The Cadillac XT5 does 22.4 mpg combined (19.8 city, 27.2 highway), which works out to about $1,714 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 2L 4-cyl does 24 mpg while 3.6L 6-cyl does 21.3 — a difference of $203 a year. Against other V6 cars it sits above the average of 19.9 mpg.
Every Cadillac XT5 engine, compared
Gas mileage on the Cadillac XT5 ranges from 24 down to 21.3 depending on which engine sits under the bonnet — a spread of $203 a year across 2 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2L 4-cyl | 21.9 / 28.9 | 2020–2026 | $1,600 | |
| 3.6L 6-cyl | 18.3 / 26 | 2017–2026 | $1,803 |
What that actually costs
The Cadillac XT5 burns a gallon every 22.4 miles, so 12,000 miles takes about 536 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.143 |
| Fuel per year | $1,714 |
| Fuel over five years | $8,570 |
| Against other V6 cars | −$216 a year |
| EPA's own estimate | $3,035 a year |
City or highway — who is this car for
The Cadillac XT5 gives up 7.4 mpg the moment you leave the motorway — 27.2 out there against 19.8 in town, a 37% drop worth $527 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 19.8 mpg | $1,939 a year if you only drive in town |
| Highway | 27.2 mpg | $1,412 a year if you mostly commute |
| Gap | +7.4 mpg (37%) | Wide — this car dislikes traffic |
How the XT5 changed over the years
The XT5 peaked in 2026 at 22.5 mpg (20 city, 27.5 highway) and was at its thirstiest in 2019 at 22 — 0.5 mpg apart, or $38 a year in fuel between buying one year and the other. The 2026 car does 22.5. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 20 / 27.5 | 2 | $1,707 | |
| 2025 | 20 / 27.5 | 2 | $1,707 | |
| 2024 | 20 / 27.5 | 2 | $1,707 | |
| 2023 | 20 / 27 | 2 | $1,707 | |
| 2022 | 20 / 27.5 | 2 | $1,707 | |
| 2021 | 20 / 27.5 | 2 | $1,707 | |
| 2020 | 19.5 / 27 | 2 | $1,707 | |
| 2019 | 19 / 26 | 1 | $1,745 | |
| 2018 | 19 / 26 | 1 | $1,745 | |
| 2017 | 19 / 27 | 1 | $1,745 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 17 EPA ratings of the Cadillac XT5 — 2 engines across 2017–2026. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,035. Full method.
Frequently asked questions
What mpg does the Cadillac XT5 get?
22.4 mpg combined on average — 19.8 in the city and 27.2 on the highway, per EPA ratings across 2017–2026.
How much does a Cadillac XT5 cost in fuel per year?
About $1,714 at 12,000 miles and $3.20 a gallon — roughly $8,570 over five years, or 0.143 dollars a mile.
Which XT5 engine is the most economical?
The 2L 4-cyl at 24 mpg, against 21.3 for the 3.6L 6-cyl — a difference of about $203 a year.
Is the XT5 good on fuel compared with similar cars?
Against other V6 cars it sits above the average of 19.9 mpg, computed across 4940 ratings.
Are these real-world XT5 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Cadillac XT5 is $3,035 against the $1,714 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 24 and 21 mpg versions of this car is smaller than the spread between two drivers of the same one.
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