The 22 MPG combined fuel economy rating for the 2020 Porsche Cayman S with its 2.5L turbocharged four-cylinder engine isn’t going to win any awards. But frankly, outright fuel efficiency is a tertiary concern at best for the buyer shopping for a mid-engine sports car that prioritizes handling, driver engagement, and exclusivity.

City and highway performance

Breaking down the EPA figures further, the 2020 Cayman S achieves 19 MPG in the city and 25 MPG on the highway. The city figure reflects the demands of stop-and-go traffic, where the engine spends more time idling or accelerating from a standstill. The turbocharged nature of the engine can also contribute to lower city MPG if the driver is frequently using the boost. The 25 MPG highway figure is more indicative of settled cruising, where the engine can operate more efficiently, particularly with the seven-speed automatic transmission (AM-S7) finding the optimal gear for the conditions. While 25 MPG isn’t stellar, it’s perfectly acceptable for weekend road trips where experiencing backroads will inevitably impact the fuel economy.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2020 Porsche Cayman S will be $2,650. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. This number provides a standardized benchmark for comparison against other vehicles. However, your actual fuel costs will vary depending on your individual driving habits, the type of fuel you use, and local fuel prices. If you drive aggressively, spend most of your time in city traffic, or consistently use premium fuel (which is recommended for the Cayman S), you can expect your annual fuel bill to exceed this estimate. You can find all Porsche fuel economy data on this site.

Real-world expectations

Despite the EPA estimates, drivers often experience different fuel economy in real-world conditions. Several factors influence the actual MPG you’ll achieve. An aggressive driving style, often associated with a sports car like the Cayman S, will have a significant impact. If you use Sport or Sport Plus modes, the car will hold gears longer, increasing engine RPMs and, consequently, fuel consumption. Likewise, frequent hard acceleration will also reduce fuel economy. Conversely, drivers who prioritize smooth acceleration, anticipate traffic flow, and use cruise control on the highway can often achieve figures closer to the EPA estimates.

How it compares

Compared to its competitors, the fuel economy of the 2020 Porsche Cayman S aligns with the expectations for its class. The BMW M2 Competition, with its 3.0L inline-six, delivers around 20 MPG combined. The Audi TTS, while offering similar performance from a turbocharged four-cylinder, achieves approximately 23 MPG combined. The difference, while seemingly small on paper, could add up over the long term. The Lotus Emira, with its available supercharged V6, comes in around 19 MPG combined. The Cayman S buyer likely accepts the fuel economy trade-off for the car’s superior handling balance, quicker steering, and a more upscale interior. Exploring CAYMAN MPG across all years can give you a fuller picture of fuel trends.

Tips to maximize efficiency

While outright fuel efficiency might not be the primary concern for a Cayman S owner, there are still several steps you can take to optimize your MPG. The first and most obvious is to adopt a smoother driving style. Avoid aggressive acceleration and braking, and try to anticipate traffic conditions to minimize unnecessary speed changes. The Cayman S rewards smooth inputs, both in terms of performance and fuel economy.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which directly impacts fuel consumption. Check your tire pressures regularly, especially before long trips, as tires naturally lose air over time. Refer to the sticker inside your driver’s side door for the correct tire pressure specifications.

Consider using the standard driving mode for everyday commuting and errands. While Sport and Sport Plus modes offer enhanced throttle response and handling, they also hold gears for longer, increasing engine RPM and burning more fuel. The standard mode still provides ample performance for most driving situations while optimizing fuel efficiency.

Avoid unnecessary idling. If you’re stopped for more than a minute, turn off the engine. Modern cars, including the Cayman S, are designed to restart quickly and efficiently; idling for extended periods consumes fuel without actually moving the vehicle. This is especially important in urban environments.