AutoSpecData

Infiniti QX70 Fuel Economy (MPG)

What is the real-world gas mileage of a 2017 Infiniti QX70?

The 2017 Infiniti QX70 gets up to 19 MPG combined (17 city / 24 highway) in EPA testing.

Latest model year (2017):

The Infiniti QX70 gets up to 19 MPG combined (17 city / 24 highway) in the Auto (S7), 6 cyl, 3.7 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026
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Infiniti QX70 MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2017Config 1 of 2Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline172419
2017Config 2 of 2Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline162218
2016Config 1 of 2Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline172419
2016Config 2 of 2Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline162218
2015Config 1 of 2Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline172419
2015Config 2 of 2Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline162218

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Infiniti QX70 data analysis

How Infiniti QX70 combined fuel economy varies

Across 6 configurations recorded for the 2015 through 2017 Infiniti QX70, combined fuel economy runs from 18 MPG to 19 MPG. The strongest figure belongs to the 2015 Infiniti QX70 (Auto (S7), 6 cyl, 3.7 L) at 19 MPG, and the weakest to the 2017 car (Auto (S7), 6 cyl, 3.7 L) at 18 MPG — a spread of 6%. The narrow spread means any year of the Infiniti QX70 in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.

What changed for 2017

Average combined fuel economy for the 2017 Infiniti QX70 is 18.5 MPG, against 18.5 MPG for the 2016 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.

How to read this Infiniti QX70 data

This page lists every 2015 through 2017 Infiniti QX70 record we hold for this measurement — 6 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Where these Infiniti QX70 figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Infiniti QX70 record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speedEPA highway specAutoSpecData adjusted MPGFuel you lose
60 mph24 MPG24 MPG0%
65 mph24 MPG21.9 MPG9%
70 mph24 MPG20 MPG17%
75 mph24 MPG18.3 MPG24%
80 mph24 MPG16.8 MPG30%

Our Real-World Speed MPG Adjuster re-scales the Infiniti QX70 EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About QX70 MPG

What is the MPG of the Infiniti QX70?

The Infiniti QX70 gets up to 19 MPG combined (17 city / 24 highway) in the 2017 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Infiniti QX70 trim has the best fuel economy?

The Auto (S7), 6 cyl, 3.7 L trim offers the best combined fuel economy at 19 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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