Based on the specific file designation "JASO D0144," you are referring to a critical technical standard issued by the Japanese Automotive Standards Organization (JASO).
The PDF specifies that a temperature-compensating refractometer must be used. It details how to calibrate the device with distilled water and how to correct the reading based on the coolant’s base glycol type (Ethylene Glycol vs. Propylene Glycol). The standard warns against using floating ball hydrometers for used coolant, as they are skewed by dissolved solids. jaso d0144 pdf
This is where JASO D0144 shines. The PDF will contain pass/fail criteria for: Based on the specific file designation "JASO D0144,"
This saves the engine from internal pitting and cavitation erosion over the next winter. jaso d0144 pdf