The 2015 Tesla Model S 70D gets 101 MPGe combined, so it is an efficient large, luxurious, all-wheel-drive car. This isn’t a hybrid or a compact commuter; it’s a Tesla, and a performance machine that uses electrons instead of gasoline. The 70D appealed to buyers who wanted cutting-edge technology, rapid acceleration, and a commitment to sustainable transportation, even with a higher initial purchase price.

City and highway performance

The EPA numbers for the 2015 Model S 70D are consistent across different driving scenarios. The city rating is 101 MPGe, almost identical to the highway rating of 102 MPGe. This near parity is a direct result of the electric powertrain’s characteristics. Electric motors offer near-instant torque across a wide speed range, eliminating the efficiency losses from frequent acceleration and deceleration in city traffic, unlike internal combustion engines. Regenerative braking recovers energy during deceleration, which enhances city driving efficiency. On the highway, the 70D maintains efficiency because the electric motor operates within its optimal range, minimizing energy consumption during cruising speeds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Tesla Model S 70D at $750. This is based on driving 15,000 miles per year using the national average electricity price at the time of the evaluation. This is a good figure, particularly for drivers used to filling up a large luxury sedan frequently. Electricity prices vary regionally, but the 70D can offer savings compared to gasoline-powered alternatives. Those who purchase electricity from renewable sources and/or charge at non-public locations can save even more.

Real-world expectations

The EPA provides a standardized benchmark, but real-world range and efficiency can vary depending on driving habits, weather, and terrain. Aggressive acceleration, high speeds, and frequent climate control use can impact the battery’s range. Extreme temperatures can also affect battery performance. However, even in less-than-ideal conditions, the 70D typically delivers a usable range that aligns closely with the EPA estimates. Owners say that careful driving and preconditioning the battery (warming or cooling it while plugged in) helps to maximize efficiency. Owners are incentivized to drive efficiently, and can monitor energy use in real time using the car’s dashboard display, unlike gasoline vehicles.

How it compares

The 2015 Tesla Model S 70D is unique in the luxury sedan segment. Its all-electric powertrain delivers better fuel economy than comparable gasoline-powered vehicles. For instance, the 2015 BMW 535i xDrive, a similar all-wheel-drive sedan, achieves only 25 MPG combined. The difference in annual fuel costs is significant. Even hybrid competitors like the 2015 Lexus GS 450h, with its 31 MPG combined, don’t compare to the 70D’s efficiency. Potential buyers may have considered hybrids, but the GS 450h lacked the interior space, cargo capacity, and overall appeal of the Model S. Performance characteristics also differ so significantly from gasoline-powered vehicles that the choice is clear for many buyers. The Model S offers low emissions and high performance, along with the safety and practicality one would expect from a luxury sedan.

Tips to maximize efficiency

One way to extend the 70D’s range is to drive gently. Smooth acceleration and anticipating traffic can reduce energy consumption. The electric motor’s instant torque can be tempting, but resisting aggressive acceleration offers the best results.

Using regenerative braking effectively is important. By lifting off the accelerator early and letting the car decelerate naturally, you can recapture energy and extend your range. Get to know the different regenerative braking settings in the Model S and choose the best setting for your driving style.

Preconditioning the battery while plugged in can also help. Warming the battery in cold weather or cooling it in hot weather can improve efficiency and range because the car doesn’t have to use energy on temperature regulation while driving. This is useful in extreme climates.

Tire inflation is important for electric vehicles. Check your tire pressure regularly and maintain the recommended inflation level to minimize rolling resistance and optimize efficiency. This can help you realize greater mileage and extend the life of your tires.

Finally, avoid unnecessary weight. Removing excess cargo reduces the energy to accelerate and maintain speed. The Model S can handle a reasonable load, but minimizing clutter can improve efficiency. You can also compare MODEL MPG across all years.
You can also view all Tesla fuel economy data.