An EPA-estimated 86 MPG combined makes the 2017 Tesla Model X P100D AWD a startlingly efficient performance SUV, achieved through its all-electric powertrain and advanced energy management. That figure almost seems improbable when considering what the Model X P100D is designed to do: carry up to seven passengers and their gear with blistering speed and head-turning style. This isn’t a vehicle bought by penny-pinching hypermilers; it’s a statement of lower fuel costs wrapped in luxury and performance, attracting affluent buyers who appreciate cutting-edge technology, a guilt-free conscience, and acceleration that rivals some supercars.

City and highway performance

The EPA breaks down the Model X P100D’s efficiency further, revealing 81 MPG in the city and a more impressive 92 MPG on the highway. This difference, where highway efficiency surpasses city driving, is characteristic of electric vehicles. In urban environments, regenerative braking captures energy during deceleration, boosting efficiency. On the highway, consistent speeds allow the powertrain to operate at its most efficient range, unburdened by frequent stops and starts. Drivers who primarily use their Model X for longer commutes or road trips will likely see efficiency closer to the 92 MPG highway figure.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Tesla Model X P100D AWD to be precisely $900. This calculation is based on driving 15,000 miles per year, with electricity rates mirroring national averages. Your actual electricity costs may vary depending on your location, the time of day when charging (some areas offer cheaper off-peak rates), and the type of charger you use (home charger vs. public charging stations). Still, $900 represents a significant potential savings compared to traditional gasoline-powered SUVs of similar size and performance.

Real-world expectations

While the EPA figures provide a valuable baseline, real-world energy consumption can vary. Aggressive driving habits, frequent use of “Ludicrous Mode” for maximum acceleration, and consistently transporting a full load of passengers will reduce efficiency. Conversely, prioritizing smooth acceleration, using the regenerative braking system effectively, and maintaining proper tire inflation can help you achieve or even exceed the EPA estimates. Weather conditions also play a role; colder temperatures can decrease battery performance and, consequently, range and efficiency.

How it compares

Compared to its gasoline-powered SUV counterparts, the Model X P100D stands alone in terms of efficiency. A comparably sized and equipped BMW X5 M, for example, manages only 16 MPG combined. Even hybrid SUVs like the Lexus RX 450h, while much improved at 31 MPG combined, pale in comparison. The original motivation for designing a vehicle like the Model X was to offer an alternative to traditional SUVs with a reduced carbon footprint and a more attractive energy bill. For those concerned about all Tesla fuel economy data, remember that efficiency is a primary motivation for owning ANY Tesla. For those wanting to compare specific Model X configurations, or MODEL MPG across all years, the information is a mouse click away.

Tips to maximize efficiency

Make the most of regenerative braking. The Model X efficiently recaptures energy during deceleration. Adjust the regenerative braking setting to your preference; a higher setting provides more aggressive deceleration and energy recovery, essentially turning the accelerator pedal into a one-pedal driving experience, maximizing energy regeneration.

Precondition the battery. In cold weather, preheating the battery while plugged in can significantly improve range and efficiency. The car uses grid power to warm the battery, rather than draining the battery’s own stored energy. This will also lead to more consistent performance.

Control your charging habits. Avoid habitually charging the battery to 100%, as this can degrade the battery over time. Tesla recommends charging to 80% or 90% for daily use, only charging to 100% when needing the full range for a longer trip. If you can easily access public charging, charging a smaller amount, more often, can help prolong battery life.

Monitor tire pressure. Regularly check and maintain the recommended tire pressure, which can be found on the driver’s side doorjamb. Underinflated tires create more rolling resistance, reducing efficiency. Proper tire inflation is a simple yet effective way to maximize range.

Limit aerodynamic drag. While the Model X’s design is already aerodynamically optimized, carrying cargo on the roof can significantly increase drag and reduce efficiency. If transporting items on the roof is necessary, consider using an aerodynamic cargo carrier and removing it when not in use.