Designation:D8256−22aStandardTestMethodforEvaluationofAutomotiveEngineOilsforInhibitionofDepositFormationintheSequenceVHSpark-IgnitionEngineFueledwithGasolineandOperatedUnderLow-Temperature,Light-DutyConditions1ThisstandardisissuedunderthefixeddesignationD8256;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONPortionsofthistestmethodarewrittenforusebylaboratoriesthatmakeuseofASTMTestMonitoringCenter(TMC2)services(seeAnnexA1).TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesiretoproducetestresultsthatarestatisticallysimilartothoseproducedbylaboratoriespreviouslycalibratedbytheTMC.Ingeneral,theTestPurchaserdecidesifacalibratedteststandistobeused.OrganizationssuchastheAmericanChemistryCouncilrequirethatalaboratoryusetheTMCservicesaspartoftheirtestregistrationprocess.Inaddition,theAmericanPetroleumInstituteandtheGearLubricantReviewCommitteeoftheLubricantReviewInstitute(SAEInternational)requirethatalaboratoryusetheTMCservicesinseekingqualificationofoilsagainsttheirspecifications.TheadvantageofusingtheTMCservicestocalibrateteststandsisthatthetestlaboratory(andhencetheTestPurchaser)hasanassurancethattheteststandwasoperatingattheproperleveloftestseverity.Itshouldalsobeborneinmindthatresultsobtainedinanon-calibratedteststandmaynotbethesameasthoseobtainedinateststandparticipatingintheASTMTMCservicesprocess.LaboratoriesthatchoosenottousetheTMCservicesmaysimplydisregardtheseportions.ASTMInternationalpolicyistoencouragethedevelopmentoftestproceduresbasedongenericequipment.Itisrecognizedthatthereareoccasionswherecritical/sole-sourceequipmenthasbeenapprovedbythetechnicalcommittee(surveillancepanel/taskforce)andisrequiredbythetestprocedure.Thetechnicalcommitteethatoverseesthetestprocedureisencouragedtoclearlyidentifyifthepartis...
