> 70 MPG is an EV number. You'll never get a gas car that gets that mileage.

My old 320d did those on the motorwaym and more sometimes. It wasn't the average, but given almost all my driving was motorway, it wasn't far off.

Diesel fuel contains more energy per gallon/Liter so that’s not a useful comparison.

Also if "motorway" implies Britain, Imperial gallons are 20% larger than US gallons.

It does! But then also I don't know what a gallon of electricity is.