23 MPG combined will likely register as an afterthought for the typical 2021 Porsche 718 Boxster T buyer. This isn’t a commuter car; it’s a precision instrument designed to deliver driving thrills above all else. The 718 Boxster T, with its dialed-in suspension, responsive steering, and mid-engine balance, prioritizes the journey over saving gas. Buyers are trading maximum miles per gallon for maximum smiles per gallon, and they’re generally okay with that compromise.

City and highway performance

The EPA estimates suggest 21 MPG in the city and 27 MPG on the highway for the 2021 Porsche 718 Boxster T, equipped with the 2.0L turbocharged four-cylinder engine and the automatic (AM-S7) transmission. These figures reflect the engine’s character.

In urban environments, the frequent stop-and-go driving will naturally pull down fuel economy. On the open road, the 718 Boxster T can stretch its fuel reserves a little further, but the temptation to explore the upper reaches of the rev range will often negate any potential savings. The car’s short gearing also contributes to lower highway MPG than some competitors.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Porsche 718 Boxster T at $2,500. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. It’s a useful benchmark, but individual fuel costs will vary depending on driving habits, location (fuel prices vary significantly by state), and the type of fuel used. While the 718 Boxster T doesn’t explicitly require premium fuel, Porsche recommends it to achieve optimal performance and efficiency. Using lower octane fuel could negatively impact fuel economy and engine performance.

Real-world expectations

Real-world fuel economy for the 2021 Porsche 718 Boxster T is likely to fluctuate around the EPA estimates, but skew downwards, especially if the car is driven with enthusiasm, as it’s designed to be. Expect around 18-22 MPG in mixed driving, with the highway figure potentially reaching the EPA estimate if driven sedately on longer journeys.

However, the whole point of this car is to be driven hard, and owners who frequently indulge in spirited driving should anticipate fuel consumption to be noticeably higher, possibly dropping into the low teens. Given the car’s nature, most owners accept this as part of the ownership experience.

How it compares

Compared to other sports cars, the 2021 Porsche 718 Boxster T occupies a middle ground in terms of fuel economy. The BMW Z4 sDrive30i, for instance, achieves a slightly better 28 MPG combined, while offering a similar driving experience with a turbocharged four-cylinder engine. The base Chevrolet Corvette, while offering significantly more power from its V8 engine, manages a respectable 19 MPG combined, demonstrating that performance doesn’t always necessitate drastically lower fuel economy.

Even within the Porsche family, exploring 718 MPG across all years reveals similar variations based on engine and trim. The Boxster T’s position is acceptable to its target audience because it prioritizes driving dynamics and exclusivity over outright fuel savings. Buyers who prize fuel economy above all else would likely be shopping in a different segment entirely.

Tips to maximize efficiency

Use smooth acceleration and braking. The 718 Boxster T’s responsive throttle can tempt drivers to accelerate aggressively, but gentle inputs will conserve fuel. Anticipating traffic flow and avoiding sudden stops will also improve fuel economy.

The Porsche Doppelkupplung (PDK) transmission is very efficient in automatic mode, but manual mode gives you more control over gear selection and can be great for improving fuel economy. Don’t redline the gears if you are trying to save a few bucks and squeeze out every last tenth of a mile per gallon!

Maintain proper tire pressure. Underinflated tires increase rolling resistance, which leads to lower fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, which can be found on a sticker inside the driver’s side doorjamb. Tire pressure monitoring alerts are great but don’t substitute for checking your tires from time to time.

Reduce unnecessary weight. Carrying extra weight in the car places a greater load on the engine, which results in increased fuel consumption. Remove any unnecessary items from the trunk and passenger compartment. This is a small adjustment with almost negligible gains, but you will be removing parasitic weight.

Avoid excessive idling. Idling consumes fuel without covering any distance. If you’re stopped for more than a minute, turn off the engine. The 718 Boxster T does not have auto start/stop in all configurations, so it is more important to shut off the engine manually sometimes.

Consider using cruise control on the highway. Maintaining a constant speed on the highway can improve fuel economy. Cruise control helps to avoid the speed fluctuations that can waste fuel. Find all Porsche fuel economy data and you’ll notice vehicles reach their max potential MPG at consistent highway speeds.