Designation:D7589−15aStandardTestMethodforMeasurementofEffectsofAutomotiveEngineOilsonFuelEconomyofPassengerCarsandLight-DutyTrucksinSequenceVIDSparkIgnitionEngine1,2ThisstandardisissuedunderthefixeddesignationD7589;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONPortionsofthistestmethodarewrittenforusebylaboratoriesthatmakeuseofASTMTestMonitoringCenter(TMC)3services(seeAnnexA1).TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesiretoproducetestresultsthatarestatisticallysimilartothoseproducedbylaboratoriespreviouslycalibratedbytheTMC.Ingeneral,theTestPurchaserdecidesifacalibratedteststandistobeused.OrganizationssuchastheAmericanChemistryCouncilrequirethatalaboratoryutilizetheTMCservicesaspartoftheirtestregistrationprocess.Inaddition,theAmericanPetroleumInstituteandtheGearLubricantReviewCommitteeoftheLubricantReviewInstitute(SAEInternational)requirethatalaboratoryusetheTMCservicesinseekingqualificationofoilsagainsttheirspecifications.TheadvantageofusingtheTMCservicestocalibrateteststandsisthatthetestlaboratory(andhencetheTestPurchaser)hasanassurancethattheteststandwasoperatingattheproperleveloftestseverity.Itshouldalsobeborneinmindthatresultsobtainedinanon-calibratedteststandmaynotbethesameasthoseobtainedinateststandparticipatingintheASTMTMCservicesprocess.LaboratoriesthatchoosenottousetheTMCservicesmaysimplydisregardtheseportions.1.Scope*1.1Thistestmethodcoversanenginetestprocedureforthemeasurementoftheeffectsofautomotiveengineoilsonthefueleconomyofpassengercarsandlight-dutytruckswithgrossvehicleweight3856kgorless.Thetestsareconductedusingaspecifiedspark-ignitionenginewithadisplacementof3.6L(GeneralMotors)4onadynamometerteststand.Itappliestomultiviscositygradeoilsusedintheseapplications.1.2ThevaluesstatedinSIun...
