For decades, Volkswagen and Audi have held the only options for North American shoppers wanting a highly efficient model with a four-cylinder turbo-diesel—their 2.0-liter TDI engine. Now, with Mazda, ...

Powering trains with diesel is so has-been. How about pouring in some recycled plant oils from soybeans or corn? Throw in some fish oil too, for good measure. These are some of the renewable fuels ...

Diesel fuel still has a large role to play in achieving greater emissions reductions in heavy-duty trucks, experts said during a recent conference in San Francisco. Separately, they urged more in-use ...

The diesel engine has undergone a significant evolution over the past two decades. Most of these changes were designed to reduce emissions and air pollution, but once early generation emission goals ...

Volkswagen promises significantly cleaner diesel engines by using regenerative diesel fuels. The CO2 emissions can be reduced by a whopping 95%. No word on the NOx emissions, though. The company ...

This article was produced by Qatar Foundation for Scientific American Custom Media, a division separate from the magazine's board of editors. LNG carriers like this one cost at least $400 million.

For decades, Volkswagen and Audi have held the only options for North American shoppers wanting a highly efficient model with a four-cylinder turbo-diesel—their 2.0-liter TDI engine. Now, with Mazda, ...