India’s automobile market is in a curious position right now. Vehicle retail sales hit a record 25.31 lakh units in May 2026, and passenger vehicle registrations crossed four lakh units in a single month for the first time. By almost every conventional measure, the market is booming. And yet, a sizeable and growing number of prospective buyers are choosing to step back because they are not sure what fuel it will run on a few years from now.
A LocalCircles survey gathering responses from over 28,000 prospective vehicle buyers across 311 districts found that 43% of respondents said they may defer or avoid purchasing a vehicle over the next 12 months, citing uncertainty around E20 petrol and the proposed transition to E30 fuel blends.
The anxiety is rooted in something real. India rolled out E20 petrol nationwide in April 2025, and the government has since notified standards for higher ethanol blends including E22, E25, E27, and E30, raising concerns among consumers about the long-term compatibility of their vehicles. For buyers about to spend anywhere between five and thirty lakh rupees on a new car, that uncertainty has a cost.
Only 6% of prospective buyers surveyed said they plan to purchase a new petrol vehicle in the next 12 months. For context, 7% said they intend to buy an electric vehicle and another 7% plan to purchase a hybrid, meaning EVs and hybrids combined are now drawing more than twice the prospective buyer interest that petrol vehicles are. The fuel roadmap is, at least in part, driving that shift.
The experiences of existing vehicle owners are a large part of why. A separate LocalCircles survey of over 50,000 respondents found that five in ten petrol vehicle owners reported a fuel efficiency decline of more than 10% since early 2025, and three in ten reported higher wear and tear or increased repair requirements involving engines, fuel pumps, and injectors.
The infographic from that survey tells its own story: 56% of pre-2023 petrol vehicle owners reported reduced mileage, 43% reported engine performance issues, and 34% reported increased repair and maintenance costs. Owners of older vehicles purchased before 2023 reported additional expenses ranging from Rs 5,000 to Rs 25,000 due to reduced mileage and increased maintenance costs.
These are not complaints from people who resist change on principle. They are consumers who bought vehicles in good faith, under a certain set of assumptions, and are now absorbing costs they did not sign up for.
The LocalCircles report called on the government to publish transparent, long-term testing data on the impact of higher ethanol blends, communicate a clear timeline for E30 implementation, and mandate the display of blend information at fuel stations. It also urged automakers to certify the E30 compatibility of new vehicles. These are reasonable asks. Without them, the market will continue making decisions based on fear rather than information, benefiting no one and hurting all.
What makes all of this more consequential is what lies further down the road. The government is not stopping at E30. India is planning to start distributing E85 and E100 fuels for flex-fuel vehicles, with E85 comprising 85% ethanol and 15% petrol, and E100 comprising 93-95% ethanol mixed with a small proportion of petrol and other solvents. This is a massive step-change, as E20-compliant vehicles cannot run on E85 or E100 without significant hardware changes, as the vast variance in ethanol content effectively makes them different fuel types.
The engineering demands are substantial too. Flex-fuel engines need around 30-40% more fuel to develop the same power output as petrol, requiring high-flow fuel pumps, larger injectors, and corrosion-resistant fuel system components, since ethanol absorbs moisture and can corrode whatever it contacts.
E85 and E100 will cost significantly less than the E20 petrol on sale today, about Rs.20 a liter less, or more. But those gains are more than offset by increased fuel consumption of E85 and E100 vehicles. The former is estimated to consume 20-30% more petrol, with E100 imposing an even steeper efficiency loss of around 35%.
The government’s argument is that lower prices will offset higher consumption, but exact pricing details for E85 and E100 remain under wraps. The rollout target currently stands at 50-100 ethanol dispensing stations in the Delhi-NCR and Mumbai-Pune-Nagpur corridor to start, scaling to 500 stations by December 2026 and 5,000 across major cities by end-2027.
India’s ethanol blending programme has genuine merit. It reduces dependence on crude imports, supports domestic sugarcane farmers, and, for purpose-built flex-fuel engines, can offer performance benefits alongside cleaner combustion. The intent is not in question. But intent and execution are different things, and right now, millions of car owners and buyers are stuck in the gap between them.
The government has a window to get ahead of this. Clear communication, credible testing data, and an honest transition timeline would cost very little and could restore a significant amount of buyer confidence. Without them, the ethanol story risks being remembered not as a smart pivot to energy independence, but as the policy that made petrol cars a liability and pushed buyers toward EVs before the charging infrastructure was ready for them.
