The BMW 550i does 18.8 mpg combined (15.8 city, 23.9 highway), which works out to about $2,043 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 4.4L 8-cyl does 19.4 mpg while 4.8L 8-cyl does 18 — a difference of $154 a year. Against other V8 cars it sits above the average of 16.1 mpg.
Every BMW 550i engine, compared
Gas mileage on the BMW 550i ranges from 19.4 down to 18 depending on which engine sits under the bonnet — a spread of $154 a year across 2 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 4.4L 8-cyl | 16.4 / 24.6 | 2011–2017 | $1,979 | |
| 4.8L 8-cyl | 15 / 23 | 2006–2010 | $2,133 |
What that actually costs
The BMW 550i burns a gallon every 18.8 miles, so 12,000 miles takes about 638 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.170 |
| Fuel per year | $2,043 |
| Fuel over five years | $10,215 |
| Against other V8 cars | −$342 a year |
| EPA's own estimate | $4,113 a year |
City or highway — who is this car for
The BMW 550i gives up 8.1 mpg the moment you leave the motorway — 23.9 out there against 15.8 in town, a 51% drop worth $823 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 15.8 mpg | $2,430 a year if you only drive in town |
| Highway | 23.9 mpg | $1,607 a year if you mostly commute |
| Gap | +8.1 mpg (51%) | Wide — this car dislikes traffic |
How the 550i changed over the years
The 550i peaked in 2016 at 20 mpg (17 city, 25 highway) and was at its thirstiest in 2017 at 18 — 2 mpg apart, or $213 a year in fuel between buying one year and the other. The 2017 car does 18. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2017 | 15 / 24 | 1 | $2,133 | |
| 2016 | 17 / 25 | 1 | $1,920 | |
| 2015 | 17 / 25 | 1 | $1,920 | |
| 2014 | 17 / 25 | 1 | $1,920 | |
| 2013 | 17 / 25 | 1 | $1,920 | |
| 2012 | 15 / 23 | 1 | $2,133 | |
| 2011 | 17 / 25 | 1 | $1,920 | |
| 2010 | 15 / 23 | 1 | $2,133 | |
| 2009 | 15 / 23 | 1 | $2,133 | |
| 2008 | 15 / 23 | 1 | $2,133 | |
| 2007 | 15 / 23 | 1 | $2,133 | |
| 2006 | 15 / 23 | 1 | $2,133 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 12 EPA ratings of the BMW 550i — 2 engines across 2006–2017. 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 $4,113. Full method.
Frequently asked questions
What mpg does the BMW 550i get?
18.8 mpg combined on average — 15.8 in the city and 23.9 on the highway, per EPA ratings across 2006–2017.
How much does a BMW 550i cost in fuel per year?
About $2,043 at 12,000 miles and $3.20 a gallon — roughly $10,215 over five years, or 0.170 dollars a mile.
Which 550i engine is the most economical?
The 4.4L 8-cyl at 19.4 mpg, against 18 for the 4.8L 8-cyl — a difference of about $154 a year.
Is the 550i good on fuel compared with similar cars?
Against other V8 cars it sits above the average of 16.1 mpg, computed across 3323 ratings.
Are these real-world 550i figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the BMW 550i is $4,113 against the $2,043 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 20 and 18 mpg versions of this car is smaller than the spread between two drivers of the same one.
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