Introduction
Hyundai Sonata / Sonata 2011 Owners Manual / Introduction
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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 9 for recommendations. If you aren't sure
what weight oil you s ...
Engine coolant
The high-pressure cooling system has a reservoir filled with year-round antifreeze
coolant. The reservoir is filled at the factory.
Check the antifreeze protection and coolant level at least once a ...
Check Battery and Cables
Winter puts additional burdens on the battery system. Visually inspect the battery
and cables as described in Section 6. The level of charge in your battery can be
checked by your Hyundai dealer o ...


