E10 petrol proposed for older cars to avoid 6-7% energy penalty from E20

Why in news

Chief Economic Advisor V Anantha Nageswaran proposed reintroducing E10 petrol for older vehicles to mitigate a 6-7% energy penalty caused by E20 blends.

Background

The proposal addresses compatibility issues where older vehicle engines face lower fuel efficiency with high ethanol blends. E20 currently contains 20% ethanol, while E10 contains 10%.

Facts for Prelims

• FactE20 petrol contains 20% ethanol and 80% gasoline.
• FactE10 petrol contains 10% ethanol and 90% gasoline.
• S&TEthanol blending is a key component of India's biofuel policy to reduce crude oil imports.

For Mains

Q. Discuss the challenges and opportunities associated with India's ethanol blending program, specifically regarding vehicle compatibility and energy security.

Dimensions to cover in your answer

• Energy security and import reduction
• Technical challenges for older vehicle fleets
• Impact on agricultural sector (sugarcane/grain)
• Way forward: phased transition and infrastructure

Keywords: Energy Security · Ethanol Blending · Fuel Efficiency · Compatibility Issues · Biofuels

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