Chrysler Oxidation and Deposit Test gets green light from ASTM panel

AUSTIN, Texas—The Chrysler Oxidation and Deposit Test was approved by the ASTM Passenger Car Engine Oil Classification Panel, which met on Dec. 8, to be developed as an ASTM Test Method by the Sequence III Surveillance Panel.

The test is one of six new tests being developed for the next passenger car engine oil category in North America and Japan known as ILSAC GF-6. The test recently completed precision matrix testing and despite initial concerns over outlier data, the motion to develop the test as an ASTM method passed with broad consensus.

The test, which measures percent viscosity increase (PVIS) and weighed piston deposits (WPD), is one of two tests that will replace the Sequence IIIG that is one of the tests for the current ILSAC GF-5 category.

Test sponsor Chrysler said that the precision matrix results showed “repeatability, reproducibility and discrimination on PVIS and WPD,” and is thus suitable for measuring the PVIS and WPD of engine oil, and is ready to be fully developed as an ASTM method by the Sequence III Surveillance Panel.