LOW-TEMPERATUREPUMPABILITYCHARACTERISTICSOFENGINEOILSINFULL-SCALEENGINES#PreparedbytheDataAnalysisPanelofASTMCommitteeD-2R&DDivisionVll-ConNon-Newtonian,Low-ShearPhenomenaASTMDATASERIESPUBLICATION57ListPrice$16.0005-057000-12AMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceStreet,Philadelphia,Pa.19103©byAMERICANSOCIETYFORTESTINGANDMATERIALS1975LibraryofCongressCatalogCardNumber:75-24603NOTETheSocietyisnotresponsible,asabody,forthestatementsandopinionsadvancedinthispublication.PrintedinLongIslandCity,N.Y.September1975DataSeriesDS57AmericanSocietyforTestingandMaterialsRelatedASTMPublicationsMulticylinderTestSequencesforEvaluatingAutomotiveEngineOils,STP315F(1972),$8.25,04-315060-12ShearStabilityofMultigradeCrankcaseOil—IPFleetTests,DS49-S1(1974),$4.00,05-049001-12SingleCylinderEngineTestsforEvaluatingPerformanceofCrankcaseLubricants,STP509(1972),$5.00,04-509000-12EditorialStaffJaneB.Wheeler,ManagingEditorHelenM.Hoersch,AssociateEditorCharlotteE.Wilson,SeniorAssistantEditorEllenJ.McGlinchey,AssistantEditorSUMMARYLow-temperatureengineoilpumpabilitydatahavebeenobtainedonthirteenASTMPumpabilityReferenceOilsinsevenfull-scaletestengines.Border-linePumpingTemperaturesbasedongalleryoilpressuretracesweredeter-minedforallthirteenReferenceOilsinfourofthetestengines,andfornineoftheReferenceOilsinallseventestengines.Datawerealsoobtainedastothetypeofflowfailureoccurring(air-bindingorflow-limited)andonrockerarmoilingtimes.Theresultsindicatesubstantialdifferencesinpumpabilityamongbothtestoilsandtestengines.Possiblereasonsforthesedifferencesareanalyzed,andamodel,basedonengineoilpumpinletsystemdimensions,isproposed.Thismodelaccountsforsomeofthedifferencesfoundinengineseverityandthetypeofflowfailurewhichoccurs.Thepumpabilitydatareportedshouldprovidethebasisfordevelopmentofalaboratorybenchtesttopredictengineoilpumpability.Resultsfromvariousbenchtestsandenginepumpingrigsandtheircorrelationwiththefull-scaleenginedatawillbesummarizedinalaterreport.INTRODUCTIONANDBACKGROUNDThecurrentASTMCom...
