102 MPG combined. That number defines the 2018 Tesla Model S 100D. People don’t typically buy a Tesla because they’re hyper-focused on squeezing every last mile from a kilowatt. Instead, they see that number as proof that they can have blistering performance, cutting-edge technology, and lower fuel costs, all in one sleek package. The 100D isn’t about scrimping and saving; it’s about having it all.

City and highway performance

The EPA’s city and highway ratings for the 2018 Model S 100D are nearly identical: 101 MPG in the city and 102 MPG on the highway. This shows the efficiency of electric powertrains, which are less affected by stop-and-go traffic than internal combustion engines. While gasoline cars often see a significant drop in fuel economy in urban environments, the 100D maintains almost the same level of “fuel efficiency” whether it’s cruising down the freeway or navigating city streets. This consistency is a major advantage for owners who split their time between different driving conditions.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Tesla Model S 100D at $750. This figure is based on driving 15,000 miles per year, with a percentage of those miles driven in city versus highway conditions. The calculation also uses the national average electricity price. Of course, your actual electricity cost will vary based on your location, time of day when you charge, and the electricity plan you have with your utility provider. But $750 provides a benchmark and clearly shows how inexpensive it can be to fuel a Model S 100D compared to an equivalent gasoline-powered luxury sedan.

Real-world expectations

While the EPA’s numbers offer a useful baseline, real-world range and efficiency can vary. Ambient temperature, driving style, and the use of features like air conditioning and heating can all impact the actual range you achieve. Aggressive acceleration, particularly, will draw more power from the battery, reducing overall efficiency. Conversely, consistent, moderate driving, and pre-conditioning the cabin while plugged in can help maximize range. Many owners report achieving close to the EPA-estimated range in everyday use, but it’s wise to consider potential variations based on your own driving habits and environment. Review all Tesla fuel economy data to get a better idea of various models and years.

How it compares

Compared to other high-performance luxury sedans, the Model S 100D has unique efficiency. Consider the BMW M5, which gets around 17 MPG combined, or the Mercedes-AMG E63 S, hovering around 19 MPG combined. Even hybrid versions of these cars can’t approach the Model S 100D’s efficiency. For instance, the BMW 530e plug-in hybrid achieves around 27 MPG combined when running on gasoline. The Tesla performs well and gives the target, its appeal is clear: it offers comparable performance and luxury without burning as much gas or needing frequent trips to the gas station. Compare MODEL MPG across all years of production.

Tips to maximize efficiency

Take advantage of regenerative braking. The Model S 100D allows for regenerative braking, which captures energy during deceleration and sends it back to the battery. Learn to anticipate traffic and ease off the accelerator early to maximize this effect, effectively turning your motor into a generator.

Pre-condition the cabin while plugged in. Heating or cooling the car’s interior while it’s plugged into the charger draws power from the grid, not the battery, which can reduce energy consumption, especially in extreme temperatures, allowing you to start your drive with a fully charged and pre-conditioned battery.

Monitor your tire pressure regularly. Underinflated tires increase rolling resistance and reduce efficiency. Keeping your tires at the recommended pressure ensures optimal performance and range. Tesla displays tire pressure on the touchscreen; pay attention to the readings.

Minimize aerodynamic drag. While the Model S is already aerodynamically efficient, carrying cargo on the roof or using aftermarket accessories that disrupt airflow can negatively impact range, especially at higher speeds. When possible, transport items inside the vehicle.