India’s Union Road Transport and Highways Minister Nitin Gadkari says the government plans to introduce up to 15% isobutanol blending in diesel as part of its next phase of biofuel transition. The move is intended to reduce dependence on imported fossil fuels and expand use of cleaner, domestically produced alternatives. Gadkari also links the plan to the fuel conversion pathway: ethanol cannot be blended directly with diesel, so the government is working to convert ethanol into isobutanol to enable its use as a diesel substitute. Sources note that pilot demonstrations have reported promising results, including tests where generator sets run using 100% ethanol and isobutanol, suggesting that engines can be adapted to operate efficiently on such fuels. Isobutanol is described as a next-generation biofuel because it has higher energy density than some other alternatives, is more compatible with existing diesel engines, and is associated with lower emissions relative to several traditional biofuels. The announcement follows broader government efforts around ethanol blending, including India’s earlier achievement of a 20% ethanol blend in petrol ahead of schedule.