The industry organization Siam raised concerns regarding fuel quality issues and vehicle safety, noting an increase in malfunctions of components such as fuel injectors, fuel pumps, EGR valves, and other parts that come into contact with fuel or exhaust gases.
In a letter addressed to the Petroleum Secretary Niradju Mittal on July 28, Siam indicated that investigations into damaged parts point to corrosion and wear caused by the high chloride content in E20 fuel. According to the document, fuel samples from vehicles showed chloride levels up to 500 parts per million (ppm), whereas samples from retail outlets showed contamination up to 350 ppm.
Furthermore, the organization drew attention to an unusually high moisture level in some fuel samples, warning that excess water could lead to phase separation—a state where ethanol and gasoline separate due to water contamination, making immediate vehicle operation after refueling impossible.
Siam's demand to the government was clear: the organization strongly urged the Ministry of Petroleum and Natural Gas (MoPNG) to introduce mandatory chloride limits in fuel specifications through the Bureau of Indian Standards (BIS), instruct oil marketing companies to determine the source of contamination, and strengthen fuel quality control.
However, less than a week later, Siam's public stance changed. On Tuesday evening, after the letter became public and MoPNG issued a clarification defending the country's E20 program, Siam stated that the figures presented require 'confirmation through the collection of detailed data from various regions of the country and subsequent comprehensive consultation with our OEM members.'
The organization characterized this correspondence as part of 'routine and ongoing technical discussions' between the industry, oil companies, and government bodies, assured consumers that 'there is no cause for concern,' and officially withdrew its initial statement.
The contrast between the two documents is evident: in the first, Siam cited specific contamination levels, linking them to operational failures, and demanded immediate regulatory intervention; in the second, it stated that these figures needed further verification before any conclusions were drawn.
The reasons for the industry's change in public position remain unclear. Nevertheless, these events established that ethanol-blended gasoline has become one of the most politically and commercially sensitive topics in the country.
For the Union government, ethanol blending is a key element of India's energy security strategy aimed at reducing crude oil imports, saving foreign exchange, and creating an additional market for agricultural produce. For automakers, the priority is ensuring vehicle longevity following years of redesigning engines and components for compatibility with E20 fuel.
However, for car owners, the concerns are more immediate: many consumers complain on social media and other public forums about reduced fuel efficiency after switching to E20 gasoline, and some report maintenance issues.
These complaints have become an important part of the public discourse, although the government and the automotive industry insist that E20 does not cause widespread engine damage. Minister of Road Transport and Highways Nitin Gadkari recently stated in Parliament that fuel efficiency may decrease by 2–6 percent, depending on the category and age of the vehicle, while testing has shown no engine failures related to the use of E20.
This explains why what started as a technical discussion quickly turned into a broader political debate. Arvind Kejriwal, national coordinator of the Aam Aadmi Party and former Mayor of Delhi, became the loudest political opponent of E20 implementation. Over the past week, he demanded that consumers be given a choice between E20 and pure gasoline, arguing that drivers should not be forced to use a fuel blend if they are concerned about vehicle compatibility or fuel efficiency. His party has also organized protests on this issue.
The discussion took on an institutional character when the Punjab Assembly passed a resolution on Tuesday calling on the Centre to suspend the mandatory implementation of E20 for vehicles not certified to run on this blend.
The geography of the dispute is also telling. The loudest political opposition comes from Punjab, while states that provide a significant portion of India's ethanol production—such as Uttar Pradesh, Maharashtra, Karnataka, Bihar, and Gujarat—largely avoid this discussion. These states host a large share of the country's distilleries, which produce ethanol from sugarcane-based raw materials like molasses, sugar syrup, and sugarcane juice, as well as from grain crops, including corn and surplus or damaged grains.
For them, ethanol has become an important rural industry, providing an additional income source for sugar mills, grain processors, and farmers. Opposing positions were evident on Tuesday: while Punjab opposed E20 implementation, Union Agriculture Minister Shivraj Singh Chouhan met with farmer organizations supporting the ethanol blending program.
According to the Ministry of Agriculture's statement, farmer representatives stated that they support ethanol and want the real benefits of the program to reach farmers, not just companies or intermediaries. Chouhan noted that the Centre's thought is clear: the benefits of the ethanol program must reach the entire chain, from farm to fuel tank, but the largest share must go to the interests of the farmers.
To understand how a technical letter triggered a national political debate, it is necessary to examine how quickly policy shifted from a modest pilot project to a nationwide program. The Ethanol Blending Programme (EBP) began as a pilot project in 2001 and was officially launched in 2004 with the aim of blending 5 percent ethanol with gasoline. Progress remained slow for several years due to limited ethanol production, uncertainty in pricing policy, and difficulties faced by oil marketing companies in ensuring sufficient supplies.
The program gained momentum after 2014 when the Centre introduced guaranteed procurement prices for ethanol and expanded the list of approved raw materials beyond molasses to include sugar syrup, sugarcane juice, corn, and surplus or damaged grains. A turning point was 2021, when an inter-ministerial committee chaired by NITI Aayog prepared a roadmap for the transition to E20. The committee included representatives from the ministries of petroleum, transport, agriculture, and food, as well as Siam, oil marketing companies, testing agencies, and automakers.
The initial goal of achieving 20 percent ethanol blending by 2030 was subsequently accelerated to the Ethanol Supply Year (ESY) 2025-26. This decision followed the NITI Aayog roadmap, which concluded that ethanol production capacity and vehicle readiness were developing faster than initially assumed. The implementation then accelerated: the average ethanol blend increased from 8.1 percent in ESY 2020-21 to 10 percent in 2021-22, 12.1 percent in 2022-23, 14.6 percent in 2023-24, and 19.2 percent in 2024-25, before reaching the target of 20 percent in ESY 2025-26, five years ahead of schedule.
During the same period, ethanol purchases by oil marketing companies grew from approximately 38 crore liters in ESY 2013-14 to over 1200 crore liters in ESY 2025-26, and installed production capacity expanded to approximately 2000 crore liters annually. Shortly after reaching the E20 target in 2026, government officials began discussing the technical feasibility of higher ethanol blends, such as E25 and E30. However, the Centre recently clarified in Parliament that no decision has been made to mandate blending above E20, and any future steps will follow technical studies and consultations with stakeholders.
Siam's letter of July 28 did not question the ethanol blending program itself. In fact, it affirmed the automotive industry's support for the government's biofuel policy and mentioned ongoing discussions about future programs related to higher ethanol blends. Its central argument was that fuel quality control must match higher blending levels. The letter stated that fuel contamination could create a 'misconception about E20 fuel in the minds of customers' and called on the government to resolve this issue immediately. It was also noted that Siam members had raised the issue of chlorides before the BIS committee for over two years, but mandatory limits had not yet been included in fuel specifications.
India's journey in ethanol has reached a point where it is no longer just a fuel policy. It is now linked to farmers' incomes, the sugar industry economy, energy security, automotive technology, and vehicle owner experience. Last week's events highlight the challenge facing policymakers: managing a transition involving numerous stakeholders, each with their own vested interests.
