AutoSpecData

Genesis G90 Fuel Economy (MPG)

What is the real-world gas mileage of a 2026 Genesis G90?

The 2026 Genesis G90 gets up to 21 MPG combined (18 city / 26 highway) in EPA testing.

Latest model year (2026):

The Genesis G90 gets up to 21 MPG combined (18 city / 26 highway) in the Auto (S8), 6 cyl, 3.5 L trim.

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

Genesis G90 MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2026Config 1 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline182621
2026Config 2 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline172420
2025Config 1 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline182621
2025Config 2 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline172420
2024Config 1 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline182621
2024Config 2 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline172420
2023Config 1 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline182621
2023Config 2 of 2Auto (S8), 6 cyl, 3.5 L6 3.5LPremium Gasoline172420
2022Config 1 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2022Config 2 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172419
2022Config 3 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162318
2022Config 4 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162419
2021Config 1 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2021Config 2 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172419
2021Config 3 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162318
2021Config 4 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162419
2020Config 1 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172520
2020Config 2 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172520
2020Config 3 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline152318
2020Config 4 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162419
2019Config 1 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2019Config 2 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2019Config 3 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline152318
2019Config 4 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162419
2018Config 1 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2018Config 2 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2018Config 3 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline152318
2018Config 4 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162419
2017Config 1 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2017Config 2 of 4Auto (S8), 6 cyl, 3.3 L6 3.3LPremium Gasoline172420
2017Config 3 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline152318
2017Config 4 of 4Auto (S8), 8 cyl, 5.0 L8 5.0LPremium Gasoline162419

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.

Genesis G90 data analysis

How Genesis G90 combined fuel economy varies

Across 32 configurations recorded for the 2017 through 2026 Genesis G90, combined fuel economy runs from 18 MPG to 21 MPG. The strongest figure belongs to the 2023 Genesis G90 (Auto (S8), 6 cyl, 3.5 L) at 21 MPG, and the weakest to the 2022 car (Auto (S8), 8 cyl, 5.0 L) at 18 MPG — a spread of 17%. The narrow spread means any year of the Genesis G90 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 2026

Average combined fuel economy for the 2026 Genesis G90 is 20.5 MPG, against 20.5 MPG for the 2025 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 Genesis G90 data

This page lists every 2017 through 2026 Genesis G90 record we hold for this measurement — 32 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 Genesis G90 numbers

The 2017 through 2026 Genesis G90 entries here cover the variants Auto (S8), 6 cyl, 3.5 L, Auto (S8), 6 cyl, 3.3 L and Auto (S8), 8 cyl, 5.0 L. 2022 is the busiest model year in the record with 4 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 Genesis G90 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 Genesis G90 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 mph26 MPG26 MPG0%
65 mph26 MPG24.2 MPG7%
70 mph26 MPG22.6 MPG13%
75 mph26 MPG21 MPG19%
80 mph26 MPG19.6 MPG25%

Our Real-World Speed MPG Adjuster re-scales the Genesis G90 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 G90 MPG

What is the MPG of the Genesis G90?

The Genesis G90 gets up to 21 MPG combined (18 city / 26 highway) in the 2026 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Genesis G90 trim has the best fuel economy?

The Auto (S8), 6 cyl, 3.5 L trim offers the best combined fuel economy at 21 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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