SAE International has published an update to SAE J300 on 20 Jan. 2015. SAE J300 defines the limits for a classification of engine lubricating oils in rheological terms only.

This revision continues the process of extending the SAE Engine Oil Viscosity Classification system to lower high-temperature high-shear rate (HTHS) viscosities by adding two new high-temperature viscosity grades – SAE 12 and SAE 8 – to SAE J300 with minimum HTHS viscosities of 2.0 and 1.7 mPa?s, respectively.

The benefit of establishing new viscosity grades is to provide a framework for formulating lower HTHS engine oils in support of original equipment manufacturers’ (OEMs) needs to improve fuel economy.

To order this SAE standard, go to standards.sae.org/j300_201501/.