23 MPG combined is a reasonable number for the 2023 Porsche 718 Cayman T, especially considering its singular focus. This isn’t a family car pretending to be a sports car; it’s a purebred sports car that achieves okay fuel economy. It’s a car bought by driving enthusiasts, often single or couples, who prioritize driving dynamics above all else. They know ultimate efficiency isn’t the goal, and performance comes with a cost at the pump. The Cayman T buyer is signing up for backroad thrills and that iconic Porsche badge, not a Prius-like fuel bill. They accept the trade-off.

City and highway performance

The 718 Cayman T’s EPA ratings break down to 21 MPG in the city and 27 MPG on the highway. The city figure reflects the realities of stop-and-go driving, with the engine working harder to overcome inertia at every light. The highway figure, obtained under more consistent speeds, allows the turbocharged 2.0-liter engine to settle into a more efficient rhythm.

While 27 MPG might seem respectable on paper, remember that achieving it requires resisting the urge to exploit the engine’s power on on-ramps and during overtaking maneuvers. This is easier said than done in a car as engaging as the Cayman T.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Porsche 718 Cayman T at exactly $2,500. This figure is based on driving 15,000 miles per year, using fuel prices that reflect a national average. The EPA’s methodology assumes a 45% highway and 55% city driving split.

Individual costs will fluctuate depending on driving style, local fuel prices, and annual mileage. If you spend more time in the city or have a heavier foot, expect to exceed the $2,500 estimate. Conversely, long highway trips at consistent speeds could lower your yearly expenses.

Real-world expectations

While the EPA figures provide a useful benchmark, real-world fuel economy for the 718 Cayman T is often determined by the driver’s personality. Those who frequently visit the track or push the car hard on twisty roads will likely see numbers below the combined 23 MPG rating. Conversely, those who primarily use the car for commuting and adopt a more relaxed driving style may achieve figures closer to, or even slightly above, the EPA estimate.

The seductive soundtrack and sharp throttle response of the Cayman T’s engine make disciplined driving a constant challenge. Looking at 718 MPG across all years, it’s clear that driving style plays a substantial role in achieving the car’s full efficiency potential.

How it compares

Compared to other sports cars, the 718 Cayman T’s fuel economy sits roughly in the middle of the pack. The BMW M240i, with its inline-six engine, manages around 26 MPG combined. Meanwhile, the Nissan Z, another rear-wheel-drive sports car, gets approximately 22 MPG combined. A base Chevrolet Corvette offers around 19 MPG city/27 MPG highway for a combined 22 MPG.

For a more direct comparison within the Porsche family, all Porsche fuel economy data shows that models like the Macan S are in the same ballpark, despite offering more space and practicality. However, potential buyers weighing decisions in this arena should note that the additional expense to get better fuel economy is not likely an acceptable trade off for improved driving dynamics when shopping in the sports car segment.

Tips to maximize efficiency

Use Porsche’s driving modes intelligently. Selecting “Normal” mode softens throttle response and encourages earlier upshifts from the seven-speed dual-clutch transmission (PDK), helping to conserve fuel during everyday driving. Resist the temptation to always drive in “Sport” or “Sport Plus” mode, as these modes prioritize performance over efficiency.

Minimize aggressive acceleration and braking. The 718 Cayman T’s lightweight construction and responsive engine make it easy to build speed quickly. Smooth, progressive inputs will not only improve fuel economy but also enhance the overall driving experience, in this case, more truly reflecting the sports car spirit.

Maintain optimal tire pressure. Check your tires regularly and inflate them to the recommended pressure listed on the door jamb. Underinflated tires increase rolling resistance, leading to reduced fuel economy and premature wear. The Cayman T’s precise handling also benefits from properly inflated tires.

Avoid unnecessary weight in the car. The lighter the vehicle, the less energy it takes to accelerate. Remove any items from the trunk and passenger compartment that aren’t essential. While the Cayman T isn’t designed for hauling cargo, minimizing weight can make a small but noticeable difference in fuel economy.