New Delhi, May 29 -- India may soon mandate blending isobutanol with diesel and issue new rules for truck-trailers to boost energy security and cut carbon emissions. Speaking at a CII summit on Friday, V. Umashankar, secretary at the ministry of road transport and highways, said the blending mandate is being taken very seriously and is expected to roll out later this year.

"Bharat Petroleum is already undertaking strategic research for isobutanol blending with diesel. And the results are very encouraging. It is quite likely that the blending mandate will start coming in somewhere later this year. And diesel consumption is almost two times that of petrol consumption. So, blending diesel will have a far greater impact on our energy securit...