IIT Kanpur Study Finds E20 Petrol Does Not Damage Engines

Researchers at the Indian Institute of Technology Kanpur found that E20 petrol does not significantly reduce vehicle mileage or cause engine damage.

This finding arrives as India expands its ethanol-blended fuel program. The results aim to address widespread consumer concerns regarding fuel efficiency and the long-term health of internal combustion engines as the government pushes for higher ethanol blends.

Testing took place at the IIT Kanpur automobile research laboratory. The study focused on how E20 petrol, a blend containing 20% ethanol, affects vehicle performance compared to standard fuels. The researchers monitored engine health and fuel consumption under normal operating conditions to determine if the blend caused premature wear or significant inefficiency.

According to the study, the drop in mileage associated with the use of E20 petrol is less than five percent ^[1]. The data suggests that the fuel does not markedly hurt engine performance, contradicting common claims that higher ethanol blends lead to severe engine degradation or prohibitive losses in fuel economy.

While ethanol is often viewed as a more sustainable alternative to pure gasoline, its chemical properties can affect certain engine components. The IIT Kanpur researchers sought to verify if these risks manifested in real-world usage. The findings indicate that for the majority of vehicles operating under standard conditions, the transition to E20 is manageable without requiring extensive engine modifications.

The laboratory results provide a technical basis for the continued rollout of blended fuels across the country. By quantifying the mileage loss, the research provides a benchmark for consumers and manufacturers to evaluate the trade-offs between environmental goals and vehicle performance.