ASTM_D_7603_-_13.pdf

Designation:D760313Standard Test Method forDetermination of Storage Stability and Compatibility inAutomotive Gear Oils1This standard is issued under the fixed designation D7603;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of storagestability characteristics and the compatibility of automotivegear lubricants when blended with reference lubricants.Thepurpose of the test is to determine if performance-enhancingadditives separate out under defined conditions.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D1193 Specification for Reagent WaterD4175 Terminology Relating to Petroleum,PetroleumProducts,and LubricantsD5760 Specification for Performance of Manual Transmis-sion Gear LubricantsE542 Practice for Calibration of Laboratory VolumetricApparatusE1272 Specification for Laboratory Glass Graduated Cylin-ders2.2 SAE Standards:3J2360 Lubricating Oil,Gear Multipurpose(Metric)MilitaryUse2.3 Federal Test Method Standard:4FED-STD-791/3440.1 Storage Solubility Characteristics ofUniversal Gear LubricantsFED-STD-791/3440.2 Compatibility Characteristics of Uni-versal Gear Lubricants3.Terminology3.1 Definitions:3.1.1 calibrate,vto determine the indication or output of ameasuring device(for example,thermometer,manometer,engine)with respect to that of a standard.3.1.2 candidate oil,nan oil that is intended to have theperformance characteristics necessary to satisfy a specificationand is to be tested against that specification.D41753.1.3 reference oil,nan oil of known performancecharacteristics,used as a basis for comparison.3.1.3.1 DiscussionReference oils are used to calibratetesting facilities,to compare the performance of other oils,orto evaluate other materials(such as seals)that interact withoils.D41753.1.4 test oil,nany oil subjected to evaluation in anestablished procedure.D41754.Summary of Test Method4.1 Separation of the performance-enhancing additives in atest oil during storage is determined by heating it to 120 C,storing at room temperature for 30 days,and making aqualitative observation as to whether any material has sepa-rated out.4.1.1 An optional,non-mandatory test method is also de-scribed in Appendix X1 and Appendix X2 for quantifying thepercent of the additive that separated out during storage of thetest oil.4.2 The compatibility of a test oil is determined by blendingit with different reference oils,heating to 120 C,storing atroom temperature for 30 days,and making a qualitativeobservation as to whether any material has separated out.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0.01 on Passenger Car Engine Oils.Current edition approved June 15,2013.Published July 2013.Originallyapproved in 2010.Last previous edition approved in 2010 as D7603 10.DOI:10.1520/D7603-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/www.sae.org.4Available online at (search for FED-STD-791 in thedocument ID field or from Standardization Documents Order Desk,DODSSP,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5098,http:/dodssp.daps.dla.mil.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2.1 An optional,non-mandatory test method is also de-scribed in Appendix X1 and Appendix X2 for quantifying thepercent of the additive that separated out of the test oil/reference oil mixture due to a compatibility problem betweenthese two oils.5.Significance and Use5.1 To avoid equipment failure,a gear oil should remain ahomogeneous liquid and the performance-enhancing additivesshould not separate out when the oil is stored for an extendedperiod of time.5.2 In addition,because different oils are often mixed whentopping off,gear oils from different manufacturers,or contain-ing different base fluids or performance-enhancing additivesshould