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 NumberInspection
1.
Connect the battery voltage and
check the blower motor rotation.
2.
If the blower motor voltage is
not operated well, substitute with a known-good blower m ...
Steering Angle Sensor. Description and Operation
Description
The Steering Angle Sensor (SAS) is installed in MDPS (Motor Driven Power Steering)
and it sends messages to HECU through CAN communication line.The SAS is used
to determine turning di ...
CVVT Oil Temperature Sensor (OTS). Specifications
Specification
Temperature [°C(°F)]
Resistance (kΩ)
-40(-40)
52.15
-20(-4)
16.52
0(32)
...