Against 247 other V6 cars rated 2024–2026, the G90 sits right on their 21 mpg average. Averaged over the years each was sold, the most economical engine since 2017, the 3.5L 6-cyl (2023–2026), does 21 mpg and the thirstiest, the 5L 8-cyl (2017–2022), 19: $192 a year apart.
Every Genesis G90 engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3.5L 6-cyl | 18 / 26 | 2023–2026 | $1,829 | |
| 3.3L 6-cyl | 17 / 24.2 | 2017–2022 | $1,920 | |
| 3.5L 6-cyl Hybrid | 17 / 24 | 2023–2026 | $1,920 | |
| 5L 8-cyl | 16 / 24 | 2017–2022 | $2,021 |
What that actually costs
Against its rivals in the same model years, the Dodge Charger gets 20 mpg, the Kia K5 30 mpg and the Porsche Panamera 20.3 mpg, next to 20.5 mpg for the 2026 G90.
| Measure | Value |
|---|---|
| Cost per mile (2026) | $0.156 |
| Fuel per year | $1,873 |
| Fuel over five years | $9,365 |
| Against other V6 cars, 2024–2026 | +$44 a year |
| EPA's own estimate | $3,870 a year |
City or highway — who is this car for
The 2026 Genesis G90 gives up 7.5 mpg in town: 25 on the highway against 17.5 in the city, $658 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2026) | 17.5 mpg | $2,194 a year if you only drive in town |
| Highway | 25 mpg | $1,536 a year if you mostly commute |
| Gap | +7.5 mpg (43%) | Wide — this car dislikes traffic |
How the G90 changed over the years
The G90 peaked in 2026 at 20.5 mpg (17.5 city, 25 highway) and was at its thirstiest in 2022 at 19.5 — 1 mpg apart, or $96 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 17.5 / 25 | 2 | $1,873 | |
| 2025 | 17.5 / 25 | 2 | $1,873 | |
| 2024 | 17.5 / 25 | 2 | $1,873 | |
| 2023 | 17.5 / 25 | 2 | $1,873 | |
| 2022 | 16.5 / 24 | 2 | $1,969 | |
| 2021 | 16.5 / 24 | 2 | $1,969 | |
| 2020 | 16.5 / 24.5 | 2 | $1,969 | |
| 2019 | 16.5 / 24 | 2 | $1,969 | |
| 2018 | 16.5 / 24 | 2 | $1,969 | |
| 2017 | 16.5 / 24 | 2 | $1,969 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 20 EPA ratings of the Genesis G90 — 4 engines across 2017–2026. 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 $3,870. Full method.
Frequently asked questions
What mpg does the 2026 Genesis G90 get?
20.5 mpg combined, 17.5 city and 25 highway, per EPA. Across every year since 2017 the G90 has averaged 19.9 mpg.
Is the 2026 G90 more efficient than the 2025?
About the same: 20.5 against 20.5 mpg combined.
Which G90 year has the best gas mileage?
The 2026, at 20.5 mpg combined (17.5 city, 25 highway), which is also the latest model year we hold.
Does the G90 get better gas mileage than the Dodge Charger?
About the same: 20.5 mpg for the 2026 G90 against 20 for the 2026 Dodge Charger.
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