Designation:D6794−14StandardTestMethodforMeasuringtheEffectonFilterabilityofEngineOilsAfterTreatmentwithVariousAmountsofWaterandaLong(6h)HeatingTime1ThisstandardisissuedunderthefixeddesignationD6794;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONAnyproperlyequippedlaboratory,withoutoutsideassistance,canusetheproceduredescribedinthistestmethod.However,theASTMTestMonitoringCenter(TMC)2providesreferenceoilsandanassessmentofthetestresultsobtainedonthoseoilsbythelaboratory(seeAnnexA1).Bythesemeans,thelaboratorywillknowwhethertheiruseofthetestmethodgivesresultsstatisticallysimilartothoseobtainedbyotherlaboratories.Furthermore,variousagenciesrequirethatalaboratoryutilizetheTMCservicesinseekingqualificationofoilsagainstspecifications.Forexample,theU.S.ArmyimposessucharequirementinconnectionwithseveralArmyenginelubricatingoilspecifications.Accordingly,thistestmethodiswrittenforusebylaboratoriesthatutilizetheTMCservices.LaboratoriesthatchoosenottousethoseservicesmaysimplyignorethoseportionsofthetestmethodthatrefertotheTMC.ThistestmethodmaybemodifiedbymeansofinformationlettersissuedbytheTMC.Inaddition,theTMCmayissuesupplementarymemorandarelatedtothetestmethod(seeAnnexA1).Forotherinformation,refertotheresearchreportofthistestmethod.31.Scope*1.1Thistestmethodcoversthedeterminationoftheten-dencyofanoiltoformaprecipitatethatcanpluganoilfilter.Itsimulatesaproblemthatmaybeencounteredinanewenginerunforashortperiodoftime,followedbyalongperiodofstoragewithsomewaterintheoil.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminet...
