Porsche 718 Boxster S MPG by year — every rating on record
The Porsche 718 Boxster S has a combined EPA fuel economy rating for 5 model years, from 2021 to 2025. Across those years its best rated version returned 22 mpg (2021) and its thirstiest returned 21 mpg (2021). The EPA record holds 10 configurations for this nameplate, most recently a Two Seaters.
In the EPA record this nameplate also appears as 718 Boxster S and 718 Cayman S. The figures below cover every one of them.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2021 | 2 | 22 mpg | 21 mpg | #13 of 49 (75th pct) | Rear-Wheel Drive | Premium | Two Seaters |
| 2022 | 2 | 22 mpg | 21 mpg | #9 of 43 (81th pct) | Rear-Wheel Drive | Premium | Two Seaters |
| 2023 | 2 | 22 mpg | 21 mpg | #11 of 51 (80th pct) | Rear-Wheel Drive | Premium | Two Seaters |
| 2024 | 2 | 22 mpg | 21 mpg | #10 of 40 (77th pct) | Rear-Wheel Drive | Premium | Two Seaters |
| 2025 | 2 | 22 mpg | 21 mpg | #10 of 37 (75th pct) | Rear-Wheel Drive | Premium | Two Seaters |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The Porsche 718 Boxster S placed highest in 2022 at #9 of 43, and lowest in 2021 at #13 of 49. It spent 5 of its 5 ranked years in the top half of its class.
Every configuration on record
All 10 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 2.5L 4-cyl Rear-Wheel Drive Manual 6-spd Premium | SIDI, turbocharged, start-stop | 19 | 24 | 21 | 547.6 | 14.2 | $3,700 | 423 | 4/10 |
| 2025 | 2.5L 4-cyl Rear-Wheel Drive Automatic (AM-S7) Premium | SIDI, turbocharged, start-stop | 19 | 25 | 22 | 522.7 | 13.5 | $3,500 | 410 | 5/10 |
| 2024 | 2.5L 4-cyl Rear-Wheel Drive Manual 6-spd Premium | SIDI, turbocharged, start-stop | 19 | 24 | 21 | 547.6 | 14.2 | $3,700 | 423 | 4/10 |
| 2024 | 2.5L 4-cyl Rear-Wheel Drive Automatic (AM-S7) Premium | SIDI, turbocharged, start-stop | 19 | 25 | 22 | 522.7 | 13.5 | $3,500 | 410 | 5/10 |
| 2023 | 2.5L 4-cyl Rear-Wheel Drive Manual 6-spd Premium | SIDI, turbocharged, start-stop | 19 | 24 | 21 | 547.6 | 14.2 | $3,700 | 423 | 4/10 |
| 2023 | 2.5L 4-cyl Rear-Wheel Drive Automatic (AM-S7) Premium | SIDI, turbocharged, start-stop | 19 | 25 | 22 | 522.7 | 13.5 | $3,500 | 410 | 5/10 |
| 2022 | 2.5L 4-cyl Rear-Wheel Drive Manual 6-spd Premium | SIDI, turbocharged, start-stop | 19 | 24 | 21 | 547.6 | 14.2 | $3,700 | 423 | 4/10 |
| 2022 | 2.5L 4-cyl Rear-Wheel Drive Automatic (AM-S7) Premium | SIDI, turbocharged, start-stop | 19 | 25 | 22 | 522.7 | 13.5 | $3,500 | 410 | 5/10 |
| 2021 | 2.5L 4-cyl Rear-Wheel Drive Manual 6-spd Premium | SIDI, turbocharged, start-stop | 19 | 24 | 21 | 547.6 | 14.2 | $3,700 | 423 | 4/10 |
| 2021 | 2.5L 4-cyl Rear-Wheel Drive Automatic (AM-S7) Premium | SIDI, turbocharged, start-stop | 19 | 25 | 22 | 522.7 | 13.5 | $3,500 | 410 | 4/10 |
What 718 Boxster S fuel costs over a year
At the EPA's 11,500 miles a year, the 2025 Porsche 718 Boxster S burns 523 to 548 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $1,568 | $1,643 | $75 |
| $3.50/gal | $1,830 | $1,917 | $87 |
| $4.00/gal | $2,091 | $2,190 | $100 |
EPA’s own estimate for the 2025 model year is $3,500 to $3,700 a year in fuel, or $7,250 more than the average new vehicle over five years.
How it compares with other Two Seaters
Across the 263 nameplates EPA classifies as Two Seaters, the median best combined rating is 18 mpg. At 22 mpg the Porsche 718 Boxster S is 4 mpg better the median, which is worth about $407 a year at $3.50 a gallon.
- All Two Seaters rankings — every nameplate in the class, best to worst.
Other Porsche nameplates
Every Porsche model compared → — all nameplates ranked by best combined rating, with what each one costs a year.