Lubricant oil sae 50

Buyers must prioritize the Viscosity Index, which for SAE 50 should typically fall between 17.6 to 21.8 mm²/s at 100°C. Ensure the oil meets API (American Petroleum Institute) service categories such as CF/SF or CH-4/SJ depending on whether it is for diesel or gasoline engines. Additionally, verify the Total Base Number (TBN); a higher TBN (e.g., 8-12 mg KOH/g) is essential for neutralizing acidic byproducts in high-sulfur fuel environments.

Request a Certificate of Analysis (COA) for every batch to confirm the chemical composition. Look for suppliers who adhere to ISO 9001:2015 quality management systems. It is highly recommended to perform a Flash Point test (should be >220°C for safety) and a Pour Point test (typically -9°C to -15°C) to ensure the oil performs correctly under specific operational temperatures.

SAE 50 is a monograde oil primarily used in heavy-duty diesel engines, marine engines, and stationary power generators operating under high-temperature conditions. It is also widely utilized in older vintage engines or transmissions that require high-viscosity protection to prevent metal-to-metal contact and reduce oil consumption.

Products must comply with GHS (Globally Harmonized System) for labeling and packaging. For the European market, ensure REACH compliance. If the oil is intended for specific machinery, check for OEM approvals from manufacturers like Caterpillar, Cummins, or Volvo, as using non-approved oil can void equipment warranties.

The biggest risks are adulteration (re-refined oil sold as virgin oil) and leakage during transit. To mitigate this, use Made-in-China.com's Secured Trading services and insist on tamper-evident seals on all drums or flexitanks. Always verify the Material Safety Data Sheet (MSDS) to ensure the product is classified correctly for customs to avoid heavy fines.

Lubricant prices are tied to Base Oil spot prices (Group I, II, or III). Negotiate a formula-based pricing model if you are a long-term buyer. For MOQs, standard suppliers usually require a 20ft container (approx. 80 drums), but you can negotiate a mixed-load of different grades (SAE 30, 40, 50) to meet the volume requirement while managing inventory.

Lubricant oil is generally classified as non-hazardous for sea freight, but it requires specialized handling. Ensure the supplier uses heavy-duty steel drums (208L) or ISO Tanks for bulk shipments. Confirm that the shipping agent is experienced in liquid logistics to prevent delays at the port due to improper spill-containment documentation.

Utilize the Audit Reports available on Made-in-China.com to check the supplier's factory capacity and legal status. Use Letter of Credit (L/C) or Escrow payment terms for the first few transactions. Never wire full payments to personal accounts; always ensure the bank account name matches the company name on the business license.