ASTM D3321, Test Method for Use of the Refractometer for Field Test Determination of the Freezing Point of Aqueous Engine Coolants, has been revised to reflect advances in engine coolant technology used in modern engines. Standard is used to provide freeze point determination of ethylene glycol and propylene glycol based engine coolants based on correlation of refractive index and EG or PG concentration in water. Test helps prevent engine/cooling system damage under low ambient ...This story is related to the following:Trade Associations