Most diggers and construction machines discharge unfiltered exhaust fumes into the air. This is because special vehicles are made in small batches, and each requires a different filter geometry. Diesel soot filters of varying shapes can now be produced at competitive prices.

News from Detroit Auto Show 2008 spot, CEO of Honda Motor Co. said that their yet-to-be released clean diesel vehicles will be profitable immediately, unlike expensive gasoline-electric hybrid cars that still yield little or no profit after a decade on the market.

Measuring soot formation in a diesel engine is far from easy. Due to the turbulent environment in the combustion cylinder, no two combustion cycles are the same. Furthermore, the measurements are difficult to reproduce as the pressure at which fuel is injected into the cylinder causes an extra source of turbulence.

Cars and light trucks powered by advanced diesel technology or hybrid technology can provide larger societal benefits than traditional gasoline-powered automobiles, according to a RAND Corporation working paper presented.

Nissan Motor Co., Ltd. today announced that a new clean diesel technology using high-performance catalysts shows great promise and may be able to meet the State of California's standard for super-ultra-low emission vehicles (SULEVs), equivalent to the Tier2Bin2 emissions requirements.

Volkswagen of America, Inc. announced in late February that applications are now being accepted at www.vw.com for the oldest and highest mileage diesel-powered Volkswagens. Interested owners have until May 31 to get their application turned in; entering "Diesel Search" in the search box on the home page will take applicants to the application form.