ASTM D6022-01 - 10.11.2001
 
1. Scope

1.1 This practice specifies the procedure for the calculation of Permanent Shear Stability Index (PSSI) of an additive using viscosities before and after a shearing procedure.

1.2 PSSI is calculated for a single blend component and can then be used to estimate the effects of that component on finished lubricant blends.

1.3 This practice is applicable to many products and may use data from many different test methods. The calculation is presented in its most general form in order not to restrict its use.

 
2. Referenced Documents

D4485-24

Standard Specification for Performance of Active API Service Category Engine Oils

D2603-20

Standard Test Method for Sonic Shear Stability of Polymer-Containing Oils

D5621-24

Standard Test Method for Sonic Shear Stability of Hydraulic Fluids

D5275-20

Standard Test Method for Fuel Injector Shear Stability Test (FISST) for Polymer Containing Fluids

D5119-02

Standard Test Method for Evaluation of Automotive Engine Oils in the CRC L-38 Spark-Ignition Engine (Withdrawn 2003)

D7109-25

Standard Test Method for Shear Stability of Polymer-Containing Fluids Using a European Diesel Injector Apparatus at 30 Cycles and 90 Cycles

D6278-20a

Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus (Includes all amendments and changes 6/16/2020).

CEC L45

T 93 Viscosity Shear Stability of Transmission Lubricants (KRL)