Gas versus diesel is a debate over which billions have been spent to see which is better. Famously, Soviet tanks in World War II were powered by diesel, while the Germans used gas engines. Closer to ...

Way back in 1978, the Environmental Protection Agency (EPA) issued a waiver to the Clean Air Act, allowing gasoline that was made up of up to 10% ethanol, or E10, to be sold at the fuel pump. E10 is ...

Westport is debuting its high-pressure CNG fuel system with Cespira HPDI technology on a Volvo VNL 300 at ACT Expo. Another high-horsepower natural-gas engine system may soon be available from ...