Auto User Guide

Fuel Requirements of Hyundai Elantra 2023 | Tips and Technique

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Fuel Requirements of Hyundai Elantra 2023 | Tips and Technique

The Hyundai Elantra 2023 is a state-of-the-art car that combines performance, safety, and style to provide the best possible driving experience. Utilizing Hyundai Genuine Parts and being aware of your Elantra’s fuel requirements are essential for maintaining its dependability and efficiency. The purpose of this introduction is to clarify the key elements of the car’s fuel requirements while highlighting the significance of following suggested practices and using original Hyundai components to ensure both performance and safety. Continue reading to learn the essential details that will help your Hyundai Elantra 2023 last a long time and perform at its best.

2023 Hyundai Elantra Specs, Price, Features, Milage (Brochure)


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 Pages 2-13 in the Vehicle Specifications section of the Owner’s Manual.
Copyright 2022 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.


  1.  What are HYUNDAI Genuine Parts?
    HYUNDAI Genuine Parts are the same parts used by HYUNDAI Motor Company to manufacture vehicles. They are designed and tested for the optimum safety, performance, and reliability for our customers.
    Hyundai Elantra 2023 Introduction03
  2. Why Hyundai Genuine Parts?
    HYUNDAI Genuine Parts are engineered and built to meet rigid manufacturing requirements. Damage caused by using imitation, counterfeit, or used salvage parts is not covered under the HYUNDAI New Vehicle Limited Warranty or any other HYUNDAI warranty.
    In addition, any damage to or failure of HYUNDAI Genuine Parts caused by the installation or failure of an imitation, counterfeit, or used salvage part is not covered by any HYUNDAI Warranty.
    Hyundai Elantra 2023 Introduction02
  3. How can you tell if you are purchasing HYUNDAI Genuine Parts?
    Look for the HYUNDAI Genuine Parts Logo on the package (see below).
    HYUNDAI Genuine Parts exported to the U.S. are packaged with labels written only in English.
    HYUNDAI Genuine Parts are only sold through authorized HYUNDAI Dealerships.

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We want to help you get the greatest possible driving pleasure from your vehicle. Your Owner’s Manual can assist you in many ways. To gain an overview of the contents of your Owner’s Manual, use the Table of Contents at the front of the manual. The first page of each Chapter includes a detailed Table of Contents of the topics in that Chapter.
To quickly locate information about your vehicle, use the Index in the back of the manual. It is an alphabetical list of what is in this manual and the page number where it can be found.
For your convenience, we have incorporated tabs on the right-hand page edges. These tabs are coded with the Chapter titles to assist you with navigating through the manual.


Your safety, and the safety of others, is very important. This Owner’s
The manual provides you with many safety precautions and operating procedures. This information alerts you to potential hazards that may hurt you or others, as well as cause damage to your vehicle.
Safety messages found on vehicle labels and in this manual describe these hazards and what to do to avoid or reduce the risks.
Warnings and instructions contained in this manual are for your safety. Failure to follow safety warnings and instructions can lead to serious injury or death.

Throughout this manual DANGER, WARNING, CAUTION, NOTICE and the SAFETY ALERT SYMBOL will be used.

Hyundai Elantra 2023 Introduction04This is the safety alert symbol. It is used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. The safety alert symbol precedes the signal words DANGER, WARNING, and CAUTION.

Hyundai Elantra 2023 Introduction05

DANGER indicates a hazardous situation that, if not avoided, will result in death or serious injury.

Hyundai Elantra 2023 Introduction05

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

Hyundai Elantra 2023 Introduction06 CAUTION
CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

NOTICE indicates a situation which, if not avoided, could result in vehicle damage.


Hyundai Elantra fuel recommendations

Your new vehicle is designed to obtain maximum performance with UNLEADED FUEL, as well as minimize exhaust emissions and spark plug fouling.
Your new vehicle is designed to perform optimally using 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.

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  • Do not “top off” after the nozzle automatically shuts off when refuelling.
  • Always check that the fuel cap is installed securely to prevent fuel spillage in the event of an accident.

Gasoline containing alcohol or methanol
Gasohol, a mixture of gasoline and ethanol (also known as grain alcohol) is being marketed along with or instead of leaded or unleaded gasoline. 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 damage to the fuel system, engine control system, and emission control system.
Discontinue using gasohol of any kind if drivability problems occur.
“E85” fuel is an alternative fuel comprised of 85 per cent ethanol and 15 per cent gasoline and is manufactured exclusively for use in Flexible Fuel Vehicles. “E85” is not compatible with your vehicle. Use of “E85” may result in poor engine performance and damage to your vehicle’s engine and fuel system. HYUNDAI recommends that customers do not use fuel with an ethanol content exceeding 15 per cent.

To prevent damage to your vehicle’s engine and fuel system:

Fueling Tips

  • Never use gasohol which contains 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 performance problems caused by the use of “E85” fuel.

Using Fuel-saving techniques (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, damage to the catalyst, or abnormal corrosion, 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 performance 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 emission control system.
The malfunctioning indicator lamp on the cluster may come on.

Detergent Fuel Additives

 Hyundai Elantra 2023 fuel type recommends that you use good quality gasoline treated with detergent additives such as TOP TIER Detergent Gasoline, which helps in your Engine Care and prevents deposit formation in the engine. These gasolines will help the engine run cleaner and enhance the performance of the Emission Control System. For more information on TOP TIER Detergent Gasoline, please go to the website (www.
For customers who do not use TOP Tier Detergent Gasoline regularly, and have problems starting or the engine does not run smoothly, detergent-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 according to the maintenance schedule is recommended (refer to the Maintenance Schedule in Chapter 8).
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 modified.
    Modification of your vehicle could affect its performance, safety, or durability and may even violate governmental safety and emissions regulations.
    In addition, damage or performance 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, economy, and life of your vehicle.

  • Do not race the engine.
  • While driving, avoid sudden acceleration and stop.
  • Do not maintain a single speed for long periods, either fast or slow. Varying engine speed is needed to properly break in the engine.
  • Fuel economy and engine performance may vary depending on the vehicle break-in process and be stabilized after 4,000 miles (6,000 km). New engines may consume more oil during the vehicle break-in period.
  • Avoid hard stops, except in emergencies, to allow the brakes to sit properly.
  • Do not tow a trailer during the first 1,200 miles (2,000 km) of operation.

Hyundai Elantra 2023 Introduction05

Items contained in motor vehicles or emitted from them are known to the State of California to cause cancer and birth defects or reproductive harm. These include:

  • Gasoline and its vapors
  • Engine exhaust
  • Used engine oil
  •  Interior passenger compartment components and materials
  • Parts that are subject to heat and wear

In addition, battery posts, terminals, and related accessories contain lead, lead compounds, and other chemicals known to the State of California to cause cancer and reproductive harm.
For more information go to



This vehicle is equipped with an event data recorder (EDR). The main purpose of an EDR is to record, in certain crashes or near crash-like situations, such as an airbag deployment or hitting a road obstacle, data that will assist in understanding how a vehicle’s systems performed. The EDR is designed to record data related to vehicle dynamics and safety systems for a short period, typically 30 seconds or less. The EDR in this vehicle is designed to record such data as:

  • How various systems in your vehicle were operating;
  • Whether or not the driver and passenger safety belts were buckled/fastened;
  • How far (if at all) the driver was depressing the accelerator and/or brake pedal; and,
  • How fast the vehicle was travelling.
    These data can help provide a better understanding of the circumstances in which crashes and injuries occur. NOTE: EDR data is recorded by your vehicle only if a non-trivial crash situation occurs; no data are recorded by the EDR under normal driving conditions and no personal data (for example, name, gender, age, and crash location) are recorded. However, other parties, such as law enforcement, could combine the EDR data with the type of personally identifying data routinely acquired during a crash investigation.
    To read data recorded by an EDR, special equipment is required, and access to the vehicle or the EDR is needed. In addition to the vehicle manufacturer, other parties, such as law enforcement, that have the special equipment, can read the information if they have access to the vehicle or the EDR.


What type of fuel does the Hyundai Elantra 2023 require?

The Hyundai Elantra 2023 is designed to run on regular unleaded gasoline with an octane rating of 87 or higher.

Can I use E85 or other ethanol blends in my Hyundai Elantra 2023?

No, it is recommended to use regular unleaded gasoline. Using ethanol blends like E85 may damage the engine and void the warranty.

How often should I refuel my Hyundai Elantra 2023?

The frequency of refuelling depends on driving habits and conditions, but on average, you should refuel when the fuel gauge drops to around a quarter of a tank.

Is it normal for the fuel efficiency to vary under different driving conditions?

Yes, factors such as driving conditions, traffic, and load can affect fuel efficiency. It’s normal to experience variations in fuel economy.

Can I mix different octane ratings of gasoline in my Hyundai Elantra 2023?

It’s recommended to use a consistent octane rating, but if needed, you can mix different octane ratings. However, it’s best to use the recommended octane for optimal performance.

How can I improve fuel efficiency in my Hyundai Elantra 2023?

Regular maintenance, proper tyre inflation, and smooth driving habits can contribute to improved fuel efficiency.

What should I do if I accidentally use the wrong type of fuel?

If you accidentally use the wrong fuel, do not start the engine. Contact a Hyundai service centre for assistance.

Does the Hyundai Elantra 2023 have a fuel filter that needs regular replacement?

Yes, the Hyundai Elantra 2023 is equipped with a fuel filter that may require periodic replacement. Refer to the owner’s manual for the recommended maintenance schedule.

Can I use fuel additives in my Hyundai Elantra 2023?

It is not necessary to use fuel additives, and some may even damage the engine. Stick to using high-quality gasoline meeting the recommended specifications.

Is it safe to store extra fuel containers in the trunk of my Hyundai Elantra 2023?

It is not recommended to store extra fuel containers in the trunk due to safety concerns. Store them in a well-ventilated area outside the vehicle.

What safety precautions should I take while refuelling?

Turn off the engine, avoid smoking, and stay outside the vehicle while refuelling. Follow proper fueling station safety guidelines.

Can I tow a trailer with my Hyundai Elantra 2023 without affecting fuel efficiency?

Towing a trailer will likely reduce fuel efficiency. Be aware of the vehicle’s towing capacity and expect changes in fuel economy when towing.

What should I do if the fuel cap warning light comes on?

If the fuel cap warning light illuminates, check and tighten the fuel cap. If the light persists, have the system inspected at a Hyundai service centre.

Are there any special considerations for driving in extreme temperatures regarding fuel consumption?

Extreme temperatures can affect fuel economy. In cold weather, allow the engine to warm up before driving, and in hot weather, use air conditioning judiciously to optimize fuel efficiency.

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