India approves E100 vehicles for certified flex-fuel models
The rule opens limited ethanol-fuel choices beyond mainstream E20 petrol.
Overview
India has cleared the regulatory path for cars that can run on fuel containing up to 100% ethanol, but the rule does not turn ordinary petrol cars into vehicles. Only purpose-built, certified can use or . The change builds on India’s drive from petrol blended with 10% ethanol toward mainstream fuel, available since April 2023. Maruti Suzuki launched the -to- in June 2026, while Toyota, Tata Motors and Hyundai have explored similar technology.
’s success now depends on more than government approval. Oil companies and retailers must build a network that could grow from 150 stations to 500 and eventually 5,000, while ethanol producers secure reliable supplies. Ethanol could reduce oil imports and create demand for farm-based industries, but it carries trade-offs: lower mileage, potentially higher vehicle costs, uncertain prices and uneven availability. Greater production could also intensify pressure on food supplies, water and regional resources. may become a useful choice alongside , but it is not yet a nationwide replacement for petrol.
Timeline
E100 adoption faced questions over cost, efficiency and supply
E100 adoption faced unresolved questions about , vehicle and fuel costs, infrastructure, regional availability and the of expanding ethanol production.
Officials clarified that E85 and E100 are restricted to purpose-built flex-fuel vehicles
The road transport ministry clarified that and E100 may be used only in vehicles specifically designed and certified for those fuels. Ordinary E20 or conventional petrol vehicles cannot use or E100, and existing E20 vehicles do not need to be modified because of the rule change.
India amended the Central Motor Vehicles Rules to recognise E100 flex-fuel vehicles
The Ministry of Road Transport and Highways amended the , replacing specified E85 references with E85 or in fuel, emissions and testing provisions. The change created a formal certification pathway for vehicles designed by to run on up to 100% ethanol. The notification also updated E10 and references and related technical classifications.
India planned an E100 dispensing network that could expand from 150 to 5,000 stations
Government and oil-sector plans proposed an initial E100 network of about 150 outlets, with expansion toward 500 stations and eventually 5,000. Oil marketing companies and fuel retailers would have to add storage, dispensing and supply capacity, while ethanol producers would need dependable feedstock and transport links. Without regional availability and competitive pricing, flex-fuel vehicles would remain difficult to use beyond pilot markets.
Maruti Suzuki launched the WagonR Flex Fuel for operation from E20 to E100
Maruti Suzuki introduced the as a passenger vehicle designed to use ethanol blends ranging from E20 through . The launch showed that automakers could prepare certified technology for near-pure ethanol, but commercial use still depended on fuel-station access, regional supply and consumer economics.
Toyota demonstrated a flex-fuel vehicle in India
Toyota demonstrated in India in 2023 as the country pursued E20 compatibility and higher ethanol blends. Evidence does not establish equivalent 2023 development by Tata Motors, Hyundai and Maruti Suzuki.
India began making E20 petrol available as the mainstream transition accelerated
The government announced that E20 fuel would become available from April 2023, starting the staged shift toward petrol containing up to 20% ethanol. E20-compatible vehicles were introduced as the nationwide pathway, while higher blends remained dependent on specially designed vehicles and separate fuel availability.
India adopted a roadmap to move from E10 toward E20 petrol
The government released its , targeting 20% ethanol blending and bringing forward the availability goal. The plan gave automakers advance notice to develop -compatible vehicles and required coordinated growth in ethanol production, procurement and fuel distribution.
India launched a pilot ethanol-blending programme
India began pilot in petrol in 2001. The programme was formally announced in 2004, with 5% blending expanded across several states by 2006.