2018 Porsche BoxsterFuel Economy & MPG Ratings

Gasoline Two SeatersRear-Wheel Drive

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Automatic (AM-S7)

Premium

City

Hwy

Comb

Fuel cost: $3,250/yr

Manual 6-spd

Premium

City

Hwy

Comb

Fuel cost: $3,400/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Automatic (AM-S7)	Premium	22	29	25	$3,250
Manual 6-spd	Premium	21	28	24	$3,400

Annual Fuel Cost

$3,250

Based on gasoline at $3.67/gal, 15,000 miles/year

5-Year Fuel Savings

$-4,250

vs. average new vehicle

EPA Fuel Economy Score: 5/10

GHG Score: 5/10

Environment

CO₂ Tailpipe Emissions: 353 g/mile
Annual Petroleum Consumption: 11.9 barrels

Specifications

Engine: 2L 4-cyl
Transmission: 6-speed Manual
Drivetrain: RWD
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: 2L, 4-cylinder
Induction Type: Direct Injection
Efficiency Tech: Auto Start-Stop
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$2,694/yr

California

$5.957/gal$3,574/yr

Texas

$3.888/gal$2,333/yr

Florida

$4.136/gal$2,482/yr

New York

$4.522/gal$2,713/yr

Ohio

$4.510/gal$2,706/yr

Washington

$5.591/gal$3,355/yr

Colorado

$4.618/gal$2,771/yr

Minnesota

$4.344/gal$2,606/yr

Massachusetts

$4.448/gal$2,669/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$2,694/yr	—
California	$5.957/gal	$3,574/yrHIGHEST	+$880
Texas	$3.888/gal	$2,333/yrLOWEST	$-361
Florida	$4.136/gal	$2,482/yr	$-212
New York	$4.522/gal	$2,713/yr	+$19
Ohio	$4.510/gal	$2,706/yr	+$12
Washington	$5.591/gal	$3,355/yr	+$661
Colorado	$4.618/gal	$2,771/yr	+$77
Minnesota	$4.344/gal	$2,606/yr	$-88
Massachusetts	$4.448/gal	$2,669/yr	$-25