India's E20 ethanol mandate exposes 240 million legacy vehicles to chemical degradation

Gist India is implementing a nationwide shift to E20 fuel petrol blended with 20% ethanol to reduce crude oil imports and lower greenhouse gas emissions . However, this rapid environmental transition poses a severe operational risk to older vehicular fleets, whose engines lack the chemical resilience required for high-alcohol fuels . For civil services aspirants, this development highlights the complex governance challenge of executing macro-level ecological policies without compromising the property and safety of millions of ordinary consumers relying on legacy assets . Background - The Government of India has mandated that all states and Union Territories must supply petrol blended with up to 20% ethanol maintaining a minimum Research Octane Number RON of 95 by April 1, 2026 , superseding a previous 2021 directive that capped blending at 10% . - To prepare for this transition, authorities enforced the Bharat Stage 6 Phase 2 Real Driving Emissions BS 6 Phase 2 RDE standards for all automobile manufacturers starting in April 2023 . - Vehicles manufactured after the April 2023 cutoff are built with specialized ethanol-resistant components , such as…