Environmental groups and energy companies spend a fortune to influence laws governing automobile performance and emissions. It's a "no win" for the consumer. Cars using gasoline got better mileage before the current emissions standard. I'm not an expert. Is it better to use less fuel? Or use more fuel with with less tailpipe pollution? And then there was the fuel additive which was supposed to burn cleaner, but actually became a pollutant. More oil is consumed and sold. Increased demand for fuel benefits oil companies. Politicians are wealthier. Is the environment better off?