AutoSpecData

Infiniti QX80 Fuel Economy (MPG)

What is the real-world gas mileage of a 2027 Infiniti QX80?

The 2027 Infiniti QX80 gets up to 18 MPG combined (16 city / 20 highway) in EPA testing.

Latest model year (2027):

The Infiniti QX80 gets up to 18 MPG combined (16 city / 20 highway) in the Auto (S9), 6 cyl, 3.5 L trim.

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

Infiniti QX80 MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2027Config 1 of 2Auto (S9), 6 cyl, 3.5 L6 3.5LPremium Gasoline161917
2027Config 2 of 2Auto (S9), 6 cyl, 3.5 L6 3.5LPremium Gasoline162018
2026Config 1 of 2Auto (S9), 6 cyl, 3.5 L6 3.5LPremium Gasoline161917
2026Config 2 of 2Auto (S9), 6 cyl, 3.5 L6 3.5LPremium Gasoline162018
2025Config 1 of 2Auto (S9), 6 cyl, 3.5 L6 3.5LPremium Gasoline161917
2025Config 2 of 2Auto (S9), 6 cyl, 3.5 L6 3.5LPremium Gasoline162018
2024Config 1 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2024Config 2 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2023Config 1 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2023Config 2 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2023Config 3 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2022Config 1 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2022Config 2 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2022Config 3 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2021Config 1 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2021Config 2 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2021Config 3 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2020Config 1 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2020Config 2 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2019Config 1 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2019Config 2 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2018Config 1 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2018Config 2 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2017Config 1 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2017Config 2 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915
2016Config 1 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2016Config 2 of 2Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline141916
2015Config 1 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2015Config 2 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline142016
2015Config 3 of 3Auto (S7), 8 cyl, 5.6 L8 5.6LPremium Gasoline131915

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 QX80 data analysis

How Infiniti QX80 combined fuel economy varies

Across 30 configurations recorded for the 2015 through 2027 Infiniti QX80, combined fuel economy runs from 15 MPG to 18 MPG. The strongest figure belongs to the 2025 Infiniti QX80 (Auto (S9), 6 cyl, 3.5 L) at 18 MPG, and the weakest to the 2024 car (Auto (S7), 8 cyl, 5.6 L) at 15 MPG — a spread of 20%. 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 QX80 would be misleading.

What changed for 2027

Average combined fuel economy for the 2027 Infiniti QX80 is 17.5 MPG, against 17.5 MPG for the 2026 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 QX80 data

This page lists every 2015 through 2027 Infiniti QX80 record we hold for this measurement — 30 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 QX80 numbers

The 2015 through 2027 Infiniti QX80 entries here cover the variants Auto (S9), 6 cyl, 3.5 L and Auto (S7), 8 cyl, 5.6 L. 2023 is the busiest model year in the record with 3 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 QX80 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 QX80 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 mph20 MPG20 MPG0%
65 mph20 MPG18.3 MPG9%
70 mph20 MPG16.7 MPG17%
75 mph20 MPG15.3 MPG24%
80 mph20 MPG14 MPG30%

Our Real-World Speed MPG Adjuster re-scales the Infiniti QX80 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 QX80 MPG

What is the MPG of the Infiniti QX80?

The Infiniti QX80 gets up to 18 MPG combined (16 city / 20 highway) in the 2027 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Infiniti QX80 trim has the best fuel economy?

The Auto (S9), 6 cyl, 3.5 L trim offers the best combined fuel economy at 18 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

View full Infiniti QX80 specs

MPG for other Infiniti models

MPG on other brands

Compare across every brand

All Infiniti QX80 specifications

More Infiniti models

View all Infiniti models →

Browse other makes

Free tools people use next

No account needed
Decode any VINEngine, drivetrain & towing from a VINCompare car sizesOverlay two vehicles to scaleMaintenance scheduleService intervals + PDF exportBest MPG, rankedTop EPA combined MPG by class