1.1 This specification covers the requirements for ethylene glycol or propylene glycol or ethylene glycol containing glycerin base engine coolants used in automobiles or other light-duty service cooling systems. When concentrates are used at 40 % to 60 % concentration (allowance to 70 % concentration agreement between manufacturer and user) by volume in water, or when prediluted glycol base engine coolants 50 volume % or higher engine coolant concentrate are used without further dilution, they will function effectively to provide protection against freezing, boiling, and corrosion.
1.2 The coolants governed by this specification are categorized as follows: Coolant Type Description I Ethylene glycol base concentrate II Propylene glycol base concentrate V Ethylene glycol base concentrate containing glycerin III Ethylene glycol predilute 50 volume % or higher engine coolant concentrate IV Propylene glycol predilute 50 volume % or higher engine coolant concentrate VI Ethylene glycol base predilute containing glycerin 50 volume % or higher engine coolant concentrate NOTE 1—This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients. This specification shall also apply to engine coolants prepared using glycol generated from recycled or reprocessed used coolant or reprocessed industrial-source glycol, provided that said glycol meets the requirements of Specification E1177. Separate specifications (D6471 and D6472) exist for engine coolants prepared from recycled or reprocessed used coolant or reprocessed industrial-source glycol that does not meet the requirements established in Specification E1177. This specification shall also apply to glycol based engine coolants prepared using fully refined glycerin provided that said glycerin meets the requirements for Specification D7640.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. NOTE 2—This specification applies to glycol base engine coolant for automobiles and light-duty service. Specifications D4985 and D6210 exist for heavy duty engine service.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D3306-21 Referenced Document
ASTM D1119 Standard Test Method for Percent Ash Content of Engine Coolants*, 2022-03-01 Update
ASTM D1120 Standard Test Method for Boiling Point of Engine Coolants
ASTM D1121 Standard Test Method for Reserve Alkalinity of Engine Coolants and Antirusts
ASTM D1122 Standard Test Method for Density or Relative Density of Engine Coolant Concentrates and Engine Coolants By The Hydrometer
ASTM D1123 Standard Test Methods for Water in Engine Coolant Concentrate by the Karl Fischer Reagent Method
ASTM D1126 Standard Test Method for Hardness in Water
ASTM D1177 Standard Test Method for Freezing Point of Aqueous Engine Coolants
ASTM D1287 Standard Test Method for pH of Engine Coolants and Antirusts
ASTM D1384 Standard Test Method for Corrosion Test for Engine Coolants in Glassware
ASTM D1881 Standard Test Method for Foaming Tendencies of Engine Coolants in Glassware
ASTM D1882 Standard Test Method for Effect of Cooling System Chemical Solutions on Organic Finishes for Automotive Vehicles
ASTM D2570 Standard Test Method for Simulated Service Corrosion Testing of Engine Coolants
ASTM D2809 Standard Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With Engine Coolants
ASTM D3321 Standard Test Method for Use of the Refractometer for Field Test Determination of the Freezing Point of Aqueous Engine Coolants
ASTM D3634 Standard Test Method for Trace Chloride Ion in Engine Coolants
ASTM D4327 Standard Test Method for Anions in Water by Chemically Suppressed Ion Chromatography
ASTM D4340 Standard Test Method for Corrosion of Cast Aluminum Alloys in Engine Coolants Under Heat-Rejecting Conditions
ASTM D4725 Standard Terminology for Engine Coolants
ASTM D4985 Standard Specification for Low Silicate Ethylene Glycol Base Engine Coolant for Heavy Duty Engines Requiring a Pre-Charge of Supplemental Coolant Additive (SCA)*, 2023-09-13 Update
ASTM D512 Standard Test Methods for Chloride Ion In Water
ASTM D516 Standard Test Method for Sulfate Ion in Water
ASTM D5827 Standard Test Method for Analysis of Engine Coolant for Chloride and Other Anions by Ion Chromatography
ASTM D5931 Standard Test Method for Density and Relative Density of Engine Coolant Concentrates and Aqueous Engine Coolants by Digital Density Meter
ASTM D6130 Standard Test Method for Determination of Silicon and Other Elements in Engine Coolant by Inductively Coupled Plasma-Atomic Emission Spectroscopy
ASTM D6210 Standard Specification for Fully-Formulated Ethylene-Glycol-Base Engine Coolant for Heavy-Duty Engines
ASTM D6471 Standard Specification for Recycled Prediluted Aqueous Glycol Base Engine Coolant (50 Volume % Minimum) for Automobile and Light-Duty Service
ASTM D6472 Standard Specification for Recycled Glycol Base Engine Coolant Concentrate for Automobile and Light-Duty Service*, 2024-04-21 Update
ASTM D6660 Standard Test Method for Freezing Point of Aqueous Ethylene Glycol Base Engine Coolants by Automatic Phase Transition Method*, 2024-04-21 Update
ASTM D7640 Standard Specification for Engine Coolant Grade Glycerin
ASTM E1177 Standard Specification for Engine Coolant Grade Ethylene Glycol
ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ASTM E394 Standard Test Method for Iron in Trace Quantities Using the 1,10-Phenanthroline Method*, 2022-09-01 Update
ASTM D3306-21 history
2021ASTM D3306-21 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2020ASTM D3306-20 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2019ASTM D3306-19 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2014ASTM D3306-14 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2011ASTM D3306-11 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2010ASTM D3306-10 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2009ASTM D3306-09 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2008ASTM D3306-08a Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2008ASTM D3306-08 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2005ASTM D3306-05 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2003ASTM D3306-03 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2001ASTM D3306-01 Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
2000ASTM D3306-00a Standard Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service