This test method covers the determination of the tendency of a fully formulated engine oil to form a precipitate that causes an abrupt viscosity increase due to gelation. It simulates a problem that may be encountered after multiple cold starts or short drive times, resulting in a buildup of water contamination in the oil. After long storage periods, gelation of the oil/water/precipitate mixture can be observed.
Engine oil; Filterability; Gelation; EOGT
Requested by vehicle OEMs to be incorporated into new Engine Oil Specification for light duty vehicles in understanding the filter plugging tendency of oils. It would help to determine if oils would create filter plugging and cause failures in vehicles. Users would be engine oil formulators looking to meet specification limits.
The title and scope are in draft form and are under development within this ASTM Committee.
Date Initiated: 05-10-2023
Technical Contact: Yong Li McFarland
Item: 000
Ballot:
Status: