Question 1

Does Tesla's own range meter overestimate range?

Accepted Answer

The percentage-to-miles conversion shown on your Tesla's screen is based on a fixed, ideal Wh/mi figure for your model — it doesn't know about today's weather, your speed, or how you're driving, so it can only ever be a starting estimate. Our estimator applies real-world fleet efficiency data on top of that baseline, adjusted for your actual conditions, which is why it can read noticeably lower than the car's own dashboard number on a cold or motorway-heavy trip.

Question 2

Why is my summer range so much better than winter?

Accepted Answer

Two things stack up in winter: the battery itself is less efficient at low temperatures, and cabin heating draws a meaningful amount of extra energy on top of that. Together they can cut real-world range by a third or more on a genuinely cold day, which is entirely normal — it isn't a sign of degradation, and most of that gap disappears again once temperatures rise.

Question 3

Do bigger wheels reduce range?

Accepted Answer

Yes, a little. Larger and wider wheel/tyre combinations add rolling resistance and unsprung weight, which typically costs a Tesla a few percent of range compared with the smallest available wheel option on the same model — noticeable over a long trip, but rarely the deciding factor next to speed or temperature.

Question 4

Does Autopilot or FSD use extra energy?

Accepted Answer

The onboard computer that runs Autopilot and Full Self-Driving draws a small, roughly constant amount of power — a negligible fraction of what the drivetrain uses. If anything, the smoother, more consistent speed control it applies can very slightly improve efficiency compared with human stop-start driving; it isn't a meaningful drain on range either way.

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