2018 Hyundai Sonata Gas Tank Size

All 2018 Hyundai Sonatas have a gas tank capacity of 18.5 gallons, regardless of their trim level.
Written by Liz Jenson
Reviewed by Brenna Swanston
The 2018 Hyundai Sonata comes with a gas tank that has a total capacity of 18.5 gallons in all trim levels.
Knowing your car’s gas tank size can be helpful, particularly if you’re planning out a long road trip or budgeting for the month. But just how much gas can a 2018 Hyundai Sonata hold?
, the
super app
that saves drivers time and money on
car insurance
, has created a guide to your Hyundai’s gas tank. We’ll discuss your car’s fuel capacity as well as ways to measure your gas tank and ways to save on fuel and
Hyundai car insurance costs
Make safe driving pay
Get rewarded for safe driving. Earn points and unlock benefits. Totally free.
Start earning now

How big is the gas tank on a 2018 Hyundai Sonata?

Regardless of the exact trim level you choose, the 2018 Hyundai Sonata will come with an 18.5-gallon gas tank. This gives the 2018 Sonata a full range of 574 miles before you’ll need to visit a gas station.

How to check your Hyundai Sonata’s gas tank size yourself.

There are a couple of different ways to check the size of your vehicle’s gas tank at home:

Drive your car until your tank is empty, then fill it up

This may not be the most scientific way to figure out how much gas your Hyundai can hold, but it can give you a general idea. Simply drive your car until your fuel gauge has reached E. Then, head to the gas station and fill up your tank.
The number of gallons of gas listed on the pump after you finish filling up should be close to the total capacity of your fuel tank. But be cautious when using this method.

Use some basic math

That’s right, we’re going back to geometry class. First, measure the length, width, and height of your fuel tank in inches. Then, multiply these numbers together to get the total volume of the tank. Finally, divide the result by 231, or the number of cubic inches in a gallon.

Look in your owner’s manual

This may be the easiest way to check the size of your fuel tank. Simply grab your owner’s manual and check the index for words like fuel or gas. Somewhere in the manual, you should find a measurement for your vehicle’s fuel tank capacity.
rating reverse-full
"I’m earning
awesome rewards
every week, just for driving safe!”

Saving on Hyundai fuel costs

Whether you’re planning a big trip or just looking to lower your car expenses, saving money on fuel costs is a great place to start. There are a couple of things you can do to reduce the amount of fuel you use in your daily life.
  1. Set (and maintain) a
    basic car maintenance schedule
    to keep your vehicle in good working order.
  2. Try not to get overzealous with the accelerator. Instead, aim to coast to a stop when possible.
  3. Don’t let your car idle, especially in the cold. Idling wastes gas, especially when your vehicle has to work hard to keep the engine warm.

Saving on Hyundai car insurance

Saving on fuel is all well and good, but there are plenty of other areas where you can cut costs on car expenses, too. Saving on
Hyundai Sonata car insurance
, for example, has never been easier— just use
With this app, you can find the best rates available on the coverage you need in a matter of minutes. Simply download the app on your phone and take a 45-second survey to tell Jerry about your needs. Then, this licensed insurance broker will perform a comprehensive cross-analysis of over 55
car insurance
providers to find the policy that works best for you.
The whole process takes less than a minute, and the average user saves close to $900 per year.
“I was literally floored by the savings
found for me. I was paying close to $960 every 6 months and now I’m paying $380 every six months for IDENTICAL COVERAGE in North Carolina!” —Olivia Z.
Are you overpaying for your car insurance?
Compare quotes and find out in 45 seconds.
No spam or unwanted phone calls · No long forms
No spam or unwanted phone calls · No long forms · No fees
icon4.717k Ratings
5M+Drivers Joined
7M+Cars Garaged
Are you overpaying for car insurance?
Compare quotes and find out in 45 seconds.
Try Jerry

Easiest way to compare and buy car insurance

No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
Find insurance savings