Volkswagen emissions scandal dims outlook for diesel
* Scandal raises questions about future of diesel cars
* Global stocks of diesel high in economic slowdown
* Gasoline demand has risen in China
* Gasoline engines have evolved rapidly
By Libby George and Ron Bousso
LONDON, Sept 23 (Reuters) - The scandal over Volkswagen's falsification of car emissions in the United States further dims the outlook for what was once seen as the fuel of the future.
Unforeseen changes in fuel consumption in the world's fastest growing economies such as China, combined with a global economic slowdown and the rapid evolution of gasoline engines, have left the world with an excess of diesel just as huge state-of-the-art refineries switch on.
The crisis at VW has turned the spotlight on concerns that have gathered momentum in recent years -- particularly in Europe where diesel is the more common car fuel -- about air pollutants it produces and its credibility as a cleaner alternative to gasoline that cloud prospects for diesel carmakers.
"The focus was on low carbon emissions," said Chris Main, a commodities analyst with Citi in London. "One thing that wasn't seen was that you'd get other pollutants - such as nitrogen. People are starting to become more wary of diesel." Continuación...