The BMW 328d does 35.8 mpg combined (31 city, 42.8 highway), which works out to about $1,073 a year in fuel at $3.20 a gallon and 12,000 miles. Against other 4-cyl cars it sits above the average of 25.7 mpg.
Every BMW 328d engine, compared
The BMW 328d 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 |
|---|---|---|---|---|
| 2L 4-cyl | 31 / 42.8 | 2014–2018 | $1,073 |
What that actually costs
The BMW 328d burns a gallon every 35.8 miles, so 12,000 miles takes about 335 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.089 |
| Fuel per year | $1,073 |
| Fuel over five years | $5,365 |
| Against other 4-cyl cars | −$421 a year |
| EPA's own estimate | $2,170 a year |
City or highway — who is this car for
The BMW 328d gives up 11.8 mpg the moment you leave the motorway — 42.8 out there against 31 in town, a 38% drop worth $342 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 | 31 mpg | $1,239 a year if you only drive in town |
| Highway | 42.8 mpg | $897 a year if you mostly commute |
| Gap | +11.8 mpg (38%) | Wide — this car dislikes traffic |
How the 328d changed over the years
The 328d peaked in 2018 at 36 mpg (31 city, 43 highway) and was at its thirstiest in 2016 at 35 — 1 mpg apart, or $30 a year in fuel between buying one year and the other. The 2018 car does 36. 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 |
|---|---|---|---|---|
| 2018 | 31 / 43 | 1 | $1,067 | |
| 2017 | 31 / 43 | 1 | $1,067 | |
| 2016 | 31 / 42 | 1 | $1,097 | |
| 2015 | 31 / 43 | 1 | $1,067 | |
| 2014 | 31 / 43 | 1 | $1,067 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 5 EPA ratings of the BMW 328d — 1 engine across 2014–2018. 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 $2,170. Full method.
Frequently asked questions
What mpg does the BMW 328d get?
35.8 mpg combined on average — 31 in the city and 42.8 on the highway, per EPA ratings across 2014–2018.
How much does a BMW 328d cost in fuel per year?
About $1,073 at 12,000 miles and $3.20 a gallon — roughly $5,365 over five years, or 0.089 dollars a mile.
Which 328d engine is the most economical?
The 2L 4-cyl at 35.8 mpg.
Is the 328d good on fuel compared with similar cars?
Against other 4-cyl cars it sits above the average of 25.7 mpg, computed across 4765 ratings.
Are these real-world 328d 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 328d is $2,170 against the $1,073 we compute at 12,000 miles. Expect a little worse in practice: the spread between the city and highway figures is smaller than the spread between two drivers of the same one.
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