Designation:D5579−19´1StandardTestMethodforEvaluatingtheThermalStabilityofManualTransmissionLubricantsinaCyclicDurabilityTest1ThisstandardisissuedunderthefixeddesignationD5579;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallyupdatedTMCgovernanceinformationinJune2022.INTRODUCTIONPortionsofthistestmethodarewrittenforusebylaboratoriesthatmakeuseofASTMTestMonitoringCenter(TMC)2,3services(seeAnnexA1–AnnexA4).TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesiretoproducetestresultsthatarestatisticallysimilartothoseproducedbylaboratoriespreviouslycalibratedbytheTMC.Ingeneral,thetestpurchaserdecidesifacalibratedteststandistobeused.OrganizationssuchastheAmericanChemistryCouncilrequirethatalaboratoryutilizetheTMCservicesaspartoftheirtestregistrationprocess.Inaddition,theAmericanPetroleumInstituteandtheGearLubricantReviewCommitteeoftheLubricantReviewInstitute(SAEInternational)requirethatalaboratoryusetheTMCservicesinseekingqualificationofoilsagainsttheirspecifications.TheadvantageofusingtheTMCservicestocalibrateteststandsisthatthetestlaboratory(andhencethetestpurchaser)hasanassurancethattheteststandwasoperatingattheproperleveloftestseverity.Itshouldalsobeborneinmindthatresultsobtainedinanon-calibratedteststandmaynotbethesameasthoseobtainedinateststandparticipatingintheASTMTMCservicesprocess.ASTMInternationalpolicyistoencouragethedevelopmentoftestproceduresbasedongenericequipment.Itisrecognizedthatthereareoccasionswherecritical/sole-sourceequipmenthasbeenapprovedbythetechnicalcommittee(surveillancepanel/taskforce)andisrequiredbythetestprocedure.Thetechnicalcommitteethatoverseesthetestprocedureisencouragedtoclearlyidentifyifthepartisconsideredcriticalinthetestprocedure.Ifapartisdeemedtobecritical,ASTMencouragesalte...
