Overdrive magazine has been serving the needs of my inner car-buff, replacing Car and Driver from earlier days. Recently they have been publishing some good primers on automobile technology including one on electric cars. In the latest issue they have a good in-depth article on the new BSVI (BS-6) emission standards (http://overdrive.in/…/everything-you-need-to-know-about-bs…/) that is going to come into effect from April 1, 2020. What this means is that all new vehicles (big and small, 2-3-4 wheelers) sold after this date have to comply with BSVI emission requirements which are much more stringent than BSIV (BS-4) which was adopted in 2017. BSVI is based on the European standard Euro 6.
BSVI impacts diesel cars more because diesel engines pollute more and car-makers will have to equip diesel cars with cleaner running engines and more importantly install post-emission devices like DPF (diesel particulate filters) to meet the standards. This means that diesel cars will get more expensive. Also, in order to meet BSVI, diesel cars also need to use BSVI diesel. Indian gas refineries have been working on producing the cleaner burning diesel which should become available throughout the country by April 1st. Cars sold before the date of course can continue to run and they can use the BSVI diesel and will emit a bit less. BSVI implies significant reduction in nitrous oxides, sulphur content and particulate matter (80-90% reduction) all of which have been linked with respiratory and other illnesses. It will perhaps take years to see any noticeable improvement in air quality as more BSVI vehicles replace older cars. But it looks like a good thing.
In a nutshell, cleaner diesel, less emissions from new diesel vehicles, more expensive diesel cars.
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