India Revises Vehicle Rules to Enable E85 and E100 Flex-Fuel Vehicles

Under the revised regulations, emission standards and certification requirements have been updated to explicitly include E100 fuel in addition to E85.

Vehicles manufactured for these fuels will need to comply with the prescribed safety and emission norms before being approved for use.

Flex-fuel vehicles are designed to operate on varying blends of petrol and ethanol through a single fuel system.

E85 contains up to 85 per cent ethanol blended with petrol, while E100 consists primarily of pure ethanol.

Advanced engine management systems in these vehicles automatically adjust fuel delivery and combustion parameters according to the ethanol content.

The government expects the policy change to encourage the use of domestically produced ethanol, benefiting the agricultural sector while enhancing India’s energy security.

Increased ethanol adoption is also expected to contribute to lower dependence on fossil fuels and support the country’s environmental sustainability goals.

MoRTH has clarified that E85 and E100 fuels should only be used in vehicles specifically designed and certified for such fuel blends.

The ministry cautioned that vehicles compatible with E10 or E20 fuels are not automatically suitable for E85 usage.

Existing vehicle owners are also not required to retrofit their vehicles under the amended rules.

The notification, which also includes updates related to biodiesel provisions and technical amendments, has come into effect upon its publication in the Official Gazette.

The latest step reinforces India’s broader strategy to expand ethanol utilisation and strengthen alternative fuel ecosystems in the transport sector.