BMW 318i/318is
23.5 MPG The 1998 BMW 318i/318is is EPA-rated at 23.5 MPG combined (19.5 city / 28.5 highway). Over 15,000 miles a year that is about 638 gallons, $2043 a year in fuel, or $0.136 per mile at $3.20/gal.
Across its full 1993–1998 run it averages 22.5 MPG, improving by 1.5 MPG over 6 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.106 | $1064 | $1596 | $2128 |
| $3.00/gal | $0.128 | $1277 | $1915 | $2553 |
| $3.20/gal | $0.136 | $1362 | $2043 | $2723 |
| $3.50/gal | $0.149 | $1489 | $2234 | $2979 |
| $4.00/gal | $0.170 | $1702 | $2553 | $3404 |
| $4.50/gal | $0.191 | $1915 | $2872 | $3830 |
| $5.00/gal | $0.213 | $2128 | $3191 | $4255 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 1998 | 23.5 MPG | 19.5 | 28.5 | $2650 | 378 | 2 |
| 1997 | 23 MPG | 19.5 | 28.5 | $3350 | 387 | 4 |
| 1996 | 22.5 MPG | 19.5 | 28.5 | $3425 | 395 | 2 |
| 1995 | 22 MPG | 18.5 | 27.5 | $3500 | 405 | 2 |
| 1994 | 22 MPG | 18.8 | 27.5 | $3500 | 404 | 4 |
| 1993 | 22 MPG | 19 | 27.5 | $3500 | 404 | 2 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 229 subcompact cars models tracked here, the BMW 318i/318is ranks 99 on current figures, against a class average of 24.2 MPG.
Closest more-efficient alternatives in the same class: BMW 230i xDrive Convertible (24), BMW 640i Coupe (24), BMW 840i Convertible (24), BMW 840i Coupe (24), BMW 840i xDrive Convertible (24).
Tailpipe CO₂ is rated at 378 grams per mile, which works out to roughly 5.7 tonnes a year at 15,000 miles.
Questions
What MPG does the BMW 318i/318is get?
The 1998 BMW 318i/318is is rated at 23.5 MPG combined by the EPA — 19.5 city and 28.5 highway. Across all 6 model years in the database it averages 22.5 MPG, ranging from 21 to 24 depending on year and trim.
How much does a BMW 318i/318is cost in fuel per year?
At 23.5 MPG and 15,000 miles a year, it burns about 638 gallons — roughly $2043 a year with fuel at $3.20 a gallon, or $0.136 per mile. The EPA's own published annual figure for the 1998 model is $2650.
Has the BMW 318i/318is become more efficient over time?
Yes. It has gone from 22 MPG in 1993 to 23.5 in 1998 — an improvement of 1.5 MPG, or 7% across 6 model years.
Is the BMW 318i/318is efficient for its class?
It ranks 99 of 229 in the Subcompact Cars class on current figures, against a class average of 24.2 MPG. That is 0.7 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.