An EPA rating of 100 MPGe (miles per gallon equivalent) for the 2015 Tesla Model S AWD, 85D isn’t about squeezing every last drop of gasoline; it’s about redefining performance and luxury in an all-electric, dual-motor package. This vehicle is purchased by those who value innovation, technology, and outright speed, all while making a statement about their commitment to sustainable transportation.

City and highway performance

The 85D’s official EPA ratings are 95 MPGe in the city and 106 MPGe on the highway. These figures reflect the efficiency achievable under standardized testing conditions. The slightly lower city rating stems from the energy required for initial acceleration from a standstill, while the higher highway rating shows the benefit of consistent speeds and regenerative braking when anticipating traffic. Remember these figures are a starting point; real-world conditions will inevitably influence your actual efficiency. Still, breaking 100 MPGe on long highway stretches is very achievable with some attention to driving style.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Tesla Model S AWD, 85D to be $750. This figure is calculated based on 15,000 miles of driving per year, with a mix of city and highway conditions, using the national average electricity price at the time of calculation. The important factor, of course, is that “fuel” is electricity, not gasoline. Actual costs will vary depending on your local electricity rates, driving habits, and how frequently you use public charging stations versus charging at home, which is typically considerably cheaper.

Real-world expectations

While the EPA ratings provide a useful benchmark, several factors impact the real-world range and efficiency of the 85D. Aggressive acceleration, frequent use of “Ludicrous Mode,” and high speeds will all decrease range and efficiency. A smooth driving style with a focus on regenerative braking can significantly extend your range. Weather conditions also play a role; cold temperatures reduce battery performance and increase energy consumption for heating the cabin. Understanding these influences is important to maximizing the 85D’s efficiency and range in your daily driving.

How it compares

The 2015 Tesla Model S AWD, 85D stood apart from its gasoline-powered competitors, as it still does today. Consider the BMW 740i xDrive from the same year, which achieves roughly 22 MPG combined. Even a hybrid like the 2015 Lexus LS 600h managed only around 20 MPG combined. The crucial difference is that the Model S buyer isn’t cross-shopping these vehicles solely on fuel economy. While the substantially lower running costs are a welcome benefit, the decision to buy a Tesla is often driven by a desire for cutting-edge technology, performance, and a commitment to reducing their environmental footprint. Explore all Tesla fuel economy data for a broader perspective. You can review MODEL MPG across all years.

Tips to maximize efficiency

Regenerative braking is your best friend in the 85D. Anticipate traffic flow and lift off the accelerator early to allow the car to decelerate using the motor as a generator, recapturing energy and extending your range. Get comfortable with one-pedal driving; it quickly becomes second nature and makes a significant difference.

Precondition the cabin while the car is plugged in, especially during cold weather. This warms or cools the interior using grid power, saving battery energy and maximizing range on your journey. Also, take advantage of seat heaters, which can provide targeted warmth without draining the main cabin heating system as much.

Pay attention to tire pressure. Properly inflated tires reduce rolling resistance, which improves efficiency and range. Check your tire pressure regularly, especially during temperature changes, and maintain the recommended pressure specified on the door jamb sticker.

Minimize aerodynamic drag by removing any unnecessary roof racks or carriers when not in use, as these can significantly impact range, particularly at highway speeds. Consider lowering the suspension (if equipped) to reduce drag further. For the best results, use the lowest setting on the highway and raise it up for navigating rougher terrain or bad weather.

Plan your charging stops carefully on long trips. Use the Tesla Supercharger network or other reliable charging networks, and try to charge to the minimum level needed to reach your destination, as charging slows down significantly as the battery approaches full capacity. Arriving at your destination with a low state of charge can also maximize regenerative braking capacity for the next leg of your journey.