Oil Companies Challenge Karnataka’s E20 Petrol Findings

State-run oil marketing companies (OMCs) have rejected the Karnataka government’s claim that petrol sold at several retail outlets in the state contained between 26% and 31.2% ethanol, exceeding the prescribed limit for E20 fuel. The companies have challenged the testing methodology used by state authorities and demanded access to the complete sampling records and laboratory reports.

In a joint statement issued on Saturday, Indian Oil Corporation (IOC), Bharat Petroleum Corporation Limited (BPCL) and Hindustan Petroleum Corporation Limited (HPCL) said the reported findings were not supported by testing conducted under the prescribed statutory and technical procedures.

The dispute centres on the ethanol content of petrol supplied through retail outlets in Karnataka. The state government reported that 11 of 14 tested samples exceeded the 20% ethanol blend specified under the E20 standard, with the highest reported concentration reaching 31.2%.

The oil companies, however, said their own monitoring results showed that fuel supplied across Karnataka and other parts of India complied with the applicable standards. They cited 893 samples collected across 27 states and Union Territories, all of which reportedly fell within the prescribed ethanol content range of 19% to 21%.

The disagreement has raised questions about fuel sampling, laboratory testing and the procedures used to verify Ethanol Blending levels. Both sides’ findings will need to be examined through transparent and technically consistent testing before the conflicting claims can be conclusively resolved.

What did Karnataka’s ethanol testing reveal?

According to a statement released by the Karnataka government, petrol samples collected from retail outlets in seven districts showed ethanol concentrations as high as 31.2%. The reported findings indicated that 11 out of 14 samples contained more ethanol than the 20% blend specified for E20 petrol.

The samples were reportedly collected from fuel stations in the following districts and areas:

• Bengaluru
• Kolar
• Chikkaballapura
• Bengaluru Rural
• Ramanagara
• Mangaluru
• Tumakuru

The outlets covered several fuel suppliers, including Indian Oil, BPCL, HPCL, Nayara Energy, Shell and Mangalore Refinery and Petrochemicals Limited.

The state government’s findings raised concerns because ethanol concentrations significantly above the prescribed blend could indicate a fuel-quality compliance issue. E20 petrol is designed to contain 20% ethanol blended with 80% petrol, subject to the applicable technical specifications and permitted tolerance.

However, the oil companies have questioned whether the samples were collected and tested using the procedures required under the relevant fuel-quality regulations. Their objection is not simply about the reported numbers; it also concerns whether the testing process can be independently verified.

IOC, BPCL and HPCL challenge the testing methodology

In their joint statement, the three public sector oil marketing companies said the claims reported by Karnataka were not supported by testing conducted in accordance with prescribed statutory and technical procedures.

They maintained that E20 petrol supplied through their networks across the country, including Karnataka, conforms to IS 17021, the Bureau of Indian Standards specification for ethanol-blended motor gasoline.

The companies said the collection and testing of petrol, officially referred to as motor spirit, and diesel, known as high-speed diesel, are governed by procedures under the Essential Commodities Act and the Marketing Discipline Guidelines.

These rules establish requirements for checking Fuel Quality at retail outlets and help ensure that samples are collected, handled and tested in a manner that allows the results to be verified.

According to the OMCs, representatives of the companies were not present when the samples cited by the Karnataka government were collected. They argued that this prevented them from participating in the sampling process and independently documenting the conditions under which the fuel was obtained.

The companies also said they had not received the corresponding retention samples, complete outlet-wise details or laboratory reports, despite requesting the information through the State Level Coordinator.

Retention samples are important in fuel-quality disputes because they provide material that can be tested again if one party challenges the original findings. Without access to corresponding samples and documentation, the companies say they cannot independently reproduce or verify the reported results.

Why the oil companies want laboratory reports and retained samples

The oil marketing companies have raised several concerns about the evidence supporting Karnataka’s reported ethanol levels. One of their main objections relates to the use of certificates issued by a third-party laboratory.

According to the joint statement, the reported findings relied on certificates from a laboratory rather than testing conducted at a laboratory specified under the relevant control order.

The companies argued that the certificates did not contain all the technical information needed to independently assess how the ethanol concentrations had been determined. They also said the absence of complete testing records prevented them and the concerned fuel dealers from seeking verification or retesting.

The companies have specifically requested the following information from the Karnataka government:

• Complete sampling documentation: Records showing how and when each fuel sample was collected.
• Outlet-wise laboratory reports: Individual results identifying the retail outlet associated with each sample.
• Testing methodology: Details of the technical procedure used to determine ethanol concentrations.
• Retention samples: Access to corresponding samples so that independent tests can be conducted.
• Independent verification: Permission to test the samples at an authorised laboratory using the prescribed referee method.

The OMCs have also requested that any independent testing take place in the presence of representatives from both the state government and the oil companies.

Such an arrangement would allow the parties to observe the testing process and compare results obtained through an agreed technical procedure. It could also help determine whether the differences between the state government’s findings and the companies’ monitoring data resulted from sampling, testing or actual variations in fuel composition.

What is E20 petrol and why does ethanol blending matter?

E20 petrol is motor fuel containing a blend of approximately 20% ethanol and 80% petrol. Ethanol is an alcohol-based fuel commonly produced from agricultural materials such as sugarcane, maize and other biomass feedstocks.

India has expanded ethanol blending as part of its efforts to reduce dependence on imported crude oil, diversify fuel sources and create additional demand for agricultural products. Ethanol can be blended with petrol and used in compatible vehicles, subject to applicable fuel standards and manufacturer requirements.

The national ethanol blending programme has become an important part of India’s energy policy. The government has promoted higher blending levels to reduce the amount of conventional petrol required for transport and support the domestic biofuel industry.

The E20 specification provides a technical framework for the quality of ethanol-blended petrol. It establishes requirements that fuel supplied to consumers must meet, including the permitted ethanol content and other fuel characteristics.

Maintaining the correct blend is important because vehicles are designed and calibrated according to particular fuel specifications. Higher ethanol concentrations can affect fuel properties, including energy content and material compatibility, depending on the vehicle’s design and the fuel system.

However, the actual impact of a particular ethanol concentration depends on several factors, including the vehicle model, engine design, fuel-system materials and the relevant technical standards. A reported concentration above the specified blend should therefore be investigated through reliable testing rather than treated as proof of a particular vehicle problem.

What do the oil companies’ 893 samples show?

To support their position, IOC, BPCL and HPCL cited monitoring conducted by the Centre for High Technology (CHT), an organisation associated with the Ministry of Petroleum and Natural Gas.

According to the joint statement, CHT has been continuously monitoring ethanol blending and fuel quality across retail outlets. The companies referred to 893 E20 samples collected from their depots and retail outlets across 27 states and Union Territories.

The samples came from all three public sector oil marketing companies. The distribution was as follows:

The companies said all 893 samples contained ethanol within the prescribed range of 19% to 21%.

They also highlighted results from Karnataka, where 56 samples from different locations and all three OMCs reportedly showed ethanol concentrations between 19% and 20%. The average ethanol content across those samples was 19.30%.

According to the companies, these results demonstrate that ethanol blending at their retail outlets is being monitored and maintained within the applicable specifications.

However, the two sets of findings cannot be directly compared without examining the sampling locations, collection dates, testing procedures and laboratory documentation. The state government’s reported results covered 14 samples from selected outlets, while the OMCs cited a broader monitoring exercise involving 893 samples across multiple states and Union Territories.

The 56 Karnataka samples cited by the companies are also not necessarily identical to the 14 samples collected by the state government. Establishing whether the same outlets and fuel batches were tested would be important in resolving the disagreement.

Why independent verification is important

The conflicting results have made independent verification central to the dispute. The Karnataka government has reported ethanol levels significantly above the E20 specification at several outlets, while the oil companies maintain that their monitoring records show compliance.

Neither set of figures should automatically be treated as conclusive without examining the technical evidence behind it. Fuel testing depends on proper sample collection, storage, handling, laboratory equipment and the use of an appropriate analytical method.

If samples are not collected under comparable conditions, differences in results may be difficult to interpret. Similarly, laboratory certificates that do not provide sufficient technical details may limit the ability of other parties to reproduce the findings.

A jointly observed testing exercise using retained samples and an authorised laboratory could help establish whether the reported ethanol concentrations are accurate. It would also give the state government and the companies an opportunity to examine the same material under a common procedure.

For consumers, the issue is particularly important because fuel-quality standards are intended to ensure that petrol sold at retail outlets meets the required specifications. Clear testing procedures and transparent reporting help protect consumer interests and maintain confidence in the fuel supply system.

What happens next in the Karnataka ethanol dispute?

The three oil marketing companies have asked the Karnataka government to share its complete sampling documentation, outlet-wise laboratory reports and details of the testing methodology used to calculate the reported ethanol levels.

They have also requested access to the corresponding samples for independent testing at an authorised laboratory using the prescribed referee method. The companies want representatives of both the state government and the OMCs to be present during the exercise.

The next stage will depend on whether the requested documents and samples are made available and whether the parties agree on a process for independent verification.

If further testing confirms that petrol at particular outlets contained ethanol significantly above the permitted range, authorities may need to investigate the supply chain and determine where the deviation occurred. That could involve examining fuel depots, transportation, storage and retail-level handling.

If the independent results differ from Karnataka’s reported figures, investigators would need to examine the original sampling and testing procedures to understand the discrepancy.

For now, the dispute remains unresolved. The Karnataka government has reported that 11 of 14 samples exceeded the E20 limit, while IOC, BPCL and HPCL have cited monitoring results showing compliance across their networks.

The outcome of an independent, technically sound testing exercise will be important in determining whether the reported high ethanol concentrations reflect an actual fuel-quality problem or differences in the methods used to collect and analyse the samples.