Designation:D3306−21StandardSpecificationforGlycolBaseEngineCoolantforAutomobileandLight-DutyService1ThisstandardisissuedunderthefixeddesignationD3306;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstherequirementsforethyleneglycolorpropyleneglycolorethyleneglycolcontainingglycerinbaseenginecoolantsusedinautomobilesorotherlight-dutyservicecoolingsystems.Whenconcentratesareusedat40%to60%concentration(allowanceto70%concentra-tionagreementbetweenmanufactureranduser)byvolumeinwater,orwhenpredilutedglycolbaseenginecoolants50volume%orhigherenginecoolantconcentrateareusedwithoutfurtherdilution,theywillfunctioneffectivelytoprovideprotectionagainstfreezing,boiling,andcorrosion.1.2Thecoolantsgovernedbythisspecificationarecatego-rizedasfollows:CoolantTypeDescriptionIEthyleneglycolbaseconcentrateIIPropyleneglycolbaseconcentrateVEthyleneglycolbaseconcentratecontainingglycerinIIIEthyleneglycolpredilute50volume%orhigherenginecoolantconcentrateIVPropyleneglycolpredilute50volume%orhigherenginecoolantconcentrateVIEthyleneglycolbasepredilutecontainingglycerin50volume%orhigherenginecoolantconcentrateNOTE1—Thisspecificationisbasedontheknowledgeoftheperfor-manceofenginecoolantspreparedfromneworvirginingredients.Thisspecificationshallalsoapplytoenginecoolantspreparedusingglycolgeneratedfromrecycledorreprocessedusedcoolantorreprocessedindustrial-sourceglycol,providedthatsaidglycolmeetstherequirementsofSpecificationE1177.Separatespecifications(D6471andD6472)existforenginecoolantspreparedfromrecycledorreprocessedusedcoolantorreprocessedindustrial-sourceglycolthatdoesnotmeettherequirementsestablishedinSpecificationE1177.Thisspecificationshallalsoapplytoglycolbasedenginecoolantspreparedusingfullyrefinedglycerinprovidedthatsaidglycerinmeetstherequirem...
