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Infiniti FX37 (S51)
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  • MY2014–2017

Infiniti QX70 MPG & Fuel Cost by Year

4 model years · 2014–2017

19 MPG
Combined
17 MPG
City
24 MPG
Highway
Annual cost · MY2017 QX70 3.7L 6-cyl RWD
$4,130

15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)

All Infiniti models

Infiniti QX70 fuel economy at a glance

EPA has rated the Infiniti QX70 for 4 model years, 2014 to 2017. Across those years its combined rating runs 16–19 MPG. The latest model year, 2017, has 2 configurations rated 18–19 MPG combined and costing $4,130–$4,390 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2014 is the 2017 QX70 3.7L 6-cyl RWD, at 19 MPG.

Infiniti QX70 MPG by year

161820 20142017 Gas 161820 20142017 Gas
Combined MPG: the line is the most efficient configuration, the shaded band reaches down to the least efficient. Dotted lines mark new generations.
Infiniti QX70: combined fuel economy and annual fuel cost for each model year, grouped by generation
Year Gas (MPG) $/yr
2014-2017 (S51) Generation page
2017 18–19 $4,130–$4,390
2016 18–19 $4,130–$4,380
2015 18–19 $4,130–$4,380
2014 16–19 $4,170–$4,930

Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.

Infiniti QX70 generations

1 generations between 2014 and 2017. Open one for the table of every model year and configuration.

2017 powertrain options

Gas · 3.7L
Combined
18–19 MPG
Per year
$4,130–$4,390
See gas configurations
EPA ratings: fueleconomy.gov file of Sep 29, 2026 · premium gasoline $5.36/gal (U.S. average, Sep 2026) · 15,000 mi/yr, 55% city / 45% highway · How we calculate

Frequently asked questions

What is the Infiniti QX70's gas mileage by year?

EPA combined ratings for the Infiniti QX70 run 16–19 MPG across model years 2014 to 2017. The latest year, 2017, is rated 18–19 MPG.

Which Infiniti QX70 model year has the best gas mileage?

The 2017 Infiniti QX70 QX70 3.7L 6-cyl RWD has the highest combined rating since 2014, at 19 MPG.

How much does a Infiniti QX70 cost to fuel per year?

For MY2017, EPA-rated configurations cost $4,130–$4,390 a year to fuel, driving 15,000 miles at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient one costs $4,130.

Has the Infiniti QX70's fuel economy improved over time?

Not much. The most efficient configuration is rated 19 MPG in both 2014 and 2017.

Which Infiniti QX70 model years have the same ratings?

EPA lists identical ratings as the previous year for 2016. The generation pages mark those years "same EPA ratings" and point to the year that holds the full table.