Sometimes the Good Guys - US - Win
Back in 1999 and 2000, the EPA issued the requirement that all US diesel fuel sulfur content be reduced 97 percent from 500 part per million (ppm) to only 15 ppm by 2007. The purpose was to a) reduce emissions in all existing diesels moderately with no harm to them and b) to allow the installation of NOx reducing components in 2007 that would otherwise be poisoned by the higher sulfur content. The petroleum refiners and the engine makers resisted strongly but the EPA held its ground and the r