Explore our elite industrial and automotive lubricants, formulated to deliver maximum friction protection and viscosity control.
Founded in 2009 in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. has established itself as a cornerstone in the global high-performance lubricants sector. As a national high-tech enterprise, we integrate research and development, smart production, and strategic brand management. We are dedicated to delivering precision-formulated products that meet the dynamic shifting demands of automotive manual transmissions and high-stress industrial machinery.
Under our proprietary brand "Century Longhai" and through our strategic international partnership with the British "A Ba" series, our portfolio spans diesel and gasoline engine oils, specialized manual gearbox additives, heavy-duty gear oils, anti-wear hydraulic solutions, and synthetic lubricants. Engineered to withstand high thermal strain and severe boundary friction conditions, our products are backed by PICC China People's Insurance Company, guaranteeing quality assurance and ultimate operational peace of mind.
Understanding the tribological developments that prevent micropitting, wear, and shifting noise in manual powertrains.
Modern manual transmissions operate under high torque density and extreme load configurations. Formulating the best manual gearbox additives requires a precise ratio of sulfur-phosphorus EP chemistries. Under boundary lubrication states, these active agents form a sacrificial tribofilm. This prevents metal-to-metal contact, gear scoring, and micropitting, without causing corrosive wear on yellow metals.
Unlike automatic transmissions, manual gearboxes rely on synchronizers constructed from brass, bronze, carbon, or molybdenum linings to match speeds during shifts. Our formulation tech ensures a stable dynamic-to-static friction coefficient over wide temperature ranges. This prevents synchromesh slippage and simplifies gear engagement, solving common issues such as hard shifting and transmission noise.
Future automotive trends focus on energy conservation, pushing manual transmission fluids (MTFs) toward lower viscosities (e.g., 75W, 70W grades). Shandong Longhai’s R&D integrates advanced Shear Stable Viscosity Index Improvers (VII). This maintains the critical oil film thickness under high shear stress, reducing internal churning losses while protecting bearing assemblies.
Our research pipeline focuses on ashless phosphorus-nitrogen technologies, organic friction modifiers (OFMs), and eco-friendly nano-additives. These minimize carbon deposits and oil aging, helping OEMs design maintenance-free, fill-for-life gear systems.
Tailored chemical additives and lubrication strategies designed to lower Total Cost of Ownership (TCO) and maximize uptime.
For long-haul trucking and shipping fleets, gear system failure directly results in costly operational downtime. By combining our premium heavy-duty gear oils with targeted gearbox additives, operators can extend oil drain intervals (ODI) from 50,000 km up to 150,000 km. The formulation improves oxidation resistance and controls thermal breakdown, protecting internal differential and transmission gears under heavy loads.
Heavy machinery operates in dusty, damp, and high-load environments. Our manual gearbox additives use active surface surfactants and rust inhibitors to repel water contamination. This keeps gearbox components free from corrosion even during prolonged shut-downs. Improved shear stability maintains steady shifting pressure in manual and dual-clutch off-highway applications.
How Shandong Longhai leverages advanced automation and large-scale manufacturing to secure global procurement.
Our production facilities utilize automatic metering and blending systems to ensure a filling precision of 1‰ to 2‰. This accuracy ensures that every batch matches the laboratory-certified chemical specifications.
Spanning 131 acres with an annual capacity of 200,000 tons, our facility easily scales to accommodate high-volume global procurement orders. We also support flexible, small-batch test runs for custom additive formulations.
With structured warehousing, proximity to shipping ports, and automated inventory systems, we guarantee fast lead times, reliable packaging, and comprehensive global logistic safety.
We offer bespoke formulation development and full brand customization services, backed by certified labs.
Fully synthetic and semi-synthetic lubricant formulations tailored to vehicle/equipment requirements, climatic conditions or market positioning to meet international standards such as API/ACEA.
Supports small-scale trial production to large-scale production, covering engine oil, transmission oil, industrial lubricants and other full categories, filling specifications are flexible and optional.
Certified by ISO 9001, IATF 16949, etc., provide authoritative third-party test reports to ensure product performance and compliance.
We offer packaging design, label printing and technical documentation support to help you build a premium brand image.
Strict compliance with environmental and health systems, certified for automotive transmission performance.
The company has passed ISO-9001-2015 quality system certification, 14001 environmental management system certification, and 18001 health management system certification. Our automatic transmission formulations carry official Mercedes-Benz approvals, ensuring reliable shear stability and material compatibility under heavy workloads.
From chemical analysis to packaging design and international shipping support.
Evaluating target viscosity, wear protection levels, and target market requirements.
Selecting base oils (Group II, III, PAO) and balancing extreme pressure ratios.
Comprehensive testing (ASTM, FZG gear tests) to verify protection performance.
Blending and high-speed packaging, with a filling accuracy of 1‰-2‰.
Post-delivery support, batch verification, and regulatory compliance assistance.
Expert technical insights regarding manual gearbox additives, synchronization performance, and wholesale customization.
Browse our selection of performance lubricants, designed for extreme thermal stability and load support.
A visual tour of Shandong Longhai's packaging lines, laboratory equipment, and shipping areas.
High-volume base oil storage tanks feeding our automated blending lines.
Monitored blending systems tracking temperature, shear, and chemical homogeneity.
Our lab checks batch viscosity, density, and metal content before packaging.
Our warehouse manages domestic distribution and handles custom export shipments.
Dedicated processing building for high-pressure industrial and automotive lubricants.
Filling lines bottle engine oils and gear additives at high throughput rates.
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