E20 Petrol: What 20% Ethanol Really Does to Your Car

E20 is 20% ethanol, now the standard petrol across India since 2025

Mileage typically drops 1-2% in newer cars and up to 6% in pre-2023 vehicles

Cars built after April 2023 are 'E20-material-compliant'; older rubber and plastic parts wear faster

E20 is safe to use in almost all petrol cars — no engine will be destroyed overnight

Older-car owners should watch fuel lines, gaskets and avoid leaving the tank near-empty for weeks