Designation:D7097−16aStandardTestMethodforDeterminationofModeratelyHighTemperaturePistonDepositsbyThermo-OxidationEngineOilSimulationTest—TEOSTMHT1ThisstandardisissuedunderthefixeddesignationD7097;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheproceduretodeterminethemassofdepositformedonaspeciallyconstructedtestrodexposedtorepetitivepassageof8.5gofengineoilovertherodinathinfilmunderoxidativeandcatalyticconditionsat285°C.TherangeofapplicabilityoftheModeratelyHighTemperatureThermo-OxidationEngineTest(TEOSTMHT2)testmethodasderivedfromaninterlaboratorystudyisapproximately10mgto100mg.However,experienceindi-catesthatdepositvaluesfrom1mgto150mgorgreatermaybeobtained.1.2Thistestmethodusesapatentedinstrument,methodandpatented,numbered,andregistereddepositorrodstraceabletothemanufacturer3andmadespecificallyforthepracticeandprecisionofthetestmethod.41.3ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3.1AlthoughnotanSIunit,thespecialnameliter(L)isallowedbySIforthecubicdecimeter(dm3)andthemilliliter(mL)fortheSIcubiccentimeter(cm3).Likewise,thespecialnamemillimeter(mm)isallowedbySIasameasurementoflength.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:5D4485SpecificationforPerformanceofActiveAPIServiceCategoryEngineOilsD6335TestMethodforDeterminationofHighTemperatureDepositsbyThermo-OxidationEngineOilSimulationTest3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1bubbleairflowgauge,n—aprecisionboreglasstubemarkedintenthsofamilliliterusedtomeasureaccuratelytheflowrateofairaroundandpastthedepo...
