22 MPG combined is almost an irrelevant data point when discussing the 2015 Porsche 918 Spyder. This isn’t a car purchased for its frugality; it’s a technological tour de force, a rolling showcase of Porsche’s engineering skills, and a ticket to a very exclusive club. Buyers aren’t cross-shopping it against a Prius; they’re comparing lap times and discussing the merits of different track-day tires. Fuel economy simply doesn’t register as a primary concern for this vehicle’s intended owner.

City and highway performance

The EPA estimates the 918 Spyder achieves 20 MPG in the city and 24 MPG on the highway. These figures might raise eyebrows if you’re coming from the world of mundane transportation, but remember what’s under the skin. A naturally aspirated 4.6-liter V8, derived from Porsche’s racing program, works with two electric motors to deliver a combined system output of 887 horsepower. The complex hybrid system is designed for maximum performance, not maximum efficiency. The seven-speed PDK dual-clutch transmission, while highly efficient, prioritizes lightning-fast gear changes to unleash the combined power of the engine and electric motors. This isn’t about gently sipping fuel; it’s about controlled explosions and breathtaking acceleration, which naturally comes at a cost. For many, these are acceptable, perhaps even desirable, tradeoffs.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Porsche 918 Spyder to be $2,650. This figure is calculated based on driving 15,000 miles per year and using the EPA’s projected national average fuel prices. In reality, most 918 Spyders likely see far fewer than 15,000 miles per year, and those miles are often accumulated during spirited driving or track events, which will drastically reduce fuel economy. Consider this $2,650 a baseline, and expect to spend significantly more on fuel if you regularly exploit the car’s performance capabilities. But, for owners willing and able to spend over $845,000, this is likely a minor component of overall running costs.

Real-world expectations

Forget about replicating the EPA figures in the real world, especially if you intend to use the 918 Spyder as intended. The harder you push it, the thirstier it becomes. Frequent use of the electric boost and the V8’s upper rev range will see fuel consumption plummet. On the other hand, if you drive it primarily in electric mode around town for short distances there will be almost no fuel use. But this defeats the purpose of owning a 918 Spyder. Track days will see single-digit MPG numbers. The reality is that fuel economy is heavily dependent on driving style, and owners will experience a wide range of figures. However, they’re almost certainly more focused on apex speeds than MPG.

How it compares

Comparing the 918 Spyder to other vehicles based on fuel economy is almost comical, but for context, consider other high-performance machines. A contemporary Ferrari LaFerrari, while not officially rated by the EPA, is estimated to achieve around 14 MPG combined. The McLaren P1, another hybrid hypercar from the same era, manages a slightly better 17 MPG combined. Even a “pedestrian” high-performance SUV like the Porsche Cayenne Turbo S E-Hybrid manages only 19 MPG combined. The 918 Spyder’s 22 MPG, therefore, is relatively impressive within its very niche segment. If you want to see all Porsche fuel economy data, browse our detailed lists.

Tips to maximize efficiency

While fuel efficiency might not be a top priority for 918 Spyder drivers, there are ways to reduce fuel consumption. Get to know the car’s different driving modes. The “E-Drive” mode prioritizes electric-only operation, allowing for quiet and emissions-free driving at lower speeds for short distances. Use this mode in urban environments to conserve fuel and reduce your footprint.

Anticipate traffic flow and maintain a smooth driving style. Avoid unnecessary hard acceleration and braking, as these actions deplete the battery charge and force the V8 to engage more frequently. Coasting whenever possible allows the regenerative braking system to recuperate energy, extending the electric driving range.

Ensure the tires are properly inflated. Underinflated tires increase rolling resistance, which negatively impacts fuel economy. Consult the owner’s manual for the recommended tire pressure and check your tires regularly to keep them at optimal levels. This also extends the life of your expensive tires.

Keep the car well-maintained. Regular servicing, including oil changes and air filter replacements, ensures that the engine operates efficiently. A well-maintained engine consumes less fuel and produces fewer emissions. As always, these high-performance powertrains demand the highest quality fluids and filters.

Monitor your driving data. The 918 Spyder’s onboard computer provides information on fuel consumption, electric range, and energy recuperation. Pay attention to these metrics to understand how your driving habits affect fuel economy and identify opportunities for improvement. Also check our website for specific 918 MPG data across all years.