E100 fuel gets govt nod, paving way for cars running on 100% ethanol

The government has amended the Central Motor Vehicles Rules to allow E100 fuel, paving the way for ethanol-powered cars without any petrol dependence.

In Short

• Government clears use of E100 fuel in flex-fuel vehicles
• Amendments to Central Motor Vehicles Rules include E100 and E85
• Move aims to cut oil import dependence and reduce emissions

The government has officially cleared the way for vehicles that can run on E100 fuel, which contains nearly 100 per cent ethanol, by notifying amendments to the Central Motor Vehicles Rules. The move is aimed at promoting flex-fuel vehicles, reducing dependence on imported crude oil and cutting emissions.

The Ministry of Road Transport and Highways (MoRTH) notified the amendments to the 1989 Rules on October 23, incorporating E100 alongside E85 in the rules governing vehicle emission standards, fuel specifications and testing procedures.

The revised rules will allow automobile manufacturers to develop and introduce vehicles designed to run on higher ethanol blends.

However, E85 and E100 fuels can be used only in vehicles specifically designed and certified for them. Conventional petrol cars, including those designed to run on E20 fuel, will not be allowed to use these higher ethanol blends.

The amendment expands the regulatory framework to accommodate vehicles capable of running on these higher ethanol blends. Such vehicles are known as flex-fuel vehicles because they are designed to operate on different proportions of ethanol and petrol.

The change is significant for automobile manufacturers preparing to introduce vehicles that can run on higher ethanol blends, as the government has now formally incorporated E100 into the relevant motor vehicle rules.

CAN EXISTING PETROL CARS RUN ON E100?

No. The revised rules do not allow existing petrol cars to use E85 or E100 unless they have been specifically designed and certified for these fuels.

A senior road transport ministry official said fuels containing more than 20 per cent ethanol and up to 100 per cent ethanol would be meant exclusively for vehicles designed and certified to use them.

The amendment, therefore, provides for the use of E100 in compatible vehicles rather than permitting its use across all petrol-powered cars.

WHAT CHANGES THE GOVERNMENT MADE?

The Ministry of Road Transport and Highways has amended several provisions of the Central Motor Vehicles Rules, 1989, to formally include E100 fuel in the existing regulatory framework. The changes cover fuel specifications, emission-related tables and vehicle testing requirements.

Under the amendments, references to E85 have been expanded to include E100 in multiple provisions. An explanatory note also clarifies that both fuels can be used only in flex-fuel vehicles specifically designed by original equipment manufacturers (OEMs) and certified for their use.

The amendments also raise the gross vehicle weight limit from 3,000 kg to 3,500 kg.

The changes follow a public consultation process, with the draft rules published in April for 30 days to invite objections and suggestions before the final notification.

HOW CARMAKERS PREPARING FOR E100

The notification provides a regulatory framework for automobile manufacturers developing vehicles capable of running on higher ethanol blends.

In June 2026, Maruti Suzuki India launched the Wagon R Flex Fuel, described in the supplied information as India's first flex-fuel passenger vehicle. The model can run on ethanol-petrol blends ranging from E20 to E100.

Toyota Motor Corporation, Tata Motors and Hyundai Motor Company are also developing flex-fuel vehicles for the Indian market as the government pushes for wider adoption of alternative fuels.

The latest amendment is an important step for manufacturers preparing to introduce such vehicles, as it incorporates E100 into the rules governing vehicle emissions, fuel specifications and testing.

Reducing India's dependence on imported crude oil is a key objective of the government's ethanol-blending programme. Imported crude oil is one of the major contributors to the country's current account deficit.

The government has already rolled out E20 petrol, containing 20 per cent ethanol and 80 per cent petrol and achieved its 20 per cent ethanol-blending target ahead of the original 2030 timeline, according to the information provided.

India's total ethanol production capacity stands at nearly 2,000 crore litres, while oil marketing companies have issued tenders exceeding 11 billion litres annually to meet the E20 blending requirement.

The expansion of the regulatory framework to include E100 is intended to support the use of higher ethanol blends and reduce reliance on imported fossil fuels. The policy is also aligned with efforts to lower emissions.

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