Moisture-absorbing nature of ethanol is contaminating fuel, claim petrol dealers
E20 ethanol-blended petrol raises concerns about water absorption, phase separation, and corrosion in monsoon and coastal conditions.
- Petrol dealers say E20 fuel may become contaminated during monsoons and in coastal areas because ethanol absorbs water.
- Petrol pump owners say existing underground tanks were designed for conventional petrol and may not handle water ingress and condensation in the same way as newer systems.
- Indian Oil Corporation Limited says it has zero tolerance for contamination and is carrying out regular inspections and testing.
Petrol dealers have raised concerns that E20 ethanol-blended petrol may be more prone to contamination during monsoons and in coastal areas because ethanol absorbs water. The issue matters because fuel quality, storage design, and vehicle compatibility affect both consumer safety and the credibility of India’s fuel-blending push.
According to petrol pump owners, existing underground storage tanks were designed for conventional petrol. They argue that water ingress or condensation can trigger phase separation, leaving a water-rich layer that may be dispensed first. Dealers say this can lead to starting trouble, injector malfunction, fuel-pump failure, and in severe cases engine damage.
Dealers also fear corrosion in mild-steel tanks and pipes. They say they bear the loss when contaminated stock is discarded, and they complain that oil companies discourage public warning boards at petrol pumps.
UPSC may frame E20 fuel as a question on energy transition, fuel quality, storage infrastructure, and the trade-off between cleaner fuel mandates and operational reliability. A mains answer can discuss ethanol’s water affinity, phase separation risk, corrosion concerns, quality control in distribution networks, and the need for better tank and pipeline standards.
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