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SAE viscosity grade

The Society of Automotive Engineers (SAE J300) classification of motor oil viscosity: the 'W' number specifies low-temperature cranking viscosity; the trailing number specifies kinematic viscosity at 100°C. Multigrade oils (e.g. 5W-30) meet both specifications through base oil selection and viscosity index improver polymers.

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AroclorC30 17alpha-hopaneDissolved gas analysis (DGA)GC-IRMSGC×GC-TOFMSHopaneKarl Fischer titration (KFT)Unresolved complex mixture (UCM)Zinc dialkyldithiophosphate (ZDTP)

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