Porsche 911 GT3
15 MPG The 2026 Porsche 911 GT3 is EPA-rated at 15 MPG combined (13.5 city / 17.5 highway). Over 15,000 miles a year that is about 1000 gallons, $3200 a year in fuel, or $0.213 per mile at $3.20/gal.
Across its full 2007–2026 run it averages 16.5 MPG, falling by 3 MPG over 13 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 | $0.167 | $1667 | $2500 | $3333 |
| $3.00/gal | $0.200 | $2000 | $3000 | $4000 |
| $3.20/gal | $0.213 | $2133 | $3200 | $4267 |
| $3.50/gal | $0.233 | $2333 | $3500 | $4667 |
| $4.00/gal | $0.267 | $2667 | $4000 | $5333 |
| $4.50/gal | $0.300 | $3000 | $4500 | $6000 |
| $5.00/gal | $0.333 | $3333 | $5000 | $6667 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2026 | 15 MPG | 13.5 | 17.5 | $5150 | 594 | 2 |
| 2024 | 15.5 MPG | 13.5 | 18.5 | $4975 | 572 | 2 |
| 2023 | 16 MPG | 14.5 | 18 | $4800 | 555 | 2 |
| 2022 | 16 MPG | 14.5 | 18 | $4800 | 555 | 2 |
| 2019 | 16.5 MPG | 14 | 20.5 | $4675 | 544 | 2 |
| 2018 | 16.5 MPG | 14 | 20.5 | $4675 | 544 | 2 |
| 2016 | 17 MPG | 15 | 20 | $4550 | 527 | 1 |
| 2015 | 17 MPG | 15 | 20 | $4550 | 527 | 1 |
| 2014 | 17 MPG | 15 | 20 | $4550 | 527 | 1 |
| 2011 | 16 MPG | 14 | 21 | $4800 | 555 | 1 |
| 2010 | 16 MPG | 14 | 21 | $4800 | 555 | 1 |
| 2008 | 18 MPG | 15 | 22 | $4300 | 494 | 1 |
| 2007 | 18 MPG | 15 | 22 | $4300 | 494 | 1 |
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 105 two seaters models tracked here, the Porsche 911 GT3 ranks 79 on current figures, against a class average of 21.4 MPG.
Closest more-efficient alternatives in the same class: Aston Martin V8 Vantage (15.5), Aston Martin V8 Vantage S (15.5), Lamborghini Gallardo Coupe (15.5), Audi R8 (16), Dodge Viper Convertible (16).
Tailpipe CO₂ is rated at 594 grams per mile, which works out to roughly 8.9 tonnes a year at 15,000 miles.
Questions
What MPG does the Porsche 911 GT3 get?
The 2026 Porsche 911 GT3 is rated at 15 MPG combined by the EPA — 13.5 city and 17.5 highway. Across all 13 model years in the database it averages 16.5 MPG, ranging from 15 to 18 depending on year and trim.
How much does a Porsche 911 GT3 cost in fuel per year?
At 15 MPG and 15,000 miles a year, it burns about 1000 gallons — roughly $3200 a year with fuel at $3.20 a gallon, or $0.213 per mile. The EPA's own published annual figure for the 2026 model is $5150.
Has the Porsche 911 GT3 become more efficient over time?
No — it has actually gone backwards, from 18 MPG in 2007 to 15 in 2026. That usually reflects the model growing heavier, more powerful, or moving upmarket rather than the engineering getting worse.
Is the Porsche 911 GT3 efficient for its class?
It ranks 79 of 105 in the Two Seaters class on current figures, against a class average of 21.4 MPG. That is 6.4 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.