87 MPG combined is a stunning figure for the 2017 Tesla Model X AWD – 100D, and somewhat misleading if you’re accustomed to MPG figures representing gasoline consumption. That number actually represents MPGe – Miles Per Gallon equivalent – a metric the EPA uses to estimate the efficiency of electric vehicles. This all-electric falcon-winged SUV appeals to a specific buyer: one who prioritizes cutting-edge technology, spaciousness, and, of course, extremely low running costs over traditional luxury or performance driving dynamics. The Model X 100D buyer typically has access to home charging, sees the purchase as an investment, and actively seeks to minimize their carbon footprint.

City and highway performance

The EPA rates the 2017 Tesla Model X 100D at 86 MPGe in the city and 89 MPGe on the highway. This slight edge on the highway is important because electric vehicles typically perform better in city driving, thanks to regenerative braking. The Model X 100D’s impressive highway efficiency illustrates Tesla’s aerodynamic optimization and the refinement of their powertrain. Those who use the off-ramp often in their Model X will appreciate the regen braking feature and the mileage it saves.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2017 Tesla Model X 100D is only $850. This figure is based on driving 15,000 miles per year and using the national average electricity price. Keep in mind that your actual electricity cost will vary depending on your location and charging habits. Those with dedicated charging at home overnight will save money. If you do a lot of supercharging, you may see that $850 number rise a bit.

Real-world expectations

While the EPA estimates are a good starting point, real-world MPGe can vary depending on several factors. Driving style has a significant impact, with aggressive acceleration and high speeds draining the battery faster. Hauling cargo or passengers will also reduce efficiency. Weather and temperature play a role as well; cold weather can reduce battery performance, affecting range and MPGe.

How it compares

Comparing the Model X 100D to other SUVs is tricky, as there are few direct all-electric competitors from 2017. However, consider a hybrid SUV like the 2017 Lexus RX 450h AWD, which achieves 30 MPG combined. While more efficient than a non-hybrid, it is nowhere near the Model X 100D’s ratings. Even now, traditional gasoline-powered SUVs struggle to challenge the Model X 100D’s cost to drive. Check out all Tesla fuel economy data, and you’ll see their reputation for efficiency is well earned. This comparison is significant for buyers looking at three-row SUVs as families are a large segment of the buying pool. If cutting operating costs is a high priority, the Model X remains a strong choice because of its efficiency.

Compare this to MODEL MPG across all years to see trends across the Tesla fleet.

Tips to maximize efficiency

Take advantage of regenerative braking. Tesla’s regenerative braking system is highly effective at capturing energy during deceleration and returning it to the battery. Practice driving with a light foot and anticipate traffic to maximize the use of regenerative braking, reducing your reliance on the physical brakes.

Precondition the battery before driving. Using the Tesla app, you can preheat or precool the cabin and battery while the vehicle is plugged in. This minimizes the energy needed to reach your desired temperature once you start driving, preserving valuable range, especially in extreme weather conditions.

Monitor your tire pressure regularly. Properly inflated tires reduce rolling resistance, improving efficiency. Check your tire pressure at least monthly and adjust as needed to the recommended settings. A tire pressure monitoring system (TPMS) helps to remind you of the need for this maintenance.

Minimize weight and drag. Remove any unnecessary items from your vehicle to reduce weight. Also, consider removing roof racks or cargo carriers when not in use, as they can significantly increase aerodynamic drag, especially at higher speeds.