Cadillac XT6 Fuel Economy (MPG)

Name: Cadillac XT6 MPG & Fuel Economy
Creator: AutoSpecData
License: https://creativecommons.org/licenses/by/4.0/

What is the real-world gas mileage of a 2025 Cadillac XT6?

The 2025 Cadillac XT6 gets up to 23 MPG combined (21 city / 27 highway) in EPA testing.

Latest model year (2025):

The Cadillac XT6 gets up to 23 MPG combined (21 city / 27 highway) in the Auto (S9), 4 cyl, 2.0 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026

Overview MPG Engine Specs Fuel Cost Transmission Drivetrain Vehicle Class Maintenance Dimensions Curb Weight Safety

Cadillac XT6 MPG — All Years

Year	Trim	Engine	Fuel	City (MPG)	Hwy (MPG)	Combined (MPG)
2025Config 1 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	27	23
2025Config 2 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	26	23
2025Config 3 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	19	26	21
2025Config 4 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	18	25	20
2024Config 1 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	26	23
2024Config 2 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	27	23
2024Config 3 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	19	26	21
2024Config 4 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	18	25	21
2023Config 1 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	26	23
2023Config 2 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	27	23
2023Config 3 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	18	25	21
2023Config 4 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	19	26	21
2022Config 1 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	27	23
2022Config 2 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	26	23
2022Config 3 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	19	26	21
2022Config 4 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	18	25	21
2021Config 1 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	26	23
2021Config 2 of 4	Auto (S9), 4 cyl, 2.0 L	4 2.0L	Premium Gasoline	21	27	23
2021Config 3 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	19	26	21
2021Config 4 of 4	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	18	25	21
2020Config 1 of 2	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	18	25	20
2020Config 2 of 2	Auto (S9), 6 cyl, 3.6 L	6 3.6L	Regular Gasoline	17	24	20

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 XT6 data analysis

How Cadillac XT6 combined fuel economy varies

Across 22 configurations recorded for the 2020 through 2025 Cadillac XT6, combined fuel economy runs from 20 MPG to 23 MPG. The strongest figure belongs to the 2021 Cadillac XT6 (Auto (S9), 4 cyl, 2.0 L) at 23 MPG, and the weakest to the 2025 car (Auto (S9), 6 cyl, 3.6 L) at 20 MPG — a spread of 15%. The narrow spread means any year of the Cadillac XT6 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 2025

Average combined fuel economy for the 2025 Cadillac XT6 is 21.8 MPG, against 22 MPG for the 2024 car — it fell by 0.3 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 XT6 data

This page lists every 2020 through 2025 Cadillac XT6 record we hold for this measurement — 22 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 XT6 numbers

The 2020 through 2025 Cadillac XT6 entries here cover the variants Auto (S9), 4 cyl, 2.0 L and Auto (S9), 6 cyl, 3.6 L. 2025 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 Cadillac XT6 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 XT6 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 speed	EPA highway spec	AutoSpecData adjusted MPG	Fuel you lose
60 mph	27 MPG	27 MPG	0%
65 mph	27 MPG	24.6 MPG	9%
70 mph	27 MPG	22.5 MPG	17%
75 mph	27 MPG	20.6 MPG	24%
80 mph	27 MPG	18.9 MPG	30%

Our Real-World Speed MPG Adjuster re-scales the Cadillac XT6 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 XT6 MPG

What is the MPG of the Cadillac XT6?

The Cadillac XT6 gets up to 23 MPG combined (21 city / 27 highway) in the 2025 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Cadillac XT6 trim has the best fuel economy?

The Auto (S9), 4 cyl, 2.0 L trim offers the best combined fuel economy at 23 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.