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Mumbai.New Delhi - The Centre has dismissed concerns that E20 petrol — fuel blended with 20% ethanol — damages vehicle engines, telling Parliament that there is no credible evidence linking the fuel to engine failure or sudden vehicle breakdowns. Responding to a written question in the Rajya Sabha on July 20, Minister of State for Petroleum and Natural Gas Suresh Gopi said the government's conclusion is backed by scientific studies and real-world operating data from more than 230 million vehicles across the country.
Nationwide Vehicle Data Supports Government Stand
The minister said over 200 million two-wheelers and more than 30 million petrol-powered cars are currently operating on ethanol-blended fuel, including a substantial number of vehicles manufactured before E20 certification norms were introduced. Even after analyzing extensive service records and operational data from these vehicles, the government has found no confirmed case where ethanol blending directly caused engine failure or any major mechanical breakdown.
The clarification comes amid growing public concerns over whether older vehicles can safely use E20 petrol as India accelerates its ethanol blending programme.
Scientific Rollout, Not a Sudden Policy Shift
The government stressed that India's transition to E20 has been gradual, evidence-based and carried out after extensive consultations with all stakeholders, including automobile manufacturers, fuel companies and technical experts.
Key milestones highlighted in Parliament include:
- Ethanol blending in petrol stood at just 1.53% in 2013-14.
- The blending level was progressively increased after scientific evaluation.
- India achieved the 20% ethanol blending target during 2025-26.
- Every stage of implementation involved technical assessment and industry consultation.
According to the ministry, the policy was never introduced abruptly but evolved over several years through a phased roadmap.
Automakers' Service Records Show No Damage
The government also relied on data shared by leading automobile manufacturers. A major passenger vehicle manufacturer serviced nearly 28.4 million vehicles during FY26, including around 15 million older vehicles that were not originally designed for E20 fuel.
Despite the large number of non-E20-certified vehicles in circulation, the company's service records reportedly did not register a single case of vehicle damage directly attributable to E20 petrol. Similar findings emerged from the service database of a leading two-wheeler manufacturer, where no unusual rise in engine-related complaints was observed after the transition from lower ethanol blends to E20 fuel.
Older Vehicles May See Minor Mileage Drop
On fuel efficiency, the government acknowledged that mileage depends on several variables such as driving conditions, maintenance standards and individual driving habits. However, it admitted that some older vehicles originally designed for E10 fuel may experience a modest 3-5% decline in fuel economy after switching to E20.
Officials, however, argued that the slight reduction is offset by several operational and environmental advantages:
- Higher octane rating improves engine performance.
- Better anti-knock properties help enhance engine durability.
- Cleaner combustion lowers harmful emissions.
- Smoother engine operation improves overall driving experience.
The government maintained that these benefits outweigh the limited impact on mileage in older vehicles.
No Immediate Plan Beyond E20 Blending
Replying to another query in the Rajya Sabha, Suresh Gopi clarified that the government has not taken any decision to increase ethanol blending beyond the present 20% level. Any future move, he said, will be based on detailed technical studies and consultations with automobile manufacturers, oil marketing companies and research institutions before a policy decision is considered.
The statement is expected to reassure millions of vehicle owners as India continues to pursue cleaner fuels, reduce dependence on imported crude oil and promote domestically produced ethanol without compromising vehicle safety or reliability.
