NEW DELHI — India’s ambitious push toward a 20% ethanol-blended fuel, known as E20, is facing significant backlash from vehicle owners and environmentalists who warn of mechanical damage, agricultural strain, and a lack of transparency in the program’s rollout.
Since 2025, E20 has become the default fuel at the vast majority of petrol stations across India, part of a government initiative aimed at reducing reliance on crude oil imports, which cost the nation approximately $137 billion in the 2024-2025 financial year. While the government argues the switch promotes energy independence—or Atmanirbharata—and supports domestic farmers, the reality for many drivers has been marked by increased vehicle maintenance costs and mechanical failures.
Mechanical and Economic Hurdles
Reports of lost mileage, corroded fuel lines, and malfunctioning engines have surfaced nationwide. Ethanol is hygroscopic, meaning it absorbs moisture from the air, which can lead to the corrosion of metal fuel lines and the degradation of plastic and rubber engine components.
According to a report by ICICI Lombard, damages resulting from the use of E20 fuel in older, non-compatible vehicles could potentially be treated as negligence, leaving owners vulnerable to disputed insurance claims.
Despite the government’s initial pitch that ethanol would result in cheaper fuel, consumers are currently paying the same price for E20 as they did for standard petrol, effectively facing a “hidden tax” through reduced mileage and maintenance bills.
Agricultural and Resource Concerns
Beyond the engine, the program is sparking a debate over land and water management. Original government roadmaps aimed for “second-generation” (2G) ethanol produced from agricultural waste. However, the vast majority of India’s current ethanol supply is sourced from water-intensive crops like sugarcane and maize. Producing a single litre of ethanol from sugarcane requires over 3,500 litres of water, often in regions like Maharashtra and Uttar Pradesh that are already grappling with critical water stress.
The diversion of food supplies, including rice stocks from the Food Corporation of India (FCI), to fuel distilleries has also raised concerns regarding food security. In some rural areas, this resource scarcity has exacerbated social crises, such as the phenomenon of “water wives” in drought-stricken regions like Dinghamal, where women are brought into households specifically to manage the arduous task of fetching water.
Transparency and Conflict of Interest
The acceleration of the ethanol mandate from a 2030 target to 2025 has been spearheaded by Minister for Road Transport and Highways Nitin Gadkari. Critics have raised questions regarding a potential conflict of interest, alleging that companies linked to the minister’s family have seen substantial revenue growth following the government’s ethanol push—a claim Gadkari has denied, asserting that his family’s business involvement is minimal and that he does not control tender awards or pricing.
Transparency remains a central point of contention, as the government has declined to publicly disclose safety studies conducted by the Automotive Research Association of India (ARAI), citing them as “confidential trade secrets”.
A Path Forward?
As the government looks toward higher blends such as E85, experts suggest India must adopt a more measured approach, similar to Brazil’s historical model, which emphasised infrastructure development and consumer choice over rapid mandates. For now, consumers are advised to verify their vehicle’s compatibility with E20 fuel, document any repair costs with receipts, and consult their insurance providers regarding policy coverage for ethanol-related issues, particularly in view of the Union government calling E20 an ‘experiment’ in the Supreme Court.
