Ethanol Blending in India: Promise of Cleaner Fuel vs Risks to Engine Efficiency

•Syllabus: Energy*

•Source: BS*

Context: India achieved its E20 (20% ethanol-blended petrol) target by early 2025, ahead of schedule under the Ethanol Blended Petrol Programme. However, growing concerns over engine wear, fuel efficiency loss, and lack of consumer readiness are raising new challenges.

About Ethanol Blending in India: Promise of Cleaner Fuel vs Risks to Engine Efficiency:

What is Ethanol Blending?

• Definition: Ethanol blending refers to mixing ethanol (biofuel derived from biomass like sugarcane, corn, or rice) with petrol in ratios like E10, E20, etc.

• Benefits: Reduces greenhouse gas emissions and urban air pollution. Saves forex by cutting oil imports (estimated ₹1–1.5 lakh crore annually). Promotes renewable energy and supports rural agro-industries.

• Reduces greenhouse gas emissions and urban air pollution.

• Saves forex by cutting oil imports (estimated ₹1–1.5 lakh crore annually).

• Promotes renewable energy and supports rural agro-industries.

• India’s Policy Trajectory: E10 target achieved by 2022. E20 achieved by March 2025 (ahead of ESY 2025–26 deadline). New target: E30 blending by 2030, with food grain and 2G bioethanol as feedstocks.

• E10 target achieved by 2022.

• E20 achieved by March 2025 (ahead of ESY 2025–26 deadline).

• New target: E30 blending by 2030, with food grain and 2G bioethanol as feedstocks.

Initiatives taken for ethanol blending:

• Ethanol Blended Petrol (EBP) Programme:

• Launched in 2003 to blend ethanol with petrol for cleaner, sustainable fuel. Achieved 20% blending ahead of the 2025–26 target, rising from 1.53% in 2014 to 20% in 2025.

• Launched in 2003 to blend ethanol with petrol for cleaner, sustainable fuel.

• Achieved 20% blending ahead of the 2025–26 target, rising from 1.53% in 2014 to 20% in 2025.

• National Policy on Biofuels (2018):

• Expanded feedstock base beyond molasses to include sugarcane juice, corn, rotten potatoes, etc. Allowed use of FCI surplus grains, offering income avenues to farmers and managing excess stock.

• Expanded feedstock base beyond molasses to include sugarcane juice, corn, rotten potatoes, etc.

• Allowed use of FCI surplus grains, offering income avenues to farmers and managing excess stock.

• Financial and Regulatory Measures:

• Introduced fixed ethanol pricing by OMCs to ensure stable returns for producers. Offered interest subvention and capital aid for setting up molasses- and grain-based distilleries. Reduced GST on ethanol (EBP) from 18% to 5% to promote cost-efficiency. Signed Long-Term Offtake Agreements (LTOAs) to provide assured demand and revenue certainty.

• Introduced fixed ethanol pricing by OMCs to ensure stable returns for producers.

• Offered interest subvention and capital aid for setting up molasses- and grain-based distilleries.

• Reduced GST on ethanol (EBP) from 18% to 5% to promote cost-efficiency.

• Signed Long-Term Offtake Agreements (LTOAs) to provide assured demand and revenue certainty.

• Infrastructure and Technology Development:

• PM-JI-VAN Yojana promotes 2G ethanol from agri-waste like rice straw, reducing crop burning. Norms for E20 and draft rules for E100 vehicles released, OEMs now produce E20-compliant models. Over 17,000 outlets now retail E20 fuel and dedicated E100 pumps are being deployed.

• PM-JI-VAN Yojana promotes 2G ethanol from agri-waste like rice straw, reducing crop burning.

• Norms for E20 and draft rules for E100 vehicles released, OEMs now produce E20-compliant models.

• Over 17,000 outlets now retail E20 fuel and dedicated E100 pumps are being deployed.

• Roadmap and Global Alliances:

• “Ethanol Blending Roadmap 2020–25” guides blending targets and policy alignment. India-led Global Biofuels Alliance (GBA) aims to harmonise global biofuel efforts and standards.

• “Ethanol Blending Roadmap 2020–25” guides blending targets and policy alignment.

• India-led Global Biofuels Alliance (GBA) aims to harmonise global biofuel efforts and standards.

Technical & Environmental Concerns:

• Corrosion & Engine Wear:

• Ethanol absorbs moisture (hygroscopic), leading to:

• Corrosion of metal parts.

• Breakdown of plastic/rubber hoses and seals.

• Fuel system clogging due to deposit stripping.

• Fuel Efficiency Drop:

According to the NITI Aayog–MoPNG report:

• E20 causes 6–7% mileage loss in 4-wheelers and 3–4% in 2-wheelers. No parallel drop in fuel prices → user pays more per km.

• E20 causes 6–7% mileage loss in 4-wheelers and 3–4% in 2-wheelers.

• No parallel drop in fuel prices → user pays more per km.

• Cold Start and Performance:

• Higher blends like E20–E85 affect engine ignition in cold weather. Rough idling, stalling, or lower acceleration observed in older engines.

• Higher blends like E20–E85 affect engine ignition in cold weather.

• Rough idling, stalling, or lower acceleration observed in older engines.

• Limited Vehicle Compatibility:

• Most Indian two-wheelers are calibrated only for E10. Absence of flex-fuel vehicles or retrofit regulations for E20+ in mass segments.

• Most Indian two-wheelers are calibrated only for E10.

• Absence of flex-fuel vehicles or retrofit regulations for E20+ in mass segments.

Industry Readiness and Infrastructural Challenges:

• Automakers: SIAM calls for tech upgrades and regulatory clarity.

• Fuel Retailers: Need ethanol-compatible storage, pipeline, and pump systems.

• Feedstock Risks: Reliance on sugarcane and maize may hurt food security unless 2G bioethanol scales up.

Policy Recommendations:

• Engine Compatibility: Notify clear certification standards and incentivise rollout of flex-fuel vehicles designed for E20 and above.

• Mileage Loss: Provide tax rebates (e.g., GST reductions or mileage-linked incentives) to offset consumer costs from reduced fuel efficiency.

• Fuel Pricing: Consider differentiated pricing for blended fuels to reflect lower mileage and ensure consumer fairness.

• Infrastructure Upgrade: Modernize fuel retail systems with ethanol-resistant pipelines, storage tanks, and dispensing units nationwide.

• Feedstock Diversification: Promote second-generation (2G) ethanol using agricultural waste to avoid food security concerns and ensure supply stability.

Conclusion:

India’s ethanol blending program holds promise for energy security and climate goals. But to make it sustainable, the transition must be consumer-centric, technically compatible, and backed by robust vehicle, fuel, and infrastructure reforms. Ethanol must not become a green solution that corrodes public trust.