20 MPG combined isn’t going to win the 2021 Porsche 718 Spyder any hypermiling contests, but that figure is almost irrelevant to the car’s core mission. This isn’t a daily commuter; it’s a scalpel designed for dissecting apexes and delivering an unfiltered driving experience. Fuel efficiency is less important than the visceral thrill of the naturally aspirated 4.0-liter flat-six screaming behind your head.

City and highway performance

The EPA estimates of 18 MPG in the city and 24 MPG on the highway show the Spyder’s dual personality. In urban settings, stop-and-go traffic will punish the fuel tank as the engine works harder and the automatic transmission cycles through gears. However, on the open road, where the Spyder can stretch its legs and maintain a consistent speed, the fuel economy becomes more reasonable. Those who frequently engage in spirited backroad drives will likely see a blend of city and highway figures, potentially even dipping below the combined 20 MPG rating.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Porsche 718 Spyder at $2,900. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, using the national average fuel price at the time of calculation. Keep in mind that premium fuel is required, and fluctuations in gasoline prices can significantly impact the actual amount spent at the pump. While some may balk at this cost, Spyder owners are likely less concerned with fuel bills and more focused on the cost of entry into the world of high-performance open-top motoring.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy will vary widely depending on driving style, road conditions, and maintenance. Aggressive acceleration, frequent gear changes, and prolonged idling will all contribute to lower MPG. Conversely, smooth driving and adherence to speed limits can help to achieve figures closer to the EPA estimates. The 718 Spyder encourages assertive driving, but even moderate restraint can yield surprisingly decent fuel consumption during longer cruises. See 718 MPG across all years to compare similar models.

How it compares

Competitors like the BMW Z4 M40i achieve a combined 25 MPG with its turbocharged inline-six, a significant advantage on paper. The base Chevrolet Corvette Stingray, despite packing a larger V8, manages a combined 19 MPG. However, these comparisons are somewhat superficial. The Spyder buyer isn’t cross-shopping data sheets; they’re drawn to the Porsche’s unique driving dynamics, mid-engine balance, and open-air experience, qualities that these competitors can’t fully replicate. Fuel economy is a compromise they’re willing to make for automotive purity. Consider all all Porsche fuel economy data.

Tips to maximize efficiency

Gentle acceleration is key to saving fuel, especially from a stop. Avoid sudden bursts of speed and try to maintain a consistent pace. The Spyder’s throttle is responsive, so a light foot can make a difference.

Use cruise control on the highway to maintain a steady speed and avoid unnecessary acceleration. This is particularly effective on long, flat stretches of road. While the Spyder begs to be driven hard, constant speed changes drain fuel unnecessarily.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance and reduce fuel economy. Check your tire pressure regularly, and inflate them to the recommended pressure listed on the door jamb sticker.

Minimize idling. If you’re stopped for more than a minute, turn off the engine. Idling consumes fuel without moving the car. This is especially important in urban environments.

Plan your routes to avoid stop-and-go traffic. Using navigation apps to identify congested areas can help you find alternate routes that allow for smoother driving and better fuel economy. Fewer stops equals improved fuel efficiency.