South India faces controversy as Karnataka claims petrol has excess ethanol above limit - India Today - India Today

State authorities in Karnataka announced that recent laboratory tests indicated the presence of ethanol in petrol at concentrations exceeding the maximum allowed by national regulations. The standard ethanol blend for gasoline in India is set at 10 percent, a figure intended to reduce emissions while maintaining engine efficiency. According to the Karnataka fuel department, samples taken from several fuel stations in the southern region showed ethanol content that was higher than this threshold, prompting questions about compliance with the Petroleum and Natural Gas Regulatory Board’s (PNGRB) guidelines.

The controversy has drawn attention from automobile manufacturers, consumer groups, and environmental agencies. Excess ethanol can alter the combustion characteristics of petrol, potentially leading to reduced fuel economy, engine knocking, and increased wear on engine components. While higher ethanol blends are promoted as a step toward greener fuel, they must be carefully managed to avoid adverse effects on older vehicles that are not designed for such mixtures. The Karnataka government has called for a thorough investigation and has urged the PNGRB to verify the findings and take corrective action if necessary.

For drivers across South India, the issue highlights the importance of transparent fuel quality monitoring and the need for robust enforcement mechanisms. If the allegations are confirmed, it could lead to revisions in the supply chain, stricter testing protocols at refineries, and possible penalties for non‑compliant fuel distributors. The situation also serves as a reminder to consumers to stay informed about fuel standards and to report any unusual vehicle behavior that may be linked to fuel quality concerns.