SN500 Base Oil

The volume neutral stock for engine & industrial oils

SN500 is the highest-volume solvent-neutral grade in the world lubricant trade and the backbone of most blends. It contracts against kinematic viscosity at 40°C (roughly 90–110 cSt) and 100°C (10.5–11.5 cSt), viscosity index (≥ 95 Group I, ≥ 100 hydrotreated Group II), flash point (≥ 220°C COC), pour point (≤ -6°C) and ASTM colour (≤ 2.0 Group I, ≤ 0.5 Group II). Group I SN500 carries sulphur around 0.3–0.9% and saturates in the 70–85% band; Group II is hydroprocessed to under 0.03% sulphur and over 90% saturates. That difference is not cosmetic — it changes oxidation life, additive response and volatility, and it is why an API SN/SP engine-oil formulation will usually name Group II while a mineral hydraulic or industrial oil is content with Group I.

A blender reaches for SN500 rather than SN150 when the formulation needs body and film strength as the base rather than dilution — mono- and multigrade engine oils, gear and transmission oils, hydraulic and turbine oils, grease base fluid, and as the middle of an SN150/SN500/bright-stock ladder that lets you hit any SAE grade from three tanks. Where SN500 runs out is at the top end: if you need KV100 above roughly 12 cSt without going synthetic, bright stock does what SN500 cannot. The Strait of Hormuz has been severely restricted since 28 February 2026, and base oil that loads inside the Gulf is not moving normally. CBIL brokers virgin Group I and Group II SN500 from South Korean and Singaporean refiners and from Middle East supply that loads outside the strait against COA and SGS verification of viscosity, VI, flash, pour, colour and sulphur. Supply is arranged in 24 MT flexitanks, ISO tanks and new steel drums on FOB, CFR and CIF terms, spot or on term contract to smooth your blending schedule.

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Excluded origins are not offered, including product re-exported, blended or re-processed through a third country. Every lot moves with a certificate of origin naming the producing plant, mine or grower country, and nothing is quoted before the seller and loading point are known.