More people in the vehicle means less fuel use per person: Comparing SUVs and cars
Green Car Congress
APRIL 2, 2019
persons, and assuming the weight of 100 pounds for an average occupant (including men, women, and children), the calculations were rerun assuming a reduction of the average fuel economy of SUVs by 0.29% (from 23.3 by Michael Sivak. Compared with cars, SUVs consume more energy per vehicle mile.