So, they are more efficient with 10 passengers[1]. [1]https://www.energy.gov/eere/vehicles/articles/fotw-1040-july-30-2018-average-vehicle-occupancy-remains-un

So, they are more efficient with 10 passengers[1]. [1]https://www.energy.gov/eere/vehicles/articles/fotw-1040-july-30-2018-average-vehicle-occupancy-remains-unchanged-2009-2017 https://www.energy.gov/eere/vehicles/articles/fotw-1040-july...