BMW Z4 sDrive30i
28 MPG The 2026 BMW Z4 sDrive30i is EPA-rated at 28 MPG combined (25 city / 33 highway). Over 15,000 miles a year that is about 536 gallons, $1714 a year in fuel, or $0.114 per mile at $3.20/gal.
Across its full 2009–2026 run it averages 26.3 MPG, improving by 6 MPG over 11 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.089 | $893 | $1339 | $1786 |
| $3.00/gal | $0.107 | $1071 | $1607 | $2143 |
| $3.20/gal | $0.114 | $1143 | $1714 | $2286 |
| $3.50/gal | $0.125 | $1250 | $1875 | $2500 |
| $4.00/gal | $0.143 | $1429 | $2143 | $2857 |
| $4.50/gal | $0.161 | $1607 | $2411 | $3214 |
| $5.00/gal | $0.179 | $1786 | $2679 | $3571 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2026 | 28 MPG | 25 | 33 | $2750 | 312 | 1 |
| 2025 | 28 MPG | 25 | 33 | $2750 | 312 | 1 |
| 2024 | 28 MPG | 25 | 33 | $2750 | 312 | 1 |
| 2023 | 28 MPG | 25 | 33 | $2750 | 312 | 1 |
| 2022 | 28 MPG | 25 | 32 | $2750 | 317 | 1 |
| 2021 | 28 MPG | 25 | 32 | $2750 | 321 | 1 |
| 2020 | 27 MPG | 24 | 32 | $2850 | 324 | 1 |
| 2019 | 28 MPG | 25 | 32 | $2750 | 321 | 1 |
| 2011 | 22 MPG | 18.5 | 28 | $3500 | 404 | 2 |
| 2010 | 22 MPG | 18 | 28 | $3500 | 404 | 2 |
| 2009 | 22 MPG | 19 | 28.5 | $3500 | 404 | 2 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 105 two seaters models tracked here, the BMW Z4 sDrive30i ranks 9 on current figures, against a class average of 21.3 MPG.
Closest more-efficient alternatives in the same class: Mazda MX-5 (29), Honda CR-Z (34.5), smart fortwo cabriolet (34.5), smart fortwo coupe (34.5), Honda Civic CRX HF (41).
Tailpipe CO₂ is rated at 312 grams per mile, which works out to roughly 4.7 tonnes a year at 15,000 miles.
Questions
What MPG does the BMW Z4 sDrive30i get?
The 2026 BMW Z4 sDrive30i is rated at 28 MPG combined by the EPA — 25 city and 33 highway. Across all 11 model years in the database it averages 26.3 MPG, ranging from 22 to 28 depending on year and trim.
How much does a BMW Z4 sDrive30i cost in fuel per year?
At 28 MPG and 15,000 miles a year, it burns about 536 gallons — roughly $1714 a year with fuel at $3.20 a gallon, or $0.114 per mile. The EPA's own published annual figure for the 2026 model is $2750.
Has the BMW Z4 sDrive30i become more efficient over time?
Yes. It has gone from 22 MPG in 2009 to 28 in 2026 — an improvement of 6 MPG, or 27% across 11 model years.
Is the BMW Z4 sDrive30i efficient for its class?
It ranks 9 of 105 in the Two Seaters class on current figures, against a class average of 21.3 MPG. That is 6.7 better than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.