That's OK. My 2019 Ridgeline gets 30 MPG highway, about 20 MPG city. That's an advantage of living in the US -- our gas mileage formula is more intuitive.
I don't see how you can claim that MPG is objectively "more intuitive" than L/100km....
edit: woops 12.7 l/100km is actually 18.5 mpg. All these years I thought 10l/100km was 30 mpg! must have done the conversion wrong once and been basing my whole life off it ever since. It's great to find out something you thought was true is not sometimes.