Beginning Oct. 1, Avis and Budget will become the first major rental-car companies to ban smoking in their entire North American fleets and to impose a cleaning fee of up to $250 on customers who smoke in the cars.

"The No. 1 request we get is for a smoke-free car," says John Barrows, spokesman of the Avis Budget Group, the parent company. He says a common customer complaint is a car that smells of smoke, adding, "We're addressing both concerns."