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  • Category: Opinion About

    What is the difference between BS-IV and BS-VI?

    Confused about the difference between BS-IV and BS-VI fuel? Wondering why only Delhi has made this switch and not other States in India? Dispel your confusion though the answers provided below.

    I'm talking about Bharat Stage fuel of petrol and diesel. What are the benefits of BS-VI as compared to BS-IV?

    I just got a question in the exams and the question is: In which state BS-IV switched to BS-VI? The answer is New Delhi. However, I don't understand the explanation. If there are benefits of supplying BS-VI in petrol pumps, then should it not be supplied to other states as well?
  • Answers

    3 Answers found.
  • BS IV and BS VI are the standards prescribed for emissions from vehicles. Presently all over India BS IV standards are in force. So the fuel we use and the vehicles we use will be made to adhere to the specifications prescribed in this BS IV standards. Now BS VI is an improved version of these standards which our country wants to implement. The BS VI standards more strict and give decreased maximum values for hazardous materials released from the vehicles. It may cost more for vehicles and fuel also. But in the changing scenario of the country, these are more a necessity. Now, these standards are in implementation in some parts of the country including New Delhi. The government is planning to implement these standards all over the country within next 2 or 3 years.

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  • What are the benefits of BS-VI as compared to BS-IV?

    In India, the Government has set emission standards that regulate the air pollutant directly related to the engine combustion. Since the year 2000, the Bharat stage (BS) values apply for vehicles on Indian roads and the values are set by the Central pollution control board based on European standards.

    Currently, we have the BS-IV grade fuel in most states. It is important to note that, by 2020 India is directly moving from BS IV to BS VI (SKIPPING BS-V STANDARD), this has to be borne in mind to avoid confusion.

    In simple terms, BS VI fuel is better and pollutants (CO-Carbon monoxide, HC-hydrocarbons, Nox- nitrogen oxides0 from diesel BS VI grade is much more environmentally friendly. Hence the Ministry of surface transport has decided on BS VI. Currently, Euro 6 norms are the best of European standards, BS VI is much closer to these Euro 6 than BS IV.

    If there are benefits of supplying BS-VI in petrol pumps, then should it not be supplied to other states as well?

    It would be done by 2020, it would be a gradual shift given the millions of vehicles in India.

    There are major logistical issues with the change from BS IV to BS VI, the fuel injectors, upgrading the refineries (needs around 50,000 crores), increase in the cost of fuel and vehicles etc. These logistical difficulties and the pressure from SC to implement the change earlier and Delhi being the worst polluted metro would be the likely reasons

  • BS-IV standards are in force in India now since 1 April 2017 to reduce vehicular pollution.Delhi has more population and population density.There are more than 50 lakh private vehicles in Delhi and more than 20 lakh vehicles passes from other states daily that is why there is more pollution in Delhi.So planning direct BS_VI standards 2020 onward. BS-VI standards are more stringent. It requires BS-VI fuel to implement these standards. BS-VI fuel production requires the modification in oil refinaries and huge investments.

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