STP 1564, Viscosity and Rheology of In-Service Fluids as They Pertain to Condition Monitoring, is available from ASTM International. Publication includes 11 peer-reviewed papers covering topics such as: Grease Working and its Role in Consistency Trending; Die-Extrusion Method for Comparing Changes in Grease Consistency and Flow Characteristics; Start-Up Viscosity of In-Service Engine Oils at Low Temperatures; and Application of Sensors for In-Situ Measurements of In-Service Grease ...This story is related to the following:Trade Associations