Change to "winter weight" oil if necessary
In some climates it is recommended that a lower viscosity "winter weight" oil be used during cold weather. See section 8 for recommendations. If you aren't sure what weight oil you should use, consult an authorized HYUNDAI dealer.
See also:
Engine Coolant Temperature Warning Light
WARNING:
Never remove the radiator cap when the engine is hot. The engine coolant is
under pressure and could erupt and cause severe burns. Wait until the engine is
cool before removing the rad ...
Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...
Use High Quality Ethylene Glycol Coolant
Your Hyundai is delivered with high quality ethylene glycol coolant in the cooling
system. It is the only type of coolant that should be used because it helps prevent
corrosion in the cooling syst ...