ASTM D6922-13(2018)
(Test Method)Standard Test Method for Determination of Homogeneity and Miscibility in Automotive Engine Oils
Standard Test Method for Determination of Homogeneity and Miscibility in Automotive Engine Oils
SIGNIFICANCE AND USE
5.1 It is important that engine oils from different manufacturers be homogeneous and miscible with each other, because operators of automotive engines often do not have prior knowledge of the manufacturer of the oil that is currently used in their application, and engine failure can occur if oils are combined that do not stay homogeneous and function properly.
SCOPE
1.1 This test method covers the determination if an automotive engine oil is homogeneous and will remain so, and if it is miscible with certain standard reference oils after being submitted to a prescribed cycle of temperature changes. This test method is very similar to the homogeneity and miscibility test described in FED–STD–791/3470.1.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 WARNING—Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use Caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location.
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.
General Information
Relations
Standards Content (Sample)
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: D6922 − 13 (Reapproved 2018)
Standard Test Method for
Determination of Homogeneity and Miscibility in Automotive
Engine Oils
This standard is issued under the fixed designation D6922; 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 2. Referenced Documents
1.1 Thistestmethodcoversthedeterminationifanautomo- 2.1 ASTM Standards:
tive engine oil is homogeneous and will remain so, and if it is D97Test Method for Pour Point of Petroleum Products
miscible with certain standard reference oils after being sub- D4057Practice for Manual Sampling of Petroleum and
mitted to a prescribed cycle of temperature changes. This test Petroleum Products
method is very similar to the homogeneity and miscibility test D5844Test Method for Evaluation of Automotive Engine
described in FED–STD–791/3470.1. Oils for Inhibition of Rusting (Sequence IID) (Withdrawn
2003)
1.2 The values stated in SI units are to be regarded as
D6557Test Method for Evaluation of Rust Preventive Char-
standard. No other units of measurement are included in this
acteristics of Automotive Engine Oils
standard.
E1Specification for ASTM Liquid-in-Glass Thermometers
1.3 WARNING—Mercury has been designated by many
E344Terminology Relating to Thermometry and Hydrom-
regulatory agencies as a hazardous substance that can cause
etry
serious medical issues. Mercury, or its vapor, has been dem-
2.2 Federal Test Method Standard:
onstrated to be hazardous to health and corrosive to materials.
FED–STD–791/3470.1HomogeneityandMiscibilityofOils
Use Caution when handling mercury and mercury-containing
products. See the applicable product Safety Data Sheet (SDS)
3. Terminology
for additional information. The potential exists that selling
3.1 Definitions:
mercury or mercury-containing products, or both, is prohibited
3.1.1 calibrate, v—todeterminetheindicationoroutputofa
bylocalornationallaw.Usersmustdeterminelegalityofsales
measuring device with the respect of that of a standard. E344
in their location.
3.1.2 homogeneity, n—theabilityofatestoilitselftoremain
1.4 This standard does not purport to address all of the
the same in appearance throughout (uniform) after submission
safety concerns, if any, associated with its use. It is the
to a series of temperature changes.
responsibility of the user of this standard to establish appro-
3.1.3 miscibility, n—theabilityofareferenceoilandtestoil
priate safety, health, and environmental practices and deter-
to form a uniform mixture after blending and not separate into
mine the applicability of regulatory limitations prior to use.
twophasesaftersubmissiontoaseriesoftemperaturechanges.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.1.4 reference oil, n—an oil of known performance
ization established in the Decision on Principles for the
characteristics, used as a basis for comparison.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 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 Document Summary page on
This test method is under the jurisdiction of ASTM Committee D02 on the ASTM website.
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of The last approved version of this historical standard is referenced on
Subcommittee D02.B0 on Automotive Lubricants. www.astm.org.
Current edition approved Dec. 1, 2018. Published December 2018. Originally AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
approved in 2003. Last previous edition approved in 2013 as D6922–13. 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
DOI:10.1520/D6922-13R18. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6922 − 13 (2018)
3.1.4.1 Discussion—Reference oils are used to calibrate 6.6 Gasket—a ring gasket, about 5.0 mm in thickness, to fit
testing facilities, to compare the performance of other oils, or snugly around the outside of the test jar and loosely inside the
to evaluate other materials (such as seals) that interact with jacket. The purpose of the ring gasket is to prevent the test jar
oils. D5844 from touching the jacket.
3.1.5 specimen, n—a piece or portion of test oil used to
6.7 Bath—a liquid cooling bath suitable to obtain the
make a test.
required temperatures.
3.1.6 test oil, n—any oil subjected to evaluation in an
6.8 Oven—a constant temperature oven suitable to obtain
established procedure. D6557
the required temperatures.
6.9 Automated Pour Point Tester (Alternative)—There are
4. Summary of Test Method
automated pour point testers available and in use that may be
4.1 Visual color determinations and observations are made
advantageous. They save test time, permit the use of smaller
on an undiluted test oil specimen, along with six blends of the
samples, and have other factors which may merit their use. If
same test oil that have been combined with specific reference
automated testers are used, the user shall ensure that all of the
oils.Thepourpointisthendeterminedfortheundilutedtestoil
manufacturer’s instructions for calibration, adjustment, and
specimen and the six blends. The undiluted test oil specimen
operation of the instrument are followed. Report that the pour
and six blends are then allowed to warm to room temperature.
point was determined by an automatic instrument. In some
Color determinations and observations are again made on the
cases, precision of automatic pour point testers may not have
undiluted test oil specimen and six blends. The undiluted test
been determined. In any case of dispute, consider the pour
oilspecimenandsixblendsareheatedto232°C,thenallowed
pointasdeterminedbythemanualmethoddescribedhereinthe
tocooltoroomtemperature,andthenstoredattheirpourpoint
referee test.
temperatures for 18 h to 24 h. The undiluted test oil specimen
and six blends are then allowed to thaw and a series of color
7. Reagents
determinations and observations are made as they reach room
7.1 Reference Oils, HMA through HMF—These are avail-
temperature. All data are recorded on a report form.
able from the Test Monitoring Center.
5. Significance and Use
8. Sampling
5.1 It is important that engine oils from different manufac-
8.1 Take samples to be tested in accordance with the
turers be homogeneous and miscible with each other, because
instructions in Practice D4057.
operators of automotive engines often do not have prior
knowledge of the manufacturer of the oil that is currently used
9. Test Preparation
in their application, and engine failure can occur if oils are
9.1 Place the seven clean test jars in a holder.
combinedthatdonotstayhomogeneousandfunctionproperly.
9.2 Measure and mark each test jar as follows:
6. Apparatus 9.2.1 Measuring inside the test jar, mark each jar at 23 mm
and 54 mm from the bottom.
6.1 Test Jar—cylindrical, of clear glass, flat bottom,
9.2.2 Markthefirsttestjarforusewiththeundilutedtestoil
33.2mmto34.8mmoutsidediameter,and115mmto125mm
specimen.
in height. The inside diameter of the jar can range from
9.2.3 Mark six test jars with the letters A through F to
30.0mm to 32.4mm, within the constraint that the wall
designate which reference oil will be mixed with the test oil.
thickness be no greater than 1.6mm. The jar shall have a line
to indicate a sample height 5mm 63 mm above the inside 9.3 Vigorously shake the test oil.
bottom.
9.4 Using test oil, fill the six jars (that were marked for use
6.2 Thermometers—ASTM 6C, calibrated with a range of with reference oil) to the 23mm mark.
−80°Cto+20°C,conformingtoSpecificationE1.Inaddition,
9.5 Fillthetestjarthatwasmarkedfortheundilutedtestoil,
temperature measuring devices such as liquid-in-glass
to the 54mm mark.
thermometers, thermocouples, or platinum resistance ther-
9.6 Vigorously shake the six reference oils.
mometers may be used, if they provide equivalent or better
accuracy and precision, and cover the required temperature 9.7 Fill the test jars marked A th
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