2015 KIA Optima fuel

7101
Maintenance
Do not operate the engine in con-fined 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 vehicle for any extended time with
the engine running.
When the engine stalls or fails to start, excessive attempts to restart
the engine may cause damage to
the emission control system.Operating precautions for catalyt-
ic converters (if equipped)
Your vehicle is equipped with a cat-
alytic converter emission control
device.
Therefore, the following precautions
must be observed: Use only UNLEADED FUEL for
gasoline engines.
Do not operate the vehicle when there are signs of engine malfunc-
tion, such as misfire or a noticeable
loss of performance.
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 con-
trol system. All inspections and
adjustments must be made by an
authorized Kia dealer.
Avoid driving with a extremely low fuel level. Running out of fuel could
cause the engine to misfire, dam-
aging the catalytic converter.
Failure to observe these precautions
could result in damage to the catalyt-
ic converter and to your vehicle.
Additionally, such actions could void
your warranties.
WARNING- Fire
Do not park, idle or drive the vehicle over or near flamma-
ble objects, such as grass,
vegetation, paper, leaves, etc.
A hot exhaust system can
ignite flammable items under
your vehicle.
Also, do not remove the heat sink around the exhaust sys-
tem, do not seal the bottom of
the vehicle or do not coat the
vehicle for corrosion control.
It may present a fire risk under
certain conditions.
WARNING- Catalytic
converter
Keep away from the catalytic
converter and exhaust system
while the vehicle is running or
immediately thereafter. The
exhaust and catalytic systems
are very hot and may burn you.

68
Specifications & Consumer information
RECOMMENDED LUBRICANTS AND CAPACITIES
To help achieve proper engine and powertrain performance and durability, use only lubricants of the proper quality.
The correct lubricants also help promote engine efficiency that results in improved fuel economy.
These lubricants and fluids are recommended for use in your vehicle.
LubricantVolumeClassification
Engine oil *1 *2 (drain and refill)
Recommends2.0 T-GDI4.8 l
(5.07 US qt.)ACEA A5 or above*3
2.4 GDIAPI Service SM*3, ILSAC GF-4 or above
ACEA A5 or above
Automatic transaxle fluid
2.0 T-GDI7.8 l(8.24 US qt.)MICHANG ATF SP-IV, SK ATF SP-IV
NOCA ATF SP-IV, Kia genuine ATF SP-IV
2.4 GDI7.1 l(7.50 US qt.)
Coolant
2.0 T-GDI6.5 ~ 6.6 l
(6.87 ~ 6.97 US qt.)
Mixture of antifreeze and water
(Ethylene glycol base coolant for aluminum radiator)
2.4 GDI6.8 l(7.18 US qt.)
Brake fluid0.7~0.8 l
(0.7~0.8 US qt.)FMVSS116 DOT-3 or DOT-4
Fuel70 l(18.49 US gal.)Refer to “Fuel requirements” in chapter 1

87
Specifications & Consumer information
*1Refer to the recommended SAE viscosity numbers on the next page.
*
2Engine oils labeled Energy Conserving Oil are now available. Along with other additional benefits, they contribute to fuel econ-
omy by reducing the amount of fuel necessary to overcome engine friction. Often, these improvements are difficult to measure
in everyday driving, but in a year’s time, they can offer significant cost and energy savings.
*
3API SL/ILSAC GF-3/ACEA A3 oil can be used if the recommended oil is not available.

88
Specifications & Consumer information
Recommended SAE viscosity
number
Always be sure to clean the area
around any filler plug, drain plug, or
dipstick before checking or draining
any lubricant. This is especially
important in dusty or sandy areas
and when the vehicle is used on
unpaved roads. Cleaning the plug
and dipstick areas will prevent dirt
and grit from entering the engine and
other mechanisms that could be
damaged.Engine oil viscosity (thickness) has
an effect on fuel economy and cold
weather operation (engine start and
engine oil flowability). Lower viscosi-
ty engine oils can provide better fuel
economy and cold weather perform-
ance, however, higher viscosity
engine oils are required for satisfac-
tory lubrication in hot weather.
Using oils of any viscosity other than
those recommended could result in
engine damage.
When choosing an oil, consider the
range of temperature your vehicle will
be operated in before the next oil
change. Proceed to select the recom-
mended oil viscosity from the chart.
Temperature Range for SAE Viscosity Numbers
Temperature
Engine Oil
(2.4 GDI) *
1
Engine Oil
(2.0 T-GDI)
°C
(°F)-30 -20 -10 0 10 20 30 40 50 -10 0 20 40 60 80 100 120
10W-30
5W-20, 5W-30
*1. For better fuel economy, it is recommended to use the engine oil of
a viscosity grade SAE 5W-20 (API SM / ILSAC GF-4). However, if
the engine oil is not available in your country, select the proper
engine oil using the engine oil viscosity chart.
20W-50
10W-30
15W-40
5W-30, 5W-40

Index
4I
Checking the coolant level . . . . . . . . . . . . . . . . . . . . 7-31
Engine number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-\
29 Changing the engine oil and filter . . . . . . . . . . . . . . 7-30
Checking the engine oil level . . . . . . . . . . . . . . . . . . 7-29
Engine start/stop button . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 Engine start/stop button position . . . . . . . . . . . . . . . . 5-8
Illuminated engine start/stop button. . . . . . . . . . . . . . 5-8
Explanation of scheduled maintenance items . . . . . . . 7-25
Exterior overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Fuel filler lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 Closing the fuel filler lid . . . . . . . . . . . . . . . . . . . . . 4-32
Emergency fuel filler lid release . . . . . . . . . . . . . . . 4-34
Opening the fuel filler lid. . . . . . . . . . . . . . . . . . . . . 4-32
Fuel requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Do not use methanol . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Gasoline containing alcohol and methanol . . . . . . . . 1-3
Gasoline containing MMT . . . . . . . . . . . . . . . . . . . . . 1-4
Operation in foreign countries . . . . . . . . . . . . . . . . . . 1-5
Use of MTBE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 7-61 Fuse/relay panel description. . . . . . . . . . . . . . . . . . . 7-66 Gross vehicle weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 4-30
Closing the hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Opening the hood . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
How to use this manual . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
If the engine overheats . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
If the engine will not start . . . . . . . . . . . . . . . . . . . . . . . 6-4 If engine doesn’t turn over or turns over slowly . . . . 6-4
If engine turns over normally but does not start . . . . 6-4
If you have a flat tire . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 Changing tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Jack and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Removing and storing the spare tire . . . . . . . . . . . . 6-10
Use of temporary compact spare tire . . . . . . . . . . . . 6-14
If you have a flat tire (with Tire Mobility Kit). . . . . . . 6-17 Components of the Tire Mobility Kit . . . . . . . . . . . 6-19
Distributing the sealant . . . . . . . . . . . . . . . . . . . . . . 6-21
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Notes on the safe use of the Tire Mobility Kit . . . . 6-18
Producing the tire inflation pressure . . . . . . . . . . . . 6-21
F
G
H
I

Index
8I
Tire traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-52
Wheel alignment and tire balance . . . . . . . . . . . . . . 7-50
Wheel replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 7-52
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. 6-23 Emergency towing . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
Removable towing hook (front) . . . . . . . . . . . . . . . . 6-24
Towing service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
Trip computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79 Fuel Economy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-80
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79
Trip A/B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-82\
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 4-22 Closing the trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Emergency trunk lid release cable . . . . . . . . . . . . . . 4-23
Emergency trunk safety release . . . . . . . . . . . . . . . . 4-24
Opening the trunk. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Vehicle break-in process . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Vehicle certification label . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Vehicle identification number (VIN) . . . . . . . . . . . . . . . 8-9
Vehicle load limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-58 Certification label . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-61
Tire and loading information label. . . . . . . . . . . . . . 5-58
Vehicle weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-63 Warning and indicator lights. . . . . . . . . . . . . . . . . . . . . 4-84
Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-90
Warning lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84
Washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-35 Checking the washer fluid level . . . . . . . . . . . . . . . . 7-35
Welcome system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98 Escort welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98
Interior light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98
Welcome light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-98
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
4-25 Power window lock button. . . . . . . . . . . . . . . . . . . . 4-29
Power windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Windshield defrosting and defogging. . . . . . . . . . . . . 4-133 Automatic climate control system . . . . . . . . . . . . . 4-134
Defogging logic . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-135
Manual climate control system . . . . . . . . . . . . . . . 4-133
Winter driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-55 Carry emergency equipment . . . . . . . . . . . . . . . . . . 5-57
Change to "winter weight" oil if necessary . . . . . . . 5-56
Check battery and cables . . . . . . . . . . . . . . . . . . . . . 5-56
Check spark plugs and ignition system . . . . . . . . . . 5-56
Don't let ice and snow accumulate underneath . . . . 5-57
Don't let your parking brake freeze . . . . . . . . . . . . . 5-57
Snowy or Icy conditions. . . . . . . . . . . . . . . . . . . . . . 5-55
To keep locks from freezing. . . . . . . . . . . . . . . . . . . 5-56
Use approved window washer anti-freeze in system . . 5-56
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