IOCL, HPCL petrol samples record over 30% ethanol, alleges Karnataka government; demands action

Karnataka’s tests reported that several petrol samples contained more than the prescribed 20% ethanol. The findings matter because the state says most vehicles are not designed for blends above E20, potentially affecting mileage, components, and consumer costs.

The highest result was 31.2% in an Indian Oil Corporation Limited sample. A Hindustan Petroleum Corporation Limited sample recorded 30.5%. Other results included 27% in HPCL petrol, 26.5% in BPCL Speed, 26.1% in Nayara, and 25.5% in Shell. Samples were collected across seven locations, including Bengaluru and Mangaluru.

The tests were issued by Bengaluru’s NABL-accredited and ISO-certified Shriram Research Institute. The state has sought action against companies found supplying over-blended petrol. It also wants blend percentages displayed at fuel stations and different blends made available so consumers can choose.

E20 means fuel containing up to 20% ethanol blended with petrol. It is a blend limit and compatibility target. Petrol containing more than 20% ethanol is above E20, so it may not suit vehicles, parts, or equipment approved only for E20 fuel.

For example, a sample with 31.2% ethanol contains 11.2 percentage points more ethanol than the prescribed 20% limit. The article reports that E20-compliant vehicles have been manufactured in India from 2023 onward, while the state claims most older vehicles cannot handle higher blends. The distinction is therefore about approved fuel compatibility.

The article does not describe a separate official label for every blend above E20. It reports that Karnataka wants fuel stations to display the actual ethanol percentage and offer different blends. That would help consumers match fuel with their vehicles’ approved limits.

The reported gap is substantial. The highest tested level, 31.2%, exceeds the prescribed 20% limit by 11.2 percentage points. Measured against the limit itself, that is 56% higher. The comparison matters because fuel approval and vehicle design are tied to the ethanol concentration a vehicle is expected to handle.

Karnataka claims that 99% of India’s 35 crore vehicles were not designed to run on blends exceeding E20. That works out to roughly 34.65 crore vehicles if the state’s figures are applied mathematically. The article presents this as a government claim, not as an independently verified vehicle census.

The state also says vehicles sold after April 2023 were certified only for blends up to 20% ethanol. It is seeking action, consumer compensation, blend disclosure, and an E20 spoilage fund. The Union government has been asked to clarify the actual blend reaching consumers.

Fuel above a vehicle’s approved ethanol blend can create compatibility concerns. Karnataka says consumers may face lower mileage and damage to fuel-system components. The concern is especially serious for vehicles designed around E20 or lower blends, because their materials and systems may not be approved for higher ethanol concentrations.

The state specifically listed filters, fuel pumps, injectors, hoses, and seals as potentially affected parts. Reduced mileage would make each kilometre more expensive, even if the pump price stayed unchanged. The article does not provide measured damage rates or prove that every listed problem was caused by over-blending.

Karnataka also questioned whether manufacturers’ warranties cover damage attributed to E20 fuel. It proposed that authorised service centres certify vehicle damage under a time-bound claims process. The state wants compensation from companies found supplying fuel above 20% and a dedicated E20 spoilage fund.

India’s petrol-blending system involves several types of organizations. Oil marketing companies, including IOCL, HPCL, BPCL, Nayara, Shell, and MRPL, supply or market the tested petrol. The article identifies the Central government’s Petroleum and Natural Gas Ministry and Road Transport and Highways Ministry as policy stakeholders.

Testing in this case was performed by Bengaluru’s Shriram Research Institute. The institute is described as NABL-accredited and ISO-certified. The article also says samples were submitted to IOCL and BPCL in-house laboratories, but their reports did not disclose ethanol content, which Karnataka criticized as a transparency issue.

The source does not name a single organization responsible for setting and enforcing all blending standards. It reports that Karnataka demanded action against OMCs, while asking the Government of India to clarify the blend supplied. In general, national fuel policy and vehicle standards involve central authorities, regulators, laboratories, and suppliers, with responsibilities divided among them.

India’s ethanol-blending policy is intended to reduce the amount of petroleum India must import. Replacing part of petrol with domestically sourced ethanol can lower demand for imported oil and help save foreign exchange. The article presents this as the Centre’s stated economic justification for blending.

The basic mechanism is substitution. Ethanol is mixed into petrol, so a portion of the fuel’s energy comes from ethanol rather than petroleum. Greater blending can therefore reduce the petroleum share in each litre. However, the article does not quantify India’s import savings or identify how much ethanol is domestically produced.

Karnataka’s minister questioned whether consumers had received any tangible benefit from the policy. The state instead cited reduced mileage and possible vehicle damage as financial burdens when blends exceed E20. It wants the Union government to explain the actual blend supplied and require pumps to disclose percentages, allowing informed fuel choices.

Ethanol is an alcohol that can be used as a fuel or blended with gasoline. It is commonly made by fermenting sugars or starches and then purifying the resulting alcohol. This manufacturing detail is established general knowledge; the article itself does not explain ethanol production.

Adding ethanol changes a fuel’s chemical properties and energy content. Higher blends can affect mileage and may interact differently with fuel-system materials, seals, hoses, pumps, and injectors. Vehicles must therefore be designed and certified for the blend they use. The article links these compatibility concerns to fuel exceeding E20.

The source does not give technical measurements for emissions or explain a specific emissions mechanism. It reports that E20-compliant vehicles have been manufactured from 2023 onward, while Karnataka claims 99% of vehicles cannot handle blends beyond E20. The dispute now concerns testing, disclosure, consumer costs, warranties, and possible compensation.