ASTM D6922-03
(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
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 the standard. The values given in parentheses are for information only.
1.3 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6922–03
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 3. Terminology
1.1 Thistestmethodcoversthedeterminationifanautomo- 3.1 Definitions:
tive engine oil is homogeneous and will remain so, and if it is 3.1.1 calibrate, v—to determine the indication or output of
miscible with certain standard reference oils after being sub- a measuring device with the respect of that of a standard.
mitted to a prescribed cycle of temperature changes. This test E344
method is very similar to the homogeneity and miscibility test 3.1.2 homogeneity, n—the ability of a test oil itself to
described in FED–STD–791/3470.1. remain the same in appearance throughout (uniform) after
1.2 The values stated in SI units are to be regarded as submission to a series of temperature changes.
standard. No other units of measurement are included in this 3.1.3 miscibility, n—theabilityofareferenceoilandtestoil
standard. to form a uniform mixture after blending and not separate into
1.3 This standard does not purport to address all of the twophasesaftersubmissiontoaseriesoftemperaturechanges.
safety concerns, if any, associated with its use. It is the 3.1.4 reference oil, n—an oil of known performance char-
responsibility of the user of this standard to establish appro- acteristics, used as a basis for comparison.
priate safety and health practices and determine the applica- 3.1.4.1 Discussion—Reference oils are used to calibrate
bility of regulatory limitations prior to use. testing facilities, to compare the performance of other oils, or
to evaluate other materials (such as seals) that interact with
2. Referenced Documents
oils. D5844
2.1 ASTM Standards:
3.1.5 specimen, n—a piece or portion of test oil used to
D97 Test Method for Pour Point of Petroleum Products make a test.
D4057 Practice for Manual Sampling of Petroleum and
3.1.6 test oil, n—any oil subjected to evaluation in an
Petroleum Products established procedure. D6557
D5844 Test Method for Evaluation of Automotive Engine
4. Summary of Test Method
Oils for Inhibition of Rusting (Sequence IID)
D6557 Test Method for Evaluation of Rust Preventive 4.1 Visual color determinations and observations are made
Characteristics of Automotive Engine Oils on an undiluted test oil specimen, along with six blends of the
E1 Specification for ASTM Liquid-in-Glass Thermometers same test oil that have been combined with specific reference
E344 Terminology Relating to Thermometry and Hydrom- oils.Thepourpointisthendeterminedfortheundilutedtestoil
etry specimen and the six blends. The undiluted test oil specimen
2.2 Federal Test Method Standard: and six blends are then allowed to warm to room temperature.
FED–STD–791/3470.1 Homogeneity and Miscibility of Color determinations and observations are again made on the
Oils undiluted test oil specimen and six blends. The undiluted test
oil specimen and six blends are heated to 232°C, then allowed
tocooltoroomtemperature,andthenstoredattheirpourpoint
This test method is under the jurisdiction of ASTM Committee D02 on
temperatures for 18 to 24 h. The undiluted test oil specimen
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
and six blends are then allowed to thaw and a series of color
D02.B0 on Automotive Lubricants.
Current edition approved June 10, 2003. Published July 2003. DOI: 10.1520/
determinations and observations are made as they reach room
D6922-03.
temperature. All data are recorded on a report form.
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
5. Significance and Use
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
5.1 It is important that engine oils from different manufac-
Withdrawn. The last approved version of this historical standard is referenced
turers be homogeneous and miscible with each other, because
on www.astm.org.
operators of automotive engines often do not have prior
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6922–03
knowledge of the manufacturer of the oil that is currently used 9.2.1 Measuring inside the test jar, mark each jar at 23 and
in their application, and engine failure can occur if oils are 54 mm from the bottom.
combinedthatdonotstayhomogeneousandfunctionproperly.
9.2.2 Markthefirsttestjarforusewiththeundilutedtestoil
specimen.
6. Apparatus
9.2.3 Mark six test jars with the letters A through F to
6.1 Test Jar—cylindrical, of clear glass, flat bottom, 33.2 to
designate which reference oil will be mixed with the test oil.
34.8-mm outside diameter, and 115 to 125 mm in height. The
9.3 Vigorously shake the test oil.
inside diameter of the jar can range from 30.0 to 32.4 mm,
9.4 Using test oil, fill the six jars (that were marked for use
within the constraint that the wall thickness be no greater than
with reference oil) to the 23-mm mark.
1.6 mm. The jar shall have a line to indicate a sample height
9.5 Fillthetestjarthatwasmarkedfortheundilutedtestoil,
563 mm above the inside bottom.
to the 54-mm mark.
6.2 Thermometers—ASTM 6C, calibrated with a range of
9.6 Vigorously shake the six reference oils.
−80 to +20°C, conforming to Specification E1.
9.7 Fill the test jars marked A through F with the corre-
6.3 Stoppers—clean stoppers, some unbored and others
sponding reference oil to the 54-mm mark.
centrally bored for test thermometers.
9.8 Firmlyplacetheunboredstoppersineachofthetestjars
6.4 Jacket—a glass or metal, water tight, cylindrical form
and shake the test jars vigorously.
with a flat bottom and approximately 120 mm in depth. The
9.9 Remove the stoppers from each test jar.
inside diameter of the jacket shall be 9.0 to 12.0 mm greater
than the outside diameter of the test jar.
6.5 Disk—cork or felt, about 6 mm in thickness and of the 10. Procedure
same diameter as the inside of the jacket.
10.1 Heat the test specimens in the test jars to 46 6 2°C in
6.6 Gasket—a ring gasket, about 5.0 mm in thickness, to fit
a constant temperature oven or liquid bath.
snugly around the outside of the test jar and loosely inside the
10.2 Removethetestjarsfromtheovenandallowtocoolto
jacket. The purpose of the ring gasket is to prevent the test jar
room temperature.
from touching the jacket.
10.3 For each test specimen record evidence of separation,
6.7 Bath—a liquid cooling bath suitable to obtain the
its location, color, and particle size, and the color of the test
required temperatures.
specimen on the record form under Before Treatment (see Fig.
6.8 Oven—a constant temperature oven suitable to obtain
A1.1).
the required temperatures.
10.4 Determination of Pour Point:
6.9 Automated Pour Point Tester (Alternative)—There are
automatedpourpointtestersavailableandinusewhichmaybe
NOTE 1—Thispourpointprocedureisbasedonthemethoddescribedin
advantageous. They save test time, permit the use of smaller
Test Method D97 but with the exception indicated in Note 2.
samples, and have other factors which may merit their use. If
10.4.1 Placearinggasketaroundeachtestjarjustbelowthe
automated testers are used, the user shall ensure that all of the
oil level.
manufacturer’s instructions for calibration, adjustment, and
10.4.2 Place a calibrated thermometer with bored stopper in
operation of the instrument are f
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.