2018 Hyundai Ioniq Hybrid fuel

F2
Your HYUNDAI should not be modified in any way. Such modifications may adversely affect
the performance, safety or durability of your HYUNDAI and may, in addition, violate condi-
tions of the limited warranties covering the vehicle. Certain modifications may also be in vio-
lation of regulations established by the Department of Transportation and other government
agencies in your country.
Your vehicle is equipped with electronic fuel injection and other electronic components. It is
possible for an improperly installed/adjusted two-way radio or cellular telephone to adversely
affect electronic systems. For this reason, we recommend that you carefully follow the radio
manufacturer's instructions or consult your HYUNDAI dealer for precautionary measures or
special instructions if you choose to install one of these devices.
CAUTION: MODIFICATIONS TO YOUR HYUNDAI
TWO-WAY RADIO OR CELLULAR TELEPHONE INSTALLATION

F4
FOREWORD
Congratulations, and thank you for choosing HYUNDAI.We are pleased to welcome you to the growing number of dis-
tinguished people who drive HYUNDAIS.We are very proud of the advanced engineering and high-quality construction
of each HYUNDAI we build.
Your Owner’s Manual will introduce you to the features and operation of your new HYUNDAI. To become familiar with
your new HYUNDAI, so that you can fully enjoy it, read this Owner’s Manual carefully before driving your new vehicle.
This manual contains important safety information and instructions intended to familiarize you with your vehicle’s con-
trols and safety features so you can safely operate your vehicle.
This manual also contains information on maintenance designed to enhance safe operation of the vehicle. It is recom-
mended that all service and maintenance on your car be performed by an authorized HYUNDAI dealer.HYUNDAI deal-
ers are prepared to provide high-quality service, maintenance and any other assistance that may be required.
This Owner’s Manual should be considered a permanent part of your vehicle, and should be kept in the vehicle so you
can refer to it at any time. The manual should stay with the vehicle if you sell it to provide the next owner with important
operating, safety and maintenance information.
HYUNDAI MOTOR COMPANY
Copyright 2017 HYUNDAI Motor Company. All rights reserved. No part of this publication may be reproduced, stored
in any retrieval system or transmitted in any form or by any means without the prior written permission of HYUNDAI
Motor Company.Severe engine and transmission damage may result from the use of poor quality fuels and lubricants that
do not meet HYUNDAI specifications. You must always use high quality fuels and lubricants that meet the
specifications listed on Page 8-6 in the Vehicle Specifications section of the Owner's Manual.
CAUTION

F6
Introduction
NOTICE indicates a situation
which, if not avoided, could result
in vehicle damage.
Unleaded
For Europe
For the optimal vehicle performance,
we recommend you use unleaded
gasoline which has 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 per-
formance reduction of the vehicle. (Do
not use methanol blended fuels)
Except Europe
Your new vehicle is designed to use
only unleaded fuel having an Octane
Rating of RON (Research Octane
Number) 91 / AKI (Anti-Knock Index)
87 or higher. (Do not use methanol
blended 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 USE LEADED FUEL. The
use of leaded fuel is detrimental to
the catalytic converter and will
damage the engine control sys-
tem’s oxygen sensor and affect
emission control.
Never add any fuel system clean-
ing agents to the fuel tank other
than what has been specified (We
recommend that you consult an
authorized HYUNDAI dealer for
details.)
NOTICE
NOTICE
•Do not "top off" after the noz-
zle automatically shuts off
when refueling.
•Always check that the fuel cap
is installed securely to pre-
vent fuel spillage in the event
of an accident.
WARNING
CAUTION indicates a hazardous
situation which, if not avoided,
could result in minor or moder-
ate injury.
CAUTION
FUEL REQUIREMENTS

F7
Introduction
Leaded (if equipped)
For some countries, your vehicle is
designed to use leaded gasoline.
When you are going to use leaded
gasoline, we recommend that you
ask an authorized HYUNDAI dealer.
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 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.
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 problems and dam-
age to the fuel system, engine control
system and emission control system.
Discontinue using gasohol of any
kind if drivability problems occur.Vehicle damage or driveability prob-
lems may not be covered by the
manufacturer’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.
Never use gasohol which contains
methanol. Discontinue use of any
gasohol product which impairs
drivability.
Other fuels
Using fuel additives such as:
- Silicone fuel additive
- MMT (Magnanese, Mn) fuel additive
- Ferrocene (iron-based) fuel additive
- Other metallic-based fuel additives
may result in cylinder misfire, poor
acceleration, engine stalling, dam-
age to the catalyst, or abnormal cor-
rosion, and may cause damage to
the engine resulting in a reduction in
the overall life of the powertrain.
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.
NOTICE
NOTICE

F8
Introduction
Use of MTBE
HYUNDAI recommends avoiding
fuels containing 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 reduce vehicle performance and
produce vapor lock or hard starting.
Your New Vehicle Limited
Warranty may not cover damage
to the fuel system and any per-
formance problems that are
caused by the use of fuels con-
taining methanol or fuels contain-
ing MTBE (Methyl Tertiary Butyl
Ether) over 15.0% vol. (Oxygen
Content 2.7% weight.)
Do not use methanol
Fuels containing methanol (wood
alcohol) should not be used in your
vehicle.This type of fuel can reduce
vehicle performance and damage
components of the fuel system, engine
control system and emission control
system.
Fuel Additives
HYUNDAI recommends that you use
unleaded gasoline which has an
octane rating of RON (Research
Octane Number) 95 / AKI (Anti Knock
Index) 91 or higher (for Europe) or
Octane Rating of RON (Research
Octane Number) 91 / AKI (Anti-Knock
Index) 87 or higher (except Europe).
For customers who do not use good
quality gasolines, and have problems
starting or the engine does not run
smoothly, one bottle of additive added
to the fuel tank is recommended
according to the maintenance sched-
ule (refer to chapter 7, “Normal
Maintenance Schedule”).
Additives are available from your
authorized HYUNDAI dealer along
with information on how to use them.
Do not mix other additives.
Operation in foreign countries
If you are going to drive your vehicle
in another country, be sure to:
• Observe all regulations regarding
registration and insurance.
• Determine that acceptable fuel is
available.
NOTICE

H2
HEV (HYBRID ELECTRIC VEHICLE) SYSTEM
Hybrid Vehicle
The HYUNDAI Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the electric motor for power. The elec-
tric 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 bat-
tery.
The HEV battery charge must be maintained, so at times the engine will come on even at idle to act as a generator.
Charging also occurs when decelerating or by regenerative braking.
OAE056066 Startup/Low speed cruise
Electric motor
Acceleration
Electric motor + Engine
High speed cruise
Engine
Deceleration
Charging
Stop
Engine OFF

H29
What Does Regenerative
Braking Do?
It uses an electric motor when decel-
erating and when braking and trans-
forms kinetic energy to electrical
energy in order to charge the high
voltage battery.
Battery
• Hybrid
- The vehicle is composed of a
high voltage battery that drives
the motor and air conditioner, and
an integrated 12V lithium ion
polymer battery with the HEV
battery that drives the lamps,
wipers, and audio system.
- The integrated 12V battery is auto-
matically charged when the vehicle
is in the ready ( ) mode.
• Plug-in hybrid vehicle
- The vehicle is composed of a
highvoltage battery that drives
the motor and air-conditioner,
and an auxiliary battery (12 V)
that drives the lamps, wipers, and
audio system.
- The auxiliary battery is automati-
cally charged when the vehicle is
in the ready ( ) mode.
Hybrid System Gauge
The hybrid system gauge indicates
whether the current driving condition
is fuel efficient or not.
• CHARGE :
Shows that the energy made by
the vehicle is being converted
to electrical energy. (Regenerated
energy)
• ECO :
Shows that the vehicle is being
driven in an Eco-friendly manner.
• POWER :
Shows that the vehicle is exceeding
the Eco-friendly range.According to the hybrid system
gauge area, the "EV" indicator comes
on or off.
- "EV" indicator ON : Vehicle is driven
using the electric motor or the
gasoline engine is stopped.
- "EV" indicator OFF : Vehicle is driv-
en using the gasoline engine.
OAEQ046008

H36
Stop vehicle and check power
supply
This message is displayed when a
failure occurs in the power supply
system.
In this case, park the vehicle in a
safe location and we recommend
that you tow your vehicle to the near-
est authorized HYUNDAI dealer and
have the vehicle inspected.
Stop vehicle to charge battery
This message is displayed when the
hybrid battery power (SOC) level is
low.
In this case, park the vehicle in a
safe location and wait until the hybrid
battery is charged.
You can increase the hybrid battery
charging rate by holding the acceler-
ator pedal to the floor with transmis-
sion in P. The engine will rev high but
it will be limited for charging purpose
when you hold the pedal to the floor.
Refuel to prevent Hybrid battery
damage
This message is displayed when the
fuel tank is nearly empty.
You should refill the fuel tank to pre-
vent hybrid battery damage.
OLFH044232L
OLFH044242L
DRIVING THE HYBRID/PLUG-IN HYBRID VEHICLE (CONT.)
OLFH044230L