In July 2025, the Union government announced with considerable fanfare that it had effectively reached the E20 milestone, reporting ethanol blending of 19.93% during the month and presenting it as the fulfilment of the target advanced from 2030 to ESY 2025-26 under the National Policy on Biofuels. Prime Minister Narendra Modi hailed it as a landmark in India’s energy transition. The announcement, however, triggered consumer backlash, online campaigns, RTI applications seeking disclosure of actual blend ratios at retail outlets, and a public interest litigation in the Supreme Court, filed by advocate Akshay Malhotra, seeking mandatory labelling of ethanol content at fuel stations and continued availability of ethanol-free petrol. On September 1, 2025, a bench comprising Chief Justice B.R. Gavai and Justice K. Vinod Chandran dismissed the petition, with the Attorney General characterising the petitioner as a “name lender” acting for a “huge lobby” – a striking response to a plea for basic consumer information.The controversy resurfaced on June 30, 2026, during the hearing of a Special Leave Petition filed by Bharat Petroleum Corporation Limited against a Karnataka high court order concerning ethanol allocation. Attorney General R. Venkataramani reportedly told a bench of Justice M.M. Sundresh and Justice Sheel Nagu that “20 per cent ethanol blending is something that the government is experimenting with” and that results would be available the following year. His office promptly issued a clarification denying that the national E20 programme had been described as an “experiment”, maintaining that the submissions related only to the commercial dispute before the Court.Whether or not the word was used in the broader sense attributed to it, the episode exposed the opacity surrounding the programme. A policy affecting roughly 300 million vehicle owners was implemented without public consultation, independent peer-reviewed assessment of its effects on the existing vehicle fleet, consumer choice of ethanol-free petrol, or any compensating price reduction. The ensuing controversy, official clarification and the Supreme Court’s order maintaining status quo on ethanol allocation together illustrate the political context in which the E20 programme has unfolded.The policy, on its own terms, makes sweeping promises. But what does the independent evidence suggest it delivers? Who bears its costs? Who captures its benefits, and does it survive a rigorous social cost-benefit analysis?A timeline of E20 policyIndia’s Ethanol Blended Petrol (EBP) Programme began in 2003 but progressed slowly, with blending reaching barely 1.5% by 2014. The National Policy on Biofuels, 2018, targeted 20% blending by 2030, but in 2021, Modi advanced the deadline to Ethanol Supply Year (ESY) 2025-26. Oil Marketing Companies achieved 10% blending in June 2022, five months ahead of schedule, followed by averages of 14.60% in ESY 2023-24 and 17.98% in ESY 2024-25. The roadmap envisaged expanding ethanol production capacity from 700 to 1,500 crore litres, introducing E20 in phases from April 2023 and making it available nationwide by April 2025.A critical feature of this timeline received little public attention. Vehicle manufacturers were expected to introduce E20-compatible models only from April 2023, with engines fully optimised for E20 arriving from April 2025. Yet the country’s vast existing fleet – designed largely for E10 or lower – was effectively required to use E20, without any option to purchase ethanol-free petrol.Consumers paying dearly for petrolThe impact of E20 must be assessed against India’s already high fuel prices. On June 29, 2026, E20 petrol retailed in India at about Rs 108.71 per litre (US$ 1.15), compared with a global average of US$ 1.36 for mostly E5 to E10 petrol. The comparison, however, is misleading because the global average is inflated by high-income countries. Brazil provides the most economically meaningful benchmark because consumers routinely compare fuels on a cost-per-kilometre basis. More relevantly, regular (non-ethanol) petrol was cheaper in Pakistan (US$0.90), Bangladesh (US$1.03) and marginally costlier only in Nepal (US$1.19) and China (US$1.24), despite India’s large refining capacity and access to discounted Russian crude since 2022.Measured against incomes, the burden becomes starker. At the national floor wage of about Rs 350 per day, a worker spends nearly one-third of a day’s earnings to buy a litre of petrol. Fuel taxation remains among the principal reasons. Between 2014 and 2020, as global crude prices fell sharply, the Union government repeatedly increased excise duties instead of passing the gains to consumers. Excise duty was raised again by Rs 10 per litre in May 2020, pushing central excise collections from Rs 2.38 lakh crore to Rs 3.84 lakh crore in 2020-21 – a 67% increase.Against this backdrop, consumers receive no price advantage from E20 despite its lower energy content and lower production cost. While ethanol blending may reduce the national oil import bill, those savings are not reflected in retail prices. Consumers thus pay the same price for a fuel that delivers less energy per litre, effectively increasing the cost of mobility while the fiscal gains accrue elsewhere. This is the economic context in which the E20 programme has been implemented.What energy are consumers actually buying?Government communication on E20 highlights higher octane ratings, lower emissions and only a “marginal” impact on mileage, while largely ignoring the fundamental issue of energy content. Ultimately, it is the fuel’s calorific value that determines how much useful work a litre of fuel can perform.The science is straightforward. Petrol has a calorific value of roughly 32-34 MJ per litre, whereas ethanol contains only about 21.4 MJ per litre. In energy terms, one litre of petrol is equivalent to roughly 1.5 litres of ethanol. These are well-established thermodynamic facts, recognised internationally and not matters of policy debate.An E20 blend therefore contains approximately 6-7% less energy per litre than pure petrol. A vehicle calibrated for conventional petrol should, other things being equal, experience a broadly similar reduction in fuel economy. This theoretical loss closely matches the government’s own acknowledgement of a modest decline in mileage, although official publicity seldom explains that the reduction stems from the fuel’s inherently lower energy density.Consumers, however, pay virtually the same price per litre for E20 as for petrol. This means, motorists actually pay 6-7% more for the same trip. Across India’s vast petrol vehicle fleet, the cumulative transfer from consumers through reduced energy content runs into thousands of crores annually, even though the reduction is neither explicitly disclosed nor reflected in pump prices. It is a veritable scam comparable to any other. The government argues that vehicles specifically engineered for E20 can recover much of this efficiency loss through higher compression ratios and engine optimisation. That claim is technically sound – but only for engines designed and calibrated for E20. The official rollout itself envisaged such vehicles only from April 2025. The overwhelming majority of vehicles already on Indian roads were designed for E10 or lower, meaning that, for them, the calorific deficit is real and translates into lower fuel economy without any compensating reduction in price.Independent surveys have reported even larger reductions under real driving conditions than indicated by 6-7% energy content, with some users experiencing mileage losses of 10-15%.The greater concern is compatibility with India’s existing vehicle fleet. Most petrol vehicles on the road were designed for E10 or lower. Prolonged use of E20 may accelerate deterioration of fuel-system components because ethanol readily absorbs moisture, increasing corrosion and material degradation. Since two-wheelers account for nearly 60% of petrol consumption, these costs fall disproportionately on lower-income users. Automobile experts also acknowledge the absence of comprehensive independent Indian studies on the long-term effects of E20 on legacy vehicles.Government’s case – and the evidenceThe government defends E20 on four grounds: that it enhances energy security, reduces greenhouse-gas emissions, increases farm incomes, and lowers the oil import bill. Since 2014, ethanol blending is estimated to have displaced about 245 lakh metric tonnes of crude oil, saving roughly Rs 1.4 lakh crore in foreign exchange, while E20 is projected to reduce annual import costs by US$ 6-10 billion. Official estimates further claim that lifecycle emissions from sugarcane ethanol are around 65% lower than petrol and those from maize ethanol about 50% lower, with E20 reducing carbon emissions relative to E10. The programme has also generated nearly Rs 1 lakh crore in payments to farmers and stimulated investment in more than 200 distilleries. These claims, however, require scrutiny against independent evidence.Environmental gains: more complex than claimedIndependent assessments suggest that the programme’s net climate benefits are substantially smaller than official estimates once fertiliser use, transport emissions and land-use change are included, placing annual emission reductions closer to 18-22 million tonnes of CO₂ equivalent rather than the government’s estimate of 40 million tonnes. Moreover, while ethanol blending reduces emissions of carbon monoxide and unburnt hydrocarbons, it also increases emissions of aldehydes such as acetaldehyde and formaldehyde, particularly from older vehicles. A policy that highlights one set of environmental gains while downplaying offsetting costs presents, at best, an incomplete environmental accounting.The environmental balance sheet is further complicated by the growing dependence on maize and sugarcane. A policy brief by the Centre for Study of Science, Technology and Policy notes that expanding ethanol production has contributed to higher maize prices, greater fertiliser use and additional emissions arising from land-use change, especially where maize is the principal feedstock.Food, water and fiscal costsThe diversion of food grains to ethanol production raises another concern. Increasing quantities of rice from the public distribution system and maize from food markets are now used as feedstock, intensifying the food-versus-fuel dilemma and potentially adding to food inflation. Grain supplied to distilleries at subsidised prices also represents an implicit transfer from the public food-security budget to the ethanol industry.Water use is equally problematic. Producing one litre of ethanol may require 2,000-3,000 litres of water, depending on feedstock and cultivation practices. Expansion of sugarcane and maize cultivation in water-stressed states such as Maharashtra, Uttar Pradesh and Karnataka therefore risks aggravating groundwater depletion and imposing long-term ecological costs that are absent from official cost-benefit calculations.Why the automobile industry has remained silentMajor manufacturers, including Maruti Suzuki, Toyota and Hero MotoCorp, have publicly supported E20, citing laboratory tests that indicate no excessive wear in vehicles meeting prescribed specifications. The Society of Indian Automobile Manufacturers has likewise assured consumers that warranty coverage will continue for compliant vehicles. Yet these assurances rest largely on manufacturer testing rather than independent long-term evaluations of India’s enormous legacy vehicle fleet. That gap in evidence remains one of the weakest aspects of the E20 rollout.Why the automobile industry has not opposed E20 is best explained through its political economy rather than technical claims alone.First, replacement incentives. Higher ethanol blends may accelerate wear in older vehicles not designed for E20, increasing demand for repairs and, eventually, vehicle replacement. Manufacturers therefore have little commercial incentive to press for continued availability of ethanol-free petrol.Second, regulatory dependence. Every new vehicle model requires government approval, while emission and safety standards are framed through the Ministry of Road Transport and Highways and the Automotive Research Association of India (ARAI). Public opposition to a flagship government policy could strain relationships with the very regulators on whom manufacturers depend.Third, global precedent. Companies such as Maruti Suzuki, Hyundai and Toyota point to international experience with ethanol blends. The comparison is incomplete. In countries such as Brazil and the United States, consumers retained a choice of fuel blends, the transition unfolded over decades, and vehicle technology largely evolved before, rather than after, higher ethanol mandates were introduced.Fourth, future market incentives. The government has consistently promoted Flex Fuel Vehicles (FFVs) capable of operating on varying petrol-ethanol blends. Manufacturers have a commercial interest in supporting the present policy if it accelerates the emergence of a future FFV market.Consumers occupy a very different position. They neither benefit from higher vehicle replacement rates nor participate in policy formulation. Their principal legal challenge – a Public Interest Litigation seeking mandatory disclosure of ethanol content and continued availability of ethanol-free petrol – was summarily dismissed by the Supreme Court on September 1, 2025, accepting the government’s position that consumers cannot dictate fuel composition. Whatever the legal merits of that conclusion, it effectively closed the principal judicial avenue through which consumers sought greater transparency and choice.India’s approach is an outlierThe government frequently invokes Brazil and the United States as models for its ethanol policy. A closer comparison highlights how distinctive India’s approach has been.Brazil’s ethanol programme dates back to the Proálcool initiative of the 1970s and evolved over five decades through sustained investment in sugarcane production, flex-fuel technology and consumer incentives. Today, most new passenger cars are flex-fuel, allowing motorists to choose between petrol and ethanol according to prevailing prices. Retail outlets prominently display both fuels, and consumers generally opt for ethanol only when it is priced at about 70% or less of petrol, reflecting its lower energy content.The United States follows a similarly consumer-oriented approach. While E10 is the standard blend, higher blends such as E85 are available only for compatible flex-fuel vehicles. Several European countries, including Germany, France and Finland, continue to offer consumers a choice between E5 and E10, supported by clear labelling and compatibility guidelines.India’s transition has been markedly different. E20 has rapidly become the default fuel across much of the country even though most existing vehicles were designed for lower ethanol blends, while ethanol-free petrol is effectively unavailable in most retail outlets. Unlike Brazil, the United States or much of Europe, the transition has proceeded with limited consumer choice, little public disclosure of supporting technical studies and no price differential reflecting ethanol’s lower energy content.Who benefits?The claim that E20 benefits farmers is only part of the story. The principal beneficiaries are the sugar mills and distilleries that supply ethanol, many of which have long-standing political connections. In Maharashtra, Uttar Pradesh and Karnataka – the states that produce about 81% of India’s sugar – send more than 158 members to the Lok Sabha.One question has received surprisingly little attention: why has Nitin Gadkari, the Union Minister for Road Transport and Highways emerged as the principal public advocate of ethanol blending when the programme falls under the Ministry of Petroleum and Natural Gas?The Ethanol Blended Petrol (EBP) Programme is administered by the Ministry of Petroleum and Natural Gas, headed by Hardeep Singh Puri. The Ministry of Road Transport and Highways, led by Nitin Gadkari, is responsible for vehicle regulation, safety standards and road infrastructure. Yet, it has been Gadkari – not the petroleum minister – who has most visibly championed E20. He promised petrol at Rs 55 per litre through ethanol in 2018, repeatedly promoted its benefits in public forums, unveiled Flex Fuel Vehicles, and advocated further expansion of the ethanol economy.Part of this activism may be ideological. Gadkari has long been identified with the RSS’s emphasis on swadeshi, rural industrialisation and energy self-reliance, themes that align closely with the stated objectives of the ethanol programme. But this ideological affinity cannot be viewed in isolation from the documented commercial interests of members of his family in ethanol production. Gadkari’s son Nikhil Gadkari controls CIAN Agro Industries and Infrastructure Ltd., while another son Sarang Gadkari serves as a director of Manas Agro Industries, which operates a large grain-based distillery in Maharashtra. Public filings show that CIAN Agro’s revenue rose sharply during the final phase of the E20 rollout, accompanied by an extraordinary appreciation in its share price.Whatever the legal position, the coexistence of policy advocacy and significant family business interests creates at least the appearance of a conflict of interest – one that merits independent scrutiny in the interest of public confidence. Prices are fixed by the central government and procurement volumes are driven by mandatory blending targets. Opposition parties consequently demanded an independent inquiry, arguing that policymakers responsible for designing the blending programme should not be seen to benefit, directly or indirectly, from industries whose fortunes depend on that policy.Meanwhile, smaller distilleries have complained of unequal access to procurement quotas, while many cane farmers continue to face delayed payments despite the rapid expansion of the ethanol programme. The gains from ethanol blending, therefore, appear to be distributed far more unevenly than official rhetoric suggests.The democratic deficitThe central issue, however, extends beyond any individual minister. The E20 programme illustrates a broader pattern in contemporary policymaking. A decision affecting hundreds of millions of vehicle owners was accelerated from the original 2030 target to ESY 2025–26 without public consultation, detailed parliamentary scrutiny of its technical implications, or publication of comprehensive independent impact assessments.Consumers have reported concerns about fuel economy, vehicle compatibility and the disappearance of ethanol-free petrol, while seeking greater transparency about blend ratios and technical evidence. The principal consumer challenge before the Supreme Court was dismissed, and the subsequent controversy over the Attorney General’s reported description of E20 as an “experiment” only reinforced public uncertainty rather than confidence.The broader question is therefore not whether ethanol blending has potential benefits. The issue is whether a policy of such scale should proceed without meaningful consumer choice, transparent disclosure of the evidence on which it rests, and an open accounting of its costs as well as its gains. India has introduced a lower-energy fuel at essentially the same retail price while asking consumers to absorb the consequences without adequate information or alternatives.The E20 debate thus raises questions that reach beyond biofuels. It concerns the standards by which public policy should be made in a constitutional democracy: transparency, informed consent, accountability and the management of conflicts of interest. If the government intends to move towards E27 or E30, those standards become even more important. The supporting studies should be placed in the public domain, potential conflicts of interest independently examined, and consumers restored a meaningful voice in decisions that directly affect their vehicles, livelihoods and daily lives.Anand Teltumbde is a former CEO of Petronet and professor at IIT Kharagpur and GIM, Goa. He is also a writer and civil rights activist.