Will 50 ppm sulfur diesel affect engine performance?
No, we do not expect any adverse impact at all except possibly older vehicles manufactured before 1995. How does 50 ppm sulfur diesel affect emission? The introduction of 50 ppm sulfur diesel enables sulfur sensitive exhaust after-treatment (i.e. particulate traps) to be used which reduces particulates emission from vehicles. The reduced sulfur also improves the odour of diesel exhaust gas. To what extent will 50 ppm sulfur diesel help to improve air quality? As the Ministry of the Environment and Water Resources has clearly stated, 50 ppm sulfur diesel plays a key role in reducing the level of particulates, which is a key pollutant here in Singapore. But 50 ppm sulfur diesel alone is not adequate.
