The Ministry of Road Transport and Highways has issued a draft notification proposing amendments to the Central Motor Vehicles Rules to formally include higher ethanol-blended fuels, signalling a regulatory step beyond the current E20 petrol programme.

The government has proposed changes to introduce provisions for E85 and E100 fuels. E85 is a blend containing 85% ethanol with petrol while E100 is pure ethanol used for transport.

The proposals include updating petrol fuel standards from E10/E to E10/E20 to bring them in line with the nationwide rollout of 20% ethanol-blended petrol. The draft also brings E85 and E100 fuels within the regulatory framework, upgrades biodiesel references from B10 to B100, and standardises emission-testing parameters and technical terminology. 

The draft also proposes increasing the gross vehicle weight threshold from 3,000 kg to 3,500 kg in select vehicle categories. In addition, the draft notification revises the hydrogen fuel classification from “Hydrogen + CN” to “Hydrogen + CNG”.

India achieved its target of 20% ethanol blending in petrol in 2025 with supplies sourced largely from sugarcane-based feedstocks and grain. The ethanol programme has been a central part of the government’s efforts to reduce dependence on imported petroleum products and expand the range of transport fuel options.

Vehicle manufacturers have now introduced engines compatible with E20 fuel, while policymakers have been evaluating readiness for higher ethanol blends. The ministry has sought public feedback on the draft for a period of 30 days.