Euro 4 is a globally accepted European emission standards for vehicles that require the use of fuel with significantly low sulfur (0.005 percent, or 50 ppm) and benzene (maximum of 1 percent by volume) contents. Cleaner fuel means cleaner emissions and less pollution in the environment.

The upgrade from Euro 2 to Euro 4 reduces the toxic sulfur that comes out of the combustion engine by 450 parts per million (ppm), both on diesel and gasoline. Benzene, which is also considered harmful to humans, was also cut off by 4%. Standard CO emission permitted by Euro 4 on gasoline is 1.0g/km, while it’s 0.5g/km for the diesel.