Against 500 other 4-cyl cars rated 2016–2018, the 320i sits right on their 27.3 mpg average.
Every BMW 320i engine, compared
The BMW 320i 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 | 23.2 / 35 | 2013–2018 | $1,371 |
What that actually costs
Against its rivals in the same model years, the Toyota Corolla gets 34.7 mpg, the Lexus IS 24 mpg and the Ford Focus 32.5 mpg, next to 28 mpg for the 2018 320i.
| Measure | Value |
|---|---|
| Cost per mile (2018) | $0.114 |
| Fuel per year | $1,371 |
| Fuel over five years | $6,855 |
| Against other 4-cyl cars, 2016–2018 | −$36 a year |
| EPA's own estimate | $2,750 a year |
City or highway — who is this car for
The 2018 BMW 320i gives up 11 mpg in town: 35 on the highway against 24 in the city, $503 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2018) | 24 mpg | $1,600 a year if you only drive in town |
| Highway | 35 mpg | $1,097 a year if you mostly commute |
| Gap | +11 mpg (46%) | Wide — this car dislikes traffic |
How the 320i changed over the years
Combined figure across the 6 model years the 320i was rated in, all of them at 28 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2018 | 24 / 35 | 1 | $1,371 | |
| 2017 | 23 / 35 | 1 | $1,371 | |
| 2016 | 23 / 35 | 1 | $1,371 | |
| 2015 | 23 / 35 | 1 | $1,371 | |
| 2014 | 23 / 35 | 1 | $1,371 | |
| 2013 | 23 / 35 | 1 | $1,371 |
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 320i — 1 engine across 2013–2018. 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 $2,750. Full method.
Frequently asked questions
What mpg does the 2018 BMW 320i get?
28 mpg combined, 24 city and 35 highway, per EPA. Across every year since 2013 the 320i has averaged 28 mpg.
Is the 2018 320i more efficient than the 2017?
About the same: 28 against 28 mpg combined.
Does the 320i get better gas mileage than the Toyota Corolla?
No: 28 mpg for the 2018 320i against 34.7 for the 2019 Toyota Corolla, about $264 a year more to run.
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