Kia Optima: Check spark plugs and ignition system

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 y ...

To keep locks from freezing

To keep the locks from freezing, squirt an approved de-icer fluid or glycerine into the key opening. If a lock is covered with ice, squirt it with an approved de-icing fluid to remove the ice. ...

See also:

Installing a Child Restraint System in the Rear Center Seat
To install a child restraint in the rear center seat, do the following: 1. Place the child-restraint in the desired position. Route the lap/ shoulder belt through the restraint according to the s ...

Removal
In the case of the vehicle equipped with immobilizer or button engine start system, perform "Key Teaching" procedure together ...

Snow tires
If you equip your car with snow tires, they should be the same size and have the same load capacity as the original tires. Snow tires should be installed on all four wheels; otherwise, poor ...