The Nissan X-Trail '20GT',  which goes on sale September 18 at Nissan dealers nationwide in Japan, employs a clean running diesel that has met Japan's stringent 'Post New Long-term Regulations' - the first diesel in the world on sale in Japan to do so according to Nissan.

The car increases fuel economy by 30 percent over a 2.5-litre gasoline engine and cuts carbon-dioxide emissions by 20 percent, Nissan said.

Nissan also says that the 2.0-litre M9R engine has the power equivalency of a 3.5-litre V6 gasoline engine.

Diesel share of the car market in Japan is under 10% where diesel engines have an image problem.

Nissan says that its clean diesel engine design 'emphasises smooth, quiet operation, eliminating unpleasant noise and vibration associated with current diesel powerplants'.

NB: In 'Post New Long-Term Regulation', regulation values of NOx is reduced by 47% and the values of PM (particulate matter) by 64% from those of "New long-term regulation" which has been in effect since 2005 (applicable to vehicles weighing more than 1,265kg). Post New Long-Term Regulation is effective for new model vehicles beginning Oct. 2009, and for existing models and imported vehicles, starting Sept. 2010.