Explore our top-tier selection of heavy-duty motor, diesel, gear, and hydraulic fluids manufactured to protect internal engine seals and prevent micro-leaks under high pressure.
China Longhai CH-4 Heavy-Duty Diesel Oil – Advanced Wear Protection & Engine Cleanliness Exporter, Exporters
View Specifications
China Longhai CF-4 Diesel Engine Oil – High-Temperature Cleanliness & Heavy-Duty Protection Exporter, Exporters
View Specifications
China L-CKC medium load & L-CKD Heavy Duty industrial gear oil Supplier, Service
View Specifications
China LONGHEAD SP Premium Motor Oil - The Ultimate Protection for Modern Vehicles Supplier, Exporter
View Specifications
Wholesale Longhai Premium Anti-Wear Hydraulic Oil – Superior Protection for Industrial Applications Suppliers, Service
View Specifications
Wholesale Premium SJ Grade Gasoline Engine Oil - Superior Protection and Performance Supplier, Exporter
View Specifications
Wholesale Premium SL Gasoline Engine Oils - Advanced Protection for Modern Engines Exporter, Exporters
View Specifications
Wholesale Professional solution for turbine oil - efficient lubrication protection system Exporters, Service
View SpecificationsIn the global power sports, urban mobility, and high-performance two-wheeler logistics sectors, maintaining engine hermetic integrity is critical. In markets spanning Southeast Asia, Latin America, Europe, and Africa, motorcycles are subjected to extreme duty cycles. High ambient temperatures, prolonged idling in heavy traffic, and unpaved terrains put excessive thermal and physical stress on engine seals, gaskets, and O-rings. Over time, these sealing elastomers dry out, shrink, harden, or crack, leading to oil seepage, commonly referred to in the industry as "motorcycle leaking oils."
When an engine experiences minor oil seepage, oil levels drop slowly, leading to elevated metal-on-metal friction, severe component wear, and eventual catastrophic engine failure. Modern tribology dictates that the most effective way to combat this without immediate disassembly is using seal-active additives and premium base oils. These lubricants contain precise chemical agents designed to penetrate the outer layer of elastomer gaskets, causing controlled swelling that fills micro-fissures and restores the sealing surface's elasticity.
Formulated with specific ester blends and seal conditioners that gently expand elastomer gaskets, resolving structural shrinkage without degrading the chemical makeup of the seal materials.
Maintains a stable boundary lubrication layer even under high engine operating temperatures (exceeding 150°C), minimizing internal oil pressure drops that push fluid through weakened joints.
Engineered to resist mechanical shear in integrated motorcycle gearboxes, ensuring the oil does not thin out prematurely and bypass valve guides or crankshaft seals.
Established in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a high-tech enterprise integrating R&D, production, and sales. With over 15 years of deep industry immersion, we have built a complete industrial chain system dedicated to providing premium lubrication solutions for the global industrial and transport sectors.
Our proprietary brand "Century Longhai" alongside our international strategic partner brand, the British "A Ba" series, represent a benchmark in quality. Our production base spans 131 acres, boasting an annual production capacity of 200,000 tons.
By investing over 5% of annual revenue into R&D, we continuously optimize our formula chemistry. Our state-of-the-art blending facility utilizes high-precision automated filling systems operating on the principle of volumetric metering. This ensures a filling accuracy deviation of only 1‰ to 2‰, while increasing production line throughput by 20% to 35%. This efficiency enables us to meet demanding international delivery schedules with speed and consistency.
Different operating environments present unique challenges for motorcycle engines. For instance, in dense cities where motorcycles form the backbone of express courier and food delivery fleets, engines endure constant stop-and-go cycles. These patterns lead to localized hot-spots, accelerating oil degradation and gasket wear. In agricultural and rural settings, off-road conditions and dust exposure place heavy strain on filtration and valve-stem seals. By utilizing our tailored anti-wear formulations, fleet operators achieve longer oil drain intervals and lower maintenance overheads.
The global lubricant market is undergoing a major shift. Strict environmental policies demand low-viscosity formulations to enhance fuel economy, which in turn places higher pressure on seal materials to prevent leaks. Concurrently, the rise of synthetic base stocks requires precise additive chemistries to prevent rubber shrinkage—a common side effect of pure synthetic formulations. Our ongoing partnerships with global universities allow us to stay ahead of these trends, engineering lubricants that satisfy modern emissions standards while keeping gaskets secure.
Minimizes thermal degradation and prevents premature seal shrinkage under high oil temperature fluctuations common in delivery operations.
Prevents fluid evaporation and oxidation in tropical climates, keeping seals lubricated and pliable to avoid cracking and leaks.
Provides robust film thickness and wear protection for integrated clutches and gear assemblies in high-performance and commercial utility vehicles.
We provide end-to-end services, helping global brands design, formulate, package, and export lubricants that meet exact specifications.
We formulate synthetic, semi-synthetic, and mineral oil blends tailored to specific operating temperatures, viscosity grades, and API/ACEA specifications.
Whether you require low-volume test runs or continuous high-output packaging, our modular lines support multiple container shapes and sizes.
Supported by rigorous internal laboratories and third-party certifications to guarantee international border-crossing clearance and chemical safety conformity.
Includes complete graphic labeling support, environmental container selections, and marketing assets to elevate your brand positioning.
1. Demand Analysis
2. Formula Customization
3. Laboratory Sample Testing
4. Automated Production
5. Global Logistics & Support
Our operations comply with globally recognized environmental, quality control, and safety protocols to ensure batch consistency.
Shandong Longhai has earned ISO 9001:2015 Quality Management System Certification, ISO 14001 Environmental Management System Certification, and ISO 45001 / OHSAS 18001 Health and Safety Management System Certification. In addition, our premium formulations are approved by key vehicle manufacturers, including Mercedes-Benz. Backed by PICC China People's Insurance Company, our products are engineered to perform reliably under extreme operating conditions.
Expert insights into preventing motorcycle oil leaks, base oil choices, and international supply logistics.
Motorcycle engines run at much higher RPMs and thermal loads compared to passenger cars. These factors subject seals and gaskets (often made from nitrile, polyacrylate, or fluoroelastomers) to intense heat. Over time, heat drives out the plasticizers within the elastomers, causing them to shrink, dry, and harden. The mechanical vibration of the engine then forms micro-gaps between the seal and metal housing, allowing oil to escape.
Anti-leak formulations incorporate specific seal-swell agents (often ester-based or special synthetic compounds). These chemicals are absorbed into the dried elastomer structure, causing the gasket to swell back to its original volume. This controlled swelling fills small clearances and restores the seal's flexibility, stopping minor leaks and preventing new ones from forming.
Yes, if not formulated carefully. Because many motorcycles use a wet clutch system where the engine oil also bathes the clutch plates, using excessive or generic seal-swell agents can cause clutch slippage. Our formulations are engineered to balance seal expansion while maintaining the dynamic friction coefficients required by the JASO MA/MA2 standards, ensuring positive clutch engagement.
When stored in their original sealed containers, out of direct sunlight and in dry conditions below 40°C, our lubricants maintain chemical stability and performance for up to 5 years. Each batch goes through shear and oxidation stability testing before dispatch to ensure its longevity during transit and storage.
We combine advanced blending systems with rigorous quality controls. Our base oils and additives are automatically weighed and mixed under controlled thermal profiles. Each production batch undergoes testing via gas chromatography, viscometry, and emission spectroscopy to verify chemical properties before packaging and dispatch.
High-specification formulas designed for demanding heavy machinery, commercial diesel fleets, air compressors, and high-load worm gear units.
China High-performance fully synthetic diesel engine oil - born for the extreme Exporter, Exporters
View Specifications
Wholesale High-performance worm gear oil - professional lubrication solution Suppliers, Exporters
View Specifications
China Four-stroke motorcycle special oil - Ultimate power protection expert Suppliers, Exporter
View Specifications
Wholesale Longhai CI-4 PLUS Premium Diesel Oil – Ultimate Engine Protection & Fuel Efficiency Supplier, Exporters
View Specifications
Wholesale High-performance anti-wear hydraulic oil - excellent lubrication protection, improve equipment efficiency Supplier, Service
View Specifications
China Longhai CJ-4 Synthetic Diesel Oil – Premium Protection & Performance Exporter, Exporters
View Specifications
China Longhai Heavy-Duty Gear Oil – Ultimate Protection for Extreme Conditions Supplier, Service
View Specifications
China High-efficiency air compressor oil - professional lubrication protection, improve compressor performance Suppliers, Exporters
View SpecificationsTake a look inside our modern blending facilities, joint innovation centers, and quality control laboratories in Zibo, Shandong.
Enterprise Environment
Joint Innovation Center
Testing Laboratory
High-Speed Filling Station
Blending Reactors
Finished Goods Depot
Verifiable certificates demonstrating conformity to global commercial standards, including chemical composition safety and environmental protocols.
As a global lubricant exporter, Shandong Longhai recognizes the supply chain requirements of international B2B buyers. Sourcing automotive and industrial oils from China demands more than just competitive pricing; it requires chemical consistency, compliant packaging, and reliable logistics. We provide our global partners with complete documentation, including SDS (Safety Data Sheets), customs compliance records, and certificates of analysis (COA) for every shipment.
Through our strategically located warehouses and proximity to Qingdao Port, we offer efficient shipping routes that reduce transit times and lower port logistics costs. Whether you are ordering bulk tankers, IBC totes, 200L drums, or retail cartons, our logistics team coordinates closely with international freight lines to ensure safe and timely delivery.
We are committed to quality, efficiency, and customer-first service. Let's work together to design and manufacture the ideal lubrication solution for your market.
Longhai
