Against 161 other V6 cars rated 2025–2027, the G80 sits right on their 20.9 mpg average. Averaged over the years each was sold, the most economical engine since 2017, the 2.5L 4-cyl (2021–2027), does 24.7 mpg and the thirstiest, the 5L 8-cyl (2017–2020), 18.8: $488 a year apart.
Every Genesis G80 engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2.5L 4-cyl | 21.4 / 30.4 | 2021–2027 | $1,555 | |
| 3.8L 6-cyl | 18.3 / 26.8 | 2017–2020 | $1,786 | |
| 3.5L 6-cyl | 16.6 / 25 | 2021–2027 | $1,990 | |
| 5L 8-cyl | 15.8 / 23.8 | 2017–2020 | $2,043 |
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 21 mpg, next to 20.5 mpg for the 2027 G80.
| Measure | Value |
|---|---|
| Cost per mile (2027) | $0.156 |
| Fuel per year | $1,873 |
| Fuel over five years | $9,365 |
| Against other V6 cars, 2025–2027 | +$36 a year |
| EPA's own estimate | $3,545 a year |
City or highway — who is this car for
The 2027 Genesis G80 gives up 8.5 mpg in town: 26.5 on the highway against 18 in the city, $684 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2027) | 18 mpg | $2,133 a year if you only drive in town |
| Highway | 26.5 mpg | $1,449 a year if you mostly commute |
| Gap | +8.5 mpg (47%) | Wide — this car dislikes traffic |
How the G80 changed over the years
The G80 peaked in 2021 at 24 mpg (21 city, 29.5 highway) and was at its thirstiest in 2020 at 20 — 4 mpg apart, or $320 a year in fuel between buying one year and the other. The 2027 car does 20.5. The biggest single-year change came in 2021: 20 to 24 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2027 | 18 / 26.5 | 2 | $1,873 | |
| 2026 | 17.5 / 26.5 | 2 | $1,873 | |
| 2025 | 18 / 26.5 | 2 | $1,786 | |
| 2024 | 19.5 / 27.5 | 2 | $1,745 | |
| 2023 | 19 / 28.5 | 2 | $1,707 | |
| 2022 | 20 / 29 | 2 | $1,670 | |
| 2021 | 21 / 29.5 | 2 | $1,600 | |
| 2020 | 17 / 25 | 2 | $1,920 | |
| 2019 | 17 / 25 | 2 | $1,920 | |
| 2018 | 17.5 / 25.5 | 2 | $1,873 | |
| 2017 | 16.5 / 25.5 | 2 | $1,920 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
- No ads, no tracking — and much more
How we count
This page rests on 22 EPA ratings of the Genesis G80 — 4 engines across 2017–2027. 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 $3,545. Full method.
Frequently asked questions
What mpg does the 2027 Genesis G80 get?
20.5 mpg combined, 18 city and 26.5 highway, per EPA; its 2 versions that year range from 18 to 23. Across every year since 2017 the G80 has averaged 21.3 mpg.
Is the 2027 G80 more efficient than the 2026?
About the same: 20.5 against 20.5 mpg combined.
Which G80 year has the best gas mileage?
The 2021, at 24 mpg combined (21 city, 29.5 highway).
Does the G80 get better gas mileage than the Dodge Charger?
About the same: 20.5 mpg for the 2027 G80 against 20 for the 2026 Dodge Charger.
Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.