fuel KIA Optima 2008 2.G User Guide

Driving your vehicle30 4Warning lights / audible indicators Checking operation All warning lights are checked by turning
the ignition switch ON (do not start the
engine). Any light that does not illuminate
should be checked by an authorized Kia
dealer.
After starting the engine, check to make
sure that all warning lights are off. If any
are still on, this indicates a situation that
needs attention. When releasing the
parking brake, the brake system warning
light should go off. The fuel warning light
will stay on if the fuel level is low.Anti-lock brake system
(ABS) warning light (if
equipped) This light illuminates if the key is turned
to ON and goes off in approximately 3
seconds if the system is operating nor-
mally.
If the light stays on, you may have a
problem with your ABS. Contact an
authorized Kia dealer as soon as possi-
ble.
Electronic brake force
distribution (EBD) sys-
tem warning
(if equipped)If ABS and BRAKE warning lights illumi-
nate at the same time while driving, your
vehicle has a problem with the ABS and
EBD system.
In this case, your ABS and regular brake
system may not work normally. Have the
vehicle checked by an authorized Kia
dealer as soon as possible.
Engine oil pressure
warning This warning light indicates the engine oil
pressure is low.
If the warning light illuminates while driv-
ing:
1. Drive safely to the side of the road and
stop.
2. With the engine off, check the engine
oil level. If the level is low, add oil as
required.
If the warning light remains on after
adding oil or if oil is not available, call an
authorized Kia dealer.✽ ✽
NOTICEIf the engine is not stopped immediately,
severe damage could result.
WARNINGS AND INDICATORS
ABS
ABS
WARNING
- Brake indica-
tors
If the both ABS and Brake warning
lights are ON and stay ON, your
vehicle’s brake system will not work
normally. You may experience an
unexpected and dangerous situa-
tion during sudden braking. In this
case, avoid high speed driving and
abrupt braking. Have your vehicle
checked by Authorized Kia Dealer
as soon as possible.

433
Driving your vehicle
Trunk lid open
warning (if equipped)This warning light activates when the
trunk is not closed securely.Door ajar warningThis warning light illuminates when a
door is not closed securely.Low fuel level
warningThis warning light indicates the fuel tank
is nearly empty. The warning light will
come on when the fuel level has dropped
to about 7~8 liters (1.8~2.1 gallons).
Refuel as soon as possible.
Headlight high beam
indicator This indicator illuminates when the head-
lights are on and in the high beam posi-
tion or when the turn signal lever is pulled
into the Flash-to-Pass position.Air bag warning
(if equipped) This warning light will blink or illuminate
for approximately 6 seconds each time
you turn the ignition switch to the ON
position.
If this indicator does not go out, or if it illu-
minates while the vehicle is being driven,
see an authorized Kia dealer for immedi-
ate service.
Malfunction indicator
(if equipped)This indicator light is part of the Engine
Control System which monitors various
emission control system components. If
this light illuminates while driving, it indi-
cates that a potential problem has been
detected somewhere in the emission
control system.
Generally, your vehicle will continue to be
drivable and will not need towing, but
have the system checked by an author-
ized Kia dealer as soon as possible.✽ ✽
NOTICEA loose fuel filler cap may cause the On
Board Diagnostic System Malfunction
Indicator Light ( ) in the instrument
panel to illuminate unnecessarily.
Always make sure that the fuel filler cap
is tight.
CHECKCHECK
AIR
BAG

Driving your vehicle34 4✽
✽
NOTICE• Prolonged driving with the Emission
Control System Malfunction
Indicator Lamp ( ) illuminated
may cause damage to the emission
control systems which could effect dri-
vability and/or fuel economy.
•If the
Emission
Control System
Malfunction Indicator Lamp ( )
begins to flash ON and OFF, potential
catalytic converter damage is possible
which could result in loss of engine
power. Have the Engine Control
System inspected as soon as possible by
an authorized Kia dealer.
ESC indicator
(Electronic Stability
Control) (if equipped) The ESC indicator will illuminate when
the ignition switch is turned ON, but
should go off after approximately 3 sec-
onds. When the ESC is on, it monitors
the driving conditions and under normal
driving conditions, the ESC light will
remain off. When a slippery or low trac-
tion condition is encountered, the ESC
will operate, and the ESC indicator will
blink to indicate the ESC is operating.ESC OFF indicator
(if equipped)The ESC OFF indicator will illuminate
when the ignition switch is turned ON,
but should go off after approximately 3
seconds. To switch to ESC OFF mode,
press the ESC OFF button. The ESC
OFF indicator will illuminate indicating
the ESC is deactivated. If this indicator
stays on in the ESC ON mode, the ESC
may have a malfunction. Take your car to
the authorized Kia dealer and have the
system checked.
Front fog light
indicator (if equipped) This light comes on when the front fog
lights are ON.Auto cruise indicator
(if equipped)CRUISE indicator
The indicator light illuminates when the
cruise control system is enabled.
SET indicator
The indicator light illuminates when the
cruise function switch (COAST/ SET or
RES/ACCEL) is ON.
CHECKCHECK
CHECKCHECK
CRUISESET
ESCESC
OFF

5
Fuel requirements / 5-2
Emission control system / 5-2
Before driving / 5-4
Suggestions for economical operation / 5-5
Special driving conditions / 5-6
Trailer towing / 5-9
Overloading / 5-14
Label information / 5-15
Driving tips

Driving tips2 5FUEL REQUIREMENTSGasoline engine (unleaded)Your new Kia vehicle is designed to use
only unleaded fuel with a minimum
Octane Rating of 87 Anti-Knock Index
(AKI).✽ ✽
NOTICENEVER USE LEADED FUEL. The use
of leaded fuel is detrimental to the cat-
alytic 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. (Consult an
Authorized Kia Dealer for details.)Gasoline containing alcohol and
methanolGasohol, 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 instead
of leaded or unleaded gasoline.
Do not use gasohol containing more than
10% ethanol, and do not use gasoline or
gasohol containing any methanol. Either
of these fuels may cause drivability prob-
lems and damage to the fuel system.Discontinue using gasohol of any kind if
drivability problems occur.
Vehicle damage or driveability problems
may not be covered by the manufactur-
er’s warranty if they result from the use
of:
1. Gasohol containing more than 10%
ethanol.
2. Gasoline or gasohol containing
methanol.
3. Leaded fuel or leaded gasohol.
✽ ✽
NOTICENever use gasohol which contains
methanol. Discontinue use of any gaso-
hol product which impairs drivability.
The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty infor-
mation contained in the Warranty &
Consumer Information Manual in your
vehicle.Vehicle modifications This vehicle should not be modified.
Modification of your Kia could affect its
performance, safety or durability, may
violate governmental safety and emis-
sions regulations, and void the vehicle’s
warranty.
In addition, damage or performance
problems resulting from any modification
may not be covered under warranty.Engine exhaust gas precautions
(carbon monoxide)
WARNING -
Exhaust
Engine exhaust gases contain car-
bon monoxide (CO). Though color-
less and odorless, it is dangerous
and could be lethal if inhaled.
Follow the instructions following to
avoid CO impairment.EMISSION CONTROL SYSTEM

53
Driving tips
Carbon monoxide can be present with
other exhaust fumes. Therefore, if you
smell exhaust fumes of any kind inside
your vehicle, have it inspected and
repaired immediately. If you ever sus-
pect exhaust fumes are coming into
your vehicle, drive it only with all the
windows fully open. Have your vehicle
checked and repaired immediately.
Do not operate the engine in confined
or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.
When the vehicle is stopped in an
open area for more than a short time
with the engine running, adjust the
ventilation system (as needed) to draw
outside air into the vehicle.
Never sit in a parked or stopped vehi-
cle for any extended time with the
engine running.
When the engine stalls or fails to start,
excessive attempts to re-start the
engine may cause damage to the
emission control system.
Operating precautions for catalytic
converters Your vehicle is equipped with a catalytic
converter emission control device.
Therefore, the following precautions
must be observed:
Use only UNLEADED FUEL for gaso-
line engine (unleaded).
Do not operate the vehicle when there
are signs of engine malfunction, such
as misfire or a noticeable loss of per-
formance.
Do not misuse or abuse the engine.
Examples of misuse are coasting with
the ignition off and descending steep
grades in gear with the ignition off. Do not operate the engine at high idle
speed for extended periods (5 minutes
or more).
Do not modify or tamper with any part
of the engine or emission control sys-
tem. All inspections and adjustments
must be made by an authorized Kia
dealer.
Failure to observe these precautions
could result in damage to the catalytic
converter and to your vehicle.
Additionally, such actions could void your
warranties.
WARNING
- Fire
A hot exhaust system can ignite
flammable items under your vehi-
cle. Do not park the vehicle over or
near flammable objects, such as
grass, vegetation, paper, leaves,
etc.

55
Driving tips
SUGGESTIONS FOR ECONOMICAL OPERATIONYour vehicle's fuel economy depends
mainly on your style of driving, where you
drive and when you drive.
Each of these factors affects how many
kilometers (miles) you can get from a liter
(gallon) of fuel. To operate your vehicle
as economically as possible, use the fol-
lowing driving suggestions to help save
money in both fuel and repairs:
Avoid lengthy warm-up idling. Once the
engine is running smoothly, begin driv-
ing. Remember, engine warm-up may
take a little longer on cold days.
Save fuel by accelerating slowly after
stopping.
Keep the engine in tune and follow the
recommended periodic maintenance
schedule. This will increase the life of
all parts and lower your operating
costs.
Do not use the air conditioner unnec-
essarily.
Slow down when driving on rough
roads.
For longer tire life and better fuel econ-
omy, always keep the tires inflated to
the recommended pressures. Maintain a safe distance from other
vehicles to avoid sudden stops. This
will reduce wear on brake linings and
pads. Driving in such a way will also
save fuel because extra fuel is required
to accelerate back to driving speed.
Do not carry unnecessary weight in the
vehicle.
Do not rest your foot on the brake
pedal while driving. This can cause
needless wear, possible damage to the
brakes, and poor fuel economy.
Improper wheel alignment results in
faster tire wear and lower fuel econo-
my.
Open windows at high speeds can
reduce fuel economy.
Fuel economy is less in crosswinds
and headwinds. To help offset some of
this loss, slow down when driving in
these conditions.
Keeping a vehicle in good operating con-
dition is important both for economy and
safety. Therefore, have an authorized Kia
dealer perform scheduled inspections
and maintenance.
WARNING
- Engine off dur-
ing motion
Never turn the engine off to coast
down hills or anytime the vehicle is
in motion. The power steering and
power brakes will not function
properly without the engine run-
ning. Instead, keep the engine on
and downshift to an appropriate
gear for engine braking effect.

59
Driving tips
TRAILER TOWING
✽ ✽
NOTICE
Pulling a trailer improperly can damage
your vehicle and result in costly repairs
not covered by your warranty. To identify what the vehicle trailering
capacity is for your vehicle, you should
refer to the chart on this page.Remember that trailering is different than
just driving your vehicle by itself.
Trailering causes major changes in han-
dling, durability, and fuel economy.
Successful, safe trailering requires cor-
rect equipment, and cautious driving.
This section contains many time-tested,
important trailering tips and safety rules.
Many of these are important for your
safety and that of your passengers.
Please read this section carefully before
you pull a trailer.
WARNING
- Towing a trail-
er
If you don't use the correct equip-
ment or you drive improperly, you
can lose control when you pull a
trailer. For example, if the trailer is
too heavy, the brakes may fail, and
would at least be ineffective to
promptly stop the vehicle. You and
your passengers could be seriously
or fatally injured. Pull a trailer only if
you have followed all the steps in
this section.
WARNING
- Weight limits
Before towing, make sure the total
trailer weight, gross combination
weight, gross vehicle weight, gross
axle weight and trailer tongue load
are all within the limits.
Engine 2.4 Engine 2.7 Engine
Item MT
*1
AT
*2
AT
*2
Maximum trailer Without trailer brakes 454 (1000)*3454 (1000)
weight kg (lbs.) With trailer brakes 907 (2000)*3907 (2000)
Maximum permissible static vertical
80 (176)*380 (176)
load on the coupling device kg (lbs.)*1MT : Manual transaxle
*2AT : Automatic transaxle
*3: Do not use this vehicle for trailer towing.

69
In case of an emergency
Engine compartment
OMG065006
Fuse/Relay panel descriptionInside the fuse/relay box covers, you can find the fuse/relay
label describing fuse/relay name and capacity.
Engine compartment
Description Fuse rating Protected component
I/P B+ 2 50A In panel B+
ABS 2 40A ABS
DRL 15A Daytime running light
HORN 15A Horn
H/LP LOW 15A Headlight (low)
F/PUMP 20A Fuel pump
H/LP HI 15A Headlight (high)
ECU 10A Engine control unit
ABS 1 40A ABS
ALT 125A (150A)* Alternator
SPARE 10A Spare fuse
SPARE 15A Spare fuse
SPARE 20A Spare fuse
FRT FOG 15A Front fog light
ECU RELAY 30A Engine control unit
POWER AMP 20A Amplifier
SPARE 15A Spare fuse
SPARE 20A Spare fuse
P/OUTLET 25A Power outlet
RAD FAN 30A (40A)* Radiator fan
PCU 10A Power train control system sen-
sors, TCU
ABS 10A ABS
S/WARMER 25A Seat warmer
ATM 20A Automatic transaxle control
S/ROOF 20A Sunroof
SPARE 20A Spare fuse

In case of an emergency10 6
OMG065007
Driver-side knee bolster
Description Fuse rating Protected component
BACK UP 10A Back-up light
RR HTD 40A Rear window defroster
IGN 1 30A Ignition
B+ 30A In pannel B
+
TAIL 20A Taillight
A/CON 10A Air conditioner
ECU-1 20A Engine control unit
IGN COIL 20A Ignition coil
SNSR 3 10A Sensors
BLOWER 40A Blower
IGN 2 30A Ignition
SNSR 2 15A Sensors
SNSR 1 15A Sensors
HORN RELAY - Horn relay
HDLP_LOW RELAY - Headlight (low) relay
RAD FAN_HI RELAY - Radiator fan relayRAD FAN_LOW RELAY
- Radiator fan relay
F/PUMP RELAY - Fuel pump relay
WIPER RELAY - Wiper relay
MAIN RELAY - Main relay
START RELAY - Start motor relay
ATM CONT RELAY - Automatic transaxle control relay
A/CON RELAY - Air conditioner relay
* : if equipped