- Newest year: 2015
- Gas
- Midsize cars
2015 Infiniti Q40 MPG & Fuel Cost
2 configurations · 20–22 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 3 of 10 midsize car configurations, MY2015. Ranked against all rated configurations, not sales-weighted.
2015 Infiniti Q40 at a glance
The 2015 Infiniti Q40 has 2 configurations in the EPA database, rated 20–22 MPG combined. The most efficient is the Q40 3.7L 6-cyl RWD at 22 MPG, which costs about $3,720 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). Annual fuel cost across the configurations runs from $3,720 to $3,940, a $220 difference. The Q40 3.7L 6-cyl RWD costs less to fuel than 3 of 10 midsize car configurations rated for MY2015 (class median $2,930 a year).
What the 2015 Q40 3.7L 6-cyl RWD costs to drive
Per month
$310
$3,720 a year ÷ 12
Per 25 miles
$6.20
Per 100 miles
$24.80
Five years
$18,600
5 × the yearly cost, prices held at today's level
vs the midsize car median
$790more a year
Class median $2,930 a year, MY2015
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2015 Infiniti Q40 MPG
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Q40 3.7L 6-cyl RWD (Most efficient) | 3.7L 6-cyl | RWD | 19 | 27 | 22 | $3,720 |
| Q40 3.7L 6-cyl AWD | 3.7L 6-cyl | AWD | 18 | 25 | 20 | $3,940 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the Q40 3.7L 6-cyl RWD: $4,430 in California and $3,220 in Texas, a $1,210 difference.
- California $4,430
- Washington $4,170
- New York $3,670
- Florida $3,390
- Texas $3,220
Similar cars
Closest combined MPG among MY2015 midsize car models.
Generations
- 2015
Frequently asked questions
What gas mileage does the 2015 Infiniti Q40 get?
EPA rates the 2015 Infiniti Q40 at 20–22 MPG combined across 2 configurations. The most efficient, the Q40 3.7L 6-cyl RWD, is rated 22 MPG combined (19 city / 27 highway).
How much does it cost to fuel a 2015 Infiniti Q40 per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the Q40 3.7L 6-cyl RWD costs about $3,720 a year. Across all 2 configurations the cost runs $3,720–$3,940 a year. That is a $220 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2015 Infiniti Q40 100 miles?
About $24.80 per 100 miles for the Q40 3.7L 6-cyl RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $24.80 and $26.27 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2015 Infiniti Q40 more efficient in the city or on the highway?
The Q40 3.7L 6-cyl RWD is rated 19 city and 27 highway MPG, so it is more efficient on the highway, by 8 MPG.
How does the 2015 Infiniti Q40 compare with other midsize car configurations?
The Q40 3.7L 6-cyl RWD costs about $3,720 a year to fuel, $790 more than the class median of $2,930, and less than 3 of 10 midsize car configurations. The comparison covers all 199 rated midsize car configurations for MY2015, not weighted by sales.