Base Oil SN600

Base Oil SN600 Definition

Base oil SN600 is defined as a base oil at the upper end of the specifications for Grade I base oils. It is generally used in lubricant production. It is a Group I base oil which has undergone solvent refining processes. To finish the refining it was hydrogen treated to clear out any impurities.

Base oil is referred to as a base for lubricants. The most important constituent of the volume of lubricants is base oil and, on average, constitutes more than 1% of the formulation of a lubricant. In some lubricants (compressor and hydraulic oil) 2% of the oil is base oil and only 2% is additives. Base oils can be obtained from petroleum or non-oil sources. Most of the world’s base oils come from crude oil refining. The major constituents of base oils are paraffinic, naphthenic and aromatic compounds.

Chemical properties of base oil and how it affects the performance of the final lubricant

  1. Volatile: Oil depletion, oil thickening and sediment formation.
  2. Surface activity: foaming, air release, emulsion formation and pressure.
  3. Oxidation: Formation of sediments, oil concentration, sludge formation and corrosion of metals.
  4. Viscosity: Low temperature fluidity, energy loss, wear protection and proper cooling.
  5. Solvent power: engine cleanup, sealant compatibility, process applications and formulation stability.


  1. works as a base stock for several industrial lubricants.
  2. Engine oils.
  3. Transmission fluids.
  4. Gear oils.
  5. Metal working fluids.
  6. Greases.
  7. Hydraulic oils.
  8. Transformer oils.


  1. Highly saturated
  2. Virtually no aromatics or impurities
  3. Colorless
  4. Uniform composition
  5. High oxidation/thermal stability
  6. Viscosity stability
  7. Low volatility
  8. Improved demulsibility