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Nitin Gadkari: Isobutanol-Diesel Blending To Rise, Ethanol Blend To Go Up For SAF
Union Road Transport Minister Nitin Gadkari has announced that the blending of isobutanol with diesel will soon be scaled up. Gadkari made the announcement while speaking at The India Sugar & Bio-Energy Conference 2025 and stated that work has already started on it reports the Economic Times.
Gadkari also confirmed that ethanol blending with petrol has now touched the 20% mark. He added that the government is working on increasing the ethanol blend for sustainable aviation fuel as part of its wider strategy to strengthen India's renewable energy sector.
The minister explained that ethanol blending programmes have directly impacted crop prices. Corn farmers, for example, have earned more than ₹42,000 crore under the current initiative. Surplus crops, such as corn, are increasingly being channelled into the energy sector, helping to secure steady incomes for farming communities.
He further said India is producing surpluses of rice, wheat, sugar, and corn. Converting these into biofuels has significantly raised farm earnings across states. Ethanol production, he pointed out, has also relieved the sugar industry from delays in payments to cane farmers, ensuring smoother financial flows.
Gadkari addressed concerns raised over the ethanol-blended petrol programme mandating 20% ethanol in petrol, stressing that fears about engine damage and warranty lapses were unfounded. All government testing agencies, he noted, have confirmed that no technical issues exist in implementing E20 fuel across the country.
Gadkari recalled that several petitions had been filed against the E20 mandate, questioning its legality and safety standards. He highlighted that the Supreme Court recently dismissed those petitions, removing major obstacles to implementation. This cleared the way for nationwide adoption of E20 petrol without legal uncertainty.
Gadkari underlined that ethanol blending is improving incomes for corn farmers while strengthening India's energy security profile. This direct link between agriculture and energy, he said, represents a core element of the government's strategy to support farmers and reduce reliance on imported fossil fuels.
| Aspect | Details |
|---|---|
| Fuel Properties | Isobutanol has higher energy content and lower water absorption than ethanol, making it more compatible with diesel engines already in use across India. |
| Emission Impact | Blending isobutanol with diesel reduces smoke, particulate matter, and carbon monoxide. Small blending levels require no major engine modifications, easing adoption. |
| Driver Experience | Performance differences are minimal at lower blends. Vehicles run smoothly with little to no effect on mileage or engine behaviour. |
| Sources | ResearchGate, IJERT, MDPI, SAE |
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