TOKYO — In the age of electric vehicles, Toyota's critics have pulled no punches in calling the Japanese carmaker's tenacious commitment to internal combustion backward, even ecologically unsound. But ...

Before the turn of the millennium, you wouldn't find many people complaining about carbon deposits on engine valves. However, all of that changed as gasoline direct injection (GDi) went mainstream in ...

The introduction of new technology clean diesel truck engines and emissions control systems into Pennsylvania's trucking fleet over the last five years is now at a 35% level, yielding significant ...