Concentrate and water for a target antifreeze % - plus approximate freeze protection.
Total cooling system volume in litres (workshop manual figure).
A higher concentrate % protects to a lower temperature, up to about 60%.
We show the litres of concentrate and water to add.
A 50/50 mix is the common all-round choice, protecting to roughly -37 C. In milder climates 33-40% is enough; never go above about 60% because more concentrate actually reduces cooling performance.
Multiply the system capacity by the target percentage for the concentrate, and the rest is water. The calculator does this for any capacity and target.
Yes. Above ~60% concentrate the mixture cools worse and can actually freeze at a higher temperature, so stick within the recommended band.
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