Sustainability of India’s E20 Ethanol-Blending Programme

Context
The E20 programme, which blends 20% ethanol with petrol, has faced criticism over its possible impact on older vehicles and consumer costs. The government, however, highlights its benefits in terms of reduced crude-oil imports, foreign-exchange savings and support to domestic ethanol production.

Key Highlights

• India achieved the 20% ethanol blending target in 2025, rising from around 10% in 2022. Distillery capacity has expanded to nearly 18 – 20 billion litres across about 500 distilleries.
• Major feedstocks include maize (45%), FCI rice (22%), sugarcane juice (16%) and molasses (~11%).
• Vehicles manufactured after April 2023 under BS-VI Phase 2 are designed to be E20-compatible, while concerns remain regarding the large stock of older vehicles.
• Ethanol is hygroscopic, meaning it absorbs moisture, which can affect certain materials and components in older fuel systems.
• Direct imports of ethanol for blending are restricted, reducing concerns over excessive dependence on imported feedstock.

Key Concepts

• Ethanol Blended Petrol (EBP) Programme: Government initiative to blend ethanol with petrol to reduce crude-oil imports, improve energy security, support farmers and lower emissions. E20 = 20% ethanol + 80% petrol.
• Energy Security & Import Substitution: Replacing a portion of imported fossil fuels with domestically produced biofuels to reduce external dependence.
• Hygroscopic Nature: Ethanol absorbs moisture from the atmosphere, which may contribute to corrosion or degradation of certain components in older vehicles.
• First- vs Second-Generation Ethanol: First-generation ethanol is produced from food crops such as sugarcane and maize, whereas second-generation (2G) ethanol is produced from agricultural residues and other biomass waste.

Way Forward

• Adopt a phased and transparent E20 rollout with clear consumer advisories and adequate testing.
• Accelerate the transition towards 2G, waste-based ethanol to reduce food-versus-fuel competition and water-use concerns.
• Conduct independent assessments of E20’s impact on legacy vehicles and provide suitable retrofitting or compensation mechanisms where required.
• Promote feedstock diversification and water-efficient crops to improve the long-term sustainability of ethanol blending.