ASTM D7097-19
(Test Method)Standard Test Method for Determination of Moderately High Temperature Piston Deposits by Thermo-Oxidation Engine Oil Simulation Test—TEOST MHT
Standard Test Method for Determination of Moderately High Temperature Piston Deposits by Thermo-Oxidation Engine Oil Simulation Test—TEOST MHT
SIGNIFICANCE AND USE
5.1 The test method is designed to predict the deposit-forming tendencies of engine oil in the piston ring belt and upper piston crown area. Correlation has been shown between the TEOST MHT procedure and the TU3MH Peugeot engine test in deposit formation. Such deposits formed in the ring-belt area of a reciprocating engine piston can cause problems with engine operation and longevity. It is one of the required test methods in Specification D4485 to define API Category-Identified engine oils.6
SCOPE
1.1 This test method covers the procedure to determine the mass of deposit formed on a specially constructed test rod exposed to repetitive passage of 8.5 g of engine oil over the rod in a thin film under oxidative and catalytic conditions at 285 °C. The range of applicability of the Moderately High Temperature Thermo-Oxidation Engine Test (TEOST MHT2) test method as derived from an interlaboratory study is approximately 10 mg to 100 mg. However, experience indicates that deposit values from 1 mg to 150 mg or greater may be obtained.
1.2 This test method uses a patented instrument, method and patented, numbered, and registered depositor rods traceable to the manufacturer3 and made specifically for the practice and precision of the test method.4
1.3 The values stated in SI units are to be regarded as standard.
1.3.1 Although not an SI unit, the special name liter (L) is allowed by SI for the cubic decimeter (dm3) and the milliliter (mL) for the SI cubic centimeter (cm3). Likewise, the special name millimeter (mm) is allowed by SI as a measurement of length.
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7097 − 19
Standard Test Method for
Determination of Moderately High Temperature Piston
Deposits by Thermo-Oxidation Engine Oil Simulation Test—
1
TEOST MHT
This standard is issued under the fixed designation D7097; 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* responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1.1 This test method covers the procedure to determine the
mine the applicability of regulatory limitations prior to use.
mass of deposit formed on a specially constructed test rod
1.5 This international standard was developed in accor-
exposedtorepetitivepassageof8.5gofengineoilovertherod
dance with internationally recognized principles on standard-
in a thin film under oxidative and catalytic conditions at
ization established in the Decision on Principles for the
285°C. The range of applicability of the Moderately High
2 Development of International Standards, Guides and Recom-
Temperature Thermo-Oxidation Engine Test (TEOST MHT )
mendations issued by the World Trade Organization Technical
test method as derived from an interlaboratory study is
Barriers to Trade (TBT) Committee.
approximately 10mg to 100mg. However, experience indi-
cates that deposit values from 1mg to 150mg or greater may
2. Referenced Documents
be obtained.
5
2.1 ASTM Standards:
1.2 Thistestmethodusesapatentedinstrument,methodand
D4485Specification for Performance ofActiveAPI Service
patented, numbered, and registered depositor rods traceable to
Category Engine Oils
3
the manufacturer and made specifically for the practice and
D6335Test Method for Determination of High Temperature
4
precision of the test method.
Deposits by Thermo-Oxidation Engine Oil Simulation
1.3 The values stated in SI units are to be regarded as
Test
standard.
1.3.1 Although not an SI unit, the special name liter (L) is
3. Terminology
3
allowed by SI for the cubic decimeter (dm ) and the milliliter
3.1 Definitions of Terms Specific to This Standard:
3
(mL) for the SI cubic centimeter (cm ). Likewise, the special
3.1.1 bubble airflow gauge, n—a precision bore glass tube
name millimeter (mm) is allowed by SI as a measurement of
marked in tenths of a milliliter used to measure accurately the
length.
flow rate of air around and past the depositor rod and to
1.4 This standard does not purport to address all of the
calibrate mass air flow controllers recommended for use in the
safety concerns, if any, associated with its use. It is the
procedure.
3.1.2 depositor rod deposits, n—particulate matter formed
on the depositor rod surface by oxidation of the thin film of
1
This test method is under the jurisdiction of ASTM Committee D02 on
passingoilexposedtotherodtemperatureandair,andweighed
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.09.0G on Oxidation Testing of Engine Oils. after appropriate washing and drying to obtain the net mass
Current edition approved Dec. 1, 2019. Published January 2020. Originally
gain.
approved in 2005. Last previous edition approved in 2016 as D7097–16a. DOI:
3.1.3 filter deposits, n—particulates washed from the de-
10.1520/D7097-19.
2
TEOSTand MHTare registered trademarks of theTannas Co. (Reg. 2001396),
positor rod after the test and collected on a special multi-layer
Tannas Company, 4800 James Savage Rd., Midland, MI 48642.
filter cartridge.
3
The sole source of supply of the apparatus known to the committee at this time
2
is Tannas Company, 4800 James Savage Rd., Midland, MI 48642. If you are aware 3.1.4 TEOST , n—an acronym for Thermo-Oxidation En-
of alternative suppliers, please provide this information to ASTM International
gine Oil Simulation Test.
Headquarters.Your comments will receive careful consideration at a meeting of the
1
responsible technical committee, which you may attend.
4
The TEOST instrument, method and rod are patented. Interested parties are
5
invited to submit information regarding the identification of an alternative(s) to this For referenced ASTM standards, visit the ASTM website, www.astm.org, or
patented technology to ASTM Headquarters. Your comments will receive careful contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
consideration at a meeting of the responsible technical committee, which you may Standards volume information, refer to the standard’s Document Summary page on
a
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7097 − 16a D7097 − 19
Standard Test Method for
Determination of Moderately High Temperature Piston
Deposits by Thermo-Oxidation Engine Oil Simulation Test—
1
TEOST MHT
This standard is issued under the fixed designation D7097; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers the procedure to determine the mass of deposit formed on a specially constructed test rod exposed
to repetitive passage of 8.5 g of engine oil over the rod in a thin film under oxidative and catalytic conditions at 285 °C. The range
2
of applicability of the Moderately High Temperature Thermo-Oxidation Engine Test (TEOST MHT ) test method as derived from
an interlaboratory study is approximately 10 mg to 100 mg. However, experience indicates that deposit values from 1 mg to
150 mg or greater may be obtained.
1.2 This test method uses a patented instrument, method and patented, numbered, and registered depositor rods traceable to the
3 4
manufacturer and made specifically for the practice and precision of the test method.
1.3 The values stated in SI units are to be regarded as standard.
3
1.3.1 Although not an SI unit, the special name liter (L) is allowed by SI for the cubic decimeter (dm ) and the milliliter (mL)
3
for the SI cubic centimeter (cm ). Likewise, the special name millimeter (mm) is allowed by SI as a measurement of length.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
5
2.1 ASTM Standards:
D4485 Specification for Performance of Active API Service Category Engine Oils
D6335 Test Method for Determination of High Temperature Deposits by Thermo-Oxidation Engine Oil Simulation Test
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bubble airflow gauge, n—a precision bore glass tube marked in tenths of a milliliter used to measure accurately the flow
rate of air around and past the depositor rod and to calibrate mass air flow controllers recommended for use in the procedure.
3.1.2 depositor rod deposits, n—particulate matter formed on the depositor rod surface by oxidation of the thin film of passing
oil exposed to the rod temperature and air, and weighed after appropriate washing and drying to obtain the net mass gain.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.09.0G on Oxidation Testing of Engine Oils.
Current edition approved Sept. 1, 2016Dec. 1, 2019. Published September 2016January 2020. Originally approved in 2005. Last previous edition approved in 2016 as
D7097 – 16.D7097 – 16a. DOI: 10.1520/D7097-16A.10.1520/D7097-19.
2
TEOST and MHT are registered trademarks of the Tannas Co. (Reg. 2001396), Tannas Company, 4800 James Savage Rd., Midland, MI 48642.
3
The sole source of supply of the apparatus known to the committee at this time is Tannas Company, 4800 James Savage Rd., Midland, MI 48642. If you are aware of
alternative suppliers, please provide this information to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible
1
technical committee, which you may attend.
4
The TEOST instrument, method and rod are patented. Interested parties are invited to submit information regarding the identification of an alternative(s) to this patented
1
technology to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s
...
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