Kia Optima: Recommended lubricants and capacitiesTo 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 improved fuel economy.
These lubricants and fluids are recommended for use in your vehicle.

*1 Refer to the recommended SAE viscosity numbers on the next page.
*2 Engine oils labeled Energy Conserving Oil are now available. Along with other
additional benefits, they contribute to fuel economy by reducing
the amount of fuel necessary to overcome engine friction. Often, these
improvements are difficult to measure in everyday driving, but in a year’s
time, they can offer significant cost and energy savings.
*3 If the API service SM engine oil is not available in your country, you are
able to use API service SL.
Tires and wheels
Recommended SAE viscosity
numberElement Replacement
Your vehicle is equipped with a viscous paper air cleaner filter. It must be
replaced when necessary, and should not be cleaned and reused.
1 Remove the four (4) air cleaner cover attaching clips.
...
Console Storage Compartment
To access the console storage compartment, pull up on the locking tab at the
forward end of the console lid and lift center console lid. ...
Installation
In the case of the vehicle equipped with immobilizer
or button engine start system, perform "Key Teaching" procedure together
...