Porsche 911 Carrera GTS Cabriolet 2018 running costs in United States
Official U.S. EPA (fueleconomy.gov) figure for the 2018 Porsche 911 Carrera GTS Cabriolet: 22 mpg (US). At United States prices (US$1.08/L petrol), driving 12,000 miles a year costs about US$2,231 — US$0.12 per mile.
Official figures — 2018 Porsche 911 Carrera GTS Cabriolet
| Fuel type | Petrol |
|---|---|
| Official consumption | 22.0 mpg (US) |
| Engine size | 3,000 cc |
| Configurations in source data | 1 |
| Data source | U.S. EPA (fueleconomy.gov) |
What it costs to run in United States
| Petrol (22.0 mpg (US)) | US$2,231/year |
|---|---|
| state inspection | US$0.00/year |
| Estimated annual running cost | US$2,231/year ≈ US$186/month |
Assumes 12,000 miles a year and the current average United States prices shown above (BLS/FRED US city average regular, Jul 2026). Insurance is not included because it depends on your age, history and the policy — add it in the full ownership calculator. Servicing, tyres and repairs also vary by car and driver.
How it compares with other petrol cars in United States
The average petrol car in our United States dataset uses 11.2 L/100km. The 2018 Porsche 911 Carrera GTS Cabriolet uses 10.7 L/100km — about 4.5% less than that average, or roughly US$106 saved a year at 12,000 miles.
2018 Porsche 911 Carrera GTS Cabriolet — configurations in the official data
| Fuel | Consumption | CO₂ | Engine | Power | Source variant |
|---|---|---|---|---|---|
| Petrol | 10.7 L/100km | — | 3000 cc | — | 2 trims (representative median) |
Figures are the official certified values recorded in the U.S. EPA (fueleconomy.gov), grouped across 1 configuration. Real-world consumption is typically higher than the certified figure.
Related
Porsche 911 Carrera GTS Cabriolet 2017 · Porsche 911 Carrera GTS Cabriolet 2019 · Porsche 911 Carrera GTS Cabriolet 2016 · Porsche 911 Carrera GTS Cabriolet 2015 · All United States cars · Full United States running-cost calculator · United States fuel cost calculator
These are estimates built from official certified figures and current average prices. They are not financial advice. Verify the exact figure for the car you are buying — consumption varies by trim, tyres and driving style.