Went to the mahindra dealership from where i purchased scorpio, asked about bs4 diesel availability and the effects of bs3 diesel in bs4 vehicle, surprisingly they know nothing, even the difference between bs3 and bs4 vehicle. I was having more knowledge than them, thanks to the Tai-gers. Their answer " We sell only BS4 vehicles and their is no effect of either diesels in the vehicle. But they told me the place where their BOSS used to fill up and all their vehicles, will check that pump tommorow."