Change to "winter weight" oil if necessary
Hyundai Sonata / Sonata 2011 Owners Manual / Driving your vehicle / Winter driving / 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:
Keys
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Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...
Purge Control Solenoid Valve (PCSV)
The purge control solenoid valve is controlled by the Engine Control Module (ECM);
when the engine coolant temperature is low during idling, the PCSV closes so that
evaporated fuel is not taken in ...