Really the car the consumer got was better (to them) than the product ordered. It had better gas mileage, and better performance than it should have had.
The net loser in the trick was the environment (/ the world). If a company does a trick to make money and hurt the environment, the government should step in and make them pay, right? Like if I run a tire shop and secretly burn all my old tires in the back yard.. my customers weren't hurt (directly), but the entire environment was.