Designation:D6984−15aStandardTestMethodforEvaluationofAutomotiveEngineOilsintheSequenceIIIF,Spark-IgnitionEngine1ThisstandardisissuedunderthefixeddesignationD6984;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONPortionsofthistestmethodarewrittenforusebylaboratoriesthatmakeuseofASTMTestMonitoringCenter(TMC)2services(seeAnnexA1).TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesiretoproducetestresultsthatarestatisticallysimilartothoseproducedbylaboratoriespreviouslycalibratedbytheTMC.Ingeneral,theTestPurchaserdecidesifacalibratedteststandistobeused.OrganizationssuchastheAmericanChemistryCouncilrequirethatalaboratoryutilizetheTMCservicesaspartoftheirtestregistrationprocess.Inaddition,theAmericanPetroleumInstituteandtheGearLubricantReviewCommitteeoftheLubricantReviewInstitute(SAEInternational)requirethatalaboratoryusetheTMCservicesinseekingqualificationofoilsagainsttheirspecifications.TheadvantageofusingtheTMCservicestocalibrateteststandsisthatthetestlaboratory(andhencetheTestPurchaser)hasanassurancethattheteststandwasoperatingattheproperleveloftestseverity.Itshouldalsobeborneinmindthatresultsobtainedinanon-calibratedteststandmaynotbethesameasthoseobtainedinateststandparticipatingintheASTMTMCservicesprocess.LaboratoriesthatchoosenottousetheTMCservicesmaysimplydisregardtheseportions.1.Scope*1.1Thistestmethodcoversanenginetestprocedureforevaluatingautomotiveengineoilsforcertainhigh-temperatureperformancecharacteristics,includingoilthickening,varnishdeposition,oilconsumption,aswellasenginewear.Suchoilsincludebothsingleviscositygradeandmultiviscositygradeoilsthatareusedinbothspark-ignition,gasoline-fueledengines,aswellasindieselengines.NOTE1—Companiontestmethodsusedtoevaluateengineoilperfor-manceforspecificationrequir...
