Energy security, farmers, food, water — and the older car in your garage
Fact-checked to 17 September 2026
The next time you fill your car with petrol, remember that all of it may no longer have begun life in an oilfield.
With E20 petrol, roughly 800 ml of every litre is petroleum petrol and 200 ml is ethanol – alcohol produced from agricultural feedstocks such as sugarcane, maize, rice and damaged grain.
India has moved remarkably fast. Average ethanol blending was only about 1.5% in 2013-14. During November 2025-June 2026 it reached 20%, five years ahead of the original 2030 target.[1]
| At first sight the logic seems irresistible: replace imported oil with something we can grow at home. |
But once we look inside that litre, the story becomes considerably more interesting.
Is ethanol simply cheaper petrol?
Not necessarily.
For the 2025-26 ethanol supply year, oil companies pay around ₹71.86 a litre for maize ethanol, ₹65.61 for sugarcane juice/syrup ethanol, ₹60.32 for ethanol made from FCI rice and ₹57.97 for C-heavy molasses ethanol. GST, transport and handling come on top. [2]
The Petroleum Ministry itself acknowledges that when crude oil is around $70 a barrel, E20 can cost more to produce than unblended petrol. [2]
So E20 should not be understood primarily as a scheme for producing cheap petrol.
Its strongest economic argument is energy security.
India still imports nearly nine-tenths of its crude requirement. Replacing one-fifth of petrol volume with domestically produced ethanol reduces exposure to international crude prices, exchange-rate movements and geopolitical shocks.
The government estimates that the ethanol programme has so far substituted nearly 316 lakh tonnes of crude oil, saved more than ₹1.97 lakh crore in foreign exchange, reduced CO₂ emissions by around 952 lakh tonnes and channelled over ₹1.66 lakh crore to farmers and the domestic ethanol chain. [1] These are government programme estimates rather than household savings, but the scale is substantial.
In other words, ethanol may not always make today’s litre cheaper.
It may make tomorrow’s oil shock less painful.
But what exactly are we growing for the fuel tank?
This is where the E20 debate becomes more difficult.
Early ethanol blending relied heavily on sugarcane. The feedstock has since shifted dramatically towards grain. In 2025-26, maize supplied about 36% of ethanol and FCI rice about 24.6%. The government’s position is that rice is released for ethanol only after Public Distribution System, welfare and buffer-stock requirements have been met. [3]
Yet the question cannot simply be dismissed as “surplus grain being put to good use”. Between June 2025 and June 2026, FCI dispatched about 6.35 million tonnes of rice to ethanol plants. Parliamentary figures reported that the rice was sold under the Open Market Sale Scheme at ₹2,250-2,320 per quintal while FCI’s average acquisition cost was considerably higher. The government says this did not constitute a specific subsidy to ethanol producers because the sales followed the prescribed OMSS pricing policy. [4]
And now there is an international dimension.
The United States has asked India at the WTO to explain how using government-held rice for ethanol fits with the special protection India invokes for public food-security stockholding. The issue is expected to be examined in the WTO Committee on Agriculture. This is a question raised by the US, not a WTO finding that India has violated the rules. [5]
The larger economic issue remains valid regardless of the eventual trade-law argument: food, animal feed and fuel can compete for the same crop.
That competition will matter much more in a drought year than in a bumper-crop year.
And what about water?
The answer depends on what we choose to count.
Inside a modern distillery, only a few litres of process water may be required to produce a litre of ethanol.
But the crop has consumed water long before reaching the distillery.
A 2026 NITI Aayog study cites full water-footprint estimates of roughly 2,860 litres per litre of sugarcane ethanol, more than 4,600 litres for maize ethanol and over 10,700 litres for rice ethanol. [6]
These figures must be treated as indicative rather than universal constants. Rainfall, irrigation, crop yield, geography and the methodology used to allocate water between the crop and its by-products can change the result substantially. Indeed, NITI Aayog’s earlier ethanol roadmap used different assumptions and identified maize as the least water-intensive option among grains. [7]
But one conclusion survives the methodological differences:
changing from sugarcane ethanol to grain ethanol does not automatically make ethanol water-light.
That is particularly important for rice.
It also strengthens the case for second-generation, or 2G, ethanol produced from rice straw, corn cobs and other agricultural residues. The crop was grown anyway; using its residue for fuel does not require another field of foodgrain to be cultivated specifically for ethanol.
Technically and commercially, however, 2G ethanol remains more difficult and expensive to scale.
Is India importing ethanol to achieve E20?
This has produced considerable confusion.
India certainly imports ethanol. Trade statistics show imports of almost 680 million litres of denatured ethyl alcohol in 2024, much of it from the United States. [8]
But that does not mean imported ethanol is being blended into your petrol.
The Commerce Ministry stated unequivocally in August 2026 that ethanol used under India’s Ethanol Blended Petrol programme is sourced from domestic producers and that US ethanol is not being imported for fuel blending. [9]
The imports serve industrial and other permitted uses.
There is nevertheless an interesting economic question for the future. A recent ICRIER policy analysis estimated imported denatured ethanol at about ₹60 a litre before some domestic taxes and transport – within the range of India’s administered ethanol procurement prices – and suggested that imports could provide flexibility during feedstock shortages.
But imported fuel ethanol would change the economics of the programme. We might still replace crude oil and possibly obtain environmental benefits, but part of the foreign-exchange saving and domestic-farmer benefit would disappear.
We would, in effect, be replacing one imported fuel with another.
Will E20 damage an older car?
This is perhaps the consumer’s most immediate concern – and the internet provides plenty of frightening stories.
The evidence calls for more nuance.
The government’s current position is reassuring. It cites extensive ARAI testing, manufacturer service data and millions of older vehicles operating on E20 without evidence of widespread ethanol-induced corrosion, abnormal wear or engine failure. For some vehicles originally designed around E10, the government estimates a fuel-economy reduction of roughly 3-5%. ARAI says E20-compatible vehicles undergo durability testing extending 40,000-60,000 km. [10]
But there is an important historical footnote.
India’s own 2021 NITI Aayog ethanol roadmap, which incorporated automobile-industry inputs, was considerably more cautious. SIAM warned about older vehicles’ material compatibility, possible fuel-system problems and efficiency loss, and explicitly recommended that E10 continue as a “protection grade” alongside E20 during the transition. [7]
Manufacturers themselves illustrate why sweeping statements about “all pre-2023 cars” are risky.
Honda says every Honda car manufactured in India since January 2009 is E20 material-compatible. Toyota says its pre-April-2023 vehicles can accommodate E20 following subsequent validation. Yet some older Hyundai manuals explicitly instructed owners not to use fuel containing more than 10% ethanol because of possible drivability or fuel-system problems. [11]
So 2023 is not a magic dividing line.
The make, model, year, materials used and latest manufacturer guidance matter more.
For an older vehicle, the sensible precautions are simple: check the owner’s manual and the manufacturer’s latest advisory, use reputable fuel stations, maintain the vehicle normally, and have the fuel system inspected if fuel smell, leakage, difficult starting or unexplained drivability problems appear.
Should E10 therefore remain available?
There are two legitimate considerations.
Providing some E10 would give owners of vehicles explicitly designed only for E10 a protection fuel and would follow the recommendation contained in the original NITI/SIAM transition plan.
On the other hand, the government now argues that running E10 and E20 nationwide in parallel would require duplicate storage, transport and dispensing infrastructure across more than one lakh fuel outlets, while current field evidence does not demonstrate widespread E20-related failures. It therefore says there is no proposal to return to E10 or E0. [1]
Between these positions lies a policy choice: universal E10 availability would maximise consumer choice but add substantial logistics cost; limited protection-grade availability at selected outlets could reduce that cost while serving genuinely incompatible legacy vehicles.
The evidence allows the trade-off to be identified more confidently than it allows one universal answer for every vehicle.
Where does E20 go from here?
India has not decided to move the nationwide standard beyond E20. The government says any higher blend would require further technical studies and consultation. E85 is being introduced separately for flex-fuel vehicles designed specifically for it. [1]
International experience also argues against treating 20% as either a ceiling or an automatic stepping stone. Brazil currently uses much higher blends – temporarily E32 in ordinary petrol – after decades of adapting its vehicle fleet and fuel system. Most US petrol, by contrast, remains around E10, with E15 permitted for many newer vehicles and higher blends largely reserved for flex-fuel vehicles.
The real measure of India’s ethanol programme, therefore, is not simply whether the country has reached 20%.
A more revealing scorecard would ask:
How much crude did we avoid importing? How much foreign exchange was saved? What happened to farmers’ incomes? How much foodgrain and water were used? How much carbon was genuinely avoided? And what did the motorist pay per kilometre?
E20 has a credible case as an energy-security policy.
It also carries real trade-offs involving food, water, public stocks, vehicle compatibility and consumer cost.
That is why the story inside one litre of petrol is much bigger than petrol itself.
| The oilfield has met the farm. The challenge now is to make sure that the marriage works for the economy, the farmer, the environment – and the person driving the car. |
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Footnotes and Sources
[1] Ministry of Petroleum & Natural Gas, “Government Highlights Safety, Performance and National Benefits of Ethanol-Blended Petrol”, 23 July 2026.
[2] Ministry of Petroleum & Natural Gas, 2025-26 ethanol procurement prices and explanation of E20 economics, July 2026.
[3] Ministry of Petroleum & Natural Gas, “India’s Ethanol Blended Petrol Programme Balances Food Security, Farmer Welfare and Energy Security”, 31 July 2026.
[4] Rajya Sabha figures on FCI rice supplied to ethanol distilleries, reported by Business Standard, 29 July 2026.
[5] WTO-related questions raised by the United States concerning India’s public rice stocks and ethanol use, Moneycontrol, 16 September 2026.
[6] NITI Aayog, Scenarios Towards Viksit Bharat and Net Zero – Social Implications of Energy Transition, 2026.
[7] NITI Aayog & Ministry of Petroleum and Natural Gas, Roadmap for Ethanol Blending in India 2020-25, June 2021, including water analysis and SIAM recommendations on fuel efficiency, legacy vehicles and E10 protection grade.
[8] World Integrated Trade Solution / UN Comtrade, India’s 2024 imports of denatured ethyl alcohol.
[9] Ministry of Commerce & Industry, “No concession or commitment on import of Ethanol for fuel blending from the United States”, 6 August 2026.
[10] Automotive Research Association of India / Ministry of Heavy Industries, E20 durability and fuel-efficiency testing, 4 July 2026.
[11] Manufacturer guidance from Honda Cars India, Toyota Kirloskar Motor and older Hyundai India owner-manual material concerning E20 compatibility of older models.