Against 181 other V8 cars rated 2023–2025, the M8 sits right on their 16.8 mpg average.
Every BMW M8 engine, compared
The BMW M8 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 |
|---|---|---|---|---|
| 4.4L 8-cyl | 15 / 21.5 | 2020–2025 | $2,259 |
What that actually costs
Against its rivals in the same model years, the Bentley Continental gets 18.3 mpg, the Lexus LC 22.4 mpg and the Mercedes-Benz CLE 27.3 mpg, next to 17 mpg for the 2025 M8. The M8 costs the most of them to run: $852 a year more than the Mercedes-Benz CLE.
| Measure | Value |
|---|---|
| Cost per mile (2025) | $0.188 |
| Fuel per year | $2,259 |
| Fuel over five years | $11,295 |
| Against other V8 cars, 2023–2025 | −$27 a year |
| EPA's own estimate | $4,550 a year |
City or highway — who is this car for
The 2025 BMW M8 gives up 7 mpg in town: 22 on the highway against 15 in the city, $815 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2025) | 15 mpg | $2,560 a year if you only drive in town |
| Highway | 22 mpg | $1,745 a year if you mostly commute |
| Gap | +7 mpg (47%) | Wide — this car dislikes traffic |
How the M8 changed over the years
Combined figure across the 6 model years the M8 was rated in, all of them at 17 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2025 | 15 / 22 | 1 | $2,259 | |
| 2024 | 15 / 22 | 1 | $2,259 | |
| 2023 | 15 / 22 | 1 | $2,259 | |
| 2022 | 15 / 21 | 1 | $2,259 | |
| 2021 | 15 / 21 | 1 | $2,259 | |
| 2020 | 15 / 21 | 1 | $2,259 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 6 EPA ratings of the BMW M8 — 1 engine across 2020–2025. 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 $4,550. Full method.
Frequently asked questions
What mpg does the 2025 BMW M8 get?
17 mpg combined, 15 city and 22 highway, per EPA. Across every year since 2020 the M8 has averaged 17 mpg.
Is the 2025 M8 more efficient than the 2024?
About the same: 17 against 17 mpg combined.
Does the M8 get better gas mileage than the Bentley Continental?
No: 17 mpg for the 2025 M8 against 18.3 for the 2026 Bentley Continental, about $161 a year more to run.
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