Against 242 other V8 cars rated 2021–2023, the M550i beats their 17.1 mpg average by 2.9 mpg, about $326 a year.
Every BMW M550i engine, compared
The BMW M550i 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 | 17.2 / 25 | 2018–2023 | $1,939 |
What that actually costs
Against its rivals in the same model years, the Kia Stinger gets 22.5 mpg, the Toyota Crown 41 mpg and the Cadillac CT5 21.7 mpg, next to 20 mpg for the 2023 M550i. The M550i costs the most of them to run: $983 a year more than the Toyota Crown.
| Measure | Value |
|---|---|
| Cost per mile (2023) | $0.160 |
| Fuel per year | $1,920 |
| Fuel over five years | $9,600 |
| Against other V8 cars, 2021–2023 | −$326 a year |
| EPA's own estimate | $3,883 a year |
City or highway — who is this car for
The 2023 BMW M550i gives up 8 mpg in town: 25 on the highway against 17 in the city, $723 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2023) | 17 mpg | $2,259 a year if you only drive in town |
| Highway | 25 mpg | $1,536 a year if you mostly commute |
| Gap | +8 mpg (47%) | Wide — this car dislikes traffic |
How the M550i changed over the years
The M550i peaked in 2023 at 20 mpg (17 city, 25 highway) and was at its thirstiest in 2018 at 19 — 1 mpg apart, or $101 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2023 | 17 / 25 | 1 | $1,920 | |
| 2022 | 17 / 25 | 1 | $1,920 | |
| 2021 | 17 / 25 | 1 | $1,920 | |
| 2020 | 18 / 25 | 1 | $1,920 | |
| 2019 | 18 / 25 | 1 | $1,920 | |
| 2018 | 16 / 25 | 1 | $2,021 |
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 M550i — 1 engine across 2018–2023. 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 $3,883. Full method.
Frequently asked questions
What mpg does the 2023 BMW M550i get?
20 mpg combined, 17 city and 25 highway, per EPA. Across every year since 2018 the M550i has averaged 19.8 mpg.
Is the 2023 M550i more efficient than the 2022?
About the same: 20 against 20 mpg combined.
Which M550i year has the best gas mileage?
The 2023, at 20 mpg combined (17 city, 25 highway), which is also the latest model year we hold.
Does the M550i get better gas mileage than the Kia Stinger?
No: 20 mpg for the 2023 M550i against 22.5 for the 2023 Kia Stinger, about $213 a year more to run.
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