BS-VI is the latest emission norm in India. AS per BS-VI, the sulphur content in fuel has been slashed down by a whopping five times to 10 PPM. It also restricts tailpipe discharge from cars running on petrol. For diesel models, the peak level of carbon monoxide should not exceed 0.50 g/kg. It also limits the Hydro Carbons+Nitrogen Oxide discharge to 0.15 g/km. As for petrol cars, the Respirable suspended particulate matter maximum discharge level is 0.05.