Advanced formulated engine, gear, and hydraulic fluids meeting global maritime standards.
The global maritime industry is experiencing a profound transition driven by international environmental mandates and the push toward decarbonization. As the International Maritime Organization (IMO) enforces stricter controls under MARPOL Annex VI—notably the global 0.50% sulfur limit and the 0.10% sulfur limit within Emission Control Areas (ECAs)—vessel operators must navigate the complex chemical balances of fuel and lubricants. This regulatory pressure demands not only clean-burning fuels but also next-generation lubricating oils that can withstand the unique combustion profiles of low-sulfur options like Very Low Sulfur Fuel Oil (VLSFO), Ultra-Low Sulfur Fuel Oil (ULSFO), and traditional Marine Diesel Oil (MDO) blends.
As a leading marine diesel oil supplier and lubrication service partner, Shandong Longhai Lubrication Technology Development Co., Ltd. provides specialized formulations that counteract the combustion challenges associated with low-sulfur fuels. Without correct lubrication, lower-sulfur fuels often produce higher thermal stresses or inadequate acid neutralization capacity (TBN - Total Base Number) in medium- and high-speed marine propulsion engines. Our formulations prevent engine deposits, neutralize residual acids, and secure piston cleanliness, assuring continuous operations across international trade routes.
Modern marine diesel engines demand robust oil characteristics to counteract wear mechanisms under massive pressure and high thermal loads. Whether applied in auxiliary generator units, propulsion drivetrains, or deep-sea main gear systems, high-quality base oils combined with active additive packages are mandatory. Base oils must offer excellent thermal-oxidative stability to resist viscosity thickening, while additive components need to maintain a tenacious boundary lubrication film under sliding friction.
Longhai Technology's portfolio spans synthetic blends and specialized anti-wear additives designed to optimize the mechanical interface of piston rings and cylinder liners. Our engine lubricants feature outstanding dispersancy, ensuring carbonaceous particulates are held in suspension to prevent sludge buildup. Additionally, our specialized gear and hydraulic systems products, such as anti-wear hydraulic oil and heavy-duty gear oil, exhibit supreme shear stability, preventing viscosity degradation in high-load hydraulic systems, deck machinery, and power transmission packages.
A high-tech pioneer with 15+ years of engineering excellence and industrial capacity.
Established in 2009 in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. has developed into a premier domestic and international manufacturer of high-grade lubricants. With a dedicated production base extending over 131 acres and an annual production capacity reaching 200,000 tons, the enterprise leverages fully automated blending systems and precision filling lines. Longhai Technology represents premium brand assets including "Century Longhai" and the British "A Ba" strategic series, catering to heavy-duty maritime, transportation, and industrial machinery markets globally.
Continuous investment in sustainable formulation technologies and molecular modeling.
At Longhai Technology, innovation represents the core driver of our growth, with annual R&D investment consistently exceeding 5% of total revenue. By maintaining collaborative engineering labs with esteemed universities and research centers, we continually advance the boundaries of marine lubrication. Our technological development focuses on three primary pillars designed to match the evolving needs of modern shipowners and industrial operations.
Developing low sulfated ash, phosphorus, and sulfur additives to protect modern exhaust gas aftertreatment systems (SCR/DPF) and lower PM emissions.
Engineering Environmentally Acceptable Lubricants (EAL) using synthetic esters for thrusters, stabilizers, and stern tube interfaces prone to water contact.
Synthesizing next-gen organic friction modifiers that establish nano-scale tribofilms on engine components to maximize fuel economy by up to 2.5%.
Advanced production facilities delivering bespoke lubricants for domestic and international distributors.
Longhai Technology features cutting-edge automated blending lines utilizing mass-flow metering principles, ensuring extreme blending precision within a 1‰-2‰ margin. This level of control allows us to support custom requests from small trial batches to massive bulk vessel loads. We specialize in compounding custom lubricants adjusted for localized ambient temperatures, specific equipment configurations, and demanding operating environments.
Our OEM/ODM services cover formula development, laboratory testing, regulatory compliance validation, packaging design, and container logistics. Each formulation is thoroughly validated within our physical-chemical analytical center using international standards (ASTM, ISO) to verify viscosity index, pour point, flash point, copper strip corrosion resistance, and demulsibility properties.
Fully compliant with international quality, environmental, and occupational safety frameworks.
Longhai Technology operates under strict quality guidelines to ensure every drop of lubricant performs flawlessly under extreme ocean and factory conditions. The company has successfully attained ISO 9001:2015 Quality Management System Certification, ISO 14001 Environmental Management System Certification, and ISO 45001 (formerly 18001) Occupational Health and Safety Management System Certification.
Furthermore, our automatic transmission lubricants carry the prestigious Mercedes-Benz OEM approval. The People's Insurance Company of China (PICC) provides quality liability underwriting for our products, giving global purchasers complete confidence in the security and integrity of their supply chain.
A step-by-step technical pathway to ensure premium product integration and supply stability.
Reviewing engine specifications, fuel sulfur content, and system operational conditions.
Adjusting Base oils, additives, viscosity indexes, and TBN values to ensure optimal results.
Subjecting samples to extensive laboratory and pilot-scale wear tests under simulated heat.
Automated high-speed blending and filling with precise metering and packaging.
Analyzing used oils, tracking wear particles, and advising on optimization and drain intervals.
How Longhai lubricants secure heavy machinery and shipping fleets in real-world scenarios.
Our premium anti-wear hydraulic oil safeguards dock gantry crane systems operating under continuous load, maintaining stable hydraulic pressures in coastal, high-humidity environments.
Using high-TBN marine diesel engine oils protects cylinder liners from acid-induced corrosion when switching between low-sulfur heavy oils and medium-viscosity marine gas oils.
Heavy-duty gear oil reduces high friction loads in onboard winch drives, worm gears, and heavy factory reduction gearboxes, preventing pitting and micro-cracking.
Addressing core technical questions regarding marine lubrication, compliance, and formulation science.
Switching to low-sulfur fuels such as VLSFO or marine gas oil reduces sulfur oxide emissions but alters combustion dynamics. Lower sulfur in fuel results in fewer acidic combustion byproducts, meaning traditional high-TBN cylinder lubricants (e.g., 70-100 TBN) can lead to over-neutralization. This causes hard, calcium carbonate-based deposit buildups on piston crowns, leading to scuffing and cylinder wear. Modern configurations require lower TBN lubricants (typically 40 TBN or below) paired with high detergency and dispersancy properties to maintain ring pack cleanliness and manage catalytic fines (cat fines).
TBN measures a lubricant's alkaline reserve, indicating its capacity to neutralize corrosive acids produced during fuel combustion. If high-sulfur residual fuels are burned, high-TBN lubricant is required to neutralize sulfuric acid and prevent liner corrosion. If low-sulfur distillates are used, a lower TBN lubricant is selected to avoid deposit formation. TBN retention is critical; the lubricant must maintain its neutralizing power throughout the drain interval to protect the engine components.
Deck machinery, including windlasses, winches, and steering gear, operates under high pressure and variable speeds in marine environments. These systems are prone to salt water contamination and temperature fluctuations. Longhai's anti-wear hydraulic oil features specialized zinc-based (ZDDP) and zinc-free additives that form a protective film under high shear loads. Excellent demulsibility allows the oil to separate quickly from water, preventing corrosion, valve sticking, and cavitation.
Synthetic lubricants (PAO, esters, and PAG) offer superior viscosity-temperature relationships (viscosity index), high thermal-oxidative stability, and lower pour points compared to mineral base oils. In marine environments, synthetics maintain their lubricating film under high temperatures and resist oxidation in high-pressure air compressors, turbochargers, and thruster gearboxes. They reduce friction, lower operating temperatures, extend drain intervals, and minimize oil consumption.
Our production facilities utilize automated mass-flow metering systems and PLC-controlled blending vessels. Raw base oils and additive components are precisely weighed and blended at monitored temperatures to ensure complete homogenization. Each batch is sampled and tested in our laboratory using ASTM standards for viscosity, TBN, water content, and element analysis (ICP spectrometer) before packaging. This ensures consistent quality across all production runs.
Yes. Longhai lubricants are formulated to meet or exceed international standards (API, ACEA, ISO) and specific OEM performance requirements. Our automatic transmission lubricants carry Mercedes-Benz approval, and our marine engine oils meet critical builder specifications (MAN Energy Solutions, Wärtsilä, Caterpillar). Using equivalent or higher-specification lubricants from an ISO 9001 certified manufacturer like Longhai does not affect warranty terms.
Reliable lubricants designed for gears, turbines, and diverse motor vehicle applications.
Proven reliability verified by global customers, maritime associations, and state industrial programs.
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