Kia Optima: Fuel RequirementsYour new Kia vehicle must use only unleaded fuel having an octane rating of at least 87.
Your new Kia is designed to obtain maximum performance with UNLEADED FUEL, as well as minimize exhaust emissions and spark plug fouling.
✽ NOTICE
NEVER USE LEADED FUEL. The use of leaded fuel is detrimental to the catalytic converter and will damage the engine control system’s oxygen sensor and affect emission control.
Never add any fuel system cleaning agents to the fuel tank other than what Kia has specified or the equivalent. (Consult an authorized Kia dealer for details.)
Driving Tips
Gasoline Containing Alcohol and MethanolSRS components and functions
The SRS consists of the following components:
1. Driver's front air bag module 2. Passenger's front air bag module 3. Side
impact air bag modules 4. Curtain air bag modules 5. Retractor p ...
Knock Sensor (KS). Description and Operation
Description
Knocking is a phenomenon characterized by undesirable vibration
and noise and can cause engine damage. Knock Sensor (KS) is installed on the
cylinder block and senses engine knockin ...
Owner maintenance precautions
Improper or incomplete service may
result in problems. This section gives
instructions only for the maintenance
items that are easy to perform.
As explained earlier in this section, several
p ...