22 MPG combined is probably the last thing on the mind of anyone signing the papers for a 2024 Porsche 718 Boxster S. Let’s be frank, this isn’t a vehicle chosen for its ability to save fuel. It’s an open-top sports car crafted for driving pleasure, and the turbocharged 2.5L flat-four is a key part of that experience. Some buyers might cross-shop a Boxster S with more practical options, but those prioritizing fuel economy above all else simply aren’t the target demographic. This is a car for enthusiasts, weekend drivers, and those who value a visceral driving experience above all else, and they’re willing to pay at the pump for it.

City and highway performance

The EPA estimates the 718 Boxster S achieves 19 MPG in the city and 25 MPG on the highway. While neither figure is particularly outstanding, they do reflect the engine’s performance profile. The turbocharger spools up quickly, providing ample low-end torque, which contributes to the city driving figure. The highway MPG, while still moderate, suggests a reasonable degree of efficiency when cruising thanks to the seven-speed dual-clutch automatic transmission (PDK in Porsche parlance) helping to keep the engine in its sweet spot. Remember aggressive driving will significantly impact these numbers. Smooth inputs are key to experiencing the advertised economy.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2024 Porsche 718 Boxster S is $2,650. This figure is based on driving 15,000 miles per year, with fuel prices reflecting a national average. Keep in mind fuel prices can vary greatly by region, and driving habits will significantly influence the actual amount spent on gasoline. Someone who primarily uses their Boxster S for weekend drives might spend less, while a daily commuter with a heavy foot could easily exceed the EPA’s estimate. This number is useful for comparison against other vehicles, and factors into the total cost of ownership. If you are curious about 718 MPG across all years, that can help in your purchasing decision.

Real-world expectations

While the EPA provides a standardized benchmark, real-world mileage often deviates from the official figures. Expect to see numbers slightly below the EPA estimates, especially if you frequently engage the car’s sportier driving modes. The Porsche PDK transmission encourages spirited driving, and the temptation to unleash the 350 horsepower is ever-present. This car begs to be driven hard, and frequent acceleration and deceleration will take a toll on fuel economy. Consider yourself fortunate if you consistently achieve the EPA’s combined figure.

How it compares

Competitors to the Boxster S, like the BMW Z4 M40i, achieve slightly better fuel economy figures: 25 MPG combined, 23 MPG city, and 31 MPG highway. The Jaguar F-TYPE P300 offers a comparable 25 MPG combined, but sacrifices the top-down experience. Even within the Porsche family, the base 718 Boxster with its smaller engine returns a slightly better 24 MPG combined. However, the Boxster S offers a significant performance advantage, which is a key factor for many buyers. Those wanting to compare all Porsche fuel economy data, will see where the 718 Boxster S falls against the entire lineup.

Tips to maximize efficiency

Employ smooth driving techniques, avoiding sudden acceleration and hard braking. This is crucial for any vehicle, but particularly relevant for a turbocharged engine like the one in the 718 Boxster S. A gentle foot on the accelerator translates directly to less fuel consumption.

Take advantage of the car’s driving modes. Selecting “Normal” or even the “Individual” mode with a focus on efficiency can improve fuel economy, especially in stop-and-go traffic. Sport and Sport+ modes sharpen throttle response and hold gears longer, sacrificing efficiency for performance.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, lowering fuel economy. Check your tire pressures regularly and maintain them at the recommended levels indicated on the door jamb sticker.

Avoid unnecessary weight in the car. Carrying extra weight increases the engine’s workload, leading to higher fuel consumption. Remove any items you don’t need from the trunk and passenger compartment.

Consider the traffic conditions. Planning your trips to avoid peak congestion can significantly improve fuel economy. Stop-and-go driving wastes fuel, so avoiding rush hour traffic when possible is beneficial.