By P. SESH KUMAR
The government’s ethanol blending programme has strengthened India’s energy security and supported farmers, but concerns over mileage, legacy vehicles, pricing and consumer choice continue to fuel debate.
New Delhi, July 7, 2026 — Ethanol in the Indian petrol tank is not a 2026 novelty; it is a slow-burning ambition that finally caught fire. The Ethanol Blended Petrol programme has run in some form since 2003, but it was the National Policy on Biofuels of 2018 that gave it a headline number and a horizon: twenty percent ethanol in petrol by 2030.
In December 2020 the Cabinet Committee on Economic Affairs pulled that finish line forward to 2025, and the NITI Aayog’s Roadmap for Ethanol Blending in India 2020–25, released in June 2021, converted the aspiration into a phased engineering and supply plan.
The trajectory since has been steep: from about 1.5 percent blending in 2013–14 to the twenty-percent mark the government says was reached in December 2025, five years ahead of the original deadline.
What began as blending became, by degrees, a mandate. Vehicles certified merely to tolerate E20 materials began rolling off assembly lines with the BS-VI Phase 2 norms of April 2023; vehicles actually tuned to run optimally on E20 arrived only from April 2025, which is also when nationwide E20 availability was declared.
From 1 April 2026, every petrol pump in the country was required to sell E20 with a minimum octane rating of 95, and unblended petrol all but vanished — surviving only as costly premium grades such as Indian Oil’s XP100 at north of Rs 150 a litre.
The rationale is not trivial and deserves to be stated at its strongest. India imports the overwhelming share of its crude; every litre of home-distilled ethanol is forex retained, a barrel not bought, and a payment routed to a cane or grain farmer rather than to a Gulf terminal.
The government’s own ledger claims foreign-exchange savings above Rs 1.9 lakh crore, farmer payments exceeding Rs 1.6 lakh crore, and roughly 310 lakh metric tonnes of crude displaced since 2014–15. On the arithmetic of the nation, this is a win. The quarrel is about the arithmetic of the household.
If we strip away the noise–the viral videos of sugarcane juice in petrol, the claims that a litre of ethanol drinks ten thousand litres of water, the folklore about ants swarming the fuel cap–all of which the government has plausibly rebutted,8 a hard core of legitimate disputes remains.
Virality vs Reality
First, mileage: ethanol carries roughly a third less energy per litre than petrol, so an engine not calibrated for it travels fewer kilometres on the same rupee.
Second, material compatibility: ethanol is hygroscopic, drawing moisture from the air, and that moisture attacks rubber seals, gaskets and fuel lines never designed to meet it-a matter of materials science, not myth.
Third, the compatibility cliff: the vast bulk of the on-road fleet was engineered for E10 or lower, with genuine E20 hardware arriving only from 2023–25, leaving crores of vehicles straddling the divide.
Fourth, and most piercing, the disappearance of choice: a motorist whose vehicle predates the E20 era can no longer simply buy a gentler blend.
Fifth, price: the pump charges the same rupees per litre for a fuel that yields fewer kilometres, with no discount passed on despite ethanol being domestically produced.
Sixth, who pays: the cost of adapting or servicing older vehicles has landed on the owner, not the state. And running beneath them all is a trust deficit, crystallised this week when the Attorney-General was reported to have called E20 an “experiment” in open court–a word the government has since laboured to explain away as referring to a procurement contract, not the science.
The charge that the Government sprinted where the world walked must be split into two, because one half is weak and the other is strong.
The weak half is the attack on the chemistry. Ethanol blending is not an Indian experiment conducted on unsuspecting citizens; it is a technology with half a century of global service.
The Automotive Research Association of India ran trials over some 40,000 kilometres in cars and 20,000 in two-wheelers and reported no significant adverse impact on drivability, with only marginal mileage change and the incidental benefit of ethanol’s higher octane.
Maruti Suzuki puts the E10-to-E20 mileage penalty at 3–3.5 percent; Hero MotoCorp says its service data across crores of two-wheelers shows no elevated failure rate; the Supreme Court, in September 2025, dismissed the petitions and declared blended petrol legal.
To the extent the critique implies E20 will melt engines, it overreaches, and the more lurid social-media arithmetic–twenty-percent efficiency collapse, a Rs 70,000-crore retrofit bill — rests on illustrative assumptions rather than audited numbers.
The strong half is the attack on the sequencing, the choice and the cost. Here the most damning witness is the government’s own roadmap.
The 2021 NITI Aayog report expressly estimated a 6–7 percent efficiency loss for four-wheelers designed for pure petrol and calibrated for E10, 3–4 percent for such two-wheelers, and 1–2 percent even for vehicles built for E10 and calibrated for E20.
The same document recommended that blended fuel be priced below ordinary petrol to compensate for the lost calorific value, and that tax incentives cushion the consumer. Both recommendations were quietly ignored. The warning was written, signed and shelved.
The road-versus-lab gap isn’t trivial
Successive LocalCircles surveys, drawing tens of thousands of responses, found the share of pre-2023 owners reporting mileage drops above ten percent climbing from around a third to roughly two-thirds within months, with complaints of accelerated wear and higher service bills rising in step–and, tellingly, owners of 2023–2026 vehicles beginning to report losses too.
Perception surveys are self-selecting and cannot be mistaken for metered fuel-economy data; but when a majority of a fleet reports the same lived experience, the burden shifts to the state to explain the divergence, not to wave it away. The rush critique, in short, misfires on the molecule and lands squarely on the method.
The defence stands firm on three legs and wobbles on two. It is justified on the science: E20 is a real, tested, globally-used fuel, and the claims of catastrophic engine failure, insect infestation and warranty voidance have been credibly answered.
It is justified on energy security: displacing crude and retaining forex in a country importing the bulk of its oil is a sovereign good, not a slogan. And it is justified, in the aggregate, on farm incomes: the programme has channelled real money to cane and grain growers who have historically waited longest to be paid.
Where the defence grows thin is on the two questions the ten-point rebuttal never quite answers. The first is the question of choice and cost: it tells the citizen that E20 is safe, but not why the citizen should have been denied the option of a gentler blend, nor why the bill for adapting a fourteen-crore-strong legacy fleet should rest on the owner rather than on the exchequer that banked the forex.
The second is the question of price. The “ethanol is cheaper” story is real at the pump’s base but complicated underneath: grain-based ethanol carries a true cost that the CEEW estimates at roughly Rs 95 a litre for maize and Rs 126 for rice–well above the oil marketing companies’ procurement price– sustained by selling surplus FCI rice to distillers at a fraction of its economic cost.
The consumer thus pays full price for fewer kilometres while a hidden subsidy flows to feedstock producers–a transfer that may be defensible, but which the defence prefers not to narrate.
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Self-inflicted wound of communication
Three ministries–Petroleum, Road Transport, and Information & Broadcasting–own pieces of this story and none owned the message to the motorist. The result was a vacuum that misinformation rushed to fill, and a courtroom aside about an “experiment” that detonated into a national flashpoint precisely because trust had never been banked in advance.
The auto industry’s July 2026 press conference, and the government’s ten-point note, were the sound of a state explaining after the fact what it should have negotiated before it. Defensible policy, indefensibly delivered.
Every nation that one may cite as precedent did the one thing the Government did not: it kept the motorist’s choice alive.
Brazil, the archetype, began its ethanol drive in the 1975 oil shock and took the better part of five decades to mature a flex-fuel fleet that now makes up the overwhelming share of new sales.
At virtually every Brazilian pump the driver chooses between blended petrol–today around 27 percent ethanol–and near-pure E100, and picks by price. Choice, price incentive and phasing did the persuading; the mandate merely set the direction.13
The United States built E10 to roughly 95 percent of its petrol over a generation, not a triennium; higher blends such as E15 sit at only about a tenth of stations and were cleared conditionally for model-year 2001 and newer vehicles, while E85 rides on separate flex-fuel engines through blender pumps that let a single forecourt offer several grades.
Europe went further on consumer protection: France, Germany and the United Kingdom made E10 standard, yet deliberately retained E5 for older cars, wrapped in strict labelling to prevent misfuelling. The through-line is unmistakable–certify, label, protect the legacy fleet, incentivise, and only then let the higher blend become the default.
Two structural asymmetries sharpen the contrast, and they are precisely the ones the critics press. First, feedstock endowment: the American corn belt and Brazilian cane frontier command spare arable land on a scale India cannot match, so India blends by diverting surplus rice and maize– importing a food, water and fiscal trade-off that land-rich nations largely escape.
Second, and decisively, choice: those countries offer a graded menu–E0 or E5 for the old, E10 for the many, E85 for the flex-fuel enthusiast –whereas we in India, having reached E20, made it the only fuel on the forecourt.
A driver in Delhi who wants unblended petrol must hunt for one of a handful of premium pumps and pay around Rs 160 a litre for the privilege.
Adopting World’s Destination while Skipping the World’s Road
The first lesson is to mandate the molecule without mandating a monopoly. A transition can compel the direction of travel while still keeping a graded menu–an E0, E5 or E10 lifeline– available for the legacy fleet until it retires.
The second is that the honest unit of a fuel policy is the rupee per kilometre, not the rupee per litre; a state that removes choice owes the consumer a compensating price signal, exactly as NITI Aayog itself advised in 2021 and was ignored.
The third is sequence. The durable transitions ran certify ‘to’ label ‘to’ protect warranties ‘to’ build flex-fuel ‘to’ then default to higher blends; we inverted the order, making the blend universal before the fleet, the labelling and the trust were ready.
The fourth is a principle of fairness as old as public finance: he who reaps the gain should bear the adjustment cost. The forex and farm dividends accrued to the nation; the retrofit and mileage penalty fell on the household. That bill belonged at the Finance Ministry, not the mechanic’s counter.
The fifth is fiscal candour–publish the true, subsidy-inclusive cost of grain-based ethanol so the country can debate the trade-off with open eyes.
And the sixth is that communication is not an afterthought to policy but part of its engineering; a reform imposed on fourteen crore people needs a single, named, credible owner of its message.
Course Correction
Restore choice first. The government should guarantee the availability of at least one lower blend –E10, or clearly-labelled E0– at a defined density of outlets in every district, priced so that it is a genuine option and not a punitive one, for as long as the pre-2023 fleet remains substantially on the road.
Alongside, it should publish transparent, independently-auditable, long-term test data that closes the lab-versus-road gap, announce a firm and consultative timeline for any move to E25 or E30, and mandate blend labelling at every nozzle so no motorist is fuelled in the dark.
On money, fairness argues for a one-time, means-tested retrofit-and-compensation scheme funded from the forex and excise gains the programme has generated– even the half-subsidy that critics have urged would convert a grievance into goodwill.
The blend itself should be priced to reflect per-kilometre parity, or carry the modest excise rebate NITI Aayog recommended, so that the consumer is not silently taxed for a national objective. On supply, India should diversify aggressively toward second-generation and cellulosic ethanol and toward maize on non-food land, easing the food-water-fiscal squeeze, and accelerate flex-fuel vehicles so that higher blends ride on capable engines rather than captive ones.
Finally, the message must be owned: a single nodal authority for the fuel transition, speaking plainly and early, would have spared the state this month’s avoidable storm.
The paradox at the heart of E20 is that India was right on the destination and careless on the journey. Ours was a nation that saved its forex, paid its farmers and asserted its energy sovereignty-and then contrived to make a genuine victory feel like a betrayal, because it forgot to fund the fairness that a democracy owes the citizens on whom it imposes a reform.
Fund it fully, restore the choice, and the win stands clean. Skip that, and the country will keep pouring a stronger drink into an engine it never bothered to ask.
(This is an opinion piece. Views expressed are the author’s own.)
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