A low sulphur content may be good for the environment, but it is less than wonderful for the engine, since low sulphur diesel is lacking in lubrication for the top end of the engine, and can lead to problems with injectors and other expensive parts.
Some additives help improve the lubrication propeties of low sulphur diesel, but too few people are aware of the need to use them, which may result in premature wear to pumps and injectors.
Paul.