Designation:D8447−22´1StandardTestMethodforDeterminationofTurboChargerDepositsbyThermo-OxidationEngineOilSimulationTest1ThisstandardisissuedunderthefixeddesignationD8447;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Editoriallycorrected1.1inMay2022.1.Scope1.1Thistestmethodcoverstheproceduretodeterminetheamountofdepositsformedbyautomotiveengineoilsutilizingthethermo-oxidationengineoilsimulationtest(TEOST2).3TherangeandapplicabilityoftheTEOSTTurbo2testmethodasderivedfromaninterlaboratorystudyisapproximately5mgto90mg.However,experienceindicatesthatdepositlevelsofupto150mgorgreatercanbeobtained.1.2Thistestmethodusesapatentedinstrument,methodandpatented,numbered,andregistereddepositorrodstraceabletothemanufacturer4andmadespecificallyforthepracticeandprecisionofthetestmethod.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3.1Milligrams(mg),grams(g),milliliters(mL),andliters(L)aretheunitsprovidedbecausetheyareanindustryacceptedstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.Terminology2.1DefinitionsofTermsSpecifictoThisStandard:2.1.1ceramicisolator,n—thefittingthatcompressestheO-ringintothedepositorrodcasingandisolatesthedepositorrodcasingfromthevoltageappliedtothedepositorrod.2.1.2depositorrod4,n—...
