E20 FUEL: A SUSTAINABLE PATHWAY FOR INDIA'S ENERGY FUTURE

ABSTRACT E20 fuel, a blend consisting of 20% ethanol and 80% petrol, has emerged as a strategic solution to enhance energy security, reduce emissions, and support sustainable transportation. Ethanol, being a renewable, domestically produced biofuel, improves the octane rating of gasoline and enables cleaner combustion. Adoption of E20 is driven by global concerns over fossil fuel depletion, climate change, and the need to reduce dependency on imported crude oil. Research shows that E20 can significantly lower carbon monoxide (CO), hydrocarbons (HC), and particulate emissions, contributing to improved air quality. While fuel economy may experience a slight reduction due to ethanol’s lower energy content, this is offset by better combustion efficiency and reduced knocking. Engine compatibility studies indicate that most modern spark-ignition vehicles can operate on E20 with minimal modifications, though long-term material compatibility and durability assessments remain areas of ongoing investigation. In India, E20 adoption is aligned with the National Biofuel Policy (2018) and subsequent government initiatives aiming to achieve holistic decarbonisation in the transport sector. Increased ethanol blending also benefits the agricultural sector by creating demand for feedstocks such as sugarcane and damaged grains. However, challenges persist in terms of production capacity, supply-chain logistics, water use, and ensuring consistent quality of ethanol across regions. Overall, E20 fuel represents a promising transitional pathway toward greener mobility. Its successful implementation requires coordinated efforts involving policy support, technological adjustments, and expansion of biofuel infrastructure. Continued research can help optimise engine performance, long-term durability, and environmental impact under widespread E20 usage. Keywords: E20 Fuel, Ethanol Blending, Renewable Transport Fuel, Fossil Fuel Reduction