2015 Porsche 911 Carrera 4S CabrioletFuel Economy & MPG Ratings
Gasoline Minicompact Cars4-Wheel Drive
City
18
MPG
Highway
26
MPG
Combined
21
MPG
Trim Comparison
Manual 7-spd
Premium
City
18
Hwy
26
Comb
21
Fuel cost: $3,900/yr
Automatic (AM-S7)
Premium
City
19
Hwy
26
Comb
21
Fuel cost: $3,900/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Manual 7-spd | Premium | 18 | 26 | 21 | $3,900 |
| Automatic (AM-S7) | Premium | 19 | 26 | 21 | $3,900 |
Annual Fuel Cost
$3,900
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-7,500
vs. average new vehicle
EPA Fuel Economy Score: 5/10
GHG Score: 5/10
Environment
- CO₂ Tailpipe Emissions
- 423 g/mile
- Annual Petroleum Consumption
- 14.2 barrels
Specifications
- Engine
- 3.8L 6-cyl
- Transmission
- 7-speed Manual
- Drivetrain
- 4WD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 3.8L, 6-cylinder
- Induction Type
- Direct Injection
- Fuel Type
- Premium Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$3,207/yr
California
$5.957/gal$4,255/yr
Texas
$3.888/gal$2,777/yr
Florida
$4.136/gal$2,954/yr
New York
$4.522/gal$3,230/yr
Ohio
$4.510/gal$3,221/yr
Washington
$5.591/gal$3,994/yr
Colorado
$4.618/gal$3,299/yr
Minnesota
$4.344/gal$3,103/yr
Massachusetts
$4.448/gal$3,177/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $3,207/yr | — |
| California | $5.957/gal | $4,255/yrHIGHEST | +$1,048 |
| Texas | $3.888/gal | $2,777/yrLOWEST | $-430 |
| Florida | $4.136/gal | $2,954/yr | $-253 |
| New York | $4.522/gal | $3,230/yr | +$23 |
| Ohio | $4.510/gal | $3,221/yr | +$14 |
| Washington | $5.591/gal | $3,994/yr | +$787 |
| Colorado | $4.618/gal | $3,299/yr | +$92 |
| Minnesota | $4.344/gal | $3,103/yr | $-104 |
| Massachusetts | $4.448/gal | $3,177/yr | $-30 |
Calculated at 15,000 miles/year (EPA standard assumption) using 21 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Porsche 911 Carrera 4S Cabriolet MPG History
See how this model's fuel economy changed by year