Kia Optima Hybrid 2017 Owner's Manual page 49

Introduction
1. Gasohol containing more than 10%
ethanol.
2. Gasoline or gasohol containing
methanol.
3. Leaded fuel or leaded gasohol.
CAUTION
Never use gasohol which contains
methanol. Discontinue use of any
gasohol product which impairs driva‐
bility.
Other fuels
Using fuels such as
Silicone (Si) contained fuel,
-
MMT (Manganese, Mn) contained
-
fuel,
Ferrocene (Fe) contained fuel, and
-
Other metalic additives contained
-
fuels, may cause vehicle and engine
damage or cause plugging, misfiring,
poor acceleration, engine stalling,
catalyst melting, abnormal corrosion,
life cycle reduction, etc.
Also, the Malfunction Indicator Lamp
(MIL) may illuminate.
2-04
NOTICE
Damage to the fuel system or per‐
formance problem caused by the
use of these fuels may not be cov‐
ered by your New Vehicle Limited
Warranty.
Use of MTBE
Kia recommends avoiding fuels contain‐
ing MTBE (Methyl Tertiary Butyl Ether)
over 15.0% vol. (Oxygen Content 2.7%
weight) in your vehicle.
Fuel containing MTBE over 15.0% vol.
(Oxygen Content 2.7% weight) may re‐
duce vehicle performance and produce
vapor lock or hard starting.
CAUTION
Your New Vehicle Limited Warranty
may not cover damage to the fuel
system and any performance prob‐
lems that are caused by the use of
fuels containing methanol or fuels
containing MTBE (Methyl Tertiary
Butyl Ether) over 15.0% vol. (Oxygen
Content 2.7% weight.)
Do not use methanol
Fuels containing methanol (wood alco‐
hol) should not be used in your vehicle.
This type of fuel can reduce vehicle
performance and damage components
of the fuel system, engine control sys‐
tem and emission control system.
Fuel Additives
Kia recommends that you use unleaded
gasoline which has an octane rating of
RON (Research Octane Number) 95 /
AKI (Antiknock Index) 91 or higher (for
Europe) or Octane Rating of RON (Rea‐
search Octane Number) 91 / AKI (Anti‐
knock Index) 87 or higher (except Eu‐
rope).
For customers who do not use good
quality gasolines including fuel additives
regularly, and have problems starting
or the engine does not run smoothly,
one bottle of additives added to the
fuel tank at every 15,000 km (For Eu‐
rope)/10,000 km (Except Europe). Addi‐
tives are available from your authorized
Kia dealer along with information on
how to use them. Do not mix other ad‐
ditives.
Operation in foreign countries
If you are going to drive your vehicle in
another country, be sure to: