Kia 2011 RIO Owner's Manual page 235

If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion. Bring the
level to F, but do not overfill. If frequent
additions are required, see an authorized
Kia dealer for a cooling system inspec-
tion.
Engine coolant
• Use only soft (de-mineralized) water in
the coolant mixture.
• The engine in your vehicle has alu-
minum engine parts and must be pro-
tected by an ethylene-glycol-based
coolant to prevent corrosion and freez-
ing.
• DO NOT USE alcohol or methanol
coolant or mix them with the specified
coolant.
• Do not use a solution that contains
more than 60% antifreeze or less than
35% antifreeze, which would reduce
the effectiveness of the solution.
For mixture percentage, refer to the fol-
lowing table.
Mixture Percentage (volume)
Ambient
Temperature
Coolant
Solution
5°F (-15°C) 35
-13°F (-25°C) 40
-31°F (-35°C) 50
-49°F (-45°C) 60
Water
65
60
50
40
WARNING -
Do not remove the radiator cap
when the engine and radiator are
hot. Scalding hot coolant and steam
may blow out under pressure caus-
ing serious injury.
Maintenance
1JBA7003
Radiator cap
7 15