The BMW X4 does 22.2 mpg combined (19.7 city, 25.9 highway), which works out to about $1,730 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 23.9 mpg while 3L 6-cyl does 20.1 — a difference of $303 a year. Against other 4-cyl cars it sits below the average of 25.7 mpg.
Every BMW X4 engine, compared
Gas mileage on the BMW X4 ranges from 23.9 down to 20.1 depending on which engine sits under the bonnet — a spread of $303 a year across 3 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 | 21.1 / 27.9 | 2015–2025 | $1,607 | |
| 3L 6-cyl Hybrid | 21.3 / 26 | 2022–2025 | $1,670 | |
| 3L 6-cyl | 17.8 / 23.9 | 2015–2025 | $1,910 |
What that actually costs
The BMW X4 burns a gallon every 22.2 miles, so 12,000 miles takes about 541 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.144 |
| Fuel per year | $1,730 |
| Fuel over five years | $8,650 |
| Against other 4-cyl cars | +$236 a year |
| EPA's own estimate | $3,529 a year |
City or highway — who is this car for
The BMW X4 gives up 6.2 mpg the moment you leave the motorway — 25.9 out there against 19.7 in town, a 31% drop worth $466 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 | 19.7 mpg | $1,949 a year if you only drive in town |
| Highway | 25.9 mpg | $1,483 a year if you mostly commute |
| Gap | +6.2 mpg (31%) | Wide — this car dislikes traffic |
How the X4 changed over the years
The X4 peaked in 2021 at 24 mpg (22 city, 28 highway) and was at its thirstiest in 2025 at 21.3 — 2.7 mpg apart, or $203 a year in fuel between buying one year and the other. The 2025 car does 21.3. 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 |
|---|---|---|---|---|
| 2025 | 19.3 / 24.3 | 3 | $1,803 | |
| 2024 | 19 / 24.7 | 3 | $1,803 | |
| 2023 | 19 / 24.7 | 3 | $1,803 | |
| 2022 | 19 / 24.7 | 3 | $1,803 | |
| 2021 | 22 / 28 | 2 | $1,600 | |
| 2020 | 22 / 27.5 | 2 | $1,600 | |
| 2019 | 21 / 28 | 2 | $1,600 | |
| 2018 | 19 / 26.5 | 2 | $1,745 | |
| 2017 | 19.5 / 26.5 | 2 | $1,745 | |
| 2016 | 19 / 26 | 2 | $1,745 | |
| 2015 | 19.5 / 27 | 2 | $1,745 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 26 EPA ratings of the BMW X4 — 3 engines across 2015–2025. 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 $3,529. Full method.
Frequently asked questions
What mpg does the BMW X4 get?
22.2 mpg combined on average — 19.7 in the city and 25.9 on the highway, per EPA ratings across 2015–2025.
How much does a BMW X4 cost in fuel per year?
About $1,730 at 12,000 miles and $3.20 a gallon — roughly $8,650 over five years, or 0.144 dollars a mile.
Which X4 engine is the most economical?
The 2L 4-cyl at 23.9 mpg, against 20.1 for the 3L 6-cyl — a difference of about $303 a year.
Is the X4 good on fuel compared with similar cars?
Against other 4-cyl cars it sits below the average of 25.7 mpg, computed across 4765 ratings.
Are these real-world X4 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the BMW X4 is $3,529 against the $1,730 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 25 and 17 mpg versions of this car is smaller than the spread between two drivers of the same one.
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