Kia Optima: Change to "winter weight" oil if necessary

Check battery and cables

Winter puts additional burdens on the battery system. Visually inspect the battery and cables as described in section 7. The level of charge in your battery can be checked by an authorized Kia ...

Check spark plugs and ignition system

Inspect your spark plugs as described in section 7 and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way. ...

See also:

Welcome light (if equipped)
When all the doors (and trunk) are locked and closed, the room lamp will come on for about 15 seconds if any of the below is performed. Without smart key system - When the door unlock butto ...

Manual Antenna
Your car uses a manual stainless steel antenna to receive both AM and FM broadcast signals. Pull up the antenna using your fingers, as shown in the drawing. ✽ NOTICE Before entering an au ...

Recommended Lubricants
To help achieve proper engine and powertrain performance and durability, use only lubricants of the proper quality. The correct lubricants also help promote engine efficiency that results in impro ...