India's state-owned Oil Marketing Companies (OMCs) have vehemently refuted claims by the Karnataka government regarding excessive ethanol content in E20 petrol, asserting that comprehensive testing confirms adherence to national quality standards. This dispute underscores critical issues in fuel quality assurance, regulatory compliance, and the broader economic and environmental objectives of India's ambitious ethanol blending program.
India’s state-owned Oil Marketing Companies (OMCs) have strongly pushed back against allegations from the Karnataka government asserting that petrol sold in the state contains significantly higher ethanol concentrations than the mandated E20 blend. In a comprehensive rebuttal, the OMCs – Indian Oil Corporation Limited (IOCL), Bharat Petroleum Corporation Limited (BPCL), and Hindustan Petroleum Corporation Limited (HPCL) – declared that extensive quality checks across 27 states and Union Territories, including Karnataka, confirm strict adherence to prescribed ethanol blending standards. This high-stakes dispute positions fuel quality control, consumer confidence, and the integrity of India’s national energy strategy at its core.
Genesis of the Dispute: Karnataka’s Allegations and OMC’s Rebuttal
The controversy ignited following a press release from the Department of Food, Civil Supplies, Consumer Affairs and Legal Metrology, Government of Karnataka, which claimed that certain retail outlets in the state were dispensing petrol with ethanol content ranging between 26% and 31%. These figures significantly exceed India’s E20 mandate, which specifies an ethanol blend of 20% in motor gasoline, a critical component of the nation’s strategy for energy security and environmental sustainability.
The Ministry of Petroleum and Natural Gas promptly took note of these claims. The three major OMCs, however, have categorically stated that these reported findings are not substantiated by testing conducted in accordance with established statutory and technical procedures. They assert that E20 petrol supplied across India, including within Karnataka, consistently conforms to IS 17021, the Bureau of Indian Standards specification for ethanol-blended motor gasoline.
Operational Breakdown: Questionable Methodology vs. Verified Compliance
Concerns Over Karnataka’s Sampling and Testing Methodology
The OMCs have raised significant concerns regarding the sampling procedure and testing methodology adopted for the exercises cited in the Karnataka report. India’s regulatory framework, governed by the Motor Spirit and High Speed Diesel (Regulation of Supply, Distribution and Prevention of Malpractices) Order, 2005, and the Marketing Discipline Guidelines (MDG) 2024, prescribes a rigorous, multi-step procedure for fuel sampling and testing:
- Six one-litre samples must be drawn for each test.
- Two samples are handed to the dealer against acknowledgement.
- Two samples are retained by the oil company or department.
- Two samples are sent to a laboratory specified under Schedule III of the Control Order or notified in the Official Gazette.
- Sample labels must be jointly signed by all parties.
- Test results must be communicated to the dealer and the oil company within a prescribed timeframe.
The OMCs contend that the specific exercises cited by Karnataka deviated from these mandatory protocols. They reported a lack of OMC representative participation during sample collection, non-receipt of corresponding retention samples, incomplete outlet-wise details, and a failure to provide official laboratory reports. Crucially, the reported findings relied on certificates issued by a third-party laboratory, rather than one specified under the Control Order, with insufficient technical details to independently verify the stated ethanol content. The absence of proper documentation and counterpart samples also denied OMCs and dealers the opportunity for verification or retesting.
Technical Discrepancies in Ethanol Measurement
A preliminary technical assessment by the OMCs further highlighted critical flaws in the ethanol testing methodology cited in the Karnataka certificates. Under IS 17021:2018 (Amendment No. 3, August 2025), ethanol content in E20 fuel must be determined via specific, prescribed methods:
- Fourier Transform Infrared Spectroscopy (FTIR) under ASTM D5845.
- Water extraction under Annex C.
- Gas Chromatography under ASTM D4815/D6839.
If Gas Chromatography is employed, the sample must first be diluted in a 1:1 ratio with oxygenate-free petrol, and the result then corrected against an E10 certified reference material. The Karnataka certificates, however, merely stated “Ethanol % by Gas Chromatography” without specifying the applicable standard, dilution procedure, or reference material. Without these crucial details, the reported 26-31% ethanol figures cannot be independently validated against the prescribed methodology.
Adding to the technical concerns, the reported density readings in the Karnataka certificates indicated densities ranging from 0.742 to 0.749 g/cc for samples claimed to contain 26-31% ethanol. This is notably lower than the 0.752–0.760 g/cc recorded for E20 samples tested by OMCs. Given that ethanol has a higher density than petrol, a higher ethanol proportion would logically result in an increased blend density. This discrepancy further underscores the need for stringent adherence to prescribed testing methodologies and verification against appropriate reference samples.
OMC and CHT Quality Monitoring Confirms Compliance
In contrast to Karnataka’s claims, the Centre for High Technology (CHT), under the Ministry of Petroleum and Natural Gas, along with the OMCs’ Quality Coordination Cell (QCC), has maintained continuous oversight of ethanol blending and fuel quality across retail outlets. As part of this rigorous monitoring:
- 893 E20 samples were drawn from IOCL (330), BPCL (280), and HPCL (283) depots and retail outlets across 27 States and Union Territories.
- These samples were tested for ethanol content as per IS 17021, Annex C, at refinery and OMC quality-control laboratories.
- All 893 samples were found to be within the prescribed ethanol content range of 19–21%.
Significantly, all 56 samples tested in Karnataka, collected from various locations and representing all three OMCs, also conformed to the prescribed specifications, recording ethanol content between 19% and 20%, with an average of 19.30%. These findings robustly demonstrate that ethanol blending at OMC retail outlets is meticulously monitored and controlled within national specifications, contradicting the substantially higher levels reported by Karnataka.
Multi-Stakeholder Perspectives and Official Statements
The three public sector Oil Marketing Companies have clarified that the claims, as reported by the Department of Food, Civil Supplies, Consumer Affairs and Legal Metrology, Government of Karnataka, are not supported by testing conducted in accordance with the prescribed statutory and technical procedures. E20 petrol supplied across the country, including Karnataka, conforms to IS 17021, the Bureau of Indian Standards specification for ethanol-blended motor gasoline.
This statement from the OMCs emphasizes their adherence to national standards and highlights the procedural irregularities in the Karnataka report. The Ministry of Petroleum and Natural Gas has also reiterated its commitment to consumer protection and regulatory compliance.
The Ministry of Petroleum and Natural Gas reiterates its commitment to ensuring the quality of petroleum products supplied to consumers, regulatory compliance and consumer protection, supported by established quality-assurance and monitoring mechanisms across the nationwide supply and distribution networks of OMCs.
Socio-Economic, Industry & Policy Implications
Challenging Consumer Impact Claims
The Karnataka press release also made significant claims regarding consumer impact, estimating an annual mileage loss of approximately ₹62,000 crore and vehicle-repair costs of approximately ₹39,000 crore, aggregating to around ₹1.01 lakh crore. The OMCs and the Ministry have strongly challenged these figures, calling for a careful examination against established technical evidence.
Over 30 crore two-wheelers and 4 crore four-wheelers have been operating on E20 fuel for more than three years in India, with over 6 crore people refueling daily. If widespread issues with E20 fuel quality existed, a significant incidence of vehicle breakdowns would be expected across this massive vehicle base, which has not been reported. This extensive real-world usage serves as a crucial counterpoint to the unsubstantiated claims.
Furthermore, the performance and mileage implications of E20 have been thoroughly examined by the Inter-Ministerial Committee and through studies involving IOCL, the Automotive Research Association of India (ARAI), and the Society of Indian Automobile Manufacturers (SIAM). These studies indicate that vehicles calibrated for E20 may experience a mileage reduction of approximately 1–2%, while other vehicles might see reductions of 3–6%, depending on vehicle category and calibration. Therefore, applying a blanket assumption of 10% mileage loss across the entire vehicle population to extrapolate a national consumer loss figure of ₹62,000 crore lacks scientific basis. Similarly, the ₹39,000 crore vehicle-repair estimate requires transparent substantiation through actual vehicle-performance data, materials compatibility studies, and documented repair costs, rather than relying on broad assumptions.
Broader Benefits of the Ethanol Blending Programme
India’s ethanol-blending journey, spanning over two decades since its pilot program in 2001, is a cornerstone of the nation’s energy policy. Guided by the National Policy on Biofuels, 2018, and the NITI Aayog Roadmap for Ethanol Blending in India by 2025, the Ethanol Blended Petrol (EBP) Programme is vital for:
- Reducing dependence on imported crude oil, enhancing energy security.
- Strengthening domestic agricultural value chains and supporting farmers.
- Advancing environmental sustainability through reduced carbon emissions.
The quantifiable outcomes of the EBP programme since ESY 2014-15 are substantial:
- Foreign-exchange savings exceeding ₹1.97 lakh crore.
- Substitution of approximately 316 lakh metric tonnes of crude oil.
- Reduction of approximately 952 lakh metric tonnes of CO₂ emissions.
- Transfer of more than ₹1.66 lakh crore to farmers.
These measurable economic, environmental, and agricultural benefits underscore the program’s strategic importance. The OMCs also clarified that the suggestion of a commercial incentive for excess blending is misplaced, as ethanol procurement represents a significant cost, and blending beyond prescribed targets would only increase their operational expenses.
Strategic Roadmap: Towards Transparency and Joint Verification
In light of the concerns raised, the OMCs have formally requested the Government of Karnataka to share complete sampling documentation, outlet-wise laboratory reports, and comprehensive details of the test methodology adopted for their reported findings. They have also sought access to the counterpart samples for independent testing at an authorised laboratory, utilizing the prescribed referee method, and crucially, in the presence of representatives from both the State Government and the OMCs.
The OMCs have affirmed their commitment to cooperating with the State Government and other competent authorities in conducting joint sampling and testing strictly in accordance with the Control Order and the MDG 2024. Any deviation from quality standards established through these prescribed, transparent procedures will be dealt with rigorously under applicable guidelines. The Ministry of Petroleum and Natural Gas continues to emphasize its dedication to ensuring the quality of petroleum products, regulatory adherence, and consumer protection across the nationwide supply and distribution networks.
Source: Press Information Bureau (PIB)
