I don't care that it's more common the other way, it doesn't make any sense in a sentence. When we talk about efficiency verbally, we say that higher or more ef

I don't care that it's more common the other way, it doesn't make any sense in a sentence. When we talk about efficiency verbally, we say that higher or more efficiency is better: but the numerical value is better if it is lower. Miles per kWh seems like the appropriate unit to me.