With 100 MPGe combined, the 2015 Tesla Model S 90D is unlike gasoline-powered luxury sedans. This isn’t about saving money on gas; it’s about a different driving experience while showing a commitment to sustainability. Buyers of the 90D aren’t cross-shopping with BMW 5 Series models; they’re stepping into a future where performance and lower fuel costs coexist.

City and highway performance

The EPA estimates of 95 MPGe in the city and 106 MPGe on the highway show that electric vehicles often perform better in stop-and-go conditions. Unlike gasoline engines, electric motors don’t waste energy idling. Regenerative braking, which recaptures kinetic energy during deceleration, is far more effective in city driving than on the open road, adding efficiency boosts when navigating urban traffic. The higher highway MPGe suggests that consistent speed is where the Model S 90D excels, gliding at 70-80 mph with less energy expenditure per mile than the constant acceleration and stops of urban environments. Consider checking MODEL MPG across all years.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2015 Tesla Model S 90D to be $750. This figure comes from driving 15,000 miles per year, using a national average electricity price. It’s a standardized way for consumers to compare the energy costs of different vehicles. While the electricity price varies based on location and charging habits, and can fluctuate with the national average, the $750 figure provides a consistent way to compare costs. For many owners who charge at home using off-peak rates, the actual cost can often be significantly lower. Review all Tesla fuel economy data at all Tesla fuel economy data.

Real-world expectations

While the EPA figures provide a good starting point, the actual MPGe you achieve in your 2015 Model S 90D will depend on several factors. Driving style plays an important role. Aggressive acceleration and high speeds drain the battery faster than smooth, moderate driving. Ambient temperature also matters; cold weather can reduce battery range, while warmer weather typically improves it. Using climate control systems demands power, especially heating, which can noticeably affect efficiency. Finally, remember that battery degradation occurs over time, gradually reducing its capacity and range.

How it compares

The Tesla Model S 90D is much more efficient than other luxury sedans of its time. The BMW 535i, for example, achieves around 24 MPG combined. A Mercedes-Benz E350 manages a similar 25 MPG. Even hybrid competitors of the era, like a Lexus ES 300h with around 40 MPG combined, are not as efficient as the Model S 90D’s 100 MPGe. Model S 90D buyers are often motivated by the cutting-edge technology, the quiet and smooth acceleration, and the desire to reduce their carbon footprint, factors for which they are willing to pay a premium.

Tips to maximize efficiency

Precondition the car before starting your trip. Heating or cooling the cabin while the car is still plugged in uses grid electricity instead of drawing power from the battery, preserving your range. Schedule your charging to take advantage of off-peak electricity rates, reducing your energy costs and easing the strain on the power grid during peak demand times.

Use regenerative braking wisely. Learn to anticipate stops and lift off the accelerator early to maximize the amount of energy recaptured during deceleration. This is more effective than hard braking.

Minimize energy-intensive features, especially in colder weather. Heated seats consume less energy than the cabin heater, so use them as your primary source of warmth. Lower speeds on the highway also dramatically reduce the air resistance that drains the battery.

Keep the tires properly inflated. Underinflated tires increase rolling resistance, which requires more energy to maintain speed. Check your tire pressure regularly and inflate them to the recommended level.

Reduce unnecessary weight in the car, especially in trunk areas. Every extra pound requires more energy to accelerate, so lighten the load wherever possible by removing unnecessary items.