes, satisfying API GL-5, DIN 51517 Part 3 (CLP), and AGMA 9005-F16 specifications.
15+ Years of Dedicated Blending Expertise & Brand Leadership
Established in 2009 and headquartered in the petrochemical hub of Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a high-tech enterprise integrating R&D, production, and global sales. For over 15 years, we have built a complete, integrated industrial chain system dedicated to providing premium lubrication solutions for global industrial and automotive markets.
We manage our proprietary brand "Century Longhai" alongside our international strategic partner brand, the British "A Ba" series. Our expansive product portfolio covers heavy-duty diesel engine oils, high-performance gasoline motor fluids, extreme pressure gear oils, anti-wear hydraulic transmission fluids, specialized engineering machinery oils, automatic transmission fluids (ATF), eco-friendly urea solutions, and premium antifreeze. To ensure absolute financial and operational security for our buyers, all Longhai products are fully insured under a comprehensive product quality liability policy by the People's Insurance Company of China (PICC).
Intelligent, Large-Scale Petrochemical Processing Facilities in Zibo, Shandong
Innovation is the engine of our business. Longhai consistently reinvests over 5% of its annual revenues into our dedicated laboratory, partnering with leading engineering universities and scientific research institutes to pioneer synthetic base oils, shear-stable polymers, and novel anti-wear additives.
Spanning 131 acres, our advanced production base yields an annual capacity of 200,000 metric tons. This ensures that whether you require high-mix small-batch custom formulations or high-volume global private label contracts, we maintain rapid, stable production schedules.
Equipped with fully automated blending technology and metering filling lines, we guarantee a volumetric precision of 1‰ to 2‰. Our production optimization protocols have boosted filling speed by 20% to 35%, ensuring faster lead times and immaculate quality control.
Cost Efficiencies, Direct Sourcing, and Unrestricted Global Logistics
Procuring gear oils and lubricants from Shandong Longhai provides global buyers with a competitive trifecta: raw material security, logistical ease, and economies of scale.
Helping International Distributors Dominate Local Markets Safely
Expanding a private lubricant brand globally requires deep compliance expertise. Shandong Longhai provides extensive support to ensure smoothly cleared shipments and regulatory compliance:
ISO Certified Quality Systems & Internationally Recognized OEM Approvals
Quality is the lifeblood of our brand. The company operates in strict compliance with the ISO 9001:2015 quality management system, ISO 14001:2015 environmental management system, and ISO 45001:2018 occupational health and safety system. Additionally, our automated transmission fluids hold formal Mercedes-Benz approvals, demonstrating our capacity to manufacture fluids that meet strict European automotive tolerances.
From Industrial Requirements Analysis to Global Distribution Support
Target parameters, application scenarios, and branding parameters.
Blending base oil viscometrics and additive packages to OEM specifications.
Pour point, flash point, FZG stage rating, and wear scar verification.
Volumetric filling with high accuracy and customized private labels.
FOB/CIF shipments via Qingdao Port with active MSDS and customs documentation.
Engineering Optimized Lubricant Solutions for the Toughest Mechanical Environments
Specifically engineered for gear reduction units in heavy machinery like mining crushers, cement ball mills, steel rolling machinery, and harbor cranes. Our lubricants deliver exceptional thermal stability and surface protection under shock-load conditions, protecting gears against micro-scuffing.
Offshore and onshore wind power gearboxes operate under high load fluctuations and moisture exposure. Our fully synthetic polyalphaolefin (PAO) gear fluids provide robust wear resistance, water separation, and anti-foaming properties, lowering replacement cycles in hard-to-access nacelles.
For hypoid axles and manual gearboxes, extreme pressure (EP) protection is critical due to sliding gear dynamics. Our API GL-5 rated lubricants utilize advanced sulfur-phosphorus additives to prevent gear wear and score marks, maintaining clean operation and system efficiency.
Deep Insight into Our Blending Equipment, Enterprise Environment, and Testing Apparatus
Premium Grade Lubricants Engineered to Exceed International Performance Guidelines
Ultimate API SP protection designed for modern gasoline direct injection engines.
Maximum protection against low-speed pre-ignition (LSPI).
Active sludge control and wear prevention for passenger cars.
Stable lubrication under varying operational temperatures.
Born for extreme heavy-duty commercial fleets and mining machinery.
Advanced soot handling capabilities and wear protection.
Exceptional oxidation resistance and TBN retention profile.
Cost-effective, high-durability protection for logistics operations.
In-Depth Answers to Technical Inquiries from Industrial Procurement Managers & Lubrication Engineers
API GL-4 gear oils are designed for moderate gear loads and contain about half the Extreme Pressure (EP) sulfur-phosphorus additives found in API GL-5 oils. While GL-5 oils offer superior load-carrying capacity for hypoid differentials, their active sulfur compounds can chemically attack and corrode yellow metals (copper, bronze, brass) in synchronizers at operating temperatures exceeding 90°C. Longhai's engineering team utilizes advanced, thermally stable buffered sulfur-phosphorus additive packages. This prevents the chemical attack on yellow-metal components, ensuring that our dual-rated (GL-4/GL-5) lubricants deliver high EP protection without risking corrosion.
Multi-grade gear oils rely on Viscosity Index Improvers (VII) to maintain viscosity at high temperatures while allowing low-temperature flow. Standard polymethacrylate (PMA) polymers can break down under high shear forces, leading to viscosity loss and thinning oil films. Longhai uses highly shear-stable radial polymers and high-quality synthetic base oils. Our formulations undergo rigorous ASTM D5621 (sonic shear method) and DIN 51350-6 (KRL shear test) testing to verify zero permanent viscosity loss, ensuring consistent protection over extended drain intervals.
Micropitting is a type of fatigue wear that causes microscopic cracks and surface damage on gear teeth, commonly seen in planetary gearboxes. Longhai's synthetic gear oils are formulated with specific surface-active anti-wear chemistries that reduce friction at the microscopic level. Our fluids are tested according to the FVA 54/I-IV micropitting test, achieving a high load stage rating of >10. This ensures excellent micro-pitting resistance, extending the operating life of high-torque industrial gearboxes.
Every batch at our Zibo facility undergoes a multi-phase quality control protocol. First, raw base oils and additives are verified for purity before blending. After blending, samples are drawn for analysis using Inductively Coupled Plasma (ICP) spectroscopy to verify chemical levels. We also test kinematic viscosity at 40°C and 100°C (ASTM D445), flash point (ASTM D92), pour point (ASTM D97), copper corrosion (ASTM D130), and foaming characteristics (ASTM D892). A Certificate of Analysis (COA) is generated for every batch, confirming batch uniformity and tracking.
Yes, our R&D lab regularly customizes formulations to meet specific OEM specs, such as Flender (Siemens), Hansen Transmissions, David Brown, SEW-Eurodrive, and US Steel. We can adjust viscosity grades (from ISO VG 68 to 1000), incorporate tackifiers for open-gear applications, or use food-grade base stocks for processing machinery. Distributors can submit their target parameter sheets, and our chemists will develop a matching formulation.
Engineered for high thermal stability and extreme pressure environments in commercial automotive and heavy industrial gearboxes.
Visualizing Production Capacity, Quality Verification, and Global Shipping Logistics
Longhai
