Having achieved E20 ahead of schedule, India is now enabling E100 and flex-fuel vehicles. Examine the opportunities and risks of moving beyond 20% ethanol blending.

India raised ethanol blending in petrol from below 1.5% in 2013-14 to 20% in ESY 2025-26, well before the original 2030 target [1]. In October 2026, MoRTH amended Rules 115 and 115E of the Central Motor Vehicles Rules, 1989. Fuel with up to 100% ethanol (E100) can now be used in flex-fuel vehicles (FFVs) [2]. Going beyond E20 brings real gains, but only if price, feedstock and consumer risks are managed.

Opportunities

• Energy security: Every extra litre of ethanol replaces imported crude oil and saves foreign exchange [3].
• Farm incomes: Maize supplied 0% of ethanol in 2021-22 and 36% in ESY 2023-24 [4]. FFV demand opens a market beyond the E20 limit.
• Regulatory certainty: E85/E100 are now listed in the emission rules, so manufacturers have a legal route to get FFVs certified [2].
• Engine performance: Ethanol's octane number is about 108.5, against 84.4 for petrol [6].

Risks

• Mileage penalty: Ethanol has about 30% lower calorific value than petrol [5]. If pump prices are not equal per km, FFV owners will simply fill petrol.
• Food vs fuel: 52 LMT of surplus FCI rice was allocated for ethanol [3]. Maize going to distilleries competes with poultry and dairy feed.
• Water stress: Cane and rice need a lot of water. Counting only distillery water use hides the water used to grow the crop.
• Consumer confusion: E10/E20 vehicles are not fit for E85. MoRTH had to clarify that no existing owner must switch [2].
• Incomplete ecosystem: E100 is allowed only "subject to the applicable fuel specification" [2]. Policy beyond 2026 still awaits an Inter-Ministerial Committee report [6].
• EV trade-off: Money put into combustion engines may slow the shift to electric vehicles.

Way Forward

• Link E85/E100 pump prices to petrol on a per-km basis.
• Carry out a water and food audit before setting any target above E20.
• Scale up 2G ethanol from crop residue under the expanded PM JI-VAN Yojana [7].
• Use separate nozzles and clear compatibility stickers at fuel pumps.

Moving beyond E20 is a sensible bridge for India's large fleet of petrol vehicles, not the final destination. With price parity, residue-based feedstock and clear labelling, E100 can strengthen energy security while serving SDG 7 and SDG 2, alongside the move to electric vehicles.