Kia Optima: Wheel replacementWhen replacing the metal wheels for any reason, make sure the new wheels are equivalent to the original factory units in diameter, rim width and offset.
WARNING
A wheel that is not the correct size may adversely affect wheel and bearing life, braking and stopping abilities, handling characteristics, ground clearance, body-to-tire clearance, snow chain clearance, speedometer and odometer calibration, headlight aim and bumper height.
Tire replacement
Tire tractionSchedule 1 - Severe Maintenance
I: Inspect and, if necessary, adjust, correct, clean or replace.
R: Replace or change. ...
Fuel requirements
Your new Kia vehicle is designed to use only unleaded fuel having a pump octane
number ((R+M)/2) of 87 (Research Octane Number 91) or higher.
Your new vehicle is designed to obtain maximum performa ...
Overheating
If your temperature gauge indicates overheating, if you experience a loss of
power, or if you hear a loud knocking or pinging noise, the engine has probably
overheated. Should any of these symptom ...