Part 1: Sequence IID 10th Edition -- Describes an engine test procedure for evaluating the rusting and corrosion inhibition characteristics of motor oils. Relates particularly to short-trip service under typical winter conditions in the upper midwestern United States.

These test sequences provide a technical language to describe the operating conditions for determining the performance of crankcase oils, and the oil properties needed for satisfactory performance in modern passenger cars and light trucks.

Note -- The test method described in STP 315I has not undergone the ASTM standardization procedure and therefore is not a standard recommended practice of ASTM.