Infiniti · Small SUVs · Gasoline
Infiniti QX55: MPG and annual fuel cost, 2025
The Infiniti QX55 was last rated in the data for model year 2025, at 25 MPG combined, 14th of 20 small SUVs, in the lower half.
- 25MPG combined14th of 20 in class
- $3,300a year in fuel16th of 20 in class
- 366g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is 4th of 8 gasoline small SUVs, in the upper half, ahead of 57% of the others. The median of that narrower group is 24.5 MPG, against 26 MPG for all small SUVs together.
Across every class it is tied for 9th of 24 gasoline models, in the upper half.
In its class, just ahead of it is the Audi Q5 Hybrid at 26 MPG and just behind it is the BMW X4 at 24 MPG.
Fuel cost and CO2
At 15,000 miles a year with 55% of them in the city, with premium gasoline at $5.48 per gallon, the annual fuel bill of the most efficient version is about $3,300. That is $375 more than the small SUVs median of $2,925, which makes it 16th of 20 small SUVs, in the bottom quarter.
It emits 366 g of CO2 per mile from the tailpipe; the small SUVs median is 319.5, a difference of 46 g/mile.
Rated versions
In the city the most efficient version is rated 22 and on the highway 28, 6 better on the open road. The data lists one version for 2025: QX55 AWD: 2.0 L, 4 cyl, Automatic (AV-S8), AWD.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| QX55 AWD: 2.0 L, 4 cyl, Automatic (AV-S8), AWD | 25 | 22 | 28 | $3,300 | 366 |
Year by year
The Infiniti QX55 is in the data for 4 of the 8 model years from 2019 to 2026. Its best combined rating is 25 MPG in both 2022 and 2025.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2025 | 1 | 25 | 25 | $3,300 | 366 | 29 |
| 2024 | 1 | 25 | 25 | $3,300 | 364 | 28 |
| 2023 | 1 | 25 | 25 | $3,300 | 366 | 27 |
| 2022 | 1 | 25 | 25 | $3,300 | 364 | 26 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| BMW X4 | Gasoline | 24 | $3,400 | 2025 |
| Cadillac XT4 | Gasoline | 26 | $3,150 | 2025 |
| Audi Q5 Hybrid | Hybrid | 26 | $3,150 | 2025 |
| Maserati Grecale Hybrid | Hybrid | 24 | $3,400 | 2025 |
| Cadillac XT6 | Gasoline | 23 | $3,550 | 2025 |
Rated almost identically and covered by this page:
- Dodge Hornet 24 MPG, $2,800 a year, 1 version, last rated 2025
Compare and rank
Rankings: Small SUVs.
Data: US EPA and DOE, as prepared in methods and data.