Fuel Requirements; Gasoline Engine; Unleaded/Leaded; Gasoline Containing Alcohol And Methanol - Kia Optima 2017 Owner's Manual

FUEL REQUIREMENTS

Gasoline engine

Unleaded
For Europe
For the optimal vehicle performance,
we recommend you to use unleaded
gasoline with an octane rating of RON
(Research Octane Number) 95 / AKI
(Anti Knock Index) 91 or higher.
You may use unleaded gasoline with an
octane rating of RON 91~94 / AKI 87~90
but it may result in slight performance
reduction of the vehicle. (Do not use
methanol blended fuels.)
Except Europe
Your new Kia vehicle is designed to use
only unleaded fuel having an Octane
Rating of RON (Research Octane Num‐
ber) 91 / AKI (Antiknock Index) 87 or
higher. (Do not use methanol blended
fuels.)
Your new vehicle is designed to obtain
maximum performance with UNLEA‐
DED FUEL, as well as minimize exhaust
emissions and spark plug fouling.
CAUTION
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 has been specified. (We recom‐
mend that you consult an authorized
Kia dealer for details.)
WARNING
• Do not "top off" after the nozzle
automatically shuts off when re‐
fueling.
• Always check that the fuel cap is
installed securely to prevent fuel
spillage in the event of an acci‐
dent.
Leaded (if equipped)
For some countries, your vehicle is de‐
signed to use leaded gasoline. When
you are going to use leaded gasoline,
we recommend that you ask an au‐
thorized Kia dealer whether leaded
gasoline in your vehicle is available or
not.
Octane Rating of leaded gasoline is
same with unleaded one.
Gasoline containing alcohol and
methanol
Gasohol, a mixture of gasoline and
ethanol (also known as grain alcohol),
and gasoline or gasohol containing
methanol (also known as wood alcohol)
are being marketed along with or in‐
stead of leaded or unleaded gasoline.
Do not use gasohol containing more
than 10% ethanol, and do not use gas‐
oline or gasohol containing any metha‐
nol. Either of these fuels may cause
drivability problems and damage to the
fuel system, engine control system and
emission control system.
Discontinue using gasohol of any kind if
drivability problems occur.
Vehicle damage or drivability problems
may not be covered by the manufac‐
turer's warranty if they result from the
use of:
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