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 NumberChild-protector rear door lock
The child safety lock is provided to help prevent children from accidentally
opening the rear doors from inside the vehicle. The rear door safety locks should
be used whenever children are in th ...
Circuit Diagram
...
Removal
1.
Disconnect the negative (-) battery
terminal.
2.
Remove the front wheel guard
clip(2EA).(Refer to the BD group - "Front bumper")
3.
D ...