@dakhlkt22 , there are few universal generalizations on this topic. For example, keeping the windows open and a/c off can save range for city driving / stop-and-go traffic on hot days. However, keeping the windows up is usually the better approach for maximizing range at cruising highway speeds.
@RedY23 , it is nearly impossible to comment on your experience without more information.
Winter: In cold climates you'll definitely approach 378 Wh/mile if making short trips everywhere (with a cold battery) requiring the vehicle to reheat the cabin. A long road trip would be less consumption.
Summer: You should easily be under ~ 300 Wh/mile unless you're flooring it from every stop light, using the mechanical brakes a lot, and driving 70mph+ on the highway.
There are a lot of posts on this forum about maximizing range. In my experience, everyone focusses on the insignificant. If you want maximum range / efficiency, then it's all about speed. The MYP is insanely quick. You get used to it, but if you are not accelerating extremely slow like a gas car then you're consuming way more than EPA rating. On the highway, the wind resistance (energy consumption) increases near exponentially (not linearly). You'll consume massively more energy at 75mph than at 60 mph. The EPA's range numbers come from driving like the slowest of grandmas. It is very difficult to drive like a grandma in a Performance model Tesla.
