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2026 Lexus IS Specs: MPG, Gas Mileage, Engine Size & Dimensions

2015–2026 model years52 variantsUp to 26 MPG combined
Real-World MPG QuestionsBed Dimensions & Cargo SpaceService Intervals

2026 Lexus IS Specs at a Glance

The 2026 Lexus IS gets 22 mpg combined on the 3.5L All-Wheel Drive configuration, weighs 3,913 lbs, measures 185.8 in long. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.

Combined MPG
22 mpg (19 city / 26 hwy)
Best configuration: 3.5L · All-Wheel Drive · Automatic (S6)
Engine
3.5L 6-cyl
3.5L · All-Wheel Drive · Automatic (S6)
Curb weight
3,913 lbs
Heaviest recorded configuration: IS 350 4DR SEDAN AWD
Length
185.8 in · 72.4 in wide · 56.3 in tall
Wheelbase
110.2 in

2026 Lexus IS trims and MPG

TrimEngineTransDriveCityHwyCombined
Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622
Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive192722

Detailed Specifications

MPG & Fuel Economy

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Engine Specifications

Engine Specs for every year and trim

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Annual Fuel Cost

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Transmission Specifications

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Drivetrain & Drive Type

Drivetrain for every year and trim

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Vehicle Class & EPA Size Category

Vehicle Class for every year and trim

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Maintenance Schedule & Service Intervals

Maintenance for every year and trim

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Dimensions & Size

Dimensions for every year and trim

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Curb Weight

Curb Weight for every year and trim

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Lexus IS Generations

Grouped by year ranges where the engine lineup, drivetrain options, and EPA class stay consistent — a derived approximation of the factory generations, not a manufacturer-published list.

YearsVariantsEnginesDriveClassBest MPG
202623.5LAll-Wheel Drive, Rear-Wheel DriveCompact Cars22
2015–2025412.0L, 2.5L, 3.5L, 5.0LAll-Wheel Drive, Rear-Wheel DriveCompact Cars, Subcompact Cars26

Lexus IS — All Years Overview

YearTrimEngineTransDriveCityHwyCombinedFuel
2026Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2026Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive192722Premium Gasoline
2025Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2025Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213125Premium Gasoline
2025Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2025Auto (S8), 8 cyl, 5.0 L8 · 5.0LAutomatic (S8)Rear-Wheel Drive172520Premium Gasoline
2024Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2024Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213125Premium Gasoline
2024Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2024Auto (S8), 8 cyl, 5.0 L8 · 5.0LAutomatic (S8)Rear-Wheel Drive172520Premium Gasoline
2023Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2023Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213125Premium Gasoline
2023Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2023Auto (S8), 8 cyl, 5.0 L8 · 5.0LAutomatic (S8)Rear-Wheel Drive172520Premium Gasoline
2022Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2022Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213125Premium Gasoline
2022Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2022Auto (S8), 8 cyl, 5.0 L8 · 5.0LAutomatic (S8)Rear-Wheel Drive172520Premium Gasoline
2021Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2021Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213125Premium Gasoline
2021Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2020Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive182421Premium Gasoline
2020Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192621Premium Gasoline
2020Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213024Premium Gasoline
2020Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2019Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192621Premium Gasoline
2019Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive213024Premium Gasoline
2019Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2018Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192622Premium Gasoline
2018Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive223226Premium Gasoline
2018Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive202823Premium Gasoline
2017Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192621Premium Gasoline
2017Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive223226Premium Gasoline
2017Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive192822Premium Gasoline
2016Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192621Premium Gasoline
2016Auto (S8), 4 cyl, 2.0 L4 · 2.0LAutomatic (S8)Rear-Wheel Drive223226Premium Gasoline
2016Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive192822Premium Gasoline
2015Auto (S6), 6 cyl, 2.5 L6 · 2.5LAutomatic (S6)All-Wheel Drive202723Premium Gasoline
2015Auto (S6), 6 cyl, 2.5 L6 · 2.5LAutomatic (S6)Rear-Wheel Drive213024Premium Gasoline
2015Auto (S6), 6 cyl, 2.5 L6 · 2.5LAutomatic (S6)Rear-Wheel Drive213024Premium Gasoline
2015Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)All-Wheel Drive192621Premium Gasoline
2015Auto (S6), 6 cyl, 3.5 L6 · 3.5LAutomatic (S6)Rear-Wheel Drive192722Premium Gasoline
2015Auto (S8), 6 cyl, 3.5 L6 · 3.5LAutomatic (S8)Rear-Wheel Drive192822Premium Gasoline

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Lexus IS — Frequently Asked Questions

What is the fuel economy of the 2026 Lexus IS?

The Lexus IS is EPA-rated at up to 26 MPG combined (22 city / 32 highway), a historical peak recorded on the 2018 model year.

What engine does the 2026 Lexus IS have?

The Lexus IS uses a 3.5L 6-cylinder engine paired with an Automatic transmission.

What years of the Lexus IS are covered here?

This page documents 43 verified Lexus IS configurations across model years 2015–2026.

Which model year of the Lexus IS is the most fuel efficient?

The 2018 Lexus IS holds the highest combined rating at 26 MPG; the 2026 sits lowest at 22 MPG, a difference of 4 MPG (about 18%) across the 12 rated years on file.

How many engine options does the Lexus IS have?

The records list 4 distinct displacements for the Lexus IS — 2L, 2.5L, 3.5L, 5L — which is why combined MPG varies between trims of the same year.

Is the 2026 Lexus IS front-wheel drive or all-wheel drive?

The Lexus IS appears in 2 drivetrain layouts across the years documented here — All-Wheel Drive, Rear-Wheel Drive — with the latest 2026 record on All-Wheel Drive.

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