2018 Hyundai Ioniq Plug-in Hybrid fuel

F2
Your HYUNDAI should not be modified in any way.
Such modifications may adversely affect the per-
formance, safety or durability of your HYUNDAI
and may, in addition, violate conditions of the limit-
ed warranties covering the vehicle. Certain modifi-
cations may also be in violation of regulations
established by the U.S. Department of
Transportation and other federal or state agencies.
Your vehicle is equipped with electronic fuel injec-
tion 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 TOYOUR HYUNDAI
TWO-WAY RADIO OR CELLULARTELEPHONE INSTALLATION
This manual includes information titled as DAN-
GER, WARNING, CAUTION and NOTICE.
These titles indicate the following:
SAFETY AND VEHICLE DAMAGE WARNING
DANGER indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
DANGER
WARNING indicates a hazardous situation
which, if not avoided, could result in death
or serious injury.
CAUTION indicates a hazardous situation
which, if not avoided, could result in minor or
moderate injury.
CAUTION
NOTICE indicates a situation which, if not
avoided, could result in vehicle damage.
NOTICE
WARNING

F4
INTRODUCTION
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 construc-
tion 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 impor-
tant operating, safety and maintenance information.
HYUNDAI MOTOR AMERICA
Copyright 2017 HYUNDAI Motor America. 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 America.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 8-7 in the Vehicle Specifications section of the Owner's Manual.
CAUTION

F7
Introduction
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NOTICE indicates a situation
which, if not avoided, could result
in vehicle damage. Your new vehicle is designed to
obtain maximum performance with
UNLEADED FUEL, as well as mini-
mize exhaust emissions and spark
plug fouling.
Your new vehicle is designed to use
only unleaded fuel having an octane
number ((R+M)/2) of 87 (Research
Octane Number 91) or higher. (Do not
use methanol blended fuels)
To prevent damage to the engine
and engine components, never
add any fuel system cleaning
agents to the fuel tank other than
what has been specified.
Consult an authorized HYUNDAI
dealer for additional information.
Gasoline containing alcohol or
methanol
Gasohol, a mixture of gasoline and
ethanol (also known as grain alco-
hol) are being marketed along with or
instead of leaded or unleaded gaso-
line. For example, "E15" is a gasohol
comprised of 15% ethanol and 85%
gasoline.
Do not use gasohol containing more
than 15% 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 con-
trol system and emission control sys-
tem.
Discontinue using gasohol of any
kind if drivability problems occur.
NOTICE
NOTICE
CAUTION indicates a hazardous
situation which, if not avoided,
could result in minor or moder-
ate injury.
CAUTION
•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

F8
Introduction
"E85" fuel is an alternative fuel com-
prised of 85 percent ethanol and 15
percent gasoline, and is manufac-
tured exclusively for use in Flexible
Fuel Vehicles. "E85" is not compati-
ble with your vehicle. Use of "E85"
may result in poor engine perform-
ance and damage to your vehicle's
engine and fuel system. HYUNDAI
recommends that customers do not
use fuel with an ethanol content
exceeding 15 percent.
To prevent damage to your vehicle’s
engine and fuel system:
Never use gasohol which con- tains methanol.
Never use gasohol containing more than 15% ethanol.
Never use leaded fuel or leaded gasohol.
Never use "E85" fuel.
Your New Vehicle Limited
Warranty does not cover damage
to the fuel system or any perform-
ance problems caused by the use
of "E85" fuel.
Using Fuel Additives (except Detergent Fuel Additives)
Using fuel additives such as:
- Silicone 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.
- The Malfunction Indicator Lamp
(MIL) may illuminate.
Damage to the fuel system or per-
formance problem caused by the
use of these fuels or fuel additives
may not be covered by your New
Vehicle Limited Warranty.
Gasoline containing MMT
Some gasoline contains harmful
manganese-based fuel additives
such as
MMT (Methylcyclopentadienyl
Manganese Tricarbonyl
).
HYUNDAI does not recommend the
use of gasoline containing MMT.
This type of fuel can reduce vehicle
performance and affect your emis-
sion control system.
The malfunction indicator lamp on
the cluster may come on.
Detergent Fuel Additives
HYUNDAI recommends that you use
good quality gasolines treated with
detergent additives such as TOP TIER
Detergent Gasoline, which help pre-
vent deposit formation in the engine.
These gasolines will help the engine
run cleaner and enhance performance
of the Emission Control System. For
more information on TOP TIER
Detergent Gasoline, please go to the
website (www
.toptiergas.com).
NOTICE
NOTICE

F9
Introduction
For customers who do not use TOP
Tier Detergent Gasoline regularly,
and have problems starting or the
engine does not run smoothly, deter-
gent-based fuel additives that you
can purchase separately may be
added to the gasoline. If TOP TIER
Detergent Gasoline is not available,
one bottle of additive added to the
fuel tank at every 7,500 miles or 12
months is recommended.
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. This vehicle should not be modi-
fied. Modification of your vehicle
could affect its performance, safety
or durability and may even violate
governmental safety and emis-
sions regulations.
In addition, damage or perform-
ance problems resulting from any
modification may not be covered
under warranty.
If you use unauthorized electronic devices, it may cause the vehicle to
operate abnormally, wire damage,
battery discharge and fire. For your
safety, do not use unauthorized
electronic devices. By following a few simple precautions
for the first 600 miles (1,000 km) you
may add to the performance, econo-
my and life of your vehicle.
Do not race the engine.
While driving, keep your engine
speed (rpm, or revolutions per
minute) between 2,000 rpm and
4,000 rpm.
Do not maintain a single speed for long periods of time, either fast or
slow. Varying engine speed is need-
ed to properly break-in the engine.
Avoid hard stops, except in emer- gencies, to allow the brakes to seat
properly.
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1-3
Your vehicle at a glance
1
1. Door lock ................................................3-9
2. Fuel filler door ......................................3-48
3. Antenna ..................................................4-2
4. Rear combination lamp ........................7-61
5. High mounted stop lamp ......................7-646. Liftgate ..................................................3-46
7. Rearview camera ................................3-125
8. Rear parking assist system ................3-126
9. Towing hook ..........................................6-41
OAE016002
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Rear view
The actual shape may differ from the illustration.

1-4
Your vehicle at a glance
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1. Door lock/unlock button ........................3-10
2. Driver position memory system ............3-14
3. Side view mirror control switch ..............3-35
4. Central door lock switch ........................3-11
5. Power window switches ........................3-37
6. Power window lock switch......................3-40
7. Instrument panel illumination control
switch ....................................................3-56
8. Blind Spot Detection (BSD) System ......5-34
9. Lane Keeping Assist System (LKAS) ....5-56
10. ESC (Electronic Stability Control) OFF button ..........................................5-28
11. Fuel filler door open switch ..................3-48
12. 12V battery reset switch ........................6-5
13. Fuse panel ..........................................7-50
14. Steering wheel ....................................3-16
15. Steering wheel tilt/telescope lever ......3-16
16. Seat........................................................2-4
17. Hood release lever ..............................3-45
OAE017003N
The actual shape may differ from the illustration.

1-8
Your vehicle at a glance
1. Door lock ................................................3-9
2. Fuel filler door ......................................3-51
3. Antenna ..................................................4-2
4. Rear combination lamp ........................7-61
5. High mounted stop lamp ......................7-646. Liftgate ..................................................3-46
7. Rearview camera ................................3-125
8. Rear parking assist system ................3-126
9. Towing hook ..........................................6-41
OAEPH016002
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Rear view
The actual shape may differ from the illustration.