- Newest year: 2006
- Gas
- Two-seaters
2006 Porsche Cayman MPG & Fuel Cost
2 configurations · 21 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 7 of 10 two-seater configurations, MY2006. Ranked against all rated configurations, not sales-weighted.
2006 Porsche Cayman at a glance
The 2006 Porsche Cayman has 2 configurations in the EPA database, rated 21 MPG combined. The most efficient is the S 3.4L 6-cyl RWD at 21 MPG, which costs about $3,830 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). The S 3.4L 6-cyl RWD costs less to fuel than 7 of 10 two-seater configurations rated for MY2006 (class median $4,230 a year).
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
What the 2006 S 3.4L 6-cyl RWD costs to drive
Per month
$319
$3,830 a year ÷ 12
Per 25 miles
$6.38
Per 100 miles
$25.53
Five years
$19,150
5 × the yearly cost, prices held at today's level
vs the two-seater median
$400less a year
Class median $4,230 a year, MY2006
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2006 Porsche Cayman MPG
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| S 3.4L 6-cyl RWD Automatic 5-spd (Most efficient) | 3.4L 6-cyl | RWD | 18 | 25 | 21 | $3,830 |
| S 3.4L 6-cyl RWD Manual 6-spd | 3.4L 6-cyl | RWD | 18 | 26 | 21 | $3,830 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the S 3.4L 6-cyl RWD: $4,560 in California and $3,320 in Texas, a $1,240 difference.
- California $4,560
- Washington $4,290
- New York $3,780
- Florida $3,490
- Texas $3,320
Similar cars
Closest combined MPG among MY2006 two-seater models.
Generations
Frequently asked questions
What gas mileage does the 2006 Porsche Cayman get?
EPA rates the 2006 Porsche Cayman at 21 MPG combined across 2 configurations. The most efficient, the S 3.4L 6-cyl RWD, is rated 21 MPG combined (18 city / 25 highway).
How much does it cost to fuel a 2006 Porsche Cayman per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the S 3.4L 6-cyl RWD costs about $3,830 a year. Across all 2 configurations the cost runs $3,830 a year.
How much does it cost to drive a 2006 Porsche Cayman 100 miles?
About $25.53 per 100 miles for the S 3.4L 6-cyl RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026). That is the annual cost over 15,000 miles divided by 150.
Is the 2006 Porsche Cayman more efficient in the city or on the highway?
The S 3.4L 6-cyl RWD is rated 18 city and 25 highway MPG, so it is more efficient on the highway, by 7 MPG.
How does the 2006 Porsche Cayman compare with other two-seater configurations?
The S 3.4L 6-cyl RWD costs about $3,830 a year to fuel, $400 less than the class median of $4,230, and less than 7 of 10 two-seater configurations. The comparison covers all 69 rated two-seater configurations for MY2006, not weighted by sales.