Designation:D4858−13StandardTestMethodforDeterminationoftheTendencyofLubricantstoPromotePreignitioninTwo-Stroke-CycleGasolineEngines1ThisstandardisissuedunderthefixeddesignationD4858;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethod2evaluatestheperformanceoflubri-cantsintendedforuseintwo-stroke-cyclespark-ignitiongaso-lineenginesthatarepronetopreignition.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3B152/B152MSpecificationforCopperSheet,Strip,Plate,andRolledBarD439SpecificationforAutomotiveGasoline(Withdrawn1990)4D445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)D664TestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitrationD874TestMethodforSulfatedAshfromLubricatingOilsandAdditivesD910SpecificationforLeadedAviationGasolinesD2270PracticeforCalculatingViscosityIndexfromKine-maticViscosityat40and100°CD2699TestMethodforResearchOctaneNumberofSpark-IgnitionEngineFuelD2700TestMethodforMotorOctaneNumberofSpark-IgnitionEngineFuelD2885TestMethodforDeterminationofOctaneNumberofSpark-IgnitionEngineFuelsbyOn-LineDirectCompari-sonTechniqueD2896TestMethodforBaseNumberofPetroleumProductsbyPotentiometricPerchloricAcidTitrationD4857TestMethodforDeterminationoftheAbilityofLubricantstoMinimizeRingStickingandPistonDepositsinTwo-Stroke-CycleGasolineEnginesOtherThanOut-boardsD4863TestMethodforDe...
