Sn500 base oil manufacturers

Sn500 is a Group I solvent-refined base oil characterized by its high viscosity. Buyers must verify the Viscosity Index (typically 90-105), a Flash Point above 230°C for safety, and a Pour Point (usually -6°C to -12°C) to ensure fluidity in cold climates. Additionally, check the Sulfur content and Color (ASTM D1500), as these indicate the refinement quality and oxidation stability.

Sn500 is primarily used as a blending stock for high-performance lubricants. It is ideal for manufacturing engine oils, industrial gear oils, hydraulic oils, and transmission fluids. Its excellent solubility for additives makes it a preferred choice for formulating heavy-duty lubricants used in maritime, automotive, and manufacturing sectors.

Suppliers should adhere to ISO 9001 for quality management. For the product itself, request a Certificate of Analysis (COA) for every batch. Ensure the oil meets API (American Petroleum Institute) base oil categories. If you are sourcing from China, look for suppliers verified by Made-in-China.com who provide third-party inspection reports from agencies like SGS or Intertek.

The primary difference lies in kinematic viscosity. Sn500 is a 'heavy' base oil compared to the 'light' Sn150. While Sn150 is used for thinner lubricants, Sn500 provides a thicker protective film, making it essential for machinery operating under high loads and high temperatures. Sn600 is even heavier, but Sn500 is often considered the most versatile grade for general industrial blending.

The most significant risks include quality substitution (mixing with recycled oil) and price volatility. To mitigate this, always use Escrow services or Letters of Credit (L/C). Ensure the contract specifies that the final payment is contingent upon a successful pre-shipment inspection by an independent laboratory to confirm the chemical composition matches the agreed specs.

For Sn500, the most cost-effective methods are Flexitanks (24,000 liters per 20ft container) or ISO Tanks. Flexitanks are generally cheaper for one-way trips, while ISO Tanks offer higher safety for hazardous materials. Ensure the supplier is experienced in loading and securing Flexitanks to prevent leaks during sea transit.

Base oil prices are closely tied to global crude oil benchmarks. Negotiate based on a formula-based pricing model if planning long-term contracts. For MOQs, while large refineries prefer vessel loads, many professional exporters on Made-in-China.com offer flexible MOQs starting from one 20ft container (approx. 20 metric tons) to accommodate medium-sized blenders.

You will need a Material Safety Data Sheet (MSDS), a Commercial Invoice, a Packing List, and a Bill of Lading. Crucially, provide a Certificate of Origin to potentially benefit from preferential tariffs under trade agreements (like RCEP). Ensure the HS Code (typically 271019) is correctly declared to avoid customs delays or fines.