Cadillac CELESTIQ Fuel Economy (MPG)
What is the real-world gas mileage of a 2026 Cadillac CELESTIQ?
The 2026 Cadillac CELESTIQ gets up to 81 MPG combined (84 city / 77 highway) in EPA testing.
Latest model year (2026):
The Cadillac CELESTIQ gets up to 81 MPG combined (84 city / 77 highway) in the Auto (A1) trim.
Cadillac CELESTIQ MPG — All Years
| Year | Trim | Engine | Fuel | City (MPG) | Hwy (MPG) | Combined (MPG) |
|---|---|---|---|---|---|---|
| 2026 | Auto (A1) | — | Electricity | 84 | 77 | 81 |
| 2025 | Auto (A1) | — | Electricity | 84 | 77 | 81 |
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 CELESTIQ data analysis
How Cadillac CELESTIQ combined fuel economy varies
Across 2 configurations recorded for the 2025 through 2026 Cadillac CELESTIQ, combined fuel economy runs from 81 MPG to 81 MPG. The strongest figure belongs to the 2025 Cadillac CELESTIQ (Auto (A1)) at 81 MPG, and the weakest to the 2026 car (Auto (A1)) at 81 MPG — a spread of 0%. The narrow spread means any year of the Cadillac CELESTIQ 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 Cadillac CELESTIQ is 81 MPG, against 81 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 Cadillac CELESTIQ data
This page lists every 2025 through 2026 Cadillac CELESTIQ record we hold for this measurement — 2 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.
Where these Cadillac CELESTIQ 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 CELESTIQ 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 | 77 MPG | 77 MPG | 0% |
| 65 mph | 77 MPG | 71.8 MPG | 7% |
| 70 mph | 77 MPG | 66.9 MPG | 13% |
| 75 mph | 77 MPG | 62.3 MPG | 19% |
| 80 mph | 77 MPG | 58 MPG | 25% |
Our Real-World Speed MPG Adjuster re-scales the Cadillac CELESTIQ 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 CELESTIQ MPG
What is the MPG of the Cadillac CELESTIQ?
The Cadillac CELESTIQ gets up to 81 MPG combined (84 city / 77 highway) in the 2026 model year. Fuel economy varies by engine and trim — see the full table above for details.
Which Cadillac CELESTIQ trim has the best fuel economy?
The Auto (A1) trim offers the best combined fuel economy at 81 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.
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