Kia Optima: Recommended LubricantsTo 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.
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.
These lubricants and fluids are recommended for use in your vehicle.

*1) Refer to the recommended SAE viscosity numbers on this page.
Recommended SAE Viscosity NumberDon't let ice and snow accumulate
underneath
Under some conditions, snow and ice
can build up under the fenders and interfere
with the steering. When driving in
severe winter conditions where this may
happen, you should periodically chec ...
Rear window defroster
Type A
Type B
The defroster heats the window to remove frost, fog and thin ice from the interior
and exterior of the rear window, while the engine is running.
To activate the rear window defr ...
General Information
General Troubleshooting Information
Before Troubleshooting
1.
Check applicable fuses in the
appropriate fuse/relay box.
2.
Check the battery for damage,
state of char ...