BMW 430i Convertible
30 MPG The 2027 BMW 430i Convertible is EPA-rated at 30 MPG combined (27 city / 35 highway). Over 15,000 miles a year that is about 500 gallons, $1600 a year in fuel, or $0.107 per mile at $3.20/gal.
Across its full 2017–2027 run it averages 28.1 MPG, improving by 3 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 | $0.083 | $833 | $1250 | $1667 |
| $3.00/gal | $0.100 | $1000 | $1500 | $2000 |
| $3.20/gal | $0.107 | $1067 | $1600 | $2133 |
| $3.50/gal | $0.117 | $1167 | $1750 | $2333 |
| $4.00/gal | $0.133 | $1333 | $2000 | $2667 |
| $4.50/gal | $0.150 | $1500 | $2250 | $3000 |
| $5.00/gal | $0.167 | $1667 | $2500 | $3333 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2027 | 30 MPG | 27 | 35 | $2550 | 295 | 1 |
| 2026 | 30 MPG | 27 | 35 | $2550 | 295 | 1 |
| 2025 | 30 MPG | 27 | 35 | $2550 | 295 | 1 |
| 2024 | 28 MPG | 25 | 34 | $2750 | 312 | 1 |
| 2023 | 28 MPG | 25 | 34 | $2750 | 313 | 1 |
| 2022 | 28 MPG | 25 | 34 | $2750 | 312 | 1 |
| 2021 | 27 MPG | 24 | 33 | $2850 | 326 | 1 |
| 2020 | 27 MPG | 23 | 34 | $2850 | 327 | 1 |
| 2019 | 27 MPG | 24 | 34 | $2850 | 324 | 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 430i Convertible ranks 25 on current figures, against a class average of 24.1 MPG.
Closest more-efficient alternatives in the same class: Honda Civic (30.3), Ford Festiva (30.5), Ford Fiesta FWD (30.5), BMW 430i Coupe (31), Daihatsu Charade (31).
Tailpipe CO₂ is rated at 295 grams per mile, which works out to roughly 4.4 tonnes a year at 15,000 miles.
Questions
What MPG does the BMW 430i Convertible get?
The 2027 BMW 430i Convertible is rated at 30 MPG combined by the EPA — 27 city and 35 highway. Across all 11 model years in the database it averages 28.1 MPG, ranging from 27 to 30 depending on year and trim.
How much does a BMW 430i Convertible cost in fuel per year?
At 30 MPG and 15,000 miles a year, it burns about 500 gallons — roughly $1600 a year with fuel at $3.20 a gallon, or $0.107 per mile. The EPA's own published annual figure for the 2027 model is $2550.
Has the BMW 430i Convertible become more efficient over time?
Yes. It has gone from 27 MPG in 2017 to 30 in 2027 — an improvement of 3 MPG, or 11% across 11 model years.
Is the BMW 430i Convertible efficient for its class?
It ranks 25 of 229 in the Subcompact Cars class on current figures, against a class average of 24.1 MPG. That is 5.9 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.