On ethanol fuel, move slower — with a plan

📌 Summary:

• Context: Centre is going slow on ethanol blending beyond the current 20% (E20), even though the Finance Ministry last month exempted petrol with 22/25/27/30% ethanol from excise duty after BIS issued specifications for higher blends

• Core argument: the pause is sensible — India's blending ratio rose 5% → 10% between 2019-20 and 2021-22, then doubled to 20%, with E20 mandatory for all petrol from April 2026, well before the original 2030 deadline; such speed warrants consolidation, not acceleration

• Motorist concerns (causal mechanisms): (1) ethanol's calorific value is 30-35% lower than pure petrol → reduced mileage; (2) ethanol is hygroscopic (absorbs moisture) → corrosion of steel fuel tanks and internal metal components; (3) only vehicles sold after April 2023 are fully E20 material-compatible → owners of older cars/two-wheelers feel short-changed, having never been told of these effects at purchase

• Why biofuels must still continue: India imports ~90% of its crude petroleum — the Iran war will not be the last global oil supply shock; energy security demands reduced import dependence

• Solutions proposed: transparent communication with consumers before E25/E30 rollout; fiscal measures to make higher blends cheaper than E20; a clear, calibrated, forward-looking roadmap avoiding abrupt rollouts; shift feedstock away from water-guzzling rice towards sweet sorghum, bajra and other millets, with breeding of varieties/hybrids having higher starch content and fermentation efficiency comparable to maize or sugarcane

🎯 UPSC Relevance: GS3 — energy security, biofuels, Ethanol Blending Programme; GS3 agriculture — feedstock choices and water stress; policy design lessons (calibrated transition vs abrupt mandates)

📝 Prelims Facts:

• E20 is mandatory for all petrol sold in India from April 2026 (original target: 2030)
• Ethanol's calorific value is 30-35% lower than petrol; it is hygroscopic (moisture-absorbing)
• Vehicles sold after April 2023 have full E20 material compatibility

🔑 Key Term: Ethanol Blending Programme (EBP) — flagship biofuel programme mixing ethanol with petrol to cut crude imports, save forex and lower emissions; blend grades denoted E20/E25/E30