ULSD has only 0.005% sulphur content, one-tenth that of Singapore’s current diesel fuel, and its introduction was aimed at countering the growing level of PM2.5s (particulate matter smaller than two microns) in Singapore’s atmosphere. In 2004 PM2.5s reached 21 micrograms per cubic metre, 8 micrograms higher than the international standard.

“It has been estimated that PM2.5 emissions from Euro IV diesel vehicles are 70% lower than those from existing Euro II vehicles,” said NEA director general Loh Ah Tuan.

“With the number of vehicles on the road rising, there is a need for more stringent emissions standards so that Singapore’s ambient air quality can be maintained.”

The Government is offering an incentive package for the switch to Euro II-compliant fuels and is working with industry bodies and motor associations to ensure a smooth transition.

“We will continue with these dialogues and work closely with the relevant parties to monitor the progress of this change,” said Loh.

“Today’s announcement will give everyone affected ample time to adapt, in particular oil companies who will have to replace Euro II diesel with ULSD at all service stations.”