Engineered for ultimate friction modification, extreme pressure tolerance, and maximum gear wear protection in extreme conditions.
An in-depth analysis of tribological demands, shear stability, and additive technologies for modern vehicle axles.
Differential gear assemblies operate under some of the most punishing mechanical stress parameters in the automotive and industrial machinery sectors. Unlike typical gear transmissions, hypoid gear alignments in differentials experience a combination of severe rolling and sliding contact under high torque loads. This complex interaction creates extreme frictional heat and shear stress, requiring differential (diff) oil additives to prevent metal-to-metal contact, micro-pitting, scoring, and eventual catastrophic failure.
Modern differentials are increasingly compact to reduce vehicle weight, yet they are subjected to higher power inputs from forced-induction combustion engines and high-torque electric drive units (EDUs). The primary mission of a high-performance differential oil additive package is to reinforce the boundary lubrication film under extreme pressure (EP) conditions. Key chemical components, including sulfur-phosphorus anti-wear agents, organic friction modifiers, and polymeric shear-stable viscosity index improvers, must perform dynamically across wide thermal envelopes.
Limited-slip differentials (LSD) require highly specialized friction modifiers to manage the engagement of multi-plate clutch packs. Without appropriate additive chemistry, LSD clutches can experience stick-slip vibration, leading to high-frequency shudder, noise, and accelerated friction plate wear. By implementing precise concentrations of surface-active friction modifiers, the oil film characteristics are tailored to ensure smooth dynamic transitions between static locking and sliding slip states. This maximizes vehicle handling predictability, reduces heat dissipation demands, and extends component longevity.
Shandong Longhai Lubrication Technology Development Co., Ltd. was established in 2009 and is headquartered in Zibo, Shandong. It is a high-tech enterprise integrating R&D, production and sales. The company has been deeply involved in the lubricant industry for more than 15 years, has built a complete industrial chain system, and is committed to providing high-quality lubrication solutions for the global industrial and transportation fields.
As a reliable lubricant manufacturer in the industry, Longhai Technology owns its own brand "Century Longhai" and the international strategic cooperation brand British "A Ba" series of products. Our product lines encompass diesel engine oil, gasoline engine oil, gear oil, hydraulic transmission oil, anti-wear hydraulic oil, special engine oil for engineering machinery, special oil for natural gas, full synthetic oil, automotive urea solution, antifreeze, special engine oil for motorcycles, industrial oil, automatic transmission oil, and many other lubricant varieties. The brand is fully insured by PICC China People's Insurance Company, providing verified security and reliability.
Leveraging scale, premium chemical infrastructure, and technological innovation to supply global industrial markets.
Sourcing lubricants and additive packages from Shandong Longhai offers global enterprises unique supply chain benefits. Situated in Zibo, Shandong—a major petrochemical and industrial manufacturing hub in Northern China—our facility integrates advanced raw material pipelines, bulk storage capacities, and highly efficient transport networks. This operational setup minimizes supply disruptions and maintains highly competitive pricing for volume procurements.
Our infrastructure enables rapid order scaling, from pilot testing batches to full maritime container shipments. Operating with fully automated processing systems, we eliminate batch-to-batch inconsistencies, ensuring that every ton of differential oil or additive package conforms perfectly to the chemical signatures agreed upon in product specifications.
Innovation is the core engine at Shandong Longhai Lubrication Technology. We dedicate over 5% of our annual revenue directly to advanced lubricant R&D. By maintaining strategic relationships with major universities and research centers, we continually innovate our formulations to align with evolving international tribological expectations.
Our production base is equipped with modern, fully automatic blending and packaging lines that utilize precise dosing principles. This guarantees a filling accuracy threshold of 1‰-2‰. Along with high precision, our high-speed automated packaging lines achieve a 20% to 35% efficiency boost over manual methods. This setup ensures that we can handle high-volume bulk orders rapidly while maintaining consistent, standard-compliant product quality.
Validating performance and safety benchmarks to meet the demands of regulated international markets.
In the global chemical and lubricant markets, compliance is crucial. Shandong Longhai is certified under ISO 9001-2015 (Quality Management System), ISO 14001 (Environmental Management System), and ISO 18001 / ISO 45001 (Occupational Health & Safety Management System). Our automatic transmission lubricants have also achieved prestigious Mercedes-Benz approvals, demonstrating our compliance with strict OEM standards.
For chemical exports, we provide comprehensive technical documentation, including safety data sheets (SDS) aligned with GHS standards, Technical Data Sheets (TDS), and certification profiles that assist international customs clearances. Whether complying with REACH regulations in Europe, EPA rules in North America, or local standards in Southeast Asia, our compliance division works closely with procurement teams to guarantee smooth transit and complete legal compliance.
Developing custom formulations, container packaging designs, and offering reliable supply chain logistics for private labels worldwide.
We formulate custom fully synthetic and semi-synthetic lubricants tailored to specific vehicle setups, unique operating climates, and targeted price points, meeting global performance standards including API, ACEA, and specific OEM approvals.
Our production lines accommodate both small-scale trial batches and large-scale bulk orders. We offer a full range of packaging volumes with customization options to meet our clients' brand guidelines.
All customized blends are tested in our certified laboratories. We provide formal third-party lab verification reports to confirm product performance, shear resistance, and compliance safety metrics.
We assist our partners with visual label design, structural packaging layouts, and technical data sheets (TDS) to ensure a professional and premium market presentation.
Demand Analysis
Formula Development
Sample Testing
Production Delivery
After-Sales Support
Adapting chemical compounds to withstand diverse geographical, climatic, and industrial conditions.
Differentials operating in Northern Europe, Canada, and Northern China experience cold start-up conditions that can restrict lubricant flow. Our additives use premium pour-point depressants and low-temperature fluidity modifiers to ensure rapid oil distribution and prevent dry wear during startup.
In tropical mining sites and high-temperature logistics corridors, high ambient heat accelerates thermal degradation. We design our additives to maintain viscosity stability and resist oxidation, preventing the formation of sludge and acidic compounds under continuous high heat.
Heavy duty construction vehicles, mining trucks, and agricultural tractors experience high shock loads. Our high-performance differential oil additives use advanced sulfur-phosphorus EP technology to form a robust tribochemical barrier that prevents gear welding and extreme wear.
Adapting technology to meet emerging demands for sustainability, low viscosity, and drivetrain electrification.
The global drivetrain industry is moving rapidly toward higher efficiency and lower emissions, which changes the requirements for lubrication chemistry. The main development trends in gear oil and differential additive technologies include:
Inside our production facility and scientific development labs in Zibo, Shandong.
Technical answers to common questions about differential oil additive chemistry, compliance, sourcing, and OEM capabilities.
Our lubricants and additives are tested and field-proven under challenging real-world operating conditions.
Explore our industrial gear and drivetrain oils designed for heavy-duty protection and consistent performance.
Longhai
