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India’s ethanol blending program reached a milestone with 20% ethanol in petrol, enhancing energy security and supporting farmers. While E20 fuel may cause a slight dip in vehicle mileage, it offers significant environmental and economic advantages.

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India is at a mere juncture in its energy destination with the widespread use of ethanol-blended fuel, particularly the E20 mixture. As per the statement released by the Union Ministry of Petroleum and Natural Gas, the citizens immediately raised concern about the drop in mileage and performance of their vehicles.
As the nation pushes toward sustainable and greener alternatives, concerns and rumors regarding vehicle compatibility and safety have taken center stage. This is due to the use of ethanol-blended fuels like E10 and E20. Here in this article, we try to unpack the facts and fears surrounding ethanol fuel.Here’s everything you need to know.
Also Read: India’s PM E-DRIVE Scheme Unveils Game-Changer Incentive Shake-Up for E-Vehicles and E-3Ws
Ethanol is a type of alcohol that is derived from the extraction of natural resources like the molasses or husk of crops such as corn, sugarcane, wheat, and barley. These ethanol fuels have been available since 2022, with 90% petrol mixed with 10% ethanol, and vehicles manufactured after 2020 are BS6 emission compliant and designed to run on biofuel.
Due to this, the government launched an ethanol blending program aimed at boosting energy security, supporting farmers, and promoting environmental sustainability, which has recently become a headline across the nation. For these auto brands, they have to update the new vehicle powertrains to BS6 Phase 2 compliance to run on E20 fuel.
The distribution of E20 fuel, containing 20% ethanol blended with 80% petrol, has raised questions about vehicle safety, performance, and long-term impact, sparking widespread debate among consumers and industry experts.
Many vehicle owners are now facing problems regarding reduced mileage, engine corrosion, and insurance complications due to the ethanol-blended fuel. Those vehicles that were manufactured before 2020 are not calibrated enough to run a higher octane biofuel, so they are now creating problems for the long run. These factors can lead to fuel system component wear, including seals, gaskets, and injectors, which may demand recalibration or replacement to maintain optimal engine function.
The Ministry of Petroleum and Natural Gas has issued strong clarifications that E20 fuel does not impact insurance coverage and continues to push for ethanol blending as a cornerstone of India's energy transition.
Those owners who owned cars before 2020 are advised to regularly maintain their cars and add appropriate fuel additives. They should also visit dealership service centers for potential part replacements. Those parts that are on the verge of being affected by corrosion should be replaced immediately to ensure.
It's also crucial for users to avoid prolonged storage of ethanol-blended fuel in tanks without proper drying, as ethanol’s hygroscopic properties can foster corrosion if exposed to moisture.
The ethanol-blended fuels like E20 showcase adaptation challenges for older vehicles; current evidence indicates that newer models are safe and efficient on biofuel. With continued support, awareness, and maintenance, Indian car consumers can confidently pivot toward this eco-friendly fuel future without fear.
Also Read: Entry-Level Bikes & Cars Might Get Cheaper: How India's New GST Reforms Reshape the Automotive Industry
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