I refuse to believe this is a serious article and that a functioning adult has jumped into a small Nissan leaf to push it to its limit without doing any research before hand. 70 mph has never been the most efficient cruising speed for a vehicle whether its petrol, diesel or electric because of physics. You'll never get close to a normal mpg of a petrol/diesel at 70 mph. 60 maybe but most likely 50/55 depending on the gearing - electrics have the benefit of not suffering other losses at low speeds so they're super efficient at low speeds and stop start traffic etc. But none of this is new information and readily available to anyone reviewing, I'm sure you were already aware of the drawbacks and benefits of EVs and you're playing dumb for the clicks