- Newest year: 2020
- Gas
- Two-seaters
2017-2020 Porsche Cayman MPG & Fuel Cost
4 model years · 21–25 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 8 of 10 two-seater configurations, MY2020. Ranked against all rated configurations, not sales-weighted.
2017-2020 Porsche Cayman at a glance
The 2017-2020 Porsche Cayman covers 4 model years in the EPA database (22 configurations in all), rated 21–25 MPG combined. The newest model year, 2020, costs about $3,400 a year to fuel for its most efficient version, the Cayman 2.0L 4-cyl turbo RWD (24 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2018 and 2020; 2019 repeat the values of the year before. The best combined rating in the generation, 25 MPG, was reached in 2017, 2018 and 2019.
2017-2020 Porsche Cayman by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2020 | Gas | 21–24 MPG | $3,400–$3,830 | Ratings changed |
| 2019 | Gas | 21–25 MPG | $3,210–$3,770 | Same EPA ratings as 2018 |
| 2018 | Gas | 21–25 MPG | $3,210–$3,770 | Ratings changed |
| 2017 | Gas | 22–25 MPG | $3,210–$3,650 | First year |
What the 2020 Cayman 2.0L 4-cyl turbo RWD costs to drive
Per month
$283
$3,400 a year ÷ 12
Per 25 miles
$5.67
Per 100 miles
$22.67
Five years
$17,000
5 × the yearly cost, prices held at today's level
vs the two-seater median
$960less a year
Class median $4,360 a year, MY2020
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2020 Porsche Cayman MPG
Versus 2019: The most efficient configuration moves from 25 to 24 MPG, down 1. Its annual cost goes from $3,210 to $3,400, $190 more.
Gas configurations (6)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Cayman 2.0L 4-cyl turbo RWD Automatic (AM-S7) (Most efficient) | 2.0L 4-cyl turbo | RWD | 21 | 27 | 24 | $3,400 |
| T 2.0L 4-cyl turbo RWD Automatic (AM-S7) | 2.0L 4-cyl turbo | RWD | 21 | 27 | 23 | $3,450 |
| Cayman 2.0L 4-cyl turbo RWD Manual 6-spd | 2.0L 4-cyl turbo | RWD | 20 | 26 | 22 | $3,570 |
| T 2.0L 4-cyl turbo RWD Manual 6-spd | 2.0L 4-cyl turbo | RWD | 20 | 26 | 22 | $3,570 |
| S 2.5L 4-cyl turbo RWD Automatic (AM-S7) | 2.5L 4-cyl turbo | RWD | 19 | 25 | 22 | $3,720 |
| S 2.5L 4-cyl turbo RWD Manual 6-spd | 2.5L 4-cyl turbo | RWD | 19 | 24 | 21 | $3,830 |
6 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2019 Porsche Cayman MPG
Same EPA ratings as 2018
EPA lists the same ratings for the 2019 Porsche Cayman as for the 2018 model, so the configurations and costs are the ones in the 2018 section above.See 2018
2018 Porsche Cayman MPG
21–25 MPG · $3,210–$3,770/yr
Versus 2017: The most efficient configuration stays at 25 MPG. Its annual cost stays at $3,210.
Gas configurations (6)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Cayman 2.0L 4-cyl turbo RWD Automatic (AM-S7) (Most efficient) | 2.0L 4-cyl turbo | RWD | 22 | 29 | 25 | $3,210 |
| Cayman 2.0L 4-cyl turbo RWD Manual 6-spd | 2.0L 4-cyl turbo | RWD | 21 | 28 | 24 | $3,350 |
| S 2.5L 4-cyl turbo RWD Automatic (AM-S7) | 2.5L 4-cyl turbo | RWD | 21 | 28 | 24 | $3,370 |
| GTS 2.5L 4-cyl turbo RWD Automatic (AM-S7) | 2.5L 4-cyl turbo | RWD | 20 | 26 | 22 | $3,640 |
| S 2.5L 4-cyl turbo RWD Manual 6-spd | 2.5L 4-cyl turbo | RWD | 20 | 26 | 22 | $3,650 |
| GTS 2.5L 4-cyl turbo RWD Manual 6-spd | 2.5L 4-cyl turbo | RWD | 19 | 25 | 21 | $3,770 |
6 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2017 Porsche Cayman MPG
22–25 MPG · $3,210–$3,650/yr
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Cayman 2.0L 4-cyl turbo RWD Automatic (AM-S7) (Most efficient) | 2.0L 4-cyl turbo | RWD | 22 | 29 | 25 | $3,210 |
| Cayman 2.0L 4-cyl turbo RWD Manual 6-spd | 2.0L 4-cyl turbo | RWD | 21 | 28 | 24 | $3,350 |
| S 2.5L 4-cyl turbo RWD Automatic (AM-S7) | 2.5L 4-cyl turbo | RWD | 21 | 28 | 24 | $3,370 |
| S 2.5L 4-cyl turbo RWD Manual 6-spd | 2.5L 4-cyl turbo | RWD | 20 | 26 | 22 | $3,650 |
4 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 Cayman 2.0L 4-cyl turbo RWD: $4,060 in California and $2,950 in Texas, a $1,110 difference.
- California $4,060
- Washington $3,820
- New York $3,360
- Florida $3,110
- Texas $2,950
Similar cars
Closest combined MPG among MY2020 two-seater models.
Generations
Frequently asked questions
What gas mileage does the 2017-2020 Porsche Cayman get?
EPA rates the 2017-2020 Porsche Cayman at 21–25 MPG combined across 22 configurations and 4 model years. The most efficient version, the 2019 Cayman 2.0L 4-cyl turbo RWD, is rated 25 MPG (22 city, 29 highway).
Which years had the best MPG in the 2017-2020 Porsche Cayman?
The Cayman 2.0L 4-cyl turbo RWD reached the generation's best combined rating, 25 MPG, in 2017, 2018 and 2019. The lowest top rating, 24 MPG, was in 2020.
Did EPA ratings change during the 2017-2020 Porsche Cayman?
Yes. Ratings changed in 2018 and 2020. In 2019 the values repeat the year before.
How does the 2017-2020 Porsche Cayman compare with the previous generation?
The previous generation (2014-2016 Porsche Cayman) is rated 20–25 MPG combined and costs $3,180–$4,050 a year to fuel; the 2017-2020 model is rated 21–25 MPG and costs $3,210–$3,830 a year.
How much does it cost to fuel a 2020 Porsche Cayman per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the Cayman 2.0L 4-cyl turbo RWD costs about $3,400 a year. Across all 6 configurations the cost runs $3,400–$3,830 a year. That is a $430 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2020 Porsche Cayman 100 miles?
About $22.67 per 100 miles for the Cayman 2.0L 4-cyl turbo RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $22.67 and $25.53 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2020 Porsche Cayman more efficient in the city or on the highway?
The Cayman 2.0L 4-cyl turbo RWD is rated 21 city and 27 highway MPG, so it is more efficient on the highway, by 6 MPG.
How does the 2020 Porsche Cayman compare with other two-seater configurations?
The Cayman 2.0L 4-cyl turbo RWD costs about $3,400 a year to fuel, $960 less than the class median of $4,360, and less than 8 of 10 two-seater configurations. The comparison covers all 83 rated two-seater configurations for MY2020, not weighted by sales.
Is the 2020 Porsche Cayman different from the 2019 model?
The most efficient configuration moves from 25 to 24 MPG, down 1. Its annual cost goes from $3,210 to $3,400, $190 more. EPA lists 6 configurations for 2020 against 6 configurations for 2019. See the 2019 Porsche Cayman for that year.