Designation:D6750−15aStandardTestMethodsforEvaluationofEngineOilsinaHigh-Speed,Single-CylinderDieselEngine—1KProcedure(0.4%FuelSulfur)and1NProcedure(0.04%FuelSulfur)1ThisstandardisissuedunderthefixeddesignationD6750;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThetestmethodsdescribedinthisstandardcanbeusedbyanyproperlyequippedlaboratorywithoutoutsideassistance.However,theASTMTestMonitoringCenter(TMC)2providesreferenceoilsandanassessmentofthetestresultsobtainedonthoseoilsbythelaboratory(seeAnnexA15).Bythismeans,thelaboratorywillknowwhetheritsuseofthetestmethodsgivesresultsstatisticallysimilartothoseobtainedbyotherlaboratories.Furthermore,variousagenciesrequirethatalaboratoryusestheTMCservicesinseekingqualificationofoilsagainstspecifications.Forexample,theU.S.Armyhassucharequirementinsomeofitsengineoilspecifications.Accordingly,thesetestmethodsarewrittenforthoselaboratoriesthatusetheTMCservices.LaboratoriesthatchoosenottousetheseservicesmayignorethoseportionsofthetestmethodsthatrefertotheTMC.ThesetestmethodsmaybemodifiedbyInformationLettersissuedperiodicallybytheTMCafterthepublicationofthiseditionofthestandardtobecomepartofit.TheselettersareobtainablefromtheTMC.Inaddition,theTMCmayissuesupplementarymemorandarelatedtothetestmethods,alsoobtainablefromtheTMC.1.Scope*1.1Thesetestmethodscovertheperformanceofengineoilsintendedforuseincertaindieselengines.Theyareperformedinastandardizedhigh-speed,single-cylinderdieselenginebyeitherthe1K(0.4%massfuelsulfur)or1N(0.04%massfuelsulfur)procedure.3Theonlydifferenceinthetwotestmethodsisthefuelused.Pistonandringgroovedeposit-formingtendencyandoilconsumptionaremeasured.Also,thepiston,therings,andthelinerareexaminedfordistressandtheringsformobility.ThesetestmethodsarerequiredtoevaluateoilsintendedtosatisfyAPIse...
