New Delhi: Amid concerns over vehicle performance, the Centre on Thursday ruled out any decision to increase ethanol blending beyond 20%.
It said any future move towards higher ethanol blends would be considered only after detailed scientific and technical studies and consultations with all stakeholders.
In a written reply in the Lok Sabha, Minister of State for Petroleum and Natural Gas Suresh Gopi said E85 fuel, which contains 85% ethanol and 15% petrol, has been introduced only for Flex Fuel Vehicles designed and certified for its use. He said this does not amount to an increase in the nationwide ethanol blending level.
The government said India achieved 20% ethanol blending five years ahead of its original target after more than two decades of phased policy implementation, scientific evaluation and stakeholder consultations.
The average ethanol blending increased from around 12% in 2022-23 to 14.6% in 2023-24 and 19.2% in 2024-25. It reached 20% during the 2025-26 ethanol supply year between November and June, according to an official statement.
According to the government, ethanol has been used globally for more than a century. It said countries such as Brazil have successfully operated higher ethanol blends for decades.
In India, the Ethanol Blended Petrol Programme has been implemented in consultation with NITI Aayog, automobile manufacturers, Oil Marketing Companies, the Automotive Research Association of India, the Society of Indian Automobile Manufacturers, the Indian Institute of Petroleum, and other technical institutions.
The government said scientific studies and field validation have established that E20 is a safe and cleaner fuel when used according to prescribed specifications and manufacturer recommendations. It added that the assessment is based on laboratory research and nationwide operational experience.
The ministry said E15+ fuel has been in widespread use for more than three-and-a-half years, while E19-E20 fuel has been used for over two-and-a-half years. It said more than 20 crore two-wheelers and over 3 crore petrol cars have operated on these blends without verified evidence of widespread engine failure or vehicle breakdown linked to ethanol blending.
According to the government, vehicle manufacturers have not reported abnormal corrosion, excessive wear or reduced vehicle life due to E20 fuel. It said manufacturers continue to honour warranty obligations for vehicles using E20.
The ministry said one of the country’s largest passenger vehicle manufacturers serviced 2.84 crore vehicles during FY 2025-26, including around 1.5 crore older vehicles not certified for E20, without reporting E20-related engine damage or abnormal component wear. It added that a leading two-wheeler manufacturer also reported no higher incidence of damage in vehicles running on E20 compared with earlier fuel blends.
The government said it has not received any widespread or substantiated complaints from vehicle manufacturers, automobile associations or consumer organisations about reduced mileage, poor acceleration or rusting of petrol tanks due to E20 fuel. It said concerns raised in media and social media had been scientifically examined.
It said studies conducted by the Inter-Ministerial Committee under NITI Aayog, IOCL, ARAI, IIP and SIAM confirmed that E20 does not cause abnormal wear, compatibility issues or adverse effects on vehicle performance.
The government added that any reduction in fuel economy in some E10-designed vehicles is generally limited to 3-5%, while E20 offers better octane rating, improved combustion and smoother engine performance.
The ministry said E20 was introduced only after validation of fuel systems, engine durability, drivability, material compatibility and emissions performance. It added that studies found no significant variation in performance or abnormal wear in older vehicles using E20.