Kia Soul EV 2018 Owner's Manual page 406

Maintenance
For mixture percentage, refer to the
following table.
Mixture Percentage
Ambient
(volume)
Temperature
Antifreeze
-15°C (5°F) 35
-25°C (-13°F) 40
-35°C (-31°F) 50
-45°C (-49°F) 60
7 22
Water
65
60
50
40
WARNING
Radiator cap
Do not remove the radiator cap
when the motor compartment
and radiator are hot. Scalding
hot coolant and steam may
blow out under pressure which
may result in serious injury.
Changing the coolant
Have the coolant changed by an
authorized Kia dealer according to
the Maintenance Schedule at the
beginning of this chapter.
Put a thick cloth around the radiator
cap before refilling the coolant in
order to prevent the coolant from
overflowing into motor compartment.
OPSE074002