| Reduction in Pollutant Emission in Vehicle due to Change in Fuel Quality (2000-2005) | |||
| Pollutants | Percantage Reduction in diesel vehicle emission | Percantage Reduction in gasoline vehicle emission | |
| Light duty vehicles | Heavy duty vehicles | ||
| CO | -12.5 | -0.5 | 31.5 |
| HC | 0.13 | *4.5 | 22 |
| NOX | -6.5 | -7 | 18.5 |
| PM | -29.5 | -19.5 | - |