> More important, the fuel economy of cars increased on average by about a third — or 6 miles a gallon — between 2004 and 2021, Cars or vehicles? In the US the

> More important, the fuel economy of cars increased on average by about a third — or 6 miles a gallon — between 2004 and 2021, Cars or vehicles? In the US the SUV is king and sidesteps fuel efficiency mandates. Cars and SUVs alike are getting better but SUVs will always guzzle, too much air friction etc.