Against 247 other V6 cars rated 2024–2026, the M240i beats their 21 mpg average by 5 mpg, about $352 a year.
Every BMW M240i engine, compared
The BMW M240i was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3L 6-cyl | 21.9 / 31.2 | 2017–2026 | $1,524 |
What that actually costs
Against its rivals in the same model years, the Bentley Continental gets 19 mpg, the Lexus RC 22.3 mpg and the Audi RS 5 20 mpg, next to 26 mpg for the 2026 M240i. The M240i is the cheapest of them to run: $544 a year less than the Bentley Continental.
| Measure | Value |
|---|---|
| Cost per mile (2026) | $0.123 |
| Fuel per year | $1,477 |
| Fuel over five years | $7,385 |
| Against other V6 cars, 2024–2026 | −$352 a year |
| EPA's own estimate | $3,055 a year |
City or highway — who is this car for
The 2026 BMW M240i gives up 9 mpg in town: 32 on the highway against 23 in the city, $470 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2026) | 23 mpg | $1,670 a year if you only drive in town |
| Highway | 32 mpg | $1,200 a year if you mostly commute |
| Gap | +9 mpg (39%) | Wide — this car dislikes traffic |
How the M240i changed over the years
The M240i peaked in 2026 at 26 mpg (23 city, 32 highway) and was at its thirstiest in 2021 at 24 — 2 mpg apart, or $123 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 23 / 32 | 1 | $1,477 | |
| 2025 | 23 / 32 | 1 | $1,477 | |
| 2024 | 22 / 32 | 1 | $1,477 | |
| 2023 | 22 / 32 | 1 | $1,477 | |
| 2022 | 23 / 32 | 1 | $1,477 | |
| 2021 | 21 / 30 | 1 | $1,600 | |
| 2020 | 22 / 30 | 1 | $1,536 | |
| 2019 | 21 / 30 | 1 | $1,600 | |
| 2018 | 21 / 30 | 1 | $1,600 | |
| 2017 | 21 / 32 | 1 | $1,536 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 10 EPA ratings of the BMW M240i — 1 engine across 2017–2026. 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 $3,055. Full method.
Frequently asked questions
What mpg does the 2026 BMW M240i get?
26 mpg combined, 23 city and 32 highway, per EPA. Across every year since 2017 the M240i has averaged 25.2 mpg.
Is the 2026 M240i more efficient than the 2025?
About the same: 26 against 26 mpg combined.
Which M240i year has the best gas mileage?
The 2026, at 26 mpg combined (23 city, 32 highway), which is also the latest model year we hold.
Does the M240i get better gas mileage than the Bentley Continental?
Yes: 26 mpg for the 2026 M240i against 19 for the 2026 Bentley Continental, about $544 a year less to run.
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