Engineered for extreme operating pressures, thermal thresholds, and harsh oceanic environments.
Established in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. has evolved into a premier high-tech enterprise integrating R&D, chemical synthesis, production, and international logistics. Over 15 years, we have built a complete industrial supply chain tailored for the demanding lubrication specifications of heavy transportation, deep-sea marine exploration, and high-load industrial machinery.
Our proprietary brand, "Century Longhai", alongside our strategic international brand, the British "A Ba" series, represent the pinnacle of tribological research. Insured by the PICC (People's Insurance Company of China), our high-tier synthetics ensure maximum reliability and mitigate equipment failure liability across thousands of operating environments worldwide.
Global commerce demands zero unplanned downtime. Our products address the intersection of energy efficiency and extreme physical shear forces.
Offshore exploration machinery and deep-sea vessels function under persistent atmospheric salinity, severe humidity, and wide thermal variations. Standard lubricants fail rapidly under water contamination. Our synthetic gear and hydraulic formulations integrate proprietary water-demulsibility additives to sustain fluid film strength and inhibit oxidation under constant operational stress.
Modern internal combustion engines and high-pressure compressors run hotter to optimize thermodynamic efficiency. This induces accelerated fluid degradation, varnish, and carbon deposits. Our CJ-4, CK-4, and fully synthetic motor oils leverage premium Group III/IV base stocks, sustaining structural viscosity stability at sustained temperatures exceeding 150°C.
Marine and terrestrial emission controls mandate advanced exhaust aftertreatment devices, including Diesel Particulate Filters (DPF) and Selective Catalytic Reduction (SCR). High-ash lubricants rapidly poison these systems. Longhai's Low-SAPS (Sulfated Ash, Phosphorus, and Sulfur) formulation technology ensures system longevity while lowering lifecycle fuel consumption.
Integrating cutting-edge automation to assure physical product consistency and high volume capabilities.
Longhai Technology operates state-of-the-art blending reactors utilizing computerized DCS control systems. This ensures base stocks and additive packages are homogeneous and blended within tight chemical tolerances. Our automated filling lines utilize a high-precision mass-flow metering mechanism, achieving filling precision down to 1‰-2‰.
By automating container sterilization, precise fluid injection, and seal integrity testing, we have increased manufacturing throughput by 20% to 35% compared to traditional semi-automated architectures. This direct production advantage guarantees short lead times and stable batch consistency for high-volume wholesale export orders.
We provide full-service manufacturing, covering custom additive design, bulk production, and compliance packaging.
We develop high-tier synthetic and semi-synthetic lubricant recipes tailored to specific operating speeds, mechanical pressures, climate profiles, or regulatory regimes. Our engineering team modifies friction modifiers, detergent levels, anti-foaming agents, and viscosity modifiers to align finished lubricants with API, ACEA, and specific OEM builder guidelines.
Our production processes follow global management protocols to ensure zero defects.
Our facility operates in accordance with ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health and Safety). These standards govern our raw material tracking, blending, and sample retention.
Our automatic transmission and engine fluids have secured formal OEM approvals, including Mercedes-Benz certification. This proves our formulations perform under demanding shear conditions required by high-performance vehicle builders.
To assure commercial peace of mind, all Longhai export products are fully underwritten by the People's Insurance Company of China (PICC). This liability insurance reflects our product reliability and technical design.
A structured approach ensuring client requirements align with our formulation, chemical production, and global delivery systems.
Assessing physical tolerances, OEM requirements, and operational environment conditions.
Adjusting viscosity indices, anti-wear profiles, and polymer choices in our laboratory.
Verifying shear stability, cold-cranking performance, and corrosion prevention capabilities.
Utilizing high-speed blending and automatic filling systems for packaging.
Providing multi-modal delivery options with comprehensive customs clearance documentation.
Optimizing equipment lifespan under extreme mechanical pressures, high thermal zones, and challenging environments.
Our heavy-duty diesel engine fluids (API CK-4/CJ-4) and transmission oils are used in cargo carriers and deep-sea support vessels, maintaining engine cleanliness and minimizing piston ring wear under variable fuel quality profiles.
Longhai industrial gear oils (L-CKC/L-CKD) protect heavy-load gearboxes under constant mechanical shock, preventing gear micropitting and reducing oxidation-driven viscosity increase.
Our synthetic compressor and refrigeration oils minimize oil carryover, keeping evaporator coils clean and maintaining heat-exchange efficiency at low temperatures.
The industrial sector faces structural shifts toward decarbonization and reduced environmental impact. In response, Longhai’s R&D team is developing next-generation bio-based lubricants with high biodegradability and low toxicity, designed to degrade naturally in marine environments.
Our technology roadmap prioritizes extremely low-viscosity formulations that reduce friction coefficient losses in drivetrains while retaining high shear stability. By investing over 5% of our annual revenue into joint university research, we ensure our global partners access advanced chemical formulations that support both regulatory compliance and long-term sustainability goals.
Answering critical engineering and distribution questions for procurement teams and plant operators.
API CK-4 oils are designed to improve oxidation resistance, aeration control, and shear stability compared to older CJ-4 specs. CK-4 fluids maintain viscosity under high operating temperatures, reducing fuel friction losses. For older engines or specific emissions setups, CJ-4 remains a reliable option, but CK-4 offers better oxidation protection and viscosity retention for modern powerplants.
We formulate our marine and anti-wear hydraulic fluids with select demulsifiers. These chemicals destabilize water-in-oil emulsions, encouraging rapid water separation. This ensures water settles out of the oil quickly, where it can be drained, preserving film strength and preventing rust inside close-tolerance hydraulic valves.
We use a computerized Distributed Control System (DCS) to monitor additive dosing and temperature variables during blending. Every batch undergoes ICP elemental spectroscopy, kinematic viscosity checks, and ASTM pour/flash point tests. We also retain batch reference samples for two years to ensure full quality traceability.
Our L-CKD industrial gear oils use sulfur-phosphorus EP chemistry. Under localized high temperatures and mechanical shock loads, these additives react with metal surfaces to form a sacrificial protective layer. This prevents metal-to-metal contact, micro-pitting, and premature gear face wear.
Ensuring stable performance and structural integrity under high pressure and thermal loads.
Longhai