India’s journey towards cleaner and domestically produced fuels has often been presented as one of its biggest energy success stories. Over the past decade, the country has steadily increased ethanol blending in petrol, eventually achieving the ambitious E20 target. Today, policymakers are looking beyond E20 and exploring a future where E85 and even E100 fuels become part of India’s transportation ecosystem. Discussions are also underway regarding the use of isobutanol in diesel engines.
The objective is clear: reduce dependence on imported crude oil, save foreign exchange, support farmers and lower carbon emissions.
At first glance, the proposal appears both logical and promising. India imports nearly 85 percent of its crude oil requirements, making the economy vulnerable to global price fluctuations. A domestically produced fuel offers greater energy security and reduced dependence on volatile international markets. However, while the vision is attractive, the path towards it deserves careful scrutiny.
What Exactly Is the Government Proposing?
Contrary to popular perception, the Government of India has not yet announced a mandatory nationwide switch to 100 percent ethanol fuel. What has been proposed is a regulatory framework that would facilitate the use of E85 and E100 fuels and allow automobile manufacturers to introduce vehicles capable of operating on these higher ethanol blends.
This proposal represents the next phase of India’s biofuel mission. Having successfully implemented E20, policymakers believe that further increasing ethanol use can substantially reduce petroleum imports while creating new economic opportunities for farmers.
Yet every policy comes with costs as well as benefits, and in the case of ethanol, those costs deserve equal attention.
The Water Question Nobody Wants to Discuss
Perhaps the biggest concern surrounding ethanol expansion is water. India is already one of the most water-stressed countries in the world, with declining groundwater levels, recurring droughts and growing drinking water shortages in many regions. Yet, the country’s ethanol programme relies heavily on crops such as sugarcane, rice and maize.
Sugarcane and rice are among India’s most water-intensive crops. Critics argue that a growing demand for ethanol could encourage their expanded cultivation, putting further pressure on already stressed water resources.
The concern is particularly serious in the case of rice-based ethanol. Some studies suggest that producing one litre of ethanol from rice can indirectly require nearly 10,000 litres of water when the entire cultivation and processing cycle is considered. While estimates may differ, the broader reality is clear: a significant amount of freshwater is being converted into fuel.
The challenge is not merely the water used in ethanol plants, but the enormous quantity required to cultivate the crops themselves. As more sugarcane and rice are diverted towards fuel production, pressure on groundwater resources is bound to increase.
At a time when many Indian villages still struggle for safe drinking water, a policy aimed at reducing dependence on imported oil should not end up increasing dependence on another rapidly depleting resource—water.
Fuel or Food? The Food Security Debate
Another concern relates to food security. India’s ethanol programme increasingly relies on feedstocks such as sugarcane juice, molasses, maize, broken rice and surplus grain stocks. While supporters argue that surplus agricultural produce should be put to productive use, critics warn that large-scale diversion of food crops towards fuel production may create long-term challenges. The debate becomes more sensitive when viewed alongside concerns regarding food subsidies and welfare support. In a country where millions still depend on affordable food supplied through government programmes, any policy encouraging the use of food crops for fuel must be approached carefully.
As ethanol demand rises, farmers may increasingly favour crops linked to ethanol procurement because of better returns. Over time, this could influence cropping patterns and affect food availability and prices. Food security and fuel security should not become competing priorities. Policymakers must ensure that the pursuit of one does not weaken the other.
What About the Common Vehicle Owner?
For ordinary citizens, the most immediate concern relates to their vehicles. Most vehicles currently on Indian roads were designed either for pure petrol or lower ethanol blends. Although manufacturers have adapted newer models for E20 compatibility, E85 and E100 require specially engineered engines and fuel systems.
Higher ethanol concentrations can affect fuel lines, rubber components and engine calibration if vehicles are not specifically designed for them. Ethanol also contains less energy per litre than conventional petrol, which means mileage may decline unless engines are optimized accordingly.
For middle-class families already burdened by rising transportation costs, these concerns cannot be ignored. Any transition towards higher ethanol blends must ensure that consumers are not forced to bear additional costs through reduced mileage or expensive vehicle modifications.
Why Consumer Choice Must Remain Central
Perhaps the most practical lesson from international experience is that consumers should not be forced into a single fuel option. If India eventually moves towards E85 or E100 fuels, fuel stations should offer multiple choices wherever technically feasible—conventional petrol, E10, E20, E85 and E100.
This would allow consumers to decide based on vehicle compatibility, affordability and fuel efficiency. Different blends are likely to have different prices and performance characteristics. While higher ethanol blends may be cheaper in some situations, they may also provide lower mileage in vehicles not specifically designed for them.
Consumers should therefore have the freedom to choose the fuel that best suits their needs rather than being compelled to adopt a uniform solution.
A successful energy transition is one that earns public confidence, and providing choice at the fuel station is perhaps the simplest way of achieving that.
The Isobutanol Experiment in Diesel
The government is also exploring the possibility of blending isobutanol with diesel.
Unlike petrol, diesel does not readily mix with ethanol. Isobutanol is considered a more suitable alternative because of its chemical compatibility and fuel characteristics. Supporters believe it could reduce dependence on conventional diesel while offering environmental benefits.
However, questions regarding production costs, commercial viability, infrastructure readiness and long-term engine performance remain largely unanswered. Before introducing such fuels on a large scale, comprehensive testing and transparent public discussion are essential.
Lessons from Brazil: Success and Setbacks
Supporters of ethanol often cite Brazil as a model for India. While Brazil remains one of the world’s most successful ethanol economies, its experience also offers important lessons.
In the 1980s, Brazil aggressively promoted ethanol-powered vehicles, but poor sugarcane harvests, droughts, rising sugar prices and policy changes eventually led to fuel shortages. Motorists driving ethanol-only vehicles faced long queues and fuel scarcity, causing public confidence and vehicle sales to decline sharply.
Brazil recovered only after introducing flex-fuel vehicles that could run on petrol, ethanol or a mixture of both. The lesson for India is clear: success depends not only on ambitious targets but also on consumer choice, stable feedstock supplies, infrastructure readiness and technological preparedness.
The Environmental Argument Is More Complex Than It Appears
Ethanol is often promoted as a green fuel, and to some extent that claim is valid. Greater use of biofuels can reduce dependence on fossil fuels and lower certain emissions.
However, environmental sustainability cannot be measured solely by what comes out of a vehicle’s exhaust pipe.
The environmental costs of groundwater extraction, fertilizer use, land conversion and water-intensive crop cultivation must also be considered. If biofuel production contributes to groundwater depletion or ecological stress, the environmental gains may not be as straightforward as they appear.
A truly sustainable fuel policy must evaluate the entire production cycle rather than focusing only on emissions.
A Future Worth Building Carefully
There is no doubt that India needs alternatives to imported crude oil. Ethanol has already helped reduce import dependence and support rural economies.
However, the transition from E20 to E85 or E100 must be guided by careful planning rather than ambition alone. Before moving ahead, policymakers must thoroughly assess water usage, food security, vehicle compatibility, consumer costs and environmental sustainability.
The debate is not about opposing development, but about ensuring that development is sustainable. India’s pursuit of energy independence should not come at the cost of depleted groundwater, strained food systems or additional burdens on consumers. The real challenge is not merely to create an ethanol-powered future, but to create one that is economically viable, environmentally responsible and socially sustainable.
The author is an independent researcher and columnist who writes on public policy, social change, youth affairs and governance. He can be reached at shahidhakla@shahidhakla.com
