New Delhi : The Centre is evaluating a phased transition to higher ethanol-blended petrol, with E21 likely to be introduced in 2027 and E25 potentially following by 2029, according to government sources. However, officials stressed that any move to E25 will be contingent on comprehensive scientific and technical validation before implementation.The proposed map builds on India’s successful rollout of E20 petrol, which underwent extensive scientific assessment before being introduced
