Donaldson test kits offer a quick one-minute test that helps you maintain that cooling system chemical balance. It is recommended that you test your coolant two times a year.
Required actions after testing
If your additive is above 3 units per 1 gallon / 3.8L
Replace the coolant filter with a non- charged filter until the additive concentration falls below 3 units per 1 gallon / 3.8L.
Between 1.2-3 units per gallon / 3.8L
Continue to replace the coolant filter at each oil drain interval.
Below 1.2 units per 1 gallon / 3.8L
Replace the coolant filter and add 0.47L of additive liquid per 15.1L of coolant.