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 25.4 mpg.
Every BMW X4 engine, compared
Picking the right version of the same car 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
Miles per gallon is an abstraction; the fuel bill is not. Here it is in money, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Cost per mile | $0.144 |
| Fuel per year | $1,730 |
| Fuel over five years | $8,650 |
| Against other 4-cyl cars | +$218 a year |
| EPA's own estimate | $3,421 a year |
City or highway — who is this car for
The gap between city and highway figures tells you whom the car suits. 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
Combined figure by model year. 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
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
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 25.4 mpg, computed across 6877 ratings.
Are these real-world figures?
No — they are EPA laboratory ratings, the same ones on the window sticker. Real consumption depends on driving style, terrain, load and weather, and is typically a little worse.