How E20 affects your car and what’s next on E85 rollout
India achieved 20% ethanol blending in petrol (E20) by March 2025 — five years ahead of the original 2030 target under the National Policy on Biofuels, 2018.
The Ministry of Petroleum has indicated plans to support even higher ethanol blends (E22 to E30) through excise duty waivers, as an interim step toward wider flex-fuel adoption.
The Ministry of Road Transport and Highways (MoRTH) released a draft notification in April 2026 recognising flex-fuel vehicles running on E85 (85% ethanol) and E100 (near-pure ethanol); approximately 48 retail outlets of public oil marketing companies began dispensing E85 fuel in June 2026.
Consumer concerns have emerged about fuel economy losses and engine wear in older vehicles not designed for E20, while automotive manufacturers maintain that properly calibrated vehicles perform adequately on the blend.
National Policy on Biofuels, 2018 and the Ethanol Blending Programme
The National Policy on Biofuels (NPB), 2018 — which came into effect on 16 May 2018 — is India's overarching framework for promoting domestic biofuel production and use. The policy set an indicative blending target of 20% ethanol in petrol (E20) and 5% biodiesel in diesel by 2030. In 2022, the 2030 target for E20 was advanced to 2025–26 through an amendment to the NPB 2018, reflecting India's accelerated progress. The Ethanol Blending Programme (EBP), administered by oil marketing companies under Ministry of Petroleum guidelines, procures ethanol from distilleries (sugar mills, grain-based distilleries) and blends it with petrol before supply to retail outlets.
Key Details
- NPB 2018 effective date: 16 May 2018; original E20 target: 2030.
- E20 target advanced to 2025–26 via a 2022 amendment to NPB 2018.
- E10 achieved in June 2022 (five months ahead of schedule).
- Blending progression: 12.06% (ESY 2022–23) → 14.60% (ESY 2023–24) → 17.98% (ESY 2024–25) → 20% achieved March 2025.
- Feedstocks permitted: sugarcane juice, B-heavy molasses, C-heavy molasses, grain (damaged food grains, rice, maize), lignocellulosic biomass.
India's E20 milestone represents successful early delivery of the NPB 2018 target; the current policy discussion is about what comes next — E22–E30 intermediary blends and a long-term E85/flex-fuel ecosystem.
Ethanol as Biofuel: Properties, Energy Content, and Vehicle Compatibility
Ethanol (C₂H₅OH) is an alcohol-based biofuel with an octane rating of approximately 108.5, significantly higher than standard petrol's rating of 84.4. The higher octane rating makes ethanol-blended fuels beneficial in high-compression engines tuned to exploit it, offering better anti-knock performance and improved acceleration. However, ethanol contains approximately 34% less energy per litre than petrol — meaning E20 fuel has about 6–7% lower energy content than pure petrol, which translates to measurable mileage loss in vehicles not specifically calibrated for the blend. Ethanol is also hygroscopic (absorbs water) and can corrode rubber seals and certain metals in older fuel systems not designed for high-blend compatibility.
Key Details
- Ethanol octane rating: ~108.5 (vs. petrol's ~84.4).
- Energy content of ethanol: ~21.2 MJ/litre (vs. petrol's ~32 MJ/litre) — approximately 34% lower.
- E20 fuel: Approximately 6–7% lower energy density than pure petrol.
- Flex-fuel vehicles (FFVs) are specifically engineered to run on any blend from E0 to E85/E100.
- Older vehicles may experience seal degradation, fuel filter clogging, and hard starting with high-ethanol blends.
The trade-off between ethanol's environmental and energy-security benefits and its lower energy density and compatibility constraints is at the heart of the consumer concerns around E20 — and will intensify as India moves toward E85.
Energy Security and Import Substitution: Economic Case for Ethanol Blending
India is the world's third-largest oil importer, with crude oil imports representing a significant share of the national import bill. Domestic ethanol production primarily from sugarcane and grains displaces crude-derived petrol, directly reducing foreign exchange outflows. According to official data, the EBP over the last decade saved approximately ₹1.06 trillion (around $12 billion) in crude oil import costs and avoided approximately 54.4 million tonnes of carbon emissions. Additionally, higher ethanol prices paid to distilleries support the sugarcane farmer supply chain, connecting agricultural policy with energy policy — a rare linkage that gives the EBP a multisectoral political constituency.
Key Details
- India: Third-largest global crude oil importer.
- Savings from EBP over the decade: ~₹1.06 trillion in avoided crude import expenditure.
- Carbon emissions avoided: ~54.4 million tonnes over the decade.
- Ethanol supports the sugarcane sector: distilleries tied to sugar mills; excess sugarcane supply diverted to ethanol avoids market glut.
- Ethanol blending also reduces tailpipe emissions of CO, hydrocarbons, and particulate matter.
The government's push beyond E20 (excise waivers on E22–E30, infrastructure for E85) is driven primarily by energy security and forex savings logic — not merely environmental goals.
Flex-Fuel Vehicles (FFVs) and E85: Policy and Technology
A flex-fuel vehicle (FFV) is one whose engine management system, fuel system materials, and sensors are designed to automatically adapt to any blend of petrol and ethanol from E0 to E85 or E100. FFV readiness requires changes to fuel injection sensors, engine calibration, fuel-line materials (ethanol-resistant), and on-board diagnostics. MoRTH's April 2026 draft notification to recognise E85 and E100 vehicles represents a regulatory step toward mandatory or incentivised FFV adoption. Several original equipment manufacturers (OEMs) have introduced flex-fuel models in India, initially for the two-wheeler and three-wheeler segments. Brazil is the global benchmark for high-blend ethanol programmes — having run E100 fuel in a large vehicle fleet since the 1970s under the PROÁLCOOL programme.
Key Details
- E85: 85% ethanol + 15% petrol blend; requires dedicated FFV or FFV-capable engine.
- E100: Near-pure ethanol fuel (used in Brazil's fleet vehicles).
- ~48 retail outlets began E85 dispensing in June 2026, serving as pilot locations.
- MoRTH draft notification (April 2026): Proposed recognition of E85 and E100 vehicles in India's regulatory framework.
- Brazil's PROÁLCOOL programme (launched 1975): The established global model for national-scale high-ethanol fuel deployment.
E85's rollout requires a coordinated policy (MoRTH vehicle standards) + infrastructure (dedicated fuel pumps) + supply (ethanol production scale-up) effort — the current news reflects the early stage of this transition.
- National Policy on Biofuels 2018: Target of E20 by 2030; revised to 2025–26 in 2022.
- E20 achieved: March 2025 (five years ahead of original schedule).
- Energy density of ethanol: ~34% lower than petrol by volume.
- Ethanol octane rating: ~108.5 (vs. petrol ~84.4).
- EBP savings over the decade: ~₹1.06 trillion in crude import costs avoided; ~54.4 million tonnes CO₂ equivalent avoided.
- E85 pilot: ~48 retail outlets as of June 2026.
- MoRTH draft notification (April 2026): Proposed recognition of E85/E100 flex-fuel vehicles.
- Excise duty waiver proposed for E22–E30 blends to bridge E20 to E85 transition.