The Ministry of Petroleum and Natural Gas has categorically dismissed social media rumors claiming that ethanol-blended petrol is causing ants to swarm vehicle fuel tanks. Clarifying the government's stance during a press briefing on Tuesday, officials stated that the integration of ethanol into petrol is a strictly scientific process subjected to continuous quality monitoring.

The clarification comes in the wake of a viral video showing ants crawling near a vehicle's fuel tank, sparking speculation that the fuel contains raw sugarcane juice.

Fuel-Grade Ethanol Contains No Sugar, Says Ministry

"Fuel-grade ethanol contains absolutely no sugar," the ministry stated, adding that malicious actors are recycling old, unverified videos and photographs to trigger panic among motorists.

Authorities confirmed that there have been zero validated reports of engine damage linked to the use of E20 petrol across the country. Addressing separate consumer anxieties regarding vehicle insurance validity, the Central government explicitly stated that using E20 fuel (petrol blended with 20% ethanol) has absolutely no bearing on insurance policies, a consensus reached after thorough consultations with industry stakeholders.

Global Precedent and Rs 1.4 Lakh Crore Savings

To counter domestic skepticism, officials pointed out that ethanol-blended fuels have been successfully deployed for years in major global economies. Brazil has long relied on E27 blends, while the United States and Japan maintain extensive blending programs.

The government highlighted three primary macroeconomic breakthroughs driven by India's domestic ethanol program:

• Foreign Exchange Savings: The reduction in crude oil imports has saved the national exchequer over ₹1.4 lakh crore in foreign exchange to date.

• Rural Economy Boost: Surging demand for agricultural feedstock used in ethanol production has provided a direct price support mechanism for farmers, strengthening rural liquidity.

• Energy Security & Decarbonization: Increased blending is actively reducing the country's carbon footprint while insulating it against global oil volatility.

Understanding the Chemistry and Generation of Ethanol

Technically an alcohol derived from the fermentation of starch and sugars, ethanol serves as an eco-friendly fuel additive. While sugarcane juice remains a primary source, it is increasingly produced from agricultural waste, damaged food grains, maize, and rotten potatoes.

Production is categorized across distinct phases:

1. First Generation (1G): Derived directly from sugarcane juice, sugar beet, damaged potatoes, sweet sorghum, and maize.

2. Second Generation (2G): Sourced from cellulosic and lignocellulosic biomass like rice straw, wheat straw, corncobs, bamboo, and woody biomass.

3. Third Generation (3G): Currently under development, focusing on advanced biofuels derived from algae.

The Push for Flex-Fuel and E85

The government's push for alternative biofuels hit a major milestone just a fortnight ago with the introduction of E85 fuel for flex-fuel vehicles. Retailing at ₹82.12 per liter in New Delhi, E85—which features a blend of up to 85% ethanol and 15% petrol—is significantly cheaper than regular E20 petrol, undercutting it by a flat ₹20 per liter.

However, the ministry cautioned that E85 cannot be pumped into standard petrol engines. It requires dedicated flex-fuel technology capable of recalibrating for high-ethanol concentration.

Among the compliant fleet ready for the transition is the Maruti Suzuki WagonR Flex-Fuel, India’s first mass-market car engineered to run on blends up to E100. In the two-wheeler segment, Hero MotoCorp is set to retail its flex-fuel iterations of the Splendor+ and HF Deluxe in selected regions of Delhi and Maharashtra starting July 2026, while the Suzuki Gixxer SF also stands certified for high-ethanol compatibility.

This infrastructure push coincides with Union Road Transport Minister Nitin Gadkari’s recent policy announcement in Nagpur, where the government gave its formal nod to 100% pure ethanol (E100) as an official fuel type.

Despite official assurances, local mechanics in transit hubs like Delhi report a contrasting narrative on the ground. Some independent garage owners claim an uptick in fuel-sensor failures and moisture-linked corrosion inside older fuel tanks over the last two years, attributing it to the hygroscopic nature of ethanol. Government agencies, however, maintain that standardized vehicle manufacturing compliant with E20 norms completely mitigates these risks.

Experts Split Over Water Footprint of India's Ethanol Push

Debate intensifies as study claims massive water use for biofuel production amid deepening scarcity concerns

A fresh study highlighting the heavy water requirement for ethanol production has triggered a sharp debate on whether India's ambitious ethanol blending programme is sustainable in a country already grappling with severe water stress. While the government celebrates achieving the E20 blending target ahead of schedule, questions are mounting over the long-term impact on groundwater and drinking water supplies.

The controversy erupted after reports, drawing on government-linked data, suggested that producing one litre of ethanol from rice could consume around 10,790 litres of water when accounting for the full cultivation cycle. This figure has raised alarms among environmental experts and water conservationists, especially as many ethanol plants are located in already water-stressed regions.

Water Use Claims Under Scanner

Industry bodies have pushed back strongly against the narrative. The Grain Ethanol Manufacturers Association (GEMA) described the 10,000-litre figure as a misinterpretation that includes rainfall and crop evapotranspiration rather than direct industrial consumption. 

"Calling ethanol a water guzzler is simply incorrect," said C.K. Jain, President of GEMA. "Modern ethanol plants in India consume only about 3-5 litres of process water per litre of ethanol." He emphasised that plants are becoming more efficient with recycling and zero-liquid discharge systems.

However, critics argue that even if factory usage is low, the broader water footprint of feedstock crops cannot be ignored. According to data shared by Food Secretary Sanjeev Chopra earlier, rice-based ethanol stands at roughly 10,790 litres per litre, compared to about 3,630 litres for sugarcane and 4,670 litres for maize.

India's Water Crisis: A Stark Reality

India's per capita water availability has already fallen to 1,486 cubic metres in 2021, placing it in the water-stressed category. Projections indicate it could drop to around 1,140 cubic metres by 2050. NITI Aayog has warned that 21 major cities, including Delhi, Bengaluru, and Chennai, risk groundwater depletion.

Agriculture consumes nearly 80% of the country's freshwater, with rice and sugarcane being particularly thirsty crops. In this context, diverting surplus rice or expanding grain-based production for fuel has sparked concerns about competing demands between food, fuel, and drinking water.

Ethanol Programme: Milestones and Momentum

Despite the debate, the ethanol blending programme remains a flagship initiative. India achieved the 20% ethanol blending (E20) target in mid-2025, well ahead of the original 2030 deadline. Total production capacity has crossed 1,900 crore litres, with plants concentrated in Uttar Pradesh, Maharashtra, Karnataka, and Bihar.

The programme uses a mix of sugarcane molasses, juice, broken rice from FCI stocks, and increasingly maize. Officials highlight multiple benefits: reduced oil import bills, lower carbon emissions, and higher farmer incomes. Uttar Pradesh leads production with around 250 crore litres annually.

Shift Towards Maize

In response to sustainability concerns, the government is promoting maize as a less water-intensive alternative. Maize is often rain-fed in many regions and requires comparatively lower irrigation than rice. Industry sources indicate a gradual diversification away from excessive reliance on rice.

Ground Concerns and Expert Views

Farmers and local officials in states like Punjab and Haryana, where groundwater levels have plummeted due to paddy cultivation, express mixed feelings. While ethanol demand provides a market for surplus or damaged grains, long-term water sustainability worries persist.

Water experts point out that virtual water embedded in crops matters in a country facing erratic monsoons and climate change impacts. Some suggest stricter water audits for new distilleries and incentives for drought-resistant feedstocks.

Others counter that ethanol production utilises existing agricultural surpluses and that stopping the programme would not magically restore groundwater—better irrigation practices, crop diversification, and wastewater recycling are needed regardless.

Balancing Energy Security and Water Security

As India eyes higher blends in the coming years, the challenge lies in aligning energy goals with water conservation. The Ministry of Petroleum and Natural Gas, along with NITI Aayog, is understood to be monitoring feedstock patterns closely.

Officials maintain that the programme is designed to use surplus grains without compromising food security, while technological upgrades in distilleries minimise industrial water use.

The coming months are likely to see more detailed policy guidelines on sustainable feedstock selection and mandatory water efficiency norms for ethanol units. For now, the debate underscores a larger truth: in a water-stressed nation, every step towards green energy must be weighed against its hidden costs.