This test method covers an engine test procedure for evaluating
diesel engine oils for performance characteristics, including
viscosity increase and soot concentrations
(loading).2 This test
method is commonly referred to as the Mack T-8.
This test method also provides the procedure for running an
extended length T-8 test, which is commonly referred to as the T-8E
and an abbreviated length test, which is commonly referred to as
T-8A. The procedures for the T-8E and the T-8A are identical to the
T-8 with the exception of the items specifically listed in Annex A8
and Annex A9 respectively. Additionally, the procedure
modifications listed in Annex A8 and Annex A9 refer to the
corresponding section of the T-8 procedure.
The values stated in SI units are to be regarded as standard. No
other units of measurement are included in this standard.
Exceptions—Where there is no direct SI equivalent such
as the units for screw threads, National Pipe Threads/ diameters,
tubing size, sole source equipment suppliers, and oil consumption
in grams per kilowatt-hour.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. See Annex A6 for specific safety
2 The ASTM Test
Monitoring Center will update changes in this test method by means
of Information Letters. This edition incorporates revisions
contained in all information letters through 15–1. Information
letters may be obtained from the ASTM Test Monitoring Center, 6555
Penn Avenue, Pittsburgh, PA 15206-4489, Attention:
*A Summary of Changes section appears at the end of this
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