Eighty-Eight Royale FWD V6-3.8L VIN K (1996)
Coolant: Testing and Inspection
Coolant Concentration Testing
Coolant Concentration Test
Some coolant manufacturers have started to mix other types of glycol in their coolant formulations; propylene glycol is the most common new ingredient.
A hydrometer will not always provide a correct measurement of freeze protection when anything other than ethylene glycol and water is being tested.
The degree of inaccuracy will vary depending on the proportion of other glycols present in the coolant.
All new GM vehicles are produced with coolant that can be accurately measured with a hydrometer; however, when the type and quality of coolant being
