Against 161 other V6 cars rated 2025–2027, the QX80 trails their 20.9 mpg average by 2.9 mpg, about $296 a year. Averaged over the years each was sold, the most economical engine since 2014, the 3.5L 6-cyl (2025–2027), does 18 mpg and the thirstiest, the 5.6L 8-cyl (2014–2024), 16: $267 a year apart.
Every Infiniti QX80 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 | 16 / 20 | 2025–2027 | $2,133 | |
| 5.6L 8-cyl | 14 / 20 | 2014–2024 | $2,400 |
What that actually costs
Against its rivals in the same model years, the Toyota Highlander gets 29.5 mpg, the Jeep Grand Cherokee 22.7 mpg and the Lexus GX 17 mpg, next to 18 mpg for the 2027 QX80.
| Measure | Value |
|---|---|
| Cost per mile (2027) | $0.178 |
| Fuel per year | $2,133 |
| Fuel over five years | $10,665 |
| Against other V6 cars, 2025–2027 | +$296 a year |
| EPA's own estimate | $4,693 a year |
City or highway — who is this car for
The 2027 Infiniti QX80 gives up 4 mpg in town: 20 on the highway against 16 in the city, $480 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2027) | 16 mpg | $2,400 a year if you only drive in town |
| Highway | 20 mpg | $1,920 a year if you mostly commute |
| Gap | +4 mpg (25%) | Typical for its type |
How the QX80 changed over the years
The QX80 peaked in 2027 at 18 mpg (16 city, 20 highway) and was at its thirstiest in 2024 at 16 — 2 mpg apart, or $267 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2027 | 16 / 20 | 1 | $2,133 | |
| 2026 | 16 / 20 | 1 | $2,133 | |
| 2025 | 16 / 20 | 1 | $2,133 | |
| 2024 | 14 / 20 | 1 | $2,400 | |
| 2023 | 14 / 20 | 1 | $2,400 | |
| 2022 | 14 / 20 | 1 | $2,400 | |
| 2021 | 14 / 20 | 1 | $2,400 | |
| 2020 | 14 / 20 | 1 | $2,400 | |
| 2019 | 14 / 20 | 1 | $2,400 | |
| 2018 | 14 / 20 | 1 | $2,400 | |
| 2017 | 14 / 20 | 1 | $2,400 | |
| 2016 | 14 / 20 | 1 | $2,400 | |
| 2015 | 14 / 20 | 1 | $2,400 | |
| 2014 | 14 / 20 | 1 | $2,400 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 14 EPA ratings of the Infiniti QX80 — 2 engines across 2014–2027. 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 $4,693. Full method.
Frequently asked questions
What mpg does the 2027 Infiniti QX80 get?
18 mpg combined, 16 city and 20 highway, per EPA. Across every year since 2014 the QX80 has averaged 16.4 mpg.
Is the 2027 QX80 more efficient than the 2026?
About the same: 18 against 18 mpg combined.
Which QX80 year has the best gas mileage?
The 2027, at 18 mpg combined (16 city, 20 highway), which is also the latest model year we hold.
Does the QX80 get better gas mileage than the Toyota Highlander?
No: 18 mpg for the 2027 QX80 against 29.5 for the 2026 Toyota Highlander, about $831 a year more to run.
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