Bharat Stage VI norms are the latest emission standard for automobiles and is equivalent to Euro-VI norms
which are currently standard in Europe. Bharat Stage VI norms will be rolled out in India on 1 April, 2020.
With ever rising air pollution levels in India, the Union government had in 2017 decided to move directly from
BS-IV norms for petrol and diesel vehicles to BS-VI emission standards to reduce vehicular pollution.
According to the Supreme Court no BS IV vehicles would be registered post 31 st March 2020. Accordingly, the
automobile industry is asked to comply with the directive before the deadline. Most of the manufactures
have already started launching updated new BS VI or BS VI complaint engines in the market. Some of the
major manufactures are shying away from the diesel generation for cleaner and greener fuel options and also
high investment cost of R&D is one of the major reasons for the same.
So what the Norms are?
The main norms to be followed by the manufacturers are the stringent sulphur emissions. The BS VI
complaint engines will release only 10 ppm (parts per million) as opposed to the BSIV engines which was
allowed at 50 ppm. For the light duty diesel engines, the BS VI engines need to cut on the Nitrogen oxide and
in case of light duty petrol engines it’s a cut of 25% in nitrogen oxide.
It would be mandatory to use portable emission measurement systems to be used for the purpose of in –
service commission testing. The emission can be checked using an OBD connection digitally and accurately
because of this.
Can BS4 cars run on BS6 fuel and Vice Versa?
According to the manufacturers and experts operating BSIV vehicles on the cleaner BS VI fuel would not have any
serious challenges, as the only major difference between BS4 and BS6 grade fuels is the significant reduction in
According to manufactures who have already started selling BS VI complaint vehicles claim that they have done
testing of running the cars on current range of gasoline and the results are satisfying. The BS VI fuel will be
available readily available throughout the country from early next year while some part of capital city have started
with supply of the future fuel.
Cost Impact on vehicles?
Automobile experts revealed the vehicles would get costlier by approximately 20-35 K for petrol models depending
the cubic capacity and class, also 60-80k for diesel cars. The hike in the vehicles is due to the investment in
technology for the new engines.
The auto industry has done its bit to ensure readiness with the BS6 norms, the onus is now on the government to
fast-track the vehicle scrap policy, which will get vehicles that do not comply with current emission and safety
standards off the roads. This is the only way to ensure the gains from the latest emissions-norm compliant vehicles
aren’t neutralized by crude older vehicles.