Against 422 other 4-cyl cars rated 2023–2025, the 718 Boxster trails their 26.5 mpg average by 4 mpg, about $258 a year. Averaged over the years each was sold, the most economical engine since 2021, the 2L 4-cyl (2021–2025), does 24 mpg and the thirstiest, the 4L 6-cyl (2021–2025), 21: $229 a year apart.
Every Porsche 718 Boxster engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2L 4-cyl | 21 / 27 | 2021–2025 | $1,600 | |
| 4L 6-cyl | 19 / 24 | 2021–2025 | $1,829 |
What that actually costs
Against its rivals in the same model years, the Chevrolet Corvette gets 19 mpg, the Mercedes-Benz AMG GT 19.3 mpg and the Aston Martin Vantage 18 mpg, next to 22.5 mpg for the 2025 718 Boxster. The 718 Boxster is the cheapest of them to run: $426 a year less than the Aston Martin Vantage.
| Measure | Value |
|---|---|
| Cost per mile (2025) | $0.142 |
| Fuel per year | $1,707 |
| Fuel over five years | $8,535 |
| Against other 4-cyl cars, 2023–2025 | +$258 a year |
| EPA's own estimate | $3,425 a year |
City or highway — who is this car for
The 2025 Porsche 718 Boxster gives up 5.5 mpg in town: 25.5 on the highway against 20 in the city, $414 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2025) | 20 mpg | $1,920 a year if you only drive in town |
| Highway | 25.5 mpg | $1,506 a year if you mostly commute |
| Gap | +5.5 mpg (28%) | Typical for its type |
How the 718 Boxster changed over the years
Combined figure across the 5 model years the 718 Boxster was rated in, all of them at 22.5 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2025 | 20 / 25.5 | 2 | $1,707 | |
| 2024 | 20 / 25.5 | 2 | $1,707 | |
| 2023 | 20 / 25.5 | 2 | $1,707 | |
| 2022 | 20 / 25.5 | 2 | $1,707 | |
| 2021 | 20 / 25.5 | 2 | $1,707 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 10 EPA ratings of the Porsche 718 Boxster — 2 engines across 2021–2025. 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 $3,425. Full method.
Frequently asked questions
What mpg does the 2025 Porsche 718 Boxster get?
22.5 mpg combined, 20 city and 25.5 highway, per EPA; its 2 versions that year range from 21 to 24. Across every year since 2021 the 718 Boxster has averaged 22.5 mpg.
Is the 2025 718 Boxster more efficient than the 2024?
About the same: 22.5 against 22.5 mpg combined.
Does the 718 Boxster get better gas mileage than the Chevrolet Corvette?
Yes: 22.5 mpg for the 2025 718 Boxster against 19 for the 2026 Chevrolet Corvette, about $314 a year less to run.
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