BMW 230i Convertible
27 MPG The 2021 BMW 230i Convertible is EPA-rated at 27 MPG combined (23 city / 33 highway). Over 15,000 miles a year that is about 556 gallons, $1778 a year in fuel, or $0.119 per mile at $3.20/gal.
Across its full 2017–2021 run it averages 27 MPG, essentially flat across 5 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 | $0.093 | $926 | $1389 | $1852 |
| $3.00/gal | $0.111 | $1111 | $1667 | $2222 |
| $3.20/gal | $0.119 | $1185 | $1778 | $2370 |
| $3.50/gal | $0.130 | $1296 | $1944 | $2593 |
| $4.00/gal | $0.148 | $1481 | $2222 | $2963 |
| $4.50/gal | $0.167 | $1667 | $2500 | $3333 |
| $5.00/gal | $0.185 | $1852 | $2778 | $3704 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2021 | 27 MPG | 23 | 33 | $2850 | 333 | 1 |
| 2020 | 27 MPG | 23 | 34 | $2850 | 327 | 1 |
| 2019 | 27 MPG | 23 | 33 | $2850 | 333 | 1 |
| 2018 | 27 MPG | 24 | 34 | $2850 | 324 | 1 |
| 2017 | 27 MPG | 23 | 34 | $2850 | 324 | 1 |
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 229 subcompact cars models tracked here, the BMW 230i Convertible ranks 51 on current figures, against a class average of 24.2 MPG.
Closest more-efficient alternatives in the same class: Dodge Colt (27.3), Plymouth Colt (27.3), Acura Integra (28), Audi A3 quattro (28), BMW 230i xDrive Coupe (28).
Tailpipe CO₂ is rated at 333 grams per mile, which works out to roughly 5.0 tonnes a year at 15,000 miles.
Questions
What MPG does the BMW 230i Convertible get?
The 2021 BMW 230i Convertible is rated at 27 MPG combined by the EPA — 23 city and 33 highway. Across all 5 model years in the database it averages 27 MPG, ranging from 27 to 27 depending on year and trim.
How much does a BMW 230i Convertible cost in fuel per year?
At 27 MPG and 15,000 miles a year, it burns about 556 gallons — roughly $1778 a year with fuel at $3.20 a gallon, or $0.119 per mile. The EPA's own published annual figure for the 2021 model is $2850.
Has the BMW 230i Convertible become more efficient over time?
Barely. It sits at 27 MPG today against 27 in 2017 — essentially flat across 5 model years, with efficiency gains offset by weight and power creep.
Is the BMW 230i Convertible efficient for its class?
It ranks 51 of 229 in the Subcompact Cars class on current figures, against a class average of 24.2 MPG. That is 2.8 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.