2020 KIA OPTIMA PHEV fuel

H2
HEV (HYBRID ELECTRIC VEHICLE) SYSTEM
The Kia Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the electric motor for power. The electric
motor is run by a 270V high-voltage HEV battery.
Depending on the driving conditions, the HEV computer selectively operates between the engine and the electric
motor or even both at the same time.
Fuel efficiency increases when the engine is at idle, or when the vehicle is driven by the electric motor with the HEV
battery.
The HEV battery charge must be maintained because, at times, the engine may come on even at idle to act as a gen-
erator. Charging also occurs when decelerating or by regenerative braking.
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H27
Coasting guide (if equipped)
A chime will sound and the coasting
guide indicator will blink four times to
inform the driver when to take the
foot off the accelerator by anticipat-
ing a decelerating event* based on
the analysis of driving routes and
road conditions according to the nav-
igation system. It encourages the
driver to remove the foot from the
pedal and allow coasting down the
road with EV motor only. This helps
preventing unnecessary fuel con-
sumption and increases fuel efficien-
cy.❈
Example of a deceleration event is
going down an extended hill,
approaching a toll booth, and
approaching reduced speed
zones.
Press the Engine Start/Stop button
and put the shift lever in P(Park). In
the User Settings Mode, select
Driver assistance, Coasting Guide,
and then On to turn on the system.
Cancel the selection of coasting
guide to turn off the system. For the
explanation of the system, press and
hold the [OK] button.

To activate the system, take the fol-
lowing procedures. Enter your desti-
nation information on the navigation
and select the driving route. Select
the ECO mode in the Integrated
Driving Control System. Then, satisfy
the following.
- The driving speed should be
between 37 mph (60 km/h) and 99
mph (160 km/h).
❈ The operating speed may vary
due to difference between instru-
ment cluster and navigation effect-
ed by tire inflation level.
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H28
✽ ✽NOTICE
Coasting guide is only a supplemen-
tal system to assist with fuel-efficient
driving in certain situations. Thus,
the operating conditions may be dif-
ferent in accordance with
traffic/road conditions (i.e. driving
in a traffic jam, driving on a slope,
driving on a curve). Thus, take the
actual driving conditions into con-
sideration, such as distances from
the vehicles ahead/ behind, while
referring to the coasting guide sys-
tem as guidance.
Unplug vehicle to start
(Plug-in hybrid)
This message is displayed when you
start the engine without unplugging
the charging cable. Unplug the
charging cable, and then start the
vehicle.
Remaining time (Plug-in hybrid)
This message is displayed to notify
the remaining time to fully charge the
battery.
Shift to P to charge(Plug-in hybrid)
This message is displayed when the
charging connector is plugged with
the shift lever in R (Reverse), N
(Neutral) or D (Drive). Move the shift
lever to P (Park) and re-start the
charging process.
Electric/Hybrid modes (Plug-in hybrid)
A corresponding message is dis-
played when a mode is selected by
pressing the HEV button.
Low battery. Maintaining Hybridmode (Plug-in hybrid)
This message is displayed when the
vehicle is unable to convert to EV
mode even when pressing the HEV
button during HEV mode driving due
to insufficient high-voltage (hybrid)
battery level.
Low battery temp. Maintainingcurrent (Plug-in hybrid)
This message is displayed when the
vehicle is unable to convert to EV
mode even when pressing the HEV
button during HEV mode driving due
to low battery temperature.
DRIVING THE HYBRID/PLUG-IN HYBRID VEHICLE (CONT.)

H29
Charger Error! (Plug-in hybrid)
This message is displayed when the
charging failed due to an external
charger error.
The purpose of this message is to let
you know the error has occurred in
the charger itself, not in the vehicle.
Low/High System temperatureMaintaining Hybrid mode (Plug-in hybrid)
This message is displayed when the
vehicle is unable to convert to EV
mode even when pressing the HEV
button during HEV mode driving due
to low/high system temperature.
Switching to Hybrid mode toallow heating or air conditioning(Plug-in hybrid)
When the coolant temperature is lower than 57 °F (-14 °C), and you
turn the climate control On for
heating, this message will be dis-
played in the cluster. Then, the
vehicle will automatically switch to
HEV mode.
When the coolant temperature is higher than 57 °F (-14 °C), or you
turn the climate control Off, the
vehicle will automatically return to
EV mode.
Wait until fuel door opens
(Plug-in hybrid)
This message is displayed when you
attempt to open the fuel filler lid with
the fuel tank pressurized. Wait until
the fuel tank is depressurized.
✽ ✽ NOTICE
• It may take up to 20 seconds to
open fuel filler lid.
• When the fuel filler lid is frozen and does not open after 20 seconds
at freezing temperature, slightly
tap the fuel filler lid and then
attempt to open it.

H30
Fuel door open (Plug-in hybrid)
This message is displayed when the
fuel filler lid is opened.
Also means "Ready to refuel".
Check fuel door (Plug-in hybrid)
This message is displayed when the
fuel filler lid is open or an abnormal-
ity has occurred.
Refuel after stopping (Plug-in hybrid)
This message is displayed when the
fuel filler lid open button is pressed
when a vehicle equipped with a plug-
in hybrid seal-type fuel tank is in
motion (vehicle speed is greater than
mi/h (0 km/h)).
Disconnect charging cable beforeopening fuel door (Plug-in hybrid)
This message is displayed when you
press the fuel filler lid open button
while charging.
The fuel lid will not open when the
charging cable is connected to the
vehicle.
Charging Door Open (Plug-in hybrid)
This message indicates that the
charging door is open while in driv-
ing-ready state to encourage you to
inspect and close the door.
(Driving with the charging door open
may result in moisture inflow or dam-
age. This message is used to prevent
such occurrences.)
DRIVING THE HYBRID/PLUG-IN HYBRID VEHICLE (CONT.)

H47
If a vehicle accident occurs:
1. Stop the vehicle and shift thetransmission into "P" position. And
then depress the parking brake.
2. Turn off the Hybrid system by pushing the Engine Start/Stop
Button.
3. Step away from the vehicle to a safe place.
4. Call emergency services for help and let them know the vehicle is a
Hybrid vehicle. If an immersion in water occurs:
If your vehicle was flooded and has
soaked carpeting or water on the
flooring, you should not try to start
the Hybrid system. Have the car
towed to an authorized Kia dealer.When the hybrid vehicle shuts
off
When the high voltage battery or 12-
volt battery discharges, or fuel tank is
empty, the hybrid system may not
operate.
If the Hybrid system stops operating
while the vehicle is moving, reduce
the vehicle speed gradually. Pull
your vehicle off the road to a safe
area, and shift the transmission in to
Park (P) position and;
1. Turn on the hazard warning flashers.
2. Set the start button at OFF, and try
to start the Hybrid system by
applying the brake pedal and
pushing the start button.
3. If the Hybrid system will not oper- ate, refer to “EMERGENCY
STARTING” in chapter 6.
Before you try to jump start the vehi-
cle, confirm the fuel level. If the fuel
level is low, add more fuel before
attempting an emergency start.
WARNING
If a submersion in water occurs:
If your vehicle was flooded and
has soaked carpeting or water
on the flooring, you should not
try to start the Hybrid system.
Never touch the high voltage
cables, connectors and pack-
age modules, because an elec-
trical shock may occur causing
injury or death. High Voltage
cables are orange in color.
In this case, have the vehicle be
towed to and inspected by an
authorized Kia dealer.

Introduction
Fuel requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• Gasoline containing alcohol and methanol . . . . . . . . . 1-2
• Do not use methanol . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
• Fuel additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• Operation in foreign countries . . . . . . . . . . . . . . . . . . . 1-4
Vehicle modifications . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Vehicle break-in process . . . . . . . . . . . . . . . . . . . . . 1-5
HEV/PHEV powertrain . . . . . . . . . . . . . . . . . . . . . . 1-5
Vehicle data collection and event data recorders. . 1-6
1

Introduction
21
Your new vehicle is designed to use
only unleaded fuel having a pump
octane number ((R+M)/2) of 87
(Research Octane Number 91) or
higher. (Do not use methanol blend-
ed fuels.)
Your new vehicle is designed to
obtain maximum performance with
UNLEADED FUEL, as well as mini-
mize exhaust emissions and spark
plug fouling.
Never add any fuel system cleaning
agents to the fuel tank other than
what has been specified. (Consult an
authorized Kia dealer for details.)
• Tighten the cap until it clicks onetime, otherwise the Check Engine light will illuminate.
Gasoline containing alcohol and
methanol
Gasohol, a mixture of gasoline and
ethanol (also known as grain alco-
hol), and gasoline or gasohol con-
taining methanol (also known as
wood alcohol) are being marketed
along with or instead of leaded or
unleaded gasoline. Pursuant to EPA regulations, ethanol
may be used in your vehicle.
Do not use gasohol containing more
than 15% ethanol, and do not use
gasoline or gasohol containing any
methanol. Ethanol provides less
energy than gasoline and it attracts
water, and it is thus likely to reduce
your fuel efficiency and could lower
your MPG results.
Methanol may cause drivability prob-
lems 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 prob-
lems may not be covered by the
manufacturer’s warranty if they result
from the use of:
1. Gasoline or gasohol containing
methanol.
2. Leaded fuel or leaded gasohol.
3. Gasohol containing more than 15% ethanol.
WARNING - Refueling
• Do not "top off" after the noz- zle automatically shuts off.
Attempts to force more fuel
into the tank can cause fuel
overflow onto you and the
ground causing a risk of fire.
Always check that the fuel cap is installed securely to pre-
vent fuel spillage, especially
in the event of an accident.
FUEL REQUIREMENTS