ASTM D8447-22

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D8447 − 22
Standard Test Method for
Determination of Turbo Charger Deposits by Thermo-
1
Oxidation Engine Oil Simulation Test
This standard is issued under the fixed designation D8447; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This test method covers the procedure to determine the
amount of deposits formed by automotive engine oils utilizing
2 3 2. Terminology
the thermo-oxidation engine oil simulation test (TEOST ).
2
The range and applicability of the TEOST Turbo test method 2.1 Definitions of Terms Specific to This Standard:
asderivedfromaninterlaboratorystudyisapproximately5mg 2.1.1 ceramic isolator, n—the fitting that compresses the
to 9mg. However, experience indicates that deposit levels of
O-ring into the depositor rod casing and isolates the depositor
up to 150mg or greater can be obtained. rod casing from the voltage applied to the depositor rod.
4
2.1.2 depositor rod , n—a patented, specially made,
1.2 Thistestmethodusesapatentedinstrument,methodand
numbered, and registered steel rod (used once for each test) on
patented, numbered, and registered depositor rods traceable to
4
which the deposits are collected; it is resistively heated and
the manufacturer and made specifically for the practice and
controlled by a thermocouple inserted to a pre-determined
precision of the test method.
depth in the hollow rod.
1.3 The values stated in SI units are to be regarded as
2.1.3 drain tube, n—the tube connecting the lower end cap
standard. No other units of measurement are included in this
of the glass mantle to the reactor chamber.
standard.
1.3.1 Milligrams(mg),grams(g),milliliters(mL),andliters
2.1.4 end cap, n—the fitting used to tighten the ceramic
(L) are the units provided because they are an industry isolators onto the O-rings at both ends of the glass mantle.
accepted standard.
2.1.5 filter deposits, n—the mass in milligrams of the
1.4 This standard does not purport to address all of the
deposits collected after test on a special multi-layer filter
safety concerns, if any, associated with its use. It is the cartridge used once for each test.
responsibility of the user of this standard to establish appro-
2.1.6 glass mantle, n—the glass sleeve that surrounds the
priate safety, health, and environmental practices and deter-
depositor rod.
mine the applicability of regulatory limitations prior to use.
2.1.7 pump, n—the gear pump that is used to control the
1.5 This international standard was developed in accor-
flow rate of the test oil through the depositor rod casing.
dance with internationally recognized principles on standard-
2.1.8 pump inlet tube, n—the tube connecting the reactor
ization established in the Decision on Principles for the
chamber to the pump.
Development of International Standards, Guides and Recom-
2.1.9 pump outlet tube, n—the tube connecting the pump to
the glass mantle.
1
This test method is under the jurisdiction of ASTM Committee D02 on
2.1.10 reactor chamber, n—the heated reservoir that con-
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
tains the 20mL test oil sample circulated past the deposit rod
Subcommittee D02.09 on Oxidation of Lubricants.
during the test; the reactor is equipped with a magnetic stir-bar
Current edition approved April 1, 2022. Published May 2022. DOI: 10.1520/
D8447-22. to continuously mix the chamber contents.
2
TEOST and TEOST Turbo are registered trademarks of the Tannas Co., 4800
2.1.11 rod deposits, n—the mass, in milligrams, of the
James Savage Rd., Midland, MI 48642.
3
deposits collected on the depositor rod.
The Development of Thermo-Oxidation Engine Oil Simulation Test (TEOST),
Society of Automotive Engineers (SAE No. 932837), 400 Commonwealth Dr.,
2.1.12 rod O-rings, n—the O-rings that seal the outside of
Warrendale, PA 15096-0001.
4 the rod and the depositor rod casing to prevent sample leaks.
The sole source of supply of the item known to the committee at this time is
Tannas Co., 4800 James Savage Rd., Midland, MI 48642. If you are aware of
2.1.13 thermocouple lock collar, n—afittingthattightenson
alternative suppliers, please provide this information to ASTM International
the thermocouple to ensure the thermocouple is at the correct
Headquarters.Your comments will receive careful consideration at a meeting of the
responsible technical committee, which you may attend. depth when placed inside the rod.
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