The Hyundai Ioniq does 55.5 mpg combined (55.2 city, 55.8 highway), which works out to about $692 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 1.6L 4-cyl Hybrid does 58.3 mpg while 1.6L 4-cyl Plug-in hybrid does 52 — a difference of $79 a year. Against other Hybrid cars it sits above the average of 29.8 mpg.
Every Hyundai Ioniq engine, compared
Gas mileage on the Hyundai Ioniq ranges from 58.3 down to 52 depending on which engine sits under the bonnet — a spread of $79 a year across 2 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 1.6L 4-cyl Hybrid | 57.3 / 59.3 | 2017–2022 | $659 | |
| 1.6L 4-cyl Plug-in hybrid | 52.6 / 51.6 | 2018–2022 | $738 |
What that actually costs
The Hyundai Ioniq burns a gallon every 55.5 miles, so 12,000 miles takes about 216 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.058 |
| Fuel per year | $692 |
| Fuel over five years | $3,460 |
| Against other Hybrid cars | −$597 a year |
| EPA's own estimate | $1,118 a year |
City or highway — who is this car for
The Hyundai Ioniq gives up 0.6 mpg the moment you leave the motorway — 55.8 out there against 55.2 in town, a 1% drop worth $8 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 55.2 mpg | $696 a year if you only drive in town |
| Highway | 55.8 mpg | $688 a year if you mostly commute |
| Gap | +0.6 mpg (1%) | Narrow — equally happy either way |
How the Ioniq changed over the years
The Ioniq peaked in 2017 at 58 mpg (57 city, 59 highway) and was at its thirstiest in 2020 at 55 — 3 mpg apart, or $36 a year in fuel between buying one year and the other. The 2022 car does 55.5. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2022 | 55 / 55.5 | 2 | $692 | |
| 2021 | 55 / 55.5 | 2 | $692 | |
| 2020 | 55 / 55.5 | 2 | $698 | |
| 2019 | 55 / 55.5 | 2 | $698 | |
| 2018 | 55 / 55.5 | 2 | $698 | |
| 2017 | 57 / 59 | 1 | $662 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 11 EPA ratings of the Hyundai Ioniq — 2 engines across 2017–2022. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $1,118. Full method.
Frequently asked questions
What mpg does the Hyundai Ioniq get?
55.5 mpg combined on average — 55.2 in the city and 55.8 on the highway, per EPA ratings across 2017–2022.
How much does a Hyundai Ioniq cost in fuel per year?
About $692 at 12,000 miles and $3.20 a gallon — roughly $3,460 over five years, or 0.058 dollars a mile.
Which Ioniq engine is the most economical?
The 1.6L 4-cyl Hybrid at 58.3 mpg, against 52 for the 1.6L 4-cyl Plug-in hybrid — a difference of about $79 a year.
Is the Ioniq good on fuel compared with similar cars?
Against other Hybrid cars it sits above the average of 29.8 mpg, computed across 1162 ratings.
Are these real-world Ioniq figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Hyundai Ioniq is $1,118 against the $692 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 59 and 52 mpg versions of this car is smaller than the spread between two drivers of the same one.
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