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Cadillac CT5 Fuel Economy (MPG)

What is the real-world gas mileage of a 2026 Cadillac CT5?

The 2026 Cadillac CT5 gets up to 27 MPG combined (23 city / 33 highway) in EPA testing.

Latest model year (2026):

The Cadillac CT5 gets up to 26 MPG combined (22 city / 31 highway) in the Auto (S10), 4 cyl, 2.0 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026
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Cadillac CT5 MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2026Config 1 of 8Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline213024
2026Config 2 of 8Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline223126
2026Config 3 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2026Config 4 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192822
2026Config 5 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline172620
2026Config 6 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2026Config 7 of 8Auto (S10), 8 cyl, 6.2 L8 6.2LPremium Gasoline132015
2026Config 8 of 8Man 6-spd, 8 cyl, 6.2 L8 6.2LPremium Gasoline132015
2025Config 1 of 8Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline233226
2025Config 2 of 8Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline213025
2025Config 3 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline172620
2025Config 4 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182621
2025Config 5 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2025Config 6 of 8Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192822
2025Config 7 of 8Auto (S10), 8 cyl, 6.2 L8 6.2LPremium Gasoline132015
2025Config 8 of 8Man 6-spd, 8 cyl, 6.2 L8 6.2LPremium Gasoline132015
2024Config 1 of 7Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline233327
2024Config 2 of 7Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline223025
2024Config 3 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182621
2024Config 4 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192722
2024Config 5 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2024Config 6 of 7Auto (S10), 8 cyl, 6.2 L8 6.2LPremium Gasoline132116
2024Config 7 of 7Man 6-spd, 8 cyl, 6.2 L8 6.2LPremium Gasoline132115
2023Config 1 of 7Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline233327
2023Config 2 of 7Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline223025
2023Config 3 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182621
2023Config 4 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2023Config 5 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192722
2023Config 6 of 7Auto (S10), 8 cyl, 6.2 L8 6.2LPremium Gasoline132116
2023Config 7 of 7Man 6-spd, 8 cyl, 6.2 L8 6.2LPremium Gasoline132115
2022Config 1 of 7Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline223025
2022Config 2 of 7Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline233327
2022Config 3 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192722
2022Config 4 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2022Config 5 of 7Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182621
2022Config 6 of 7Auto (S10), 8 cyl, 6.2 L8 6.2LPremium Gasoline132216
2022Config 7 of 7Man 6-spd, 8 cyl, 6.2 L8 6.2LPremium Gasoline132115
2021Config 1 of 5Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline233226
2021Config 2 of 5Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline213125
2021Config 3 of 5Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182721
2021Config 4 of 5Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192822
2021Config 5 of 5Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182621
2020Config 1 of 6Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline233226
2020Config 2 of 6Auto (S10), 4 cyl, 2.0 L4 2.0LPremium Gasoline213125
2020Config 3 of 6Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182521
2020Config 4 of 6Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline182621
2020Config 5 of 6Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline172520
2020Config 6 of 6Auto (S10), 6 cyl, 3.0 L6 3.0LPremium Gasoline192621

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.

Cadillac CT5 data analysis

How Cadillac CT5 combined fuel economy varies

Across 48 configurations recorded for the 2020 through 2026 Cadillac CT5, combined fuel economy runs from 15 MPG to 27 MPG. The strongest figure belongs to the 2022 Cadillac CT5 (Auto (S10), 4 cyl, 2.0 L) at 27 MPG, and the weakest to the 2026 car (Auto (S10), 8 cyl, 6.2 L) at 15 MPG — a spread of 80%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Cadillac CT5 would be misleading.

What changed for 2026

Average combined fuel economy for the 2026 Cadillac CT5 is 20.5 MPG, against 20.6 MPG for the 2025 car — it fell by 0.1 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 Cadillac CT5 data

This page lists every 2020 through 2026 Cadillac CT5 record we hold for this measurement — 48 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 Cadillac CT5 numbers

The 2020 through 2026 Cadillac CT5 entries here cover the variants Auto (S10), 4 cyl, 2.0 L, Auto (S10), 6 cyl, 3.0 L, Auto (S10), 8 cyl, 6.2 L and Man 6-spd, 8 cyl, 6.2 L. 2026 is the busiest model year in the record with 8 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 Cadillac CT5 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 Cadillac CT5 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 Cadillac CT5 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 CT5 MPG

What is the MPG of the Cadillac CT5?

The Cadillac CT5 gets up to 27 MPG combined (23 city / 33 highway) in the 2026 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Cadillac CT5 trim has the best fuel economy?

The Auto (S10), 4 cyl, 2.0 L trim offers the best combined fuel economy at 27 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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