AutoSpecData

Infiniti Q70 Fuel Economy (MPG)

What is the real-world gas mileage of a 2019 Infiniti Q70?

The 2019 Infiniti Q70 gets up to 31 MPG combined (29 city / 33 highway) in EPA testing.

Latest model year (2019):

The Infiniti Q70 gets up to 21 MPG combined (18 city / 25 highway) in the Auto (S7), 6 cyl, 3.7 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026
OverviewMPGEngine SpecsFuel CostTransmissionDrivetrainVehicle ClassMaintenanceDimensionsCurb Weight

Infiniti Q70 MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2019Config 1 of 4Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182420
2019Config 2 of 4Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182521
2019Config 3 of 4Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162318
2019Config 4 of 4Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162419
2018Config 1 of 5Auto (S7), 6 cyl, 3.5 L6 3.5LPremium Gasoline283330
2018Config 2 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182521
2018Config 3 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182420
2018Config 4 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162318
2018Config 5 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162419
2017Config 1 of 5Auto (S7), 6 cyl, 3.5 L6 3.5LPremium Gasoline283330
2017Config 2 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182521
2017Config 3 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182420
2017Config 4 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162419
2017Config 5 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162318
2016Config 1 of 5Auto (S7), 6 cyl, 3.5 L6 3.5LPremium Gasoline293331
2016Config 2 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182521
2016Config 3 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182420
2016Config 4 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162419
2016Config 5 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162318
2015Config 1 of 5Auto (S7), 6 cyl, 3.5 L6 3.5LPremium Gasoline293331
2015Config 2 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182621
2015Config 3 of 5Auto (S7), 6 cyl, 3.7 L6 3.7LPremium Gasoline182420
2015Config 4 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162419
2015Config 5 of 5Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline162318

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 Q70 data analysis

How Infiniti Q70 combined fuel economy varies

Across 24 configurations recorded for the 2015 through 2019 Infiniti Q70, combined fuel economy runs from 18 MPG to 31 MPG. The strongest figure belongs to the 2015 Infiniti Q70 (Auto (S7), 6 cyl, 3.5 L) at 31 MPG, and the weakest to the 2019 car (Auto (S7), 8 cyl, 5.6 L) at 18 MPG — a spread of 72%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Infiniti Q70 would be misleading.

What changed for 2019

Average combined fuel economy for the 2019 Infiniti Q70 is 19.5 MPG, against 21.6 MPG for the 2018 car — it fell by 2.1 MPG. Buyers who care most about this figure should look at the earlier model years in the table above before assuming newest is best.

How to read this Infiniti Q70 data

This page lists every 2015 through 2019 Infiniti Q70 record we hold for this measurement — 24 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.

Configurations behind these Infiniti Q70 numbers

The 2015 through 2019 Infiniti Q70 entries here cover the variants Auto (S7), 6 cyl, 3.7 L, Auto (S7), 8 cyl, 5.6 L and Auto (S7), 6 cyl, 3.5 L. 2018 is the busiest model year in the record with 5 separate measured configurations, which is why a single quoted combined fuel economy figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.

Where these Infiniti Q70 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 Q70 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 mph33 MPG33 MPG0%
65 mph33 MPG30.8 MPG7%
70 mph33 MPG28.7 MPG13%
75 mph33 MPG26.7 MPG19%
80 mph33 MPG24.9 MPG25%

Our Real-World Speed MPG Adjuster re-scales the Infiniti Q70 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 Q70 MPG

What is the MPG of the Infiniti Q70?

The Infiniti Q70 gets up to 31 MPG combined (29 city / 33 highway) in the 2019 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Infiniti Q70 trim has the best fuel economy?

The Auto (S7), 6 cyl, 3.5 L trim offers the best combined fuel economy at 31 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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